From a74be53a3c301cb95cd2823c11fddd7de1444559 Mon Sep 17 00:00:00 2001
From: Mathias Bynens <mathias@qiwi.be>
Date: Tue, 8 Dec 2020 08:34:49 +0100
Subject: [PATCH] =?UTF-8?q?Add=20@slightlyoff=E2=80=99s=20clever=20solutio?=
 =?UTF-8?q?n?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

https://github.com/tc39/ecmarkup/pull/263#issuecomment-740365374
---
 after.html | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/after.html b/after.html
index e025476..f1553d3 100644
--- a/after.html
+++ b/after.html
@@ -57,6 +57,59 @@
     background: #fff;
   }
 </style>
+<script type="module">
+  // This code was written by Alex Russell (@slightlyoff), here:
+  // https://github.com/tc39/ecmarkup/pull/263#issuecomment-740365374
+
+  const eqIsh = (a, b, fuzz=1) => {
+    return Math.abs(a - b) <= fuzz;
+  };
+
+  const rectNotEQ = (a, b, fuzz=2) => {
+    return (!eqIsh(a.width, b.width, fuzz) ||
+            !eqIsh(a.height, b.height, fuzz));
+  };
+
+  const added = new WeakMap();
+  // Only call this when it's known cheap; post layout.
+  const setHeight = (el, rect=el.getBoundingClientRect()) => {
+    const old = added.get(el);
+    added.set(el, rect);
+    // Set intrinsic size to prevent jumping on un-painting:
+    //    https://drafts.csswg.org/css-sizing-4/#intrinsic-size-override
+    if (!old || rectNotEQ(old, rect)) {
+      el.attributeStyleMap.set(
+        'contain-intrinsic-size',
+        `${parseInt(rect.width)}px ${parseInt(rect.height)}px`
+      );
+    }
+  };
+
+  const iobs = new IntersectionObserver((entries, o) => {
+      entries.forEach((entry) => {
+        if (entry.intersectionRatio > 0) {
+          setHeight(entry.target, entry.boundingClientRect);
+        }
+      });
+    },
+    { rootMargin: '50px 0px 100px 0px'}
+  );
+
+  const robs = new ResizeObserver((entries, o) => {
+    entries.forEach((entry) => {
+      if (entry.contentRect.height) {
+        setHeight(entry.target, entry.contentRect);
+      }
+    });
+  });
+
+  const selector = '#spec-container > emu-clause, #spec-container > emu-import > emu-clause';
+  const elements = document.querySelectorAll(selector);
+  for (const element of elements) {
+    iobs.observe(element);
+    robs.observe(element);
+  }
+</script>
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 <body><div id="menu-toggle">☰</div><div id="menu-spacer"></div><div id="menu"><div id="menu-search"><input type="text" id="menu-search-box" placeholder="Search..."><div id="menu-search-results" class="inactive"></div></div><div id="menu-pins"><div class="menu-pane-header">Pins</div><ul id="menu-pins-list"></ul></div><div class="menu-pane-header">Table of Contents</div><div id="menu-toc"><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-intro" title="Introduction">Introduction</a></li><li><span class="item-toggle-none"></span><a href="#sec-scope" title="Scope"><span class="secnum">1</span> Scope</a></li><li><span class="item-toggle-none"></span><a href="#sec-conformance" title="Conformance"><span class="secnum">2</span> Conformance</a></li><li><span class="item-toggle-none"></span><a href="#sec-normative-references" title="Normative References"><span class="secnum">3</span> Normative References</a></li><li><span class="item-toggle">◢</span><a href="#sec-overview" title="Overview"><span class="secnum">4</span> Overview</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-web-scripting" title="Web Scripting"><span class="secnum">4.1</span> Web Scripting</a></li><li><span class="item-toggle-none"></span><a href="#sec-hosts-and-implementations" title="Hosts and Implementations"><span class="secnum">4.2</span> Hosts and Implementations</a></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-overview" title="ECMAScript Overview"><span class="secnum">4.3</span> ECMAScript Overview</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-objects" title="Objects"><span class="secnum">4.3.1</span> Objects</a></li><li><span class="item-toggle-none"></span><a href="#sec-strict-variant-of-ecmascript" title="The Strict Variant of ECMAScript"><span class="secnum">4.3.2</span> The Strict Variant of ECMAScript</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-terms-and-definitions" title="Terms and Definitions"><span class="secnum">4.4</span> Terms and Definitions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-implementation-approximated" title="implementation-approximated"><span class="secnum">4.4.1</span> implementation-approximated</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-implementation-defined" title="implementation-defined"><span class="secnum">4.4.2</span> implementation-defined</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-host-defined" title="host-defined"><span class="secnum">4.4.3</span> host-defined</a></li><li><span class="item-toggle-none"></span><a href="#sec-type" title="type"><span class="secnum">4.4.4</span> type</a></li><li><span class="item-toggle-none"></span><a href="#sec-primitive-value" title="primitive value"><span class="secnum">4.4.5</span> primitive value</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-object" title="object"><span class="secnum">4.4.6</span> object</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor" title="constructor"><span class="secnum">4.4.7</span> constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-prototype" title="prototype"><span class="secnum">4.4.8</span> prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-ordinary-object" title="ordinary object"><span class="secnum">4.4.9</span> ordinary object</a></li><li><span class="item-toggle-none"></span><a href="#sec-exotic-object" title="exotic object"><span class="secnum">4.4.10</span> exotic object</a></li><li><span class="item-toggle-none"></span><a href="#sec-standard-object" title="standard object"><span class="secnum">4.4.11</span> standard object</a></li><li><span class="item-toggle-none"></span><a href="#sec-built-in-object" title="built-in object"><span class="secnum">4.4.12</span> built-in object</a></li><li><span class="item-toggle-none"></span><a href="#sec-undefined-value" title="undefined value"><span class="secnum">4.4.13</span> undefined value</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-undefined-type" title="Undefined type"><span class="secnum">4.4.14</span> Undefined type</a></li><li><span class="item-toggle-none"></span><a href="#sec-null-value" title="null value"><span class="secnum">4.4.15</span> null value</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-null-type" title="Null type"><span class="secnum">4.4.16</span> Null type</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-boolean-value" title="Boolean value"><span class="secnum">4.4.17</span> Boolean value</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-boolean-type" title="Boolean type"><span class="secnum">4.4.18</span> Boolean type</a></li><li><span class="item-toggle-none"></span><a href="#sec-boolean-object" title="Boolean object"><span class="secnum">4.4.19</span> Boolean object</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-string-value" title="String value"><span class="secnum">4.4.20</span> String value</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-string-type" title="String type"><span class="secnum">4.4.21</span> String type</a></li><li><span class="item-toggle-none"></span><a href="#sec-string-object" title="String object"><span class="secnum">4.4.22</span> String object</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-number-value" title="Number value"><span class="secnum">4.4.23</span> Number value</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-number-type" title="Number type"><span class="secnum">4.4.24</span> Number type</a></li><li><span class="item-toggle-none"></span><a href="#sec-number-object" title="Number object"><span class="secnum">4.4.25</span> Number object</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-infinity" title="Infinity"><span class="secnum">4.4.26</span> Infinity</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-nan" title="NaN"><span class="secnum">4.4.27</span> NaN</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-bigint-value" title="BigInt value"><span class="secnum">4.4.28</span> BigInt value</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-bigint-type" title="BigInt type"><span class="secnum">4.4.29</span> BigInt type</a></li><li><span class="item-toggle-none"></span><a href="#sec-bigint-object" title="BigInt object"><span class="secnum">4.4.30</span> BigInt object</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol-value" title="Symbol value"><span class="secnum">4.4.31</span> Symbol value</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-symbol-type" title="Symbol type"><span class="secnum">4.4.32</span> Symbol type</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol-object" title="Symbol object"><span class="secnum">4.4.33</span> Symbol object</a></li><li><span class="item-toggle-none"></span><a href="#sec-terms-and-definitions-function" title="function"><span class="secnum">4.4.34</span> function</a></li><li><span class="item-toggle-none"></span><a href="#sec-built-in-function" title="built-in function"><span class="secnum">4.4.35</span> built-in function</a></li><li><span class="item-toggle-none"></span><a href="#sec-property" title="property"><span class="secnum">4.4.36</span> property</a></li><li><span class="item-toggle-none"></span><a href="#sec-method" title="method"><span class="secnum">4.4.37</span> method</a></li><li><span class="item-toggle-none"></span><a href="#sec-built-in-method" title="built-in method"><span class="secnum">4.4.38</span> built-in method</a></li><li><span class="item-toggle-none"></span><a href="#sec-attribute" title="attribute"><span class="secnum">4.4.39</span> attribute</a></li><li><span class="item-toggle-none"></span><a href="#sec-own-property" title="own property"><span class="secnum">4.4.40</span> own property</a></li><li><span class="item-toggle-none"></span><a href="#sec-inherited-property" title="inherited property"><span class="secnum">4.4.41</span> inherited property</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-organization-of-this-specification" title="Organization of This Specification"><span class="secnum">4.5</span> Organization of This Specification</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-notational-conventions" title="Notational Conventions"><span class="secnum">5</span> Notational Conventions</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-syntactic-and-lexical-grammars" title="Syntactic and Lexical Grammars"><span class="secnum">5.1</span> Syntactic and Lexical Grammars</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-context-free-grammars" title="Context-Free Grammars"><span class="secnum">5.1.1</span> Context-Free Grammars</a></li><li><span class="item-toggle-none"></span><a href="#sec-lexical-and-regexp-grammars" title="The Lexical and RegExp Grammars"><span class="secnum">5.1.2</span> The Lexical and RegExp Grammars</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-string-grammar" title="The Numeric String Grammar"><span class="secnum">5.1.3</span> The Numeric String Grammar</a></li><li><span class="item-toggle-none"></span><a href="#sec-syntactic-grammar" title="The Syntactic Grammar"><span class="secnum">5.1.4</span> The Syntactic Grammar</a></li><li><span class="item-toggle-none"></span><a href="#sec-grammar-notation" title="Grammar Notation"><span class="secnum">5.1.5</span> Grammar Notation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-algorithm-conventions" title="Algorithm Conventions"><span class="secnum">5.2</span> Algorithm Conventions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-algorithm-conventions-abstract-operations" title="Abstract Operations"><span class="secnum">5.2.1</span> Abstract Operations</a></li><li><span class="item-toggle-none"></span><a href="#sec-algorithm-conventions-syntax-directed-operations" title="Syntax-Directed Operations"><span class="secnum">5.2.2</span> Syntax-Directed Operations</a></li><li><span class="item-toggle">◢</span><a href="#sec-runtime-semantics" title="Runtime Semantics"><span class="secnum">5.2.3</span> Runtime Semantics</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-implicit-completion-values" title="Implicit Completion Values"><span class="secnum">5.2.3.1</span> Implicit Completion Values</a></li><li><span class="item-toggle-none"></span><a href="#sec-throw-an-exception" title="Throw an Exception"><span class="secnum">5.2.3.2</span> Throw an Exception</a></li><li><span class="item-toggle-none"></span><a href="#sec-returnifabrupt" title="ReturnIfAbrupt"><span class="secnum">5.2.3.3</span> ReturnIfAbrupt</a></li><li><span class="item-toggle-none"></span><a href="#sec-returnifabrupt-shorthands" title="ReturnIfAbrupt Shorthands"><span class="secnum">5.2.3.4</span> ReturnIfAbrupt Shorthands</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantic-rules" title="Static Semantics"><span class="secnum">5.2.4</span> Static Semantics</a></li><li><span class="item-toggle-none"></span><a href="#sec-mathematical-operations" title="Mathematical Operations"><span class="secnum">5.2.5</span> Mathematical Operations</a></li><li><span class="item-toggle-none"></span><a href="#sec-value-notation" title="Value Notation"><span class="secnum">5.2.6</span> Value Notation</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-data-types-and-values" title="ECMAScript Data Types and Values"><span class="secnum">6</span> ECMAScript Data Types and Values</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-types" title="ECMAScript Language Types"><span class="secnum">6.1</span> ECMAScript Language Types</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ecmascript-language-types-undefined-type" title="The Undefined Type"><span class="secnum">6.1.1</span> The Undefined Type</a></li><li><span class="item-toggle-none"></span><a href="#sec-ecmascript-language-types-null-type" title="The Null Type"><span class="secnum">6.1.2</span> The Null Type</a></li><li><span class="item-toggle-none"></span><a href="#sec-ecmascript-language-types-boolean-type" title="The Boolean Type"><span class="secnum">6.1.3</span> The Boolean Type</a></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-types-string-type" title="The String Type"><span class="secnum">6.1.4</span> The String Type</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-stringindexof" title="StringIndexOf ( string, searchValue, fromIndex )"><span class="secnum">6.1.4.1</span> StringIndexOf ( <var>string</var>, <var>searchValue</var>, <var>fromIndex</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-types-symbol-type" title="The Symbol Type"><span class="secnum">6.1.5</span> The Symbol Type</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-well-known-symbols" title="Well-Known Symbols"><span class="secnum">6.1.5.1</span> Well-Known Symbols</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-numeric-types" title="Numeric Types"><span class="secnum">6.1.6</span> Numeric Types</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-types-number-type" title="The Number Type"><span class="secnum">6.1.6.1</span> The Number Type</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-unaryMinus" title="Number::unaryMinus ( x )"><span class="secnum">6.1.6.1.1</span> Number::unaryMinus ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-bitwiseNOT" title="Number::bitwiseNOT ( x )"><span class="secnum">6.1.6.1.2</span> Number::bitwiseNOT ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-exponentiate" title="Number::exponentiate ( base, exponent )"><span class="secnum">6.1.6.1.3</span> Number::exponentiate ( <var>base</var>, <var>exponent</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-multiply" title="Number::multiply ( x, y )"><span class="secnum">6.1.6.1.4</span> Number::multiply ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-divide" title="Number::divide ( x, y )"><span class="secnum">6.1.6.1.5</span> Number::divide ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-remainder" title="Number::remainder ( n, d )"><span class="secnum">6.1.6.1.6</span> Number::remainder ( <var>n</var>, <var>d</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-add" title="Number::add ( x, y )"><span class="secnum">6.1.6.1.7</span> Number::add ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-subtract" title="Number::subtract ( x, y )"><span class="secnum">6.1.6.1.8</span> Number::subtract ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-leftShift" title="Number::leftShift ( x, y )"><span class="secnum">6.1.6.1.9</span> Number::leftShift ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-signedRightShift" title="Number::signedRightShift ( x, y )"><span class="secnum">6.1.6.1.10</span> Number::signedRightShift ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-unsignedRightShift" title="Number::unsignedRightShift ( x, y )"><span class="secnum">6.1.6.1.11</span> Number::unsignedRightShift ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-lessThan" title="Number::lessThan ( x, y )"><span class="secnum">6.1.6.1.12</span> Number::lessThan ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-equal" title="Number::equal ( x, y )"><span class="secnum">6.1.6.1.13</span> Number::equal ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-sameValue" title="Number::sameValue ( x, y )"><span class="secnum">6.1.6.1.14</span> Number::sameValue ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-sameValueZero" title="Number::sameValueZero ( x, y )"><span class="secnum">6.1.6.1.15</span> Number::sameValueZero ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numberbitwiseop" title="NumberBitwiseOp ( op, x, y )"><span class="secnum">6.1.6.1.16</span> NumberBitwiseOp ( <var>op</var>, <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-bitwiseAND" title="Number::bitwiseAND ( x, y )"><span class="secnum">6.1.6.1.17</span> Number::bitwiseAND ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-bitwiseXOR" title="Number::bitwiseXOR ( x, y )"><span class="secnum">6.1.6.1.18</span> Number::bitwiseXOR ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-bitwiseOR" title="Number::bitwiseOR ( x, y )"><span class="secnum">6.1.6.1.19</span> Number::bitwiseOR ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-number-tostring" title="Number::toString ( x )"><span class="secnum">6.1.6.1.20</span> Number::toString ( <var>x</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-types-bigint-type" title="The BigInt Type"><span class="secnum">6.1.6.2</span> The BigInt Type</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-unaryMinus" title="BigInt::unaryMinus ( x )"><span class="secnum">6.1.6.2.1</span> BigInt::unaryMinus ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-bitwiseNOT" title="BigInt::bitwiseNOT ( x )"><span class="secnum">6.1.6.2.2</span> BigInt::bitwiseNOT ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-exponentiate" title="BigInt::exponentiate ( base, exponent )"><span class="secnum">6.1.6.2.3</span> BigInt::exponentiate ( <var>base</var>, <var>exponent</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-multiply" title="BigInt::multiply ( x, y )"><span class="secnum">6.1.6.2.4</span> BigInt::multiply ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-divide" title="BigInt::divide ( x, y )"><span class="secnum">6.1.6.2.5</span> BigInt::divide ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-remainder" title="BigInt::remainder ( n, d )"><span class="secnum">6.1.6.2.6</span> BigInt::remainder ( <var>n</var>, <var>d</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-add" title="BigInt::add ( x, y )"><span class="secnum">6.1.6.2.7</span> BigInt::add ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-subtract" title="BigInt::subtract ( x, y )"><span class="secnum">6.1.6.2.8</span> BigInt::subtract ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-leftShift" title="BigInt::leftShift ( x, y )"><span class="secnum">6.1.6.2.9</span> BigInt::leftShift ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-signedRightShift" title="BigInt::signedRightShift ( x, y )"><span class="secnum">6.1.6.2.10</span> BigInt::signedRightShift ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-unsignedRightShift" title="BigInt::unsignedRightShift ( x, y )"><span class="secnum">6.1.6.2.11</span> BigInt::unsignedRightShift ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-lessThan" title="BigInt::lessThan ( x, y )"><span class="secnum">6.1.6.2.12</span> BigInt::lessThan ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-equal" title="BigInt::equal ( x, y )"><span class="secnum">6.1.6.2.13</span> BigInt::equal ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-sameValue" title="BigInt::sameValue ( x, y )"><span class="secnum">6.1.6.2.14</span> BigInt::sameValue ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-sameValueZero" title="BigInt::sameValueZero ( x, y )"><span class="secnum">6.1.6.2.15</span> BigInt::sameValueZero ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-binaryand" title="BinaryAnd ( x, y )"><span class="secnum">6.1.6.2.16</span> BinaryAnd ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-binaryor" title="BinaryOr ( x, y )"><span class="secnum">6.1.6.2.17</span> BinaryOr ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-binaryxor" title="BinaryXor ( x, y )"><span class="secnum">6.1.6.2.18</span> BinaryXor ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-bigintbitwiseop" title="BigIntBitwiseOp ( op, x, y )"><span class="secnum">6.1.6.2.19</span> BigIntBitwiseOp ( <var>op</var>, <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-bitwiseAND" title="BigInt::bitwiseAND ( x, y )"><span class="secnum">6.1.6.2.20</span> BigInt::bitwiseAND ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-bitwiseXOR" title="BigInt::bitwiseXOR ( x, y )"><span class="secnum">6.1.6.2.21</span> BigInt::bitwiseXOR ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-bitwiseOR" title="BigInt::bitwiseOR ( x, y )"><span class="secnum">6.1.6.2.22</span> BigInt::bitwiseOR ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numeric-types-bigint-tostring" title="BigInt::toString ( x )"><span class="secnum">6.1.6.2.23</span> BigInt::toString ( <var>x</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-object-type" title="The Object Type"><span class="secnum">6.1.7</span> The Object Type</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-property-attributes" title="Property Attributes"><span class="secnum">6.1.7.1</span> Property Attributes</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-internal-methods-and-internal-slots" title="Object Internal Methods and Internal Slots"><span class="secnum">6.1.7.2</span> Object Internal Methods and Internal Slots</a></li><li><span class="item-toggle-none"></span><a href="#sec-invariants-of-the-essential-internal-methods" title="Invariants of the Essential Internal Methods"><span class="secnum">6.1.7.3</span> Invariants of the Essential Internal Methods</a></li><li><span class="item-toggle-none"></span><a href="#sec-well-known-intrinsic-objects" title="Well-Known Intrinsic Objects"><span class="secnum">6.1.7.4</span> Well-Known Intrinsic Objects</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-specification-types" title="ECMAScript Specification Types"><span class="secnum">6.2</span> ECMAScript Specification Types</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-list-and-record-specification-type" title="The List and Record Specification Types"><span class="secnum">6.2.1</span> The List and Record Specification Types</a></li><li><span class="item-toggle-none"></span><a href="#sec-set-and-relation-specification-type" title="The Set and Relation Specification Types"><span class="secnum">6.2.2</span> The Set and Relation Specification Types</a></li><li><span class="item-toggle">◢</span><a href="#sec-completion-record-specification-type" title="The Completion Record Specification Type"><span class="secnum">6.2.3</span> The Completion Record Specification Type</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#await" title="Await"><span class="secnum">6.2.3.1</span> Await</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#await-fulfilled" title="Await Fulfilled Functions"><span class="secnum">6.2.3.1.1</span> Await Fulfilled Functions</a></li><li><span class="item-toggle-none"></span><a href="#await-rejected" title="Await Rejected Functions"><span class="secnum">6.2.3.1.2</span> Await Rejected Functions</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-normalcompletion" title="NormalCompletion"><span class="secnum">6.2.3.2</span> NormalCompletion</a></li><li><span class="item-toggle-none"></span><a href="#sec-throwcompletion" title="ThrowCompletion"><span class="secnum">6.2.3.3</span> ThrowCompletion</a></li><li><span class="item-toggle-none"></span><a href="#sec-updateempty" title="UpdateEmpty ( completionRecord, value )"><span class="secnum">6.2.3.4</span> UpdateEmpty ( <var>completionRecord</var>, <var>value</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-reference-specification-type" title="The Reference Specification Type"><span class="secnum">6.2.4</span> The Reference Specification Type</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-getbase" title="GetBase ( V )"><span class="secnum">6.2.4.1</span> GetBase ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getreferencedname" title="GetReferencedName ( V )"><span class="secnum">6.2.4.2</span> GetReferencedName ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isstrictreference" title="IsStrictReference ( V )"><span class="secnum">6.2.4.3</span> IsStrictReference ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hasprimitivebase" title="HasPrimitiveBase ( V )"><span class="secnum">6.2.4.4</span> HasPrimitiveBase ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-ispropertyreference" title="IsPropertyReference ( V )"><span class="secnum">6.2.4.5</span> IsPropertyReference ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isunresolvablereference" title="IsUnresolvableReference ( V )"><span class="secnum">6.2.4.6</span> IsUnresolvableReference ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-issuperreference" title="IsSuperReference ( V )"><span class="secnum">6.2.4.7</span> IsSuperReference ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getvalue" title="GetValue ( V )"><span class="secnum">6.2.4.8</span> GetValue ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-putvalue" title="PutValue ( V, W )"><span class="secnum">6.2.4.9</span> PutValue ( <var>V</var>, <var>W</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getthisvalue" title="GetThisValue ( V )"><span class="secnum">6.2.4.10</span> GetThisValue ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-initializereferencedbinding" title="InitializeReferencedBinding ( V, W )"><span class="secnum">6.2.4.11</span> InitializeReferencedBinding ( <var>V</var>, <var>W</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-property-descriptor-specification-type" title="The Property Descriptor Specification Type"><span class="secnum">6.2.5</span> The Property Descriptor Specification Type</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-isaccessordescriptor" title="IsAccessorDescriptor ( Desc )"><span class="secnum">6.2.5.1</span> IsAccessorDescriptor ( <var>Desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isdatadescriptor" title="IsDataDescriptor ( Desc )"><span class="secnum">6.2.5.2</span> IsDataDescriptor ( <var>Desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isgenericdescriptor" title="IsGenericDescriptor ( Desc )"><span class="secnum">6.2.5.3</span> IsGenericDescriptor ( <var>Desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-frompropertydescriptor" title="FromPropertyDescriptor ( Desc )"><span class="secnum">6.2.5.4</span> FromPropertyDescriptor ( <var>Desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-topropertydescriptor" title="ToPropertyDescriptor ( Obj )"><span class="secnum">6.2.5.5</span> ToPropertyDescriptor ( <var>Obj</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-completepropertydescriptor" title="CompletePropertyDescriptor ( Desc )"><span class="secnum">6.2.5.6</span> CompletePropertyDescriptor ( <var>Desc</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-lexical-environment-and-environment-record-specification-types" title="The Environment Record Specification Type"><span class="secnum">6.2.6</span> The Environment Record Specification Type</a></li><li><span class="item-toggle-none"></span><a href="#sec-abstract-closure" title="The Abstract Closure Specification Type"><span class="secnum">6.2.7</span> The Abstract Closure Specification Type</a></li><li><span class="item-toggle">◢</span><a href="#sec-data-blocks" title="Data Blocks"><span class="secnum">6.2.8</span> Data Blocks</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createbytedatablock" title="CreateByteDataBlock ( size )"><span class="secnum">6.2.8.1</span> CreateByteDataBlock ( <var>size</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createsharedbytedatablock" title="CreateSharedByteDataBlock ( size )"><span class="secnum">6.2.8.2</span> CreateSharedByteDataBlock ( <var>size</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-copydatablockbytes" title="CopyDataBlockBytes ( toBlock, toIndex, fromBlock, fromIndex, count )"><span class="secnum">6.2.8.3</span> CopyDataBlockBytes ( <var>toBlock</var>, <var>toIndex</var>, <var>fromBlock</var>, <var>fromIndex</var>, <var>count</var> )</a></li></ol></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-abstract-operations" title="Abstract Operations"><span class="secnum">7</span> Abstract Operations</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-type-conversion" title="Type Conversion"><span class="secnum">7.1</span> Type Conversion</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-toprimitive" title="ToPrimitive ( input [ , preferredType ] )"><span class="secnum">7.1.1</span> ToPrimitive ( <var>input</var> [ , <var>preferredType</var> ] )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinarytoprimitive" title="OrdinaryToPrimitive ( O, hint )"><span class="secnum">7.1.1.1</span> OrdinaryToPrimitive ( <var>O</var>, <var>hint</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-toboolean" title="ToBoolean ( argument )"><span class="secnum">7.1.2</span> ToBoolean ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-tonumeric" title="ToNumeric ( value )"><span class="secnum">7.1.3</span> ToNumeric ( <var>value</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-tonumber" title="ToNumber ( argument )"><span class="secnum">7.1.4</span> ToNumber ( <var>argument</var> )</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-tonumber-applied-to-the-string-type" title="ToNumber Applied to the String Type"><span class="secnum">7.1.4.1</span> ToNumber Applied to the String Type</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-mv-s" title="Runtime Semantics: MV"><span class="secnum">7.1.4.1.1</span> RS: MV</a></li></ol></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-tointegerorinfinity" title="ToIntegerOrInfinity ( argument )"><span class="secnum">7.1.5</span> ToIntegerOrInfinity ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-toint32" title="ToInt32 ( argument )"><span class="secnum">7.1.6</span> ToInt32 ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-touint32" title="ToUint32 ( argument )"><span class="secnum">7.1.7</span> ToUint32 ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-toint16" title="ToInt16 ( argument )"><span class="secnum">7.1.8</span> ToInt16 ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-touint16" title="ToUint16 ( argument )"><span class="secnum">7.1.9</span> ToUint16 ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-toint8" title="ToInt8 ( argument )"><span class="secnum">7.1.10</span> ToInt8 ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-touint8" title="ToUint8 ( argument )"><span class="secnum">7.1.11</span> ToUint8 ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-touint8clamp" title="ToUint8Clamp ( argument )"><span class="secnum">7.1.12</span> ToUint8Clamp ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-tobigint" title="ToBigInt ( argument )"><span class="secnum">7.1.13</span> ToBigInt ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-stringtobigint" title="StringToBigInt ( argument )"><span class="secnum">7.1.14</span> StringToBigInt ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-tobigint64" title="ToBigInt64 ( argument )"><span class="secnum">7.1.15</span> ToBigInt64 ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-tobiguint64" title="ToBigUint64 ( argument )"><span class="secnum">7.1.16</span> ToBigUint64 ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-tostring" title="ToString ( argument )"><span class="secnum">7.1.17</span> ToString ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-toobject" title="ToObject ( argument )"><span class="secnum">7.1.18</span> ToObject ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-topropertykey" title="ToPropertyKey ( argument )"><span class="secnum">7.1.19</span> ToPropertyKey ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-tolength" title="ToLength ( argument )"><span class="secnum">7.1.20</span> ToLength ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-canonicalnumericindexstring" title="CanonicalNumericIndexString ( argument )"><span class="secnum">7.1.21</span> CanonicalNumericIndexString ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-toindex" title="ToIndex ( value )"><span class="secnum">7.1.22</span> ToIndex ( <var>value</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-testing-and-comparison-operations" title="Testing and Comparison Operations"><span class="secnum">7.2</span> Testing and Comparison Operations</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-requireobjectcoercible" title="RequireObjectCoercible ( argument )"><span class="secnum">7.2.1</span> RequireObjectCoercible ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isarray" title="IsArray ( argument )"><span class="secnum">7.2.2</span> IsArray ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-iscallable" title="IsCallable ( argument )"><span class="secnum">7.2.3</span> IsCallable ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isconstructor" title="IsConstructor ( argument )"><span class="secnum">7.2.4</span> IsConstructor ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isextensible-o" title="IsExtensible ( O )"><span class="secnum">7.2.5</span> IsExtensible ( <var>O</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isintegralnumber" title="IsIntegralNumber ( argument )"><span class="secnum">7.2.6</span> IsIntegralNumber ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-ispropertykey" title="IsPropertyKey ( argument )"><span class="secnum">7.2.7</span> IsPropertyKey ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isregexp" title="IsRegExp ( argument )"><span class="secnum">7.2.8</span> IsRegExp ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isstringprefix" title="IsStringPrefix ( p, q )"><span class="secnum">7.2.9</span> IsStringPrefix ( <var>p</var>, <var>q</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-samevalue" title="SameValue ( x, y )"><span class="secnum">7.2.10</span> SameValue ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-samevaluezero" title="SameValueZero ( x, y )"><span class="secnum">7.2.11</span> SameValueZero ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-samevaluenonnumeric" title="SameValueNonNumeric ( x, y )"><span class="secnum">7.2.12</span> SameValueNonNumeric ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-abstract-relational-comparison" title="Abstract Relational Comparison"><span class="secnum">7.2.13</span> Abstract Relational Comparison</a></li><li><span class="item-toggle-none"></span><a href="#sec-abstract-equality-comparison" title="Abstract Equality Comparison"><span class="secnum">7.2.14</span> Abstract Equality Comparison</a></li><li><span class="item-toggle-none"></span><a href="#sec-strict-equality-comparison" title="Strict Equality Comparison"><span class="secnum">7.2.15</span> Strict Equality Comparison</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-operations-on-objects" title="Operations on Objects"><span class="secnum">7.3</span> Operations on Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-makebasicobject" title="MakeBasicObject ( internalSlotsList )"><span class="secnum">7.3.1</span> MakeBasicObject ( <var>internalSlotsList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-o-p" title="Get ( O, P )"><span class="secnum">7.3.2</span> Get ( <var>O</var>, <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getv" title="GetV ( V, P )"><span class="secnum">7.3.3</span> GetV ( <var>V</var>, <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-set-o-p-v-throw" title="Set ( O, P, V, Throw )"><span class="secnum">7.3.4</span> Set ( <var>O</var>, <var>P</var>, <var>V</var>, <var>Throw</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createdataproperty" title="CreateDataProperty ( O, P, V )"><span class="secnum">7.3.5</span> CreateDataProperty ( <var>O</var>, <var>P</var>, <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createmethodproperty" title="CreateMethodProperty ( O, P, V )"><span class="secnum">7.3.6</span> CreateMethodProperty ( <var>O</var>, <var>P</var>, <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createdatapropertyorthrow" title="CreateDataPropertyOrThrow ( O, P, V )"><span class="secnum">7.3.7</span> CreateDataPropertyOrThrow ( <var>O</var>, <var>P</var>, <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-definepropertyorthrow" title="DefinePropertyOrThrow ( O, P, desc )"><span class="secnum">7.3.8</span> DefinePropertyOrThrow ( <var>O</var>, <var>P</var>, <var>desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-deletepropertyorthrow" title="DeletePropertyOrThrow ( O, P )"><span class="secnum">7.3.9</span> DeletePropertyOrThrow ( <var>O</var>, <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getmethod" title="GetMethod ( V, P )"><span class="secnum">7.3.10</span> GetMethod ( <var>V</var>, <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hasproperty" title="HasProperty ( O, P )"><span class="secnum">7.3.11</span> HasProperty ( <var>O</var>, <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hasownproperty" title="HasOwnProperty ( O, P )"><span class="secnum">7.3.12</span> HasOwnProperty ( <var>O</var>, <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-call" title="Call ( F, V [ , argumentsList ] )"><span class="secnum">7.3.13</span> Call ( <var>F</var>, <var>V</var> [ , <var>argumentsList</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-construct" title="Construct ( F [ , argumentsList [ , newTarget ] ] )"><span class="secnum">7.3.14</span> Construct ( <var>F</var> [ , <var>argumentsList</var> [ , <var>newTarget</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-setintegritylevel" title="SetIntegrityLevel ( O, level )"><span class="secnum">7.3.15</span> SetIntegrityLevel ( <var>O</var>, <var>level</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-testintegritylevel" title="TestIntegrityLevel ( O, level )"><span class="secnum">7.3.16</span> TestIntegrityLevel ( <var>O</var>, <var>level</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createarrayfromlist" title="CreateArrayFromList ( elements )"><span class="secnum">7.3.17</span> CreateArrayFromList ( <var>elements</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-lengthofarraylike" title="LengthOfArrayLike ( obj )"><span class="secnum">7.3.18</span> LengthOfArrayLike ( <var>obj</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createlistfromarraylike" title="CreateListFromArrayLike ( obj [ , elementTypes ] )"><span class="secnum">7.3.19</span> CreateListFromArrayLike ( <var>obj</var> [ , <var>elementTypes</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-invoke" title="Invoke ( V, P [ , argumentsList ] )"><span class="secnum">7.3.20</span> Invoke ( <var>V</var>, <var>P</var> [ , <var>argumentsList</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-ordinaryhasinstance" title="OrdinaryHasInstance ( C, O )"><span class="secnum">7.3.21</span> OrdinaryHasInstance ( <var>C</var>, <var>O</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-speciesconstructor" title="SpeciesConstructor ( O, defaultConstructor )"><span class="secnum">7.3.22</span> SpeciesConstructor ( <var>O</var>, <var>defaultConstructor</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-enumerableownpropertynames" title="EnumerableOwnPropertyNames ( O, kind )"><span class="secnum">7.3.23</span> EnumerableOwnPropertyNames ( <var>O</var>, <var>kind</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getfunctionrealm" title="GetFunctionRealm ( obj )"><span class="secnum">7.3.24</span> GetFunctionRealm ( <var>obj</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-copydataproperties" title="CopyDataProperties ( target, source, excludedItems )"><span class="secnum">7.3.25</span> CopyDataProperties ( <var>target</var>, <var>source</var>, <var>excludedItems</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-operations-on-iterator-objects" title="Operations on Iterator Objects"><span class="secnum">7.4</span> Operations on Iterator Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-getiterator" title="GetIterator ( obj [ , hint [ , method ] ] )"><span class="secnum">7.4.1</span> GetIterator ( <var>obj</var> [ , <var>hint</var> [ , <var>method</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-iteratornext" title="IteratorNext ( iteratorRecord [ , value ] )"><span class="secnum">7.4.2</span> IteratorNext ( <var>iteratorRecord</var> [ , <var>value</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-iteratorcomplete" title="IteratorComplete ( iterResult )"><span class="secnum">7.4.3</span> IteratorComplete ( <var>iterResult</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-iteratorvalue" title="IteratorValue ( iterResult )"><span class="secnum">7.4.4</span> IteratorValue ( <var>iterResult</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-iteratorstep" title="IteratorStep ( iteratorRecord )"><span class="secnum">7.4.5</span> IteratorStep ( <var>iteratorRecord</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-iteratorclose" title="IteratorClose ( iteratorRecord, completion )"><span class="secnum">7.4.6</span> IteratorClose ( <var>iteratorRecord</var>, <var>completion</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-asynciteratorclose" title="AsyncIteratorClose ( iteratorRecord, completion )"><span class="secnum">7.4.7</span> AsyncIteratorClose ( <var>iteratorRecord</var>, <var>completion</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createiterresultobject" title="CreateIterResultObject ( value, done )"><span class="secnum">7.4.8</span> CreateIterResultObject ( <var>value</var>, <var>done</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-createlistiteratorRecord" title="CreateListIteratorRecord ( list )"><span class="secnum">7.4.9</span> CreateListIteratorRecord ( <var>list</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-listiteratornext-functions" title="ListIteratorNext Functions"><span class="secnum">7.4.9.1</span> ListIteratorNext Functions</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-iterabletolist" title="IterableToList ( items [ , method ] )"><span class="secnum">7.4.10</span> IterableToList ( <var>items</var> [ , <var>method</var> ] )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-executable-code-and-execution-contexts" title="Executable Code and Execution Contexts"><span class="secnum">8</span> Executable Code and Execution Contexts</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-environment-records" title="Environment Records"><span class="secnum">8.1</span> Environment Records</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-the-environment-record-type-hierarchy" title="The Environment Record Type Hierarchy"><span class="secnum">8.1.1</span> The Environment Record Type Hierarchy</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-declarative-environment-records" title="Declarative Environment Records"><span class="secnum">8.1.1.1</span> Declarative Environment Records</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-declarative-environment-records-hasbinding-n" title="HasBinding ( N )"><span class="secnum">8.1.1.1.1</span> HasBinding ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-declarative-environment-records-createmutablebinding-n-d" title="CreateMutableBinding ( N, D )"><span class="secnum">8.1.1.1.2</span> CreateMutableBinding ( <var>N</var>, <var>D</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-declarative-environment-records-createimmutablebinding-n-s" title="CreateImmutableBinding ( N, S )"><span class="secnum">8.1.1.1.3</span> CreateImmutableBinding ( <var>N</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-declarative-environment-records-initializebinding-n-v" title="InitializeBinding ( N, V )"><span class="secnum">8.1.1.1.4</span> InitializeBinding ( <var>N</var>, <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-declarative-environment-records-setmutablebinding-n-v-s" title="SetMutableBinding ( N, V, S )"><span class="secnum">8.1.1.1.5</span> SetMutableBinding ( <var>N</var>, <var>V</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-declarative-environment-records-getbindingvalue-n-s" title="GetBindingValue ( N, S )"><span class="secnum">8.1.1.1.6</span> GetBindingValue ( <var>N</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-declarative-environment-records-deletebinding-n" title="DeleteBinding ( N )"><span class="secnum">8.1.1.1.7</span> DeleteBinding ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-declarative-environment-records-hasthisbinding" title="HasThisBinding ( )"><span class="secnum">8.1.1.1.8</span> HasThisBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-declarative-environment-records-hassuperbinding" title="HasSuperBinding ( )"><span class="secnum">8.1.1.1.9</span> HasSuperBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-declarative-environment-records-withbaseobject" title="WithBaseObject ( )"><span class="secnum">8.1.1.1.10</span> WithBaseObject ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-object-environment-records" title="Object Environment Records"><span class="secnum">8.1.1.2</span> Object Environment Records</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-object-environment-records-hasbinding-n" title="HasBinding ( N )"><span class="secnum">8.1.1.2.1</span> HasBinding ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-environment-records-createmutablebinding-n-d" title="CreateMutableBinding ( N, D )"><span class="secnum">8.1.1.2.2</span> CreateMutableBinding ( <var>N</var>, <var>D</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-environment-records-createimmutablebinding-n-s" title="CreateImmutableBinding ( N, S )"><span class="secnum">8.1.1.2.3</span> CreateImmutableBinding ( <var>N</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-environment-records-initializebinding-n-v" title="InitializeBinding ( N, V )"><span class="secnum">8.1.1.2.4</span> InitializeBinding ( <var>N</var>, <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-environment-records-setmutablebinding-n-v-s" title="SetMutableBinding ( N, V, S )"><span class="secnum">8.1.1.2.5</span> SetMutableBinding ( <var>N</var>, <var>V</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-environment-records-getbindingvalue-n-s" title="GetBindingValue ( N, S )"><span class="secnum">8.1.1.2.6</span> GetBindingValue ( <var>N</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-environment-records-deletebinding-n" title="DeleteBinding ( N )"><span class="secnum">8.1.1.2.7</span> DeleteBinding ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-environment-records-hasthisbinding" title="HasThisBinding ( )"><span class="secnum">8.1.1.2.8</span> HasThisBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-environment-records-hassuperbinding" title="HasSuperBinding ( )"><span class="secnum">8.1.1.2.9</span> HasSuperBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-environment-records-withbaseobject" title="WithBaseObject ( )"><span class="secnum">8.1.1.2.10</span> WithBaseObject ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-function-environment-records" title="Function Environment Records"><span class="secnum">8.1.1.3</span> Function Environment Records</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-bindthisvalue" title="BindThisValue ( V )"><span class="secnum">8.1.1.3.1</span> BindThisValue ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-environment-records-hasthisbinding" title="HasThisBinding ( )"><span class="secnum">8.1.1.3.2</span> HasThisBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-environment-records-hassuperbinding" title="HasSuperBinding ( )"><span class="secnum">8.1.1.3.3</span> HasSuperBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-environment-records-getthisbinding" title="GetThisBinding ( )"><span class="secnum">8.1.1.3.4</span> GetThisBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getsuperbase" title="GetSuperBase ( )"><span class="secnum">8.1.1.3.5</span> GetSuperBase ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-global-environment-records" title="Global Environment Records"><span class="secnum">8.1.1.4</span> Global Environment Records</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-global-environment-records-hasbinding-n" title="HasBinding ( N )"><span class="secnum">8.1.1.4.1</span> HasBinding ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-global-environment-records-createmutablebinding-n-d" title="CreateMutableBinding ( N, D )"><span class="secnum">8.1.1.4.2</span> CreateMutableBinding ( <var>N</var>, <var>D</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-global-environment-records-createimmutablebinding-n-s" title="CreateImmutableBinding ( N, S )"><span class="secnum">8.1.1.4.3</span> CreateImmutableBinding ( <var>N</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-global-environment-records-initializebinding-n-v" title="InitializeBinding ( N, V )"><span class="secnum">8.1.1.4.4</span> InitializeBinding ( <var>N</var>, <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-global-environment-records-setmutablebinding-n-v-s" title="SetMutableBinding ( N, V, S )"><span class="secnum">8.1.1.4.5</span> SetMutableBinding ( <var>N</var>, <var>V</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-global-environment-records-getbindingvalue-n-s" title="GetBindingValue ( N, S )"><span class="secnum">8.1.1.4.6</span> GetBindingValue ( <var>N</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-global-environment-records-deletebinding-n" title="DeleteBinding ( N )"><span class="secnum">8.1.1.4.7</span> DeleteBinding ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-global-environment-records-hasthisbinding" title="HasThisBinding ( )"><span class="secnum">8.1.1.4.8</span> HasThisBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-global-environment-records-hassuperbinding" title="HasSuperBinding ( )"><span class="secnum">8.1.1.4.9</span> HasSuperBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-global-environment-records-withbaseobject" title="WithBaseObject ( )"><span class="secnum">8.1.1.4.10</span> WithBaseObject ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-global-environment-records-getthisbinding" title="GetThisBinding ( )"><span class="secnum">8.1.1.4.11</span> GetThisBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hasvardeclaration" title="HasVarDeclaration ( N )"><span class="secnum">8.1.1.4.12</span> HasVarDeclaration ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-haslexicaldeclaration" title="HasLexicalDeclaration ( N )"><span class="secnum">8.1.1.4.13</span> HasLexicalDeclaration ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hasrestrictedglobalproperty" title="HasRestrictedGlobalProperty ( N )"><span class="secnum">8.1.1.4.14</span> HasRestrictedGlobalProperty ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-candeclareglobalvar" title="CanDeclareGlobalVar ( N )"><span class="secnum">8.1.1.4.15</span> CanDeclareGlobalVar ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-candeclareglobalfunction" title="CanDeclareGlobalFunction ( N )"><span class="secnum">8.1.1.4.16</span> CanDeclareGlobalFunction ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createglobalvarbinding" title="CreateGlobalVarBinding ( N, D )"><span class="secnum">8.1.1.4.17</span> CreateGlobalVarBinding ( <var>N</var>, <var>D</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createglobalfunctionbinding" title="CreateGlobalFunctionBinding ( N, V, D )"><span class="secnum">8.1.1.4.18</span> CreateGlobalFunctionBinding ( <var>N</var>, <var>V</var>, <var>D</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-module-environment-records" title="Module Environment Records"><span class="secnum">8.1.1.5</span> Module Environment Records</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-module-environment-records-getbindingvalue-n-s" title="GetBindingValue ( N, S )"><span class="secnum">8.1.1.5.1</span> GetBindingValue ( <var>N</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-environment-records-deletebinding-n" title="DeleteBinding ( N )"><span class="secnum">8.1.1.5.2</span> DeleteBinding ( <var>N</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-environment-records-hasthisbinding" title="HasThisBinding ( )"><span class="secnum">8.1.1.5.3</span> HasThisBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-environment-records-getthisbinding" title="GetThisBinding ( )"><span class="secnum">8.1.1.5.4</span> GetThisBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createimportbinding" title="CreateImportBinding ( N, M, N2 )"><span class="secnum">8.1.1.5.5</span> CreateImportBinding ( <var>N</var>, <var>M</var>, <var>N2</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-environment-record-operations" title="Environment Record Operations"><span class="secnum">8.1.2</span> Environment Record Operations</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-getidentifierreference" title="GetIdentifierReference ( env, name, strict )"><span class="secnum">8.1.2.1</span> GetIdentifierReference ( <var>env</var>, <var>name</var>, <var>strict</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-newdeclarativeenvironment" title="NewDeclarativeEnvironment ( E )"><span class="secnum">8.1.2.2</span> NewDeclarativeEnvironment ( <var>E</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-newobjectenvironment" title="NewObjectEnvironment ( O, E )"><span class="secnum">8.1.2.3</span> NewObjectEnvironment ( <var>O</var>, <var>E</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-newfunctionenvironment" title="NewFunctionEnvironment ( F, newTarget )"><span class="secnum">8.1.2.4</span> NewFunctionEnvironment ( <var>F</var>, <var>newTarget</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-newglobalenvironment" title="NewGlobalEnvironment ( G, thisValue )"><span class="secnum">8.1.2.5</span> NewGlobalEnvironment ( <var>G</var>, <var>thisValue</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-newmoduleenvironment" title="NewModuleEnvironment ( E )"><span class="secnum">8.1.2.6</span> NewModuleEnvironment ( <var>E</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-code-realms" title="Realms"><span class="secnum">8.2</span> Realms</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createrealm" title="CreateRealm ( )"><span class="secnum">8.2.1</span> CreateRealm ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createintrinsics" title="CreateIntrinsics ( realmRec )"><span class="secnum">8.2.2</span> CreateIntrinsics ( <var>realmRec</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-setrealmglobalobject" title="SetRealmGlobalObject ( realmRec, globalObj, thisValue )"><span class="secnum">8.2.3</span> SetRealmGlobalObject ( <var>realmRec</var>, <var>globalObj</var>, <var>thisValue</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-setdefaultglobalbindings" title="SetDefaultGlobalBindings ( realmRec )"><span class="secnum">8.2.4</span> SetDefaultGlobalBindings ( <var>realmRec</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-execution-contexts" title="Execution Contexts"><span class="secnum">8.3</span> Execution Contexts</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-getactivescriptormodule" title="GetActiveScriptOrModule ( )"><span class="secnum">8.3.1</span> GetActiveScriptOrModule ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-resolvebinding" title="ResolveBinding ( name [ , env ] )"><span class="secnum">8.3.2</span> ResolveBinding ( <var>name</var> [ , <var>env</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getthisenvironment" title="GetThisEnvironment ( )"><span class="secnum">8.3.3</span> GetThisEnvironment ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-resolvethisbinding" title="ResolveThisBinding ( )"><span class="secnum">8.3.4</span> ResolveThisBinding ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getnewtarget" title="GetNewTarget ( )"><span class="secnum">8.3.5</span> GetNewTarget ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getglobalobject" title="GetGlobalObject ( )"><span class="secnum">8.3.6</span> GetGlobalObject ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-jobs" title="Jobs and Host Operations to Enqueue Jobs"><span class="secnum">8.4</span> Jobs and Host Operations to Enqueue Jobs</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-jobcallback-records" title="JobCallback Records"><span class="secnum">8.4.1</span> JobCallback Records</a></li><li><span class="item-toggle-none"></span><a href="#sec-hostmakejobcallback" title="HostMakeJobCallback ( callback )"><span class="secnum">8.4.2</span> HostMakeJobCallback ( <var>callback</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hostcalljobcallback" title="HostCallJobCallback ( jobCallback, V, argumentsList )"><span class="secnum">8.4.3</span> HostCallJobCallback ( <var>jobCallback</var>, <var>V</var>, <var>argumentsList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hostenqueuepromisejob" title="HostEnqueuePromiseJob ( job, realm )"><span class="secnum">8.4.4</span> HostEnqueuePromiseJob ( <var>job</var>, <var>realm</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-initializehostdefinedrealm" title="InitializeHostDefinedRealm ( )"><span class="secnum">8.5</span> InitializeHostDefinedRealm ( )</a></li><li><span class="item-toggle">◢</span><a href="#sec-agents" title="Agents"><span class="secnum">8.6</span> Agents</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-agentsignifier" title="AgentSignifier ( )"><span class="secnum">8.6.1</span> AgentSignifier ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-agentcansuspend" title="AgentCanSuspend ( )"><span class="secnum">8.6.2</span> AgentCanSuspend ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-agent-clusters" title="Agent Clusters"><span class="secnum">8.7</span> Agent Clusters</a></li><li><span class="item-toggle-none"></span><a href="#sec-forward-progress" title="Forward Progress"><span class="secnum">8.8</span> Forward Progress</a></li><li><span class="item-toggle">◢</span><a href="#sec-weakref-processing-model" title="Processing Model of WeakRef and FinalizationRegistry Objects"><span class="secnum">8.9</span> Processing Model of WeakRef and FinalizationRegistry Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-weakref-invariants" title="Objectives"><span class="secnum">8.9.1</span> Objectives</a></li><li><span class="item-toggle-none"></span><a href="#sec-liveness" title="Liveness"><span class="secnum">8.9.2</span> Liveness</a></li><li><span class="item-toggle-none"></span><a href="#sec-weakref-execution" title="Execution"><span class="secnum">8.9.3</span> Execution</a></li><li><span class="item-toggle">◢</span><a href="#sec-weakref-host-hooks" title="Host Hooks"><span class="secnum">8.9.4</span> Host Hooks</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-host-cleanup-finalization-registry" title="HostEnqueueFinalizationRegistryCleanupJob ( finalizationRegistry )"><span class="secnum">8.9.4.1</span> HostEnqueueFinalizationRegistryCleanupJob ( <var>finalizationRegistry</var> )</a></li></ol></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-clear-kept-objects" title="ClearKeptObjects ( )"><span class="secnum">8.10</span> ClearKeptObjects ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-addtokeptobjects" title="AddToKeptObjects ( object )"><span class="secnum">8.11</span> AddToKeptObjects ( <var>object</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-cleanup-finalization-registry" title="CleanupFinalizationRegistry ( finalizationRegistry )"><span class="secnum">8.12</span> CleanupFinalizationRegistry ( <var>finalizationRegistry</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ordinary-and-exotic-objects-behaviours" title="Ordinary and Exotic Objects Behaviours"><span class="secnum">9</span> Ordinary and Exotic Objects Behaviours</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots" title="Ordinary Object Internal Methods and Internal Slots"><span class="secnum">9.1</span> Ordinary Object Internal Methods and Internal Slots</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots-getprototypeof" title="[[GetPrototypeOf]] ( )"><span class="secnum">9.1.1</span> [[GetPrototypeOf]] ( )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinarygetprototypeof" title="OrdinaryGetPrototypeOf ( O )"><span class="secnum">9.1.1.1</span> OrdinaryGetPrototypeOf ( <var>O</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots-setprototypeof-v" title="[[SetPrototypeOf]] ( V )"><span class="secnum">9.1.2</span> [[SetPrototypeOf]] ( <var>V</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinarysetprototypeof" title="OrdinarySetPrototypeOf ( O, V )"><span class="secnum">9.1.2.1</span> OrdinarySetPrototypeOf ( <var>O</var>, <var>V</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots-isextensible" title="[[IsExtensible]] ( )"><span class="secnum">9.1.3</span> [[IsExtensible]] ( )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinaryisextensible" title="OrdinaryIsExtensible ( O )"><span class="secnum">9.1.3.1</span> OrdinaryIsExtensible ( <var>O</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots-preventextensions" title="[[PreventExtensions]] ( )"><span class="secnum">9.1.4</span> [[PreventExtensions]] ( )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinarypreventextensions" title="OrdinaryPreventExtensions ( O )"><span class="secnum">9.1.4.1</span> OrdinaryPreventExtensions ( <var>O</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots-getownproperty-p" title="[[GetOwnProperty]] ( P )"><span class="secnum">9.1.5</span> [[GetOwnProperty]] ( <var>P</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinarygetownproperty" title="OrdinaryGetOwnProperty ( O, P )"><span class="secnum">9.1.5.1</span> OrdinaryGetOwnProperty ( <var>O</var>, <var>P</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots-defineownproperty-p-desc" title="[[DefineOwnProperty]] ( P, Desc )"><span class="secnum">9.1.6</span> [[DefineOwnProperty]] ( <var>P</var>, <var>Desc</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinarydefineownproperty" title="OrdinaryDefineOwnProperty ( O, P, Desc )"><span class="secnum">9.1.6.1</span> OrdinaryDefineOwnProperty ( <var>O</var>, <var>P</var>, <var>Desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-iscompatiblepropertydescriptor" title="IsCompatiblePropertyDescriptor ( Extensible, Desc, Current )"><span class="secnum">9.1.6.2</span> IsCompatiblePropertyDescriptor ( <var>Extensible</var>, <var>Desc</var>, <var>Current</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-validateandapplypropertydescriptor" title="ValidateAndApplyPropertyDescriptor ( O, P, extensible, Desc, current )"><span class="secnum">9.1.6.3</span> ValidateAndApplyPropertyDescriptor ( <var>O</var>, <var>P</var>, <var>extensible</var>, <var>Desc</var>, <var>current</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots-hasproperty-p" title="[[HasProperty]] ( P )"><span class="secnum">9.1.7</span> [[HasProperty]] ( <var>P</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinaryhasproperty" title="OrdinaryHasProperty ( O, P )"><span class="secnum">9.1.7.1</span> OrdinaryHasProperty ( <var>O</var>, <var>P</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots-get-p-receiver" title="[[Get]] ( P, Receiver )"><span class="secnum">9.1.8</span> [[Get]] ( <var>P</var>, <var>Receiver</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinaryget" title="OrdinaryGet ( O, P, Receiver )"><span class="secnum">9.1.8.1</span> OrdinaryGet ( <var>O</var>, <var>P</var>, <var>Receiver</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots-set-p-v-receiver" title="[[Set]] ( P, V, Receiver )"><span class="secnum">9.1.9</span> [[Set]] ( <var>P</var>, <var>V</var>, <var>Receiver</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinaryset" title="OrdinarySet ( O, P, V, Receiver )"><span class="secnum">9.1.9.1</span> OrdinarySet ( <var>O</var>, <var>P</var>, <var>V</var>, <var>Receiver</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-ordinarysetwithowndescriptor" title="OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )"><span class="secnum">9.1.9.2</span> OrdinarySetWithOwnDescriptor ( <var>O</var>, <var>P</var>, <var>V</var>, <var>Receiver</var>, <var>ownDesc</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots-delete-p" title="[[Delete]] ( P )"><span class="secnum">9.1.10</span> [[Delete]] ( <var>P</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinarydelete" title="OrdinaryDelete ( O, P )"><span class="secnum">9.1.10.1</span> OrdinaryDelete ( <var>O</var>, <var>P</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ordinary-object-internal-methods-and-internal-slots-ownpropertykeys" title="[[OwnPropertyKeys]] ( )"><span class="secnum">9.1.11</span> [[OwnPropertyKeys]] ( )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ordinaryownpropertykeys" title="OrdinaryOwnPropertyKeys ( O )"><span class="secnum">9.1.11.1</span> OrdinaryOwnPropertyKeys ( <var>O</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-ordinaryobjectcreate" title="OrdinaryObjectCreate ( proto [ , additionalInternalSlotsList ] )"><span class="secnum">9.1.12</span> OrdinaryObjectCreate ( <var>proto</var> [ , <var>additionalInternalSlotsList</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-ordinarycreatefromconstructor" title="OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] )"><span class="secnum">9.1.13</span> OrdinaryCreateFromConstructor ( <var>constructor</var>, <var>intrinsicDefaultProto</var> [ , <var>internalSlotsList</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getprototypefromconstructor" title="GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )"><span class="secnum">9.1.14</span> GetPrototypeFromConstructor ( <var>constructor</var>, <var>intrinsicDefaultProto</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-requireinternalslot" title="RequireInternalSlot ( O, internalSlot )"><span class="secnum">9.1.15</span> RequireInternalSlot ( <var>O</var>, <var>internalSlot</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-function-objects" title="ECMAScript Function Objects"><span class="secnum">9.2</span> ECMAScript Function Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-function-objects-call-thisargument-argumentslist" title="[[Call]] ( thisArgument, argumentsList )"><span class="secnum">9.2.1</span> [[Call]] ( <var>thisArgument</var>, <var>argumentsList</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-prepareforordinarycall" title="PrepareForOrdinaryCall ( F, newTarget )"><span class="secnum">9.2.1.1</span> PrepareForOrdinaryCall ( <var>F</var>, <var>newTarget</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-ordinarycallbindthis" title="OrdinaryCallBindThis ( F, calleeContext, thisArgument )"><span class="secnum">9.2.1.2</span> OrdinaryCallBindThis ( <var>F</var>, <var>calleeContext</var>, <var>thisArgument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-ordinarycallevaluatebody" title="OrdinaryCallEvaluateBody ( F, argumentsList )"><span class="secnum">9.2.1.3</span> OrdinaryCallEvaluateBody ( <var>F</var>, <var>argumentsList</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-ecmascript-function-objects-construct-argumentslist-newtarget" title="[[Construct]] ( argumentsList, newTarget )"><span class="secnum">9.2.2</span> [[Construct]] ( <var>argumentsList</var>, <var>newTarget</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-ordinaryfunctioncreate" title="OrdinaryFunctionCreate ( functionPrototype, sourceText, ParameterList, Body, thisMode, Scope )"><span class="secnum">9.2.3</span> OrdinaryFunctionCreate ( <var>functionPrototype</var>, <var>sourceText</var>, <var>ParameterList</var>, <var>Body</var>, <var>thisMode</var>, <var>Scope</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-addrestrictedfunctionproperties" title="AddRestrictedFunctionProperties ( F, realm )"><span class="secnum">9.2.4</span> AddRestrictedFunctionProperties ( <var>F</var>, <var>realm</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%throwtypeerror%" title="%ThrowTypeError% ( )"><span class="secnum">9.2.4.1</span> %ThrowTypeError% ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-makeconstructor" title="MakeConstructor ( F [ , writablePrototype [ , prototype ] ] )"><span class="secnum">9.2.5</span> MakeConstructor ( <var>F</var> [ , <var>writablePrototype</var> [ , <var>prototype</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-makeclassconstructor" title="MakeClassConstructor ( F )"><span class="secnum">9.2.6</span> MakeClassConstructor ( <var>F</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-makemethod" title="MakeMethod ( F, homeObject )"><span class="secnum">9.2.7</span> MakeMethod ( <var>F</var>, <var>homeObject</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-setfunctionname" title="SetFunctionName ( F, name [ , prefix ] )"><span class="secnum">9.2.8</span> SetFunctionName ( <var>F</var>, <var>name</var> [ , <var>prefix</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-setfunctionlength" title="SetFunctionLength ( F, length )"><span class="secnum">9.2.9</span> SetFunctionLength ( <var>F</var>, <var>length</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-functiondeclarationinstantiation" title="FunctionDeclarationInstantiation ( func, argumentsList )"><span class="secnum">9.2.10</span> FunctionDeclarationInstantiation ( <var>func</var>, <var>argumentsList</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-built-in-function-objects" title="Built-in Function Objects"><span class="secnum">9.3</span> Built-in Function Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-built-in-function-objects-call-thisargument-argumentslist" title="[[Call]] ( thisArgument, argumentsList )"><span class="secnum">9.3.1</span> [[Call]] ( <var>thisArgument</var>, <var>argumentsList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-built-in-function-objects-construct-argumentslist-newtarget" title="[[Construct]] ( argumentsList, newTarget )"><span class="secnum">9.3.2</span> [[Construct]] ( <var>argumentsList</var>, <var>newTarget</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createbuiltinfunction" title="CreateBuiltinFunction ( steps, internalSlotsList [ , realm [ , prototype ] ] )"><span class="secnum">9.3.3</span> CreateBuiltinFunction ( <var>steps</var>, <var>internalSlotsList</var> [ , <var>realm</var> [ , <var>prototype</var> ] ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-built-in-exotic-object-internal-methods-and-slots" title="Built-in Exotic Object Internal Methods and Slots"><span class="secnum">9.4</span> Built-in Exotic Object Internal Methods and Slots</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-bound-function-exotic-objects" title="Bound Function Exotic Objects"><span class="secnum">9.4.1</span> Bound Function Exotic Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-bound-function-exotic-objects-call-thisargument-argumentslist" title="[[Call]] ( thisArgument, argumentsList )"><span class="secnum">9.4.1.1</span> [[Call]] ( <var>thisArgument</var>, <var>argumentsList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-bound-function-exotic-objects-construct-argumentslist-newtarget" title="[[Construct]] ( argumentsList, newTarget )"><span class="secnum">9.4.1.2</span> [[Construct]] ( <var>argumentsList</var>, <var>newTarget</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-boundfunctioncreate" title="BoundFunctionCreate ( targetFunction, boundThis, boundArgs )"><span class="secnum">9.4.1.3</span> BoundFunctionCreate ( <var>targetFunction</var>, <var>boundThis</var>, <var>boundArgs</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-array-exotic-objects" title="Array Exotic Objects"><span class="secnum">9.4.2</span> Array Exotic Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-array-exotic-objects-defineownproperty-p-desc" title="[[DefineOwnProperty]] ( P, Desc )"><span class="secnum">9.4.2.1</span> [[DefineOwnProperty]] ( <var>P</var>, <var>Desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-arraycreate" title="ArrayCreate ( length [ , proto ] )"><span class="secnum">9.4.2.2</span> ArrayCreate ( <var>length</var> [ , <var>proto</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrayspeciescreate" title="ArraySpeciesCreate ( originalArray, length )"><span class="secnum">9.4.2.3</span> ArraySpeciesCreate ( <var>originalArray</var>, <var>length</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-arraysetlength" title="ArraySetLength ( A, Desc )"><span class="secnum">9.4.2.4</span> ArraySetLength ( <var>A</var>, <var>Desc</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-string-exotic-objects" title="String Exotic Objects"><span class="secnum">9.4.3</span> String Exotic Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-string-exotic-objects-getownproperty-p" title="[[GetOwnProperty]] ( P )"><span class="secnum">9.4.3.1</span> [[GetOwnProperty]] ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string-exotic-objects-defineownproperty-p-desc" title="[[DefineOwnProperty]] ( P, Desc )"><span class="secnum">9.4.3.2</span> [[DefineOwnProperty]] ( <var>P</var>, <var>Desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string-exotic-objects-ownpropertykeys" title="[[OwnPropertyKeys]] ( )"><span class="secnum">9.4.3.3</span> [[OwnPropertyKeys]] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-stringcreate" title="StringCreate ( value, prototype )"><span class="secnum">9.4.3.4</span> StringCreate ( <var>value</var>, <var>prototype</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-stringgetownproperty" title="StringGetOwnProperty ( S, P )"><span class="secnum">9.4.3.5</span> StringGetOwnProperty ( <var>S</var>, <var>P</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-arguments-exotic-objects" title="Arguments Exotic Objects"><span class="secnum">9.4.4</span> Arguments Exotic Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-arguments-exotic-objects-getownproperty-p" title="[[GetOwnProperty]] ( P )"><span class="secnum">9.4.4.1</span> [[GetOwnProperty]] ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-arguments-exotic-objects-defineownproperty-p-desc" title="[[DefineOwnProperty]] ( P, Desc )"><span class="secnum">9.4.4.2</span> [[DefineOwnProperty]] ( <var>P</var>, <var>Desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-arguments-exotic-objects-get-p-receiver" title="[[Get]] ( P, Receiver )"><span class="secnum">9.4.4.3</span> [[Get]] ( <var>P</var>, <var>Receiver</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-arguments-exotic-objects-set-p-v-receiver" title="[[Set]] ( P, V, Receiver )"><span class="secnum">9.4.4.4</span> [[Set]] ( <var>P</var>, <var>V</var>, <var>Receiver</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-arguments-exotic-objects-delete-p" title="[[Delete]] ( P )"><span class="secnum">9.4.4.5</span> [[Delete]] ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createunmappedargumentsobject" title="CreateUnmappedArgumentsObject ( argumentsList )"><span class="secnum">9.4.4.6</span> CreateUnmappedArgumentsObject ( <var>argumentsList</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-createmappedargumentsobject" title="CreateMappedArgumentsObject ( func, formals, argumentsList, env )"><span class="secnum">9.4.4.7</span> CreateMappedArgumentsObject ( <var>func</var>, <var>formals</var>, <var>argumentsList</var>, <var>env</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-makearggetter" title="MakeArgGetter ( name, env )"><span class="secnum">9.4.4.7.1</span> MakeArgGetter ( <var>name</var>, <var>env</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-makeargsetter" title="MakeArgSetter ( name, env )"><span class="secnum">9.4.4.7.2</span> MakeArgSetter ( <var>name</var>, <var>env</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-integer-indexed-exotic-objects" title="Integer-Indexed Exotic Objects"><span class="secnum">9.4.5</span> Integer-Indexed Exotic Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-integer-indexed-exotic-objects-getownproperty-p" title="[[GetOwnProperty]] ( P )"><span class="secnum">9.4.5.1</span> [[GetOwnProperty]] ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-integer-indexed-exotic-objects-hasproperty-p" title="[[HasProperty]] ( P )"><span class="secnum">9.4.5.2</span> [[HasProperty]] ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-integer-indexed-exotic-objects-defineownproperty-p-desc" title="[[DefineOwnProperty]] ( P, Desc )"><span class="secnum">9.4.5.3</span> [[DefineOwnProperty]] ( <var>P</var>, <var>Desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-integer-indexed-exotic-objects-get-p-receiver" title="[[Get]] ( P, Receiver )"><span class="secnum">9.4.5.4</span> [[Get]] ( <var>P</var>, <var>Receiver</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-integer-indexed-exotic-objects-set-p-v-receiver" title="[[Set]] ( P, V, Receiver )"><span class="secnum">9.4.5.5</span> [[Set]] ( <var>P</var>, <var>V</var>, <var>Receiver</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-integer-indexed-exotic-objects-ownpropertykeys" title="[[OwnPropertyKeys]] ( )"><span class="secnum">9.4.5.6</span> [[OwnPropertyKeys]] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-integerindexedobjectcreate" title="IntegerIndexedObjectCreate ( prototype )"><span class="secnum">9.4.5.7</span> IntegerIndexedObjectCreate ( <var>prototype</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isvalidintegerindex" title="IsValidIntegerIndex ( O, index )"><span class="secnum">9.4.5.8</span> IsValidIntegerIndex ( <var>O</var>, <var>index</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-integerindexedelementget" title="IntegerIndexedElementGet ( O, index )"><span class="secnum">9.4.5.9</span> IntegerIndexedElementGet ( <var>O</var>, <var>index</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-integerindexedelementset" title="IntegerIndexedElementSet ( O, index, value )"><span class="secnum">9.4.5.10</span> IntegerIndexedElementSet ( <var>O</var>, <var>index</var>, <var>value</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-module-namespace-exotic-objects" title="Module Namespace Exotic Objects"><span class="secnum">9.4.6</span> Module Namespace Exotic Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-module-namespace-exotic-objects-setprototypeof-v" title="[[SetPrototypeOf]] ( V )"><span class="secnum">9.4.6.1</span> [[SetPrototypeOf]] ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-namespace-exotic-objects-isextensible" title="[[IsExtensible]] ( )"><span class="secnum">9.4.6.2</span> [[IsExtensible]] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-namespace-exotic-objects-preventextensions" title="[[PreventExtensions]] ( )"><span class="secnum">9.4.6.3</span> [[PreventExtensions]] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-namespace-exotic-objects-getownproperty-p" title="[[GetOwnProperty]] ( P )"><span class="secnum">9.4.6.4</span> [[GetOwnProperty]] ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-namespace-exotic-objects-defineownproperty-p-desc" title="[[DefineOwnProperty]] ( P, Desc )"><span class="secnum">9.4.6.5</span> [[DefineOwnProperty]] ( <var>P</var>, <var>Desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-namespace-exotic-objects-hasproperty-p" title="[[HasProperty]] ( P )"><span class="secnum">9.4.6.6</span> [[HasProperty]] ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-namespace-exotic-objects-get-p-receiver" title="[[Get]] ( P, Receiver )"><span class="secnum">9.4.6.7</span> [[Get]] ( <var>P</var>, <var>Receiver</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-namespace-exotic-objects-set-p-v-receiver" title="[[Set]] ( P, V, Receiver )"><span class="secnum">9.4.6.8</span> [[Set]] ( <var>P</var>, <var>V</var>, <var>Receiver</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-namespace-exotic-objects-delete-p" title="[[Delete]] ( P )"><span class="secnum">9.4.6.9</span> [[Delete]] ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-namespace-exotic-objects-ownpropertykeys" title="[[OwnPropertyKeys]] ( )"><span class="secnum">9.4.6.10</span> [[OwnPropertyKeys]] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-modulenamespacecreate" title="ModuleNamespaceCreate ( module, exports )"><span class="secnum">9.4.6.11</span> ModuleNamespaceCreate ( <var>module</var>, <var>exports</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-immutable-prototype-exotic-objects" title="Immutable Prototype Exotic Objects"><span class="secnum">9.4.7</span> Immutable Prototype Exotic Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-immutable-prototype-exotic-objects-setprototypeof-v" title="[[SetPrototypeOf]] ( V )"><span class="secnum">9.4.7.1</span> [[SetPrototypeOf]] ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-set-immutable-prototype" title="SetImmutablePrototype ( O, V )"><span class="secnum">9.4.7.2</span> SetImmutablePrototype ( <var>O</var>, <var>V</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-proxy-object-internal-methods-and-internal-slots" title="Proxy Object Internal Methods and Internal Slots"><span class="secnum">9.5</span> Proxy Object Internal Methods and Internal Slots</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-getprototypeof" title="[[GetPrototypeOf]] ( )"><span class="secnum">9.5.1</span> [[GetPrototypeOf]] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-setprototypeof-v" title="[[SetPrototypeOf]] ( V )"><span class="secnum">9.5.2</span> [[SetPrototypeOf]] ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-isextensible" title="[[IsExtensible]] ( )"><span class="secnum">9.5.3</span> [[IsExtensible]] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-preventextensions" title="[[PreventExtensions]] ( )"><span class="secnum">9.5.4</span> [[PreventExtensions]] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-getownproperty-p" title="[[GetOwnProperty]] ( P )"><span class="secnum">9.5.5</span> [[GetOwnProperty]] ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-defineownproperty-p-desc" title="[[DefineOwnProperty]] ( P, Desc )"><span class="secnum">9.5.6</span> [[DefineOwnProperty]] ( <var>P</var>, <var>Desc</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-hasproperty-p" title="[[HasProperty]] ( P )"><span class="secnum">9.5.7</span> [[HasProperty]] ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-get-p-receiver" title="[[Get]] ( P, Receiver )"><span class="secnum">9.5.8</span> [[Get]] ( <var>P</var>, <var>Receiver</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-set-p-v-receiver" title="[[Set]] ( P, V, Receiver )"><span class="secnum">9.5.9</span> [[Set]] ( <var>P</var>, <var>V</var>, <var>Receiver</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-delete-p" title="[[Delete]] ( P )"><span class="secnum">9.5.10</span> [[Delete]] ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-ownpropertykeys" title="[[OwnPropertyKeys]] ( )"><span class="secnum">9.5.11</span> [[OwnPropertyKeys]] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-call-thisargument-argumentslist" title="[[Call]] ( thisArgument, argumentsList )"><span class="secnum">9.5.12</span> [[Call]] ( <var>thisArgument</var>, <var>argumentsList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxy-object-internal-methods-and-internal-slots-construct-argumentslist-newtarget" title="[[Construct]] ( argumentsList, newTarget )"><span class="secnum">9.5.13</span> [[Construct]] ( <var>argumentsList</var>, <var>newTarget</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-proxycreate" title="ProxyCreate ( target, handler )"><span class="secnum">9.5.14</span> ProxyCreate ( <var>target</var>, <var>handler</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-source-code" title="ECMAScript Language: Source Code"><span class="secnum">10</span> ECMAScript Language: Source Code</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-source-text" title="Source Text"><span class="secnum">10.1</span> Source Text</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-codepointtoutf16codeunits" title="Static Semantics: CodePointToUTF16CodeUnits ( cp )"><span class="secnum">10.1.1</span> SS: CodePointToUTF16CodeUnits ( <var>cp</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-codepointstostring" title="Static Semantics: CodePointsToString ( text )"><span class="secnum">10.1.2</span> SS: CodePointsToString ( <var>text</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-utf16decodesurrogatepair" title="Static Semantics: UTF16SurrogatePairToCodePoint ( lead, trail )"><span class="secnum">10.1.3</span> SS: UTF16SurrogatePairToCodePoint ( <var>lead</var>, <var>trail</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-codepointat" title="Static Semantics: CodePointAt ( string, position )"><span class="secnum">10.1.4</span> SS: CodePointAt ( <var>string</var>, <var>position</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-stringtocodepoints" title="Static Semantics: StringToCodePoints ( string )"><span class="secnum">10.1.5</span> SS: StringToCodePoints ( <var>string</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-types-of-source-code" title="Types of Source Code"><span class="secnum">10.2</span> Types of Source Code</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-strict-mode-code" title="Strict Mode Code"><span class="secnum">10.2.1</span> Strict Mode Code</a></li><li><span class="item-toggle-none"></span><a href="#sec-non-ecmascript-functions" title="Non-ECMAScript Functions"><span class="secnum">10.2.2</span> Non-ECMAScript Functions</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-lexical-grammar" title="ECMAScript Language: Lexical Grammar"><span class="secnum">11</span> ECMAScript Language: Lexical Grammar</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-unicode-format-control-characters" title="Unicode Format-Control Characters"><span class="secnum">11.1</span> Unicode Format-Control Characters</a></li><li><span class="item-toggle-none"></span><a href="#sec-white-space" title="White Space"><span class="secnum">11.2</span> White Space</a></li><li><span class="item-toggle-none"></span><a href="#sec-line-terminators" title="Line Terminators"><span class="secnum">11.3</span> Line Terminators</a></li><li><span class="item-toggle-none"></span><a href="#sec-comments" title="Comments"><span class="secnum">11.4</span> Comments</a></li><li><span class="item-toggle-none"></span><a href="#sec-tokens" title="Tokens"><span class="secnum">11.5</span> Tokens</a></li><li><span class="item-toggle">◢</span><a href="#sec-names-and-keywords" title="Names and Keywords"><span class="secnum">11.6</span> Names and Keywords</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-identifier-names" title="Identifier Names"><span class="secnum">11.6.1</span> Identifier Names</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-identifier-names-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">11.6.1.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-identifier-names-static-semantics-stringvalue" title="Static Semantics: StringValue"><span class="secnum">11.6.1.2</span> SS: StringValue</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-keywords-and-reserved-words" title="Keywords and Reserved Words"><span class="secnum">11.6.2</span> Keywords and Reserved Words</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-punctuators" title="Punctuators"><span class="secnum">11.7</span> Punctuators</a></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-lexical-grammar-literals" title="Literals"><span class="secnum">11.8</span> Literals</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-null-literals" title="Null Literals"><span class="secnum">11.8.1</span> Null Literals</a></li><li><span class="item-toggle-none"></span><a href="#sec-boolean-literals" title="Boolean Literals"><span class="secnum">11.8.2</span> Boolean Literals</a></li><li><span class="item-toggle">◢</span><a href="#sec-literals-numeric-literals" title="Numeric Literals"><span class="secnum">11.8.3</span> Numeric Literals</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-mv" title="Static Semantics: MV"><span class="secnum">11.8.3.1</span> SS: MV</a></li><li><span class="item-toggle-none"></span><a href="#sec-numericvalue" title="Static Semantics: NumericValue"><span class="secnum">11.8.3.2</span> SS: NumericValue</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-literals-string-literals" title="String Literals"><span class="secnum">11.8.4</span> String Literals</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-string-literals-static-semantics-stringvalue" title="Static Semantics: StringValue"><span class="secnum">11.8.4.1</span> SS: StringValue</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-sv" title="Static Semantics: SV"><span class="secnum">11.8.4.2</span> SS: SV</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-literals-regular-expression-literals" title="Regular Expression Literals"><span class="secnum">11.8.5</span> Regular Expression Literals</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-literals-regular-expression-literals-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">11.8.5.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-bodytext" title="Static Semantics: BodyText"><span class="secnum">11.8.5.2</span> SS: BodyText</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-flagtext" title="Static Semantics: FlagText"><span class="secnum">11.8.5.3</span> SS: FlagText</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-template-literal-lexical-components" title="Template Literal Lexical Components"><span class="secnum">11.8.6</span> Template Literal Lexical Components</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-tv-and-trv" title="Static Semantics: TV and TRV"><span class="secnum">11.8.6.1</span> SS: TV and TRV</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-automatic-semicolon-insertion" title="Automatic Semicolon Insertion"><span class="secnum">11.9</span> Automatic Semicolon Insertion</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-rules-of-automatic-semicolon-insertion" title="Rules of Automatic Semicolon Insertion"><span class="secnum">11.9.1</span> Rules of Automatic Semicolon Insertion</a></li><li><span class="item-toggle-none"></span><a href="#sec-examples-of-automatic-semicolon-insertion" title="Examples of Automatic Semicolon Insertion"><span class="secnum">11.9.2</span> Examples of Automatic Semicolon Insertion</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-interesting-cases-of-automatic-semicolon-insertion" title="Interesting Cases of Automatic Semicolon Insertion"><span class="secnum">11.10</span> Interesting Cases of Automatic Semicolon Insertion</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-asi-interesting-cases-in-statement-lists" title="Interesting Cases of Automatic Semicolon Insertion in Statement Lists"><span class="secnum">11.10.1</span> Interesting Cases of Automatic Semicolon Insertion in Statement Lists</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-asi-cases-with-no-lineterminator-here" title="Cases of Automatic Semicolon Insertion and “[no LineTerminator here]”"><span class="secnum">11.11</span> Cases of Automatic Semicolon Insertion and “[no <emu-nt>LineTerminator</emu-nt> here]”</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-no-lineterminator-here-automatic-semicolon-insertion-list" title="List of Grammar Productions with Optional Operands and “[no LineTerminator here]”"><span class="secnum">11.11.1</span> List of Grammar Productions with Optional Operands and “[no <emu-nt>LineTerminator</emu-nt> here]”</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-expressions" title="ECMAScript Language: Expressions"><span class="secnum">12</span> ECMAScript Language: Expressions</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-identifiers" title="Identifiers"><span class="secnum">12.1</span> Identifiers</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-identifiers-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">12.1.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-identifiers-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">12.1.2</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-identifiers-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.1.3</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle-none"></span><a href="#sec-identifiers-static-semantics-stringvalue" title="Static Semantics: StringValue"><span class="secnum">12.1.4</span> SS: StringValue</a></li><li><span class="item-toggle">◢</span><a href="#sec-identifiers-runtime-semantics-bindinginitialization" title="Runtime Semantics: BindingInitialization"><span class="secnum">12.1.5</span> RS: BindingInitialization</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-initializeboundname" title="InitializeBoundName ( name, value, environment )"><span class="secnum">12.1.5.1</span> InitializeBoundName ( <var>name</var>, <var>value</var>, <var>environment</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-identifiers-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.1.6</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-primary-expression" title="Primary Expression"><span class="secnum">12.2</span> Primary Expression</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-primary-expression-semantics" title="Semantics"><span class="secnum">12.2.1</span> Semantics</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-coveredparenthesizedexpression" title="Static Semantics: CoveredParenthesizedExpression"><span class="secnum">12.2.1.1</span> SS: CoveredParenthesizedExpression</a></li><li><span class="item-toggle-none"></span><a href="#sec-semantics-static-semantics-hasname" title="Static Semantics: HasName"><span class="secnum">12.2.1.2</span> SS: HasName</a></li><li><span class="item-toggle-none"></span><a href="#sec-semantics-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.2.1.3</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-semantics-static-semantics-isidentifierref" title="Static Semantics: IsIdentifierRef"><span class="secnum">12.2.1.4</span> SS: IsIdentifierRef</a></li><li><span class="item-toggle-none"></span><a href="#sec-semantics-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.2.1.5</span> SS: AssignmentTargetType</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-this-keyword" title="The this Keyword"><span class="secnum">12.2.2</span> The <code>this</code> Keyword</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-this-keyword-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.2.2.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-identifier-reference" title="Identifier Reference"><span class="secnum">12.2.3</span> Identifier Reference</a></li><li><span class="item-toggle">◢</span><a href="#sec-primary-expression-literals" title="Literals"><span class="secnum">12.2.4</span> Literals</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-literals-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.2.4.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-array-initializer" title="Array Initializer"><span class="secnum">12.2.5</span> Array Initializer</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-arrayaccumulation" title="Runtime Semantics: ArrayAccumulation"><span class="secnum">12.2.5.1</span> RS: ArrayAccumulation</a></li><li><span class="item-toggle-none"></span><a href="#sec-array-initializer-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.2.5.2</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-object-initializer" title="Object Initializer"><span class="secnum">12.2.6</span> Object Initializer</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-object-initializer-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">12.2.6.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-initializer-static-semantics-computedpropertycontains" title="Static Semantics: ComputedPropertyContains"><span class="secnum">12.2.6.2</span> SS: ComputedPropertyContains</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-initializer-static-semantics-contains" title="Static Semantics: Contains"><span class="secnum">12.2.6.3</span> SS: Contains</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-iscomputedpropertykey" title="Static Semantics: IsComputedPropertyKey"><span class="secnum">12.2.6.4</span> SS: IsComputedPropertyKey</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-initializer-static-semantics-propname" title="Static Semantics: PropName"><span class="secnum">12.2.6.5</span> SS: PropName</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-propertynamelist" title="Static Semantics: PropertyNameList"><span class="secnum">12.2.6.6</span> SS: PropertyNameList</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-initializer-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.2.6.7</span> RS: Evaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-object-initializer-runtime-semantics-propertydefinitionevaluation" title="Runtime Semantics: PropertyDefinitionEvaluation"><span class="secnum">12.2.6.8</span> RS: PropertyDefinitionEvaluation</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-function-defining-expressions" title="Function Defining Expressions"><span class="secnum">12.2.7</span> Function Defining Expressions</a></li><li><span class="item-toggle">◢</span><a href="#sec-primary-expression-regular-expression-literals" title="Regular Expression Literals"><span class="secnum">12.2.8</span> Regular Expression Literals</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-primary-expression-regular-expression-literals-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">12.2.8.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-isvalidregularexpressionliteral" title="Static Semantics: IsValidRegularExpressionLiteral ( literal )"><span class="secnum">12.2.8.2</span> SS: IsValidRegularExpressionLiteral ( <var>literal</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-regular-expression-literals-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.2.8.3</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-template-literals" title="Template Literals"><span class="secnum">12.2.9</span> Template Literals</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-template-early-errors" title="Static Semantics: Early Errors"><span class="secnum">12.2.9.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-templatestrings" title="Static Semantics: TemplateStrings"><span class="secnum">12.2.9.2</span> SS: TemplateStrings</a></li><li><span class="item-toggle-none"></span><a href="#sec-template-literals-runtime-semantics-argumentlistevaluation" title="Runtime Semantics: ArgumentListEvaluation"><span class="secnum">12.2.9.3</span> RS: ArgumentListEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-gettemplateobject" title="GetTemplateObject ( templateLiteral )"><span class="secnum">12.2.9.4</span> GetTemplateObject ( <var>templateLiteral</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-substitutionevaluation" title="Runtime Semantics: SubstitutionEvaluation"><span class="secnum">12.2.9.5</span> RS: SubstitutionEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-template-literals-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.2.9.6</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-grouping-operator" title="The Grouping Operator"><span class="secnum">12.2.10</span> The Grouping Operator</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-grouping-operator-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">12.2.10.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-grouping-operator-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.2.10.2</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-grouping-operator-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.2.10.3</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle-none"></span><a href="#sec-grouping-operator-runtime-semantics-namedevaluation" title="Runtime Semantics: NamedEvaluation"><span class="secnum">12.2.10.4</span> RS: NamedEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-grouping-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.2.10.5</span> RS: Evaluation</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-left-hand-side-expressions" title="Left-Hand-Side Expressions"><span class="secnum">12.3</span> Left-Hand-Side Expressions</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-static-semantics" title="Static Semantics"><span class="secnum">12.3.1</span> Static Semantics</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-left-hand-side-expressions-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">12.3.1.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-left-hand-side-expressions-static-semantics-coveredcallexpression" title="Static Semantics: CoveredCallExpression"><span class="secnum">12.3.1.2</span> SS: CoveredCallExpression</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-static-semantics-contains" title="Static Semantics: Contains"><span class="secnum">12.3.1.3</span> SS: Contains</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.3.1.4</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-static-semantics-isdestructuring" title="Static Semantics: IsDestructuring"><span class="secnum">12.3.1.5</span> SS: IsDestructuring</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-static-semantics-isidentifierref" title="Static Semantics: IsIdentifierRef"><span class="secnum">12.3.1.6</span> SS: IsIdentifierRef</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.3.1.7</span> SS: AssignmentTargetType</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-property-accessors" title="Property Accessors"><span class="secnum">12.3.2</span> Property Accessors</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-property-accessors-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.3.2.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-evaluate-property-access-with-expression-key" title="EvaluatePropertyAccessWithExpressionKey ( baseValue, expression, strict )"><span class="secnum">12.3.3</span> EvaluatePropertyAccessWithExpressionKey ( <var>baseValue</var>, <var>expression</var>, <var>strict</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-evaluate-property-access-with-identifier-key" title="EvaluatePropertyAccessWithIdentifierKey ( baseValue, identifierName, strict )"><span class="secnum">12.3.4</span> EvaluatePropertyAccessWithIdentifierKey ( <var>baseValue</var>, <var>identifierName</var>, <var>strict</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-new-operator" title="The new Operator"><span class="secnum">12.3.5</span> The <code>new</code> Operator</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-new-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.3.5.1</span> RS: Evaluation</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-evaluatenew" title="EvaluateNew ( constructExpr, arguments )"><span class="secnum">12.3.5.1.1</span> EvaluateNew ( <var>constructExpr</var>, <var>arguments</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-function-calls" title="Function Calls"><span class="secnum">12.3.6</span> Function Calls</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-function-calls-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.3.6.1</span> RS: Evaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-evaluatecall" title="EvaluateCall ( func, ref, arguments, tailPosition )"><span class="secnum">12.3.6.2</span> EvaluateCall ( <var>func</var>, <var>ref</var>, <var>arguments</var>, <var>tailPosition</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-super-keyword" title="The super Keyword"><span class="secnum">12.3.7</span> The <code>super</code> Keyword</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-super-keyword-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.3.7.1</span> RS: Evaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-getsuperconstructor" title="GetSuperConstructor ( )"><span class="secnum">12.3.7.2</span> GetSuperConstructor ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-makesuperpropertyreference" title="MakeSuperPropertyReference ( actualThis, propertyKey, strict )"><span class="secnum">12.3.7.3</span> MakeSuperPropertyReference ( <var>actualThis</var>, <var>propertyKey</var>, <var>strict</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-argument-lists" title="Argument Lists"><span class="secnum">12.3.8</span> Argument Lists</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-argument-lists-runtime-semantics-argumentlistevaluation" title="Runtime Semantics: ArgumentListEvaluation"><span class="secnum">12.3.8.1</span> RS: ArgumentListEvaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-optional-chains" title="Optional Chains"><span class="secnum">12.3.9</span> Optional Chains</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-optional-chaining-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.3.9.1</span> RS: Evaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-optional-chaining-chain-evaluation" title="Runtime Semantics: ChainEvaluation"><span class="secnum">12.3.9.2</span> RS: ChainEvaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-import-calls" title="Import Calls"><span class="secnum">12.3.10</span> Import Calls</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-import-call-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.3.10.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-tagged-templates" title="Tagged Templates"><span class="secnum">12.3.11</span> Tagged Templates</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-tagged-templates-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.3.11.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-meta-properties" title="Meta Properties"><span class="secnum">12.3.12</span> Meta Properties</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-meta-properties-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.3.12.1</span> RS: Evaluation</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-hostgetimportmetaproperties" title="HostGetImportMetaProperties ( moduleRecord )"><span class="secnum">12.3.12.1.1</span> HostGetImportMetaProperties ( <var>moduleRecord</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hostfinalizeimportmeta" title="HostFinalizeImportMeta ( importMeta, moduleRecord )"><span class="secnum">12.3.12.1.2</span> HostFinalizeImportMeta ( <var>importMeta</var>, <var>moduleRecord</var> )</a></li></ol></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-update-expressions" title="Update Expressions"><span class="secnum">12.4</span> Update Expressions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-update-expressions-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">12.4.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-update-expressions-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.4.2</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-update-expressions-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.4.3</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle">◢</span><a href="#sec-postfix-increment-operator" title="Postfix Increment Operator"><span class="secnum">12.4.4</span> Postfix Increment Operator</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-postfix-increment-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.4.4.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-postfix-decrement-operator" title="Postfix Decrement Operator"><span class="secnum">12.4.5</span> Postfix Decrement Operator</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-postfix-decrement-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.4.5.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-prefix-increment-operator" title="Prefix Increment Operator"><span class="secnum">12.4.6</span> Prefix Increment Operator</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-prefix-increment-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.4.6.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-prefix-decrement-operator" title="Prefix Decrement Operator"><span class="secnum">12.4.7</span> Prefix Decrement Operator</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-prefix-decrement-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.4.7.1</span> RS: Evaluation</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-unary-operators" title="Unary Operators"><span class="secnum">12.5</span> Unary Operators</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-unary-operators-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.5.1</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-unary-operators-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.5.2</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle">◢</span><a href="#sec-delete-operator" title="The delete Operator"><span class="secnum">12.5.3</span> The <code>delete</code> Operator</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-delete-operator-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">12.5.3.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-delete-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.5.3.2</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-void-operator" title="The void Operator"><span class="secnum">12.5.4</span> The <code>void</code> Operator</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-void-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.5.4.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-typeof-operator" title="The typeof Operator"><span class="secnum">12.5.5</span> The <code>typeof</code> Operator</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-typeof-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.5.5.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-unary-plus-operator" title="Unary + Operator"><span class="secnum">12.5.6</span> Unary <code>+</code> Operator</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-unary-plus-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.5.6.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-unary-minus-operator" title="Unary - Operator"><span class="secnum">12.5.7</span> Unary <code>-</code> Operator</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-unary-minus-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.5.7.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-bitwise-not-operator" title="Bitwise NOT Operator ( ~ )"><span class="secnum">12.5.8</span> Bitwise NOT Operator ( <code>~</code> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-bitwise-not-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.5.8.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-logical-not-operator" title="Logical NOT Operator ( ! )"><span class="secnum">12.5.9</span> Logical NOT Operator ( <code>!</code> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-logical-not-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.5.9.1</span> RS: Evaluation</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-exp-operator" title="Exponentiation Operator"><span class="secnum">12.6</span> Exponentiation Operator</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-exp-operator-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.6.1</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-exp-operator-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.6.2</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle-none"></span><a href="#sec-exp-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.6.3</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-multiplicative-operators" title="Multiplicative Operators"><span class="secnum">12.7</span> Multiplicative Operators</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-multiplicative-operators-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.7.1</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-multiplicative-operators-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.7.2</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle-none"></span><a href="#sec-multiplicative-operators-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.7.3</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-additive-operators" title="Additive Operators"><span class="secnum">12.8</span> Additive Operators</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-additive-operators-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.8.1</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-additive-operators-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.8.2</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle">◢</span><a href="#sec-addition-operator-plus" title="The Addition Operator ( + )"><span class="secnum">12.8.3</span> The Addition Operator ( <code>+</code> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-addition-operator-plus-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.8.3.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-subtraction-operator-minus" title="The Subtraction Operator ( - )"><span class="secnum">12.8.4</span> The Subtraction Operator ( <code>-</code> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-subtraction-operator-minus-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.8.4.1</span> RS: Evaluation</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-bitwise-shift-operators" title="Bitwise Shift Operators"><span class="secnum">12.9</span> Bitwise Shift Operators</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-bitwise-shift-operators-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.9.1</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-bitwise-shift-operators-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.9.2</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle">◢</span><a href="#sec-left-shift-operator" title="The Left Shift Operator ( << )"><span class="secnum">12.9.3</span> The Left Shift Operator ( <code>&lt;&lt;</code> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-left-shift-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.9.3.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-signed-right-shift-operator" title="The Signed Right Shift Operator ( >> )"><span class="secnum">12.9.4</span> The Signed Right Shift Operator ( <code>&gt;&gt;</code> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-signed-right-shift-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.9.4.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-unsigned-right-shift-operator" title="The Unsigned Right Shift Operator ( >>> )"><span class="secnum">12.9.5</span> The Unsigned Right Shift Operator ( <code>&gt;&gt;&gt;</code> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-unsigned-right-shift-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.9.5.1</span> RS: Evaluation</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-relational-operators" title="Relational Operators"><span class="secnum">12.10</span> Relational Operators</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-relational-operators-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.10.1</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-relational-operators-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.10.2</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle-none"></span><a href="#sec-relational-operators-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.10.3</span> RS: Evaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-instanceofoperator" title="InstanceofOperator ( V, target )"><span class="secnum">12.10.4</span> InstanceofOperator ( <var>V</var>, <var>target</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-equality-operators" title="Equality Operators"><span class="secnum">12.11</span> Equality Operators</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-equality-operators-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.11.1</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-equality-operators-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.11.2</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle-none"></span><a href="#sec-equality-operators-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.11.3</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-binary-bitwise-operators" title="Binary Bitwise Operators"><span class="secnum">12.12</span> Binary Bitwise Operators</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-binary-bitwise-operators-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.12.1</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-binary-bitwise-operators-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.12.2</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle-none"></span><a href="#sec-binary-bitwise-operators-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.12.3</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-binary-logical-operators" title="Binary Logical Operators"><span class="secnum">12.13</span> Binary Logical Operators</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-binary-logical-operators-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.13.1</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-binary-logical-operators-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.13.2</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle-none"></span><a href="#sec-binary-logical-operators-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.13.3</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-conditional-operator" title="Conditional Operator ( ? : )"><span class="secnum">12.14</span> Conditional Operator ( <code>? :</code> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-conditional-operator-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.14.1</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-conditional-operator-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.14.2</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle-none"></span><a href="#sec-conditional-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.14.3</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-assignment-operators" title="Assignment Operators"><span class="secnum">12.15</span> Assignment Operators</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-assignment-operators-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">12.15.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-assignment-operators-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.15.2</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-assignment-operators-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.15.3</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle-none"></span><a href="#sec-assignment-operators-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.15.4</span> RS: Evaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-applystringornumericbinaryoperator" title="ApplyStringOrNumericBinaryOperator ( lval, opText, rval )"><span class="secnum">12.15.5</span> ApplyStringOrNumericBinaryOperator ( <var>lval</var>, <var>opText</var>, <var>rval</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-evaluatestringornumericbinaryexpression" title="EvaluateStringOrNumericBinaryExpression ( leftOperand, opText, rightOperand )"><span class="secnum">12.15.6</span> EvaluateStringOrNumericBinaryExpression ( <var>leftOperand</var>, <var>opText</var>, <var>rightOperand</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-destructuring-assignment" title="Destructuring Assignment"><span class="secnum">12.15.7</span> Destructuring Assignment</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-destructuring-assignment-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">12.15.7.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-destructuringassignmentevaluation" title="Runtime Semantics: DestructuringAssignmentEvaluation"><span class="secnum">12.15.7.2</span> RS: DestructuringAssignmentEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-propertydestructuringassignmentevaluation" title="Runtime Semantics: PropertyDestructuringAssignmentEvaluation"><span class="secnum">12.15.7.3</span> RS: PropertyDestructuringAssignmentEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-restdestructuringassignmentevaluation" title="Runtime Semantics: RestDestructuringAssignmentEvaluation"><span class="secnum">12.15.7.4</span> RS: RestDestructuringAssignmentEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-iteratordestructuringassignmentevaluation" title="Runtime Semantics: IteratorDestructuringAssignmentEvaluation"><span class="secnum">12.15.7.5</span> RS: IteratorDestructuringAssignmentEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-keyeddestructuringassignmentevaluation" title="Runtime Semantics: KeyedDestructuringAssignmentEvaluation"><span class="secnum">12.15.7.6</span> RS: KeyedDestructuringAssignmentEvaluation</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-comma-operator" title="Comma Operator ( , )"><span class="secnum">12.16</span> Comma Operator ( <code>,</code> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-comma-operator-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">12.16.1</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-comma-operator-static-semantics-assignmenttargettype" title="Static Semantics: AssignmentTargetType"><span class="secnum">12.16.2</span> SS: AssignmentTargetType</a></li><li><span class="item-toggle-none"></span><a href="#sec-comma-operator-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">12.16.3</span> RS: Evaluation</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-statements-and-declarations" title="ECMAScript Language: Statements and Declarations"><span class="secnum">13</span> ECMAScript Language: Statements and Declarations</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-statement-semantics" title="Statement Semantics"><span class="secnum">13.1</span> Statement Semantics</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-statement-semantics-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">13.1.1</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-statement-semantics-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.1.2</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-statement-semantics-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.1.3</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-declarationpart" title="Static Semantics: DeclarationPart"><span class="secnum">13.1.4</span> SS: DeclarationPart</a></li><li><span class="item-toggle-none"></span><a href="#sec-statement-semantics-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.1.5</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-statement-semantics-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.1.6</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-statement-semantics-runtime-semantics-labelledevaluation" title="Runtime Semantics: LabelledEvaluation"><span class="secnum">13.1.7</span> RS: LabelledEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-statement-semantics-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.1.8</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-block" title="Block"><span class="secnum">13.2</span> Block</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.2.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">13.2.2</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.2.3</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.2.4</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-lexicallydeclarednames" title="Static Semantics: LexicallyDeclaredNames"><span class="secnum">13.2.5</span> SS: LexicallyDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-lexicallyscopeddeclarations" title="Static Semantics: LexicallyScopedDeclarations"><span class="secnum">13.2.6</span> SS: LexicallyScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-toplevellexicallydeclarednames" title="Static Semantics: TopLevelLexicallyDeclaredNames"><span class="secnum">13.2.7</span> SS: TopLevelLexicallyDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-toplevellexicallyscopeddeclarations" title="Static Semantics: TopLevelLexicallyScopedDeclarations"><span class="secnum">13.2.8</span> SS: TopLevelLexicallyScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-toplevelvardeclarednames" title="Static Semantics: TopLevelVarDeclaredNames"><span class="secnum">13.2.9</span> SS: TopLevelVarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-toplevelvarscopeddeclarations" title="Static Semantics: TopLevelVarScopedDeclarations"><span class="secnum">13.2.10</span> SS: TopLevelVarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.2.11</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.2.12</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.2.13</span> RS: Evaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-blockdeclarationinstantiation" title="BlockDeclarationInstantiation ( code, env )"><span class="secnum">13.2.14</span> BlockDeclarationInstantiation ( <var>code</var>, <var>env</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-declarations-and-the-variable-statement" title="Declarations and the Variable Statement"><span class="secnum">13.3</span> Declarations and the Variable Statement</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-let-and-const-declarations" title="Let and Const Declarations"><span class="secnum">13.3.1</span> Let and Const Declarations</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-let-and-const-declarations-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.3.1.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-let-and-const-declarations-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">13.3.1.2</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-let-and-const-declarations-static-semantics-isconstantdeclaration" title="Static Semantics: IsConstantDeclaration"><span class="secnum">13.3.1.3</span> SS: IsConstantDeclaration</a></li><li><span class="item-toggle-none"></span><a href="#sec-let-and-const-declarations-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.3.1.4</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-variable-statement" title="Variable Statement"><span class="secnum">13.3.2</span> Variable Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-variable-statement-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">13.3.2.1</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-variable-statement-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.3.2.2</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-variable-statement-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.3.2.3</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-variable-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.3.2.4</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-destructuring-binding-patterns" title="Destructuring Binding Patterns"><span class="secnum">13.3.3</span> Destructuring Binding Patterns</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-destructuring-binding-patterns-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">13.3.3.1</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-destructuring-binding-patterns-static-semantics-containsexpression" title="Static Semantics: ContainsExpression"><span class="secnum">13.3.3.2</span> SS: ContainsExpression</a></li><li><span class="item-toggle-none"></span><a href="#sec-destructuring-binding-patterns-static-semantics-hasinitializer" title="Static Semantics: HasInitializer"><span class="secnum">13.3.3.3</span> SS: HasInitializer</a></li><li><span class="item-toggle-none"></span><a href="#sec-destructuring-binding-patterns-static-semantics-issimpleparameterlist" title="Static Semantics: IsSimpleParameterList"><span class="secnum">13.3.3.4</span> SS: IsSimpleParameterList</a></li><li><span class="item-toggle-none"></span><a href="#sec-destructuring-binding-patterns-runtime-semantics-bindinginitialization" title="Runtime Semantics: BindingInitialization"><span class="secnum">13.3.3.5</span> RS: BindingInitialization</a></li><li><span class="item-toggle-none"></span><a href="#sec-destructuring-binding-patterns-runtime-semantics-propertybindinginitialization" title="Runtime Semantics: PropertyBindingInitialization"><span class="secnum">13.3.3.6</span> RS: PropertyBindingInitialization</a></li><li><span class="item-toggle-none"></span><a href="#sec-destructuring-binding-patterns-runtime-semantics-restbindinginitialization" title="Runtime Semantics: RestBindingInitialization"><span class="secnum">13.3.3.7</span> RS: RestBindingInitialization</a></li><li><span class="item-toggle-none"></span><a href="#sec-destructuring-binding-patterns-runtime-semantics-iteratorbindinginitialization" title="Runtime Semantics: IteratorBindingInitialization"><span class="secnum">13.3.3.8</span> RS: IteratorBindingInitialization</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-keyedbindinginitialization" title="Runtime Semantics: KeyedBindingInitialization"><span class="secnum">13.3.3.9</span> RS: KeyedBindingInitialization</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-empty-statement" title="Empty Statement"><span class="secnum">13.4</span> Empty Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-empty-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.4.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-expression-statement" title="Expression Statement"><span class="secnum">13.5</span> Expression Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-expression-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.5.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-if-statement" title="The if Statement"><span class="secnum">13.6</span> The <code>if</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-if-statement-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.6.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-if-statement-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">13.6.2</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-if-statement-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.6.3</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-if-statement-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.6.4</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-if-statement-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.6.5</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-if-statement-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.6.6</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-if-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.6.7</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-iteration-statements" title="Iteration Statements"><span class="secnum">13.7</span> Iteration Statements</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-iteration-statements-semantics" title="Semantics"><span class="secnum">13.7.1</span> Semantics</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-semantics-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.7.1.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-loopcontinues" title="LoopContinues ( completion, labelSet )"><span class="secnum">13.7.1.2</span> LoopContinues ( <var>completion</var>, <var>labelSet</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-do-while-statement" title="The do-while Statement"><span class="secnum">13.7.2</span> The <code>do</code>-<code>while</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-do-while-statement-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">13.7.2.1</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-do-while-statement-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.7.2.2</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-do-while-statement-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.7.2.3</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-do-while-statement-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.7.2.4</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-do-while-statement-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.7.2.5</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-do-while-statement-runtime-semantics-labelledevaluation" title="Runtime Semantics: LabelledEvaluation"><span class="secnum">13.7.2.6</span> RS: LabelledEvaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-while-statement" title="The while Statement"><span class="secnum">13.7.3</span> The <code>while</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-while-statement-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">13.7.3.1</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-while-statement-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.7.3.2</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-while-statement-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.7.3.3</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-while-statement-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.7.3.4</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-while-statement-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.7.3.5</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-while-statement-runtime-semantics-labelledevaluation" title="Runtime Semantics: LabelledEvaluation"><span class="secnum">13.7.3.6</span> RS: LabelledEvaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-for-statement" title="The for Statement"><span class="secnum">13.7.4</span> The <code>for</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-for-statement-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.7.4.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-statement-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">13.7.4.2</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-statement-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.7.4.3</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-statement-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.7.4.4</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-statement-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.7.4.5</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-statement-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.7.4.6</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-statement-runtime-semantics-labelledevaluation" title="Runtime Semantics: LabelledEvaluation"><span class="secnum">13.7.4.7</span> RS: LabelledEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-forbodyevaluation" title="ForBodyEvaluation ( test, increment, stmt, perIterationBindings, labelSet )"><span class="secnum">13.7.4.8</span> ForBodyEvaluation ( <var>test</var>, <var>increment</var>, <var>stmt</var>, <var>perIterationBindings</var>, <var>labelSet</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-createperiterationenvironment" title="CreatePerIterationEnvironment ( perIterationBindings )"><span class="secnum">13.7.4.9</span> CreatePerIterationEnvironment ( <var>perIterationBindings</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-for-in-and-for-of-statements" title="The for-in, for-of, and for-await-of Statements"><span class="secnum">13.7.5</span> The <code>for</code>-<code>in</code>, <code>for</code>-<code>of</code>, and <code>for</code>-<code>await</code>-<code>of</code> Statements</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-for-in-and-for-of-statements-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.7.5.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-in-and-for-of-statements-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">13.7.5.2</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-in-and-for-of-statements-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">13.7.5.3</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-in-and-for-of-statements-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.7.5.4</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-in-and-for-of-statements-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.7.5.5</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-in-and-for-of-statements-static-semantics-isdestructuring" title="Static Semantics: IsDestructuring"><span class="secnum">13.7.5.6</span> SS: IsDestructuring</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-in-and-for-of-statements-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.7.5.7</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-in-and-for-of-statements-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.7.5.8</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-in-and-for-of-statements-runtime-semantics-bindinginitialization" title="Runtime Semantics: BindingInitialization"><span class="secnum">13.7.5.9</span> RS: BindingInitialization</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-bindinginstantiation" title="Runtime Semantics: BindingInstantiation"><span class="secnum">13.7.5.10</span> RS: BindingInstantiation</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation" title="Runtime Semantics: LabelledEvaluation"><span class="secnum">13.7.5.11</span> RS: LabelledEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-forinofheadevaluation" title="ForIn/OfHeadEvaluation ( uninitializedBoundNames, expr, iterationKind )"><span class="secnum">13.7.5.12</span> ForIn/OfHeadEvaluation ( <var>uninitializedBoundNames</var>, <var>expr</var>, <var>iterationKind</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-forin-div-ofbodyevaluation-lhs-stmt-iterator-lhskind-labelset" title="ForIn/OfBodyEvaluation ( lhs, stmt, iteratorRecord, iterationKind, lhsKind, labelSet [ , iteratorKind ] )"><span class="secnum">13.7.5.13</span> ForIn/OfBodyEvaluation ( <var>lhs</var>, <var>stmt</var>, <var>iteratorRecord</var>, <var>iterationKind</var>, <var>lhsKind</var>, <var>labelSet</var> [ , <var>iteratorKind</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-for-in-and-for-of-statements-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.7.5.14</span> RS: Evaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-enumerate-object-properties" title="EnumerateObjectProperties ( O )"><span class="secnum">13.7.5.15</span> EnumerateObjectProperties ( <var>O</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-for-in-iterator-objects" title="For-In Iterator Objects"><span class="secnum">13.7.5.16</span> For-In Iterator Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createforiniterator" title="CreateForInIterator ( object )"><span class="secnum">13.7.5.16.1</span> CreateForInIterator ( <var>object</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-%foriniteratorprototype%-object" title="The %ForInIteratorPrototype% Object"><span class="secnum">13.7.5.16.2</span> The %ForInIteratorPrototype% Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%foriniteratorprototype%.next" title="%ForInIteratorPrototype%.next ( )"><span class="secnum">13.7.5.16.2.1</span> %ForInIteratorPrototype%.next ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-for-in-iterator-instances" title="Properties of For-In Iterator Instances"><span class="secnum">13.7.5.16.3</span> Properties of For-In Iterator Instances</a></li></ol></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-continue-statement" title="The continue Statement"><span class="secnum">13.8</span> The <code>continue</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-continue-statement-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.8.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-continue-statement-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.8.2</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-continue-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.8.3</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-break-statement" title="The break Statement"><span class="secnum">13.9</span> The <code>break</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-break-statement-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.9.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-break-statement-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.9.2</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-break-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.9.3</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-return-statement" title="The return Statement"><span class="secnum">13.10</span> The <code>return</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-return-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.10.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-with-statement" title="The with Statement"><span class="secnum">13.11</span> The <code>with</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-with-statement-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.11.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-with-statement-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">13.11.2</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-with-statement-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.11.3</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-with-statement-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.11.4</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-with-statement-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.11.5</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-with-statement-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.11.6</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-with-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.11.7</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-switch-statement" title="The switch Statement"><span class="secnum">13.12</span> The <code>switch</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-switch-statement-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.12.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-switch-statement-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">13.12.2</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-switch-statement-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.12.3</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-switch-statement-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.12.4</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-switch-statement-static-semantics-lexicallydeclarednames" title="Static Semantics: LexicallyDeclaredNames"><span class="secnum">13.12.5</span> SS: LexicallyDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-switch-statement-static-semantics-lexicallyscopeddeclarations" title="Static Semantics: LexicallyScopedDeclarations"><span class="secnum">13.12.6</span> SS: LexicallyScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-switch-statement-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.12.7</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-switch-statement-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.12.8</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-caseblockevaluation" title="Runtime Semantics: CaseBlockEvaluation"><span class="secnum">13.12.9</span> RS: CaseBlockEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-caseclauseisselected" title="CaseClauseIsSelected ( C, input )"><span class="secnum">13.12.10</span> CaseClauseIsSelected ( <var>C</var>, <var>input</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-switch-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.12.11</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-labelled-statements" title="Labelled Statements"><span class="secnum">13.13</span> Labelled Statements</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.13.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">13.13.2</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.13.3</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.13.4</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-islabelledfunction" title="Static Semantics: IsLabelledFunction ( stmt )"><span class="secnum">13.13.5</span> SS: IsLabelledFunction ( <var>stmt</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-lexicallydeclarednames" title="Static Semantics: LexicallyDeclaredNames"><span class="secnum">13.13.6</span> SS: LexicallyDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-lexicallyscopeddeclarations" title="Static Semantics: LexicallyScopedDeclarations"><span class="secnum">13.13.7</span> SS: LexicallyScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-toplevellexicallydeclarednames" title="Static Semantics: TopLevelLexicallyDeclaredNames"><span class="secnum">13.13.8</span> SS: TopLevelLexicallyDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-toplevellexicallyscopeddeclarations" title="Static Semantics: TopLevelLexicallyScopedDeclarations"><span class="secnum">13.13.9</span> SS: TopLevelLexicallyScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-toplevelvardeclarednames" title="Static Semantics: TopLevelVarDeclaredNames"><span class="secnum">13.13.10</span> SS: TopLevelVarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-toplevelvarscopeddeclarations" title="Static Semantics: TopLevelVarScopedDeclarations"><span class="secnum">13.13.11</span> SS: TopLevelVarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.13.12</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.13.13</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-runtime-semantics-labelledevaluation" title="Runtime Semantics: LabelledEvaluation"><span class="secnum">13.13.14</span> RS: LabelledEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-statements-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.13.15</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-throw-statement" title="The throw Statement"><span class="secnum">13.14</span> The <code>throw</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-throw-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.14.1</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-try-statement" title="The try Statement"><span class="secnum">13.15</span> The <code>try</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-try-statement-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">13.15.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-try-statement-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">13.15.2</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-try-statement-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">13.15.3</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-try-statement-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">13.15.4</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-try-statement-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">13.15.5</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-try-statement-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">13.15.6</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-catchclauseevaluation" title="Runtime Semantics: CatchClauseEvaluation"><span class="secnum">13.15.7</span> RS: CatchClauseEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-try-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.15.8</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-debugger-statement" title="The debugger Statement"><span class="secnum">13.16</span> The <code>debugger</code> Statement</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-debugger-statement-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">13.16.1</span> RS: Evaluation</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-functions-and-classes" title="ECMAScript Language: Functions and Classes"><span class="secnum">14</span> ECMAScript Language: Functions and Classes</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-function-definitions" title="Function Definitions"><span class="secnum">14.1</span> Function Definitions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-directive-prologues-and-the-use-strict-directive" title="Directive Prologues and the Use Strict Directive"><span class="secnum">14.1.1</span> Directive Prologues and the Use Strict Directive</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">14.1.2</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">14.1.3</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-contains" title="Static Semantics: Contains"><span class="secnum">14.1.4</span> SS: Contains</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">14.1.5</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-containsexpression" title="Static Semantics: ContainsExpression"><span class="secnum">14.1.6</span> SS: ContainsExpression</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">14.1.7</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">14.1.8</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-containsusestrict" title="Static Semantics: ContainsUseStrict"><span class="secnum">14.1.9</span> SS: ContainsUseStrict</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-expectedargumentcount" title="Static Semantics: ExpectedArgumentCount"><span class="secnum">14.1.10</span> SS: ExpectedArgumentCount</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-hasinitializer" title="Static Semantics: HasInitializer"><span class="secnum">14.1.11</span> SS: HasInitializer</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-hasname" title="Static Semantics: HasName"><span class="secnum">14.1.12</span> SS: HasName</a></li><li><span class="item-toggle-none"></span><a href="#sec-isanonymousfunctiondefinition" title="Static Semantics: IsAnonymousFunctionDefinition ( expr )"><span class="secnum">14.1.13</span> SS: IsAnonymousFunctionDefinition ( <var>expr</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-isconstantdeclaration" title="Static Semantics: IsConstantDeclaration"><span class="secnum">14.1.14</span> SS: IsConstantDeclaration</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">14.1.15</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-issimpleparameterlist" title="Static Semantics: IsSimpleParameterList"><span class="secnum">14.1.16</span> SS: IsSimpleParameterList</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-lexicallydeclarednames" title="Static Semantics: LexicallyDeclaredNames"><span class="secnum">14.1.17</span> SS: LexicallyDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-lexicallyscopeddeclarations" title="Static Semantics: LexicallyScopedDeclarations"><span class="secnum">14.1.18</span> SS: LexicallyScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">14.1.19</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">14.1.20</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-runtime-semantics-evaluatebody" title="Runtime Semantics: EvaluateBody"><span class="secnum">14.1.21</span> RS: EvaluateBody</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-runtime-semantics-iteratorbindinginitialization" title="Runtime Semantics: IteratorBindingInitialization"><span class="secnum">14.1.22</span> RS: IteratorBindingInitialization</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-runtime-semantics-instantiatefunctionobject" title="Runtime Semantics: InstantiateFunctionObject"><span class="secnum">14.1.23</span> RS: InstantiateFunctionObject</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-runtime-semantics-namedevaluation" title="Runtime Semantics: NamedEvaluation"><span class="secnum">14.1.24</span> RS: NamedEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-definitions-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">14.1.25</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-arrow-function-definitions" title="Arrow Function Definitions"><span class="secnum">14.2</span> Arrow Function Definitions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">14.2.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">14.2.2</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-contains" title="Static Semantics: Contains"><span class="secnum">14.2.3</span> SS: Contains</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-containsexpression" title="Static Semantics: ContainsExpression"><span class="secnum">14.2.4</span> SS: ContainsExpression</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-containsusestrict" title="Static Semantics: ContainsUseStrict"><span class="secnum">14.2.5</span> SS: ContainsUseStrict</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-expectedargumentcount" title="Static Semantics: ExpectedArgumentCount"><span class="secnum">14.2.6</span> SS: ExpectedArgumentCount</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-hasname" title="Static Semantics: HasName"><span class="secnum">14.2.7</span> SS: HasName</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-issimpleparameterlist" title="Static Semantics: IsSimpleParameterList"><span class="secnum">14.2.8</span> SS: IsSimpleParameterList</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-coveredformalslist" title="Static Semantics: CoveredFormalsList"><span class="secnum">14.2.9</span> SS: CoveredFormalsList</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-lexicallydeclarednames" title="Static Semantics: LexicallyDeclaredNames"><span class="secnum">14.2.10</span> SS: LexicallyDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-lexicallyscopeddeclarations" title="Static Semantics: LexicallyScopedDeclarations"><span class="secnum">14.2.11</span> SS: LexicallyScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">14.2.12</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">14.2.13</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-runtime-semantics-iteratorbindinginitialization" title="Runtime Semantics: IteratorBindingInitialization"><span class="secnum">14.2.14</span> RS: IteratorBindingInitialization</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-runtime-semantics-evaluatebody" title="Runtime Semantics: EvaluateBody"><span class="secnum">14.2.15</span> RS: EvaluateBody</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-runtime-semantics-namedevaluation" title="Runtime Semantics: NamedEvaluation"><span class="secnum">14.2.16</span> RS: NamedEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-arrow-function-definitions-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">14.2.17</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-method-definitions" title="Method Definitions"><span class="secnum">14.3</span> Method Definitions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-method-definitions-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">14.3.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-method-definitions-static-semantics-computedpropertycontains" title="Static Semantics: ComputedPropertyContains"><span class="secnum">14.3.2</span> SS: ComputedPropertyContains</a></li><li><span class="item-toggle-none"></span><a href="#sec-method-definitions-static-semantics-expectedargumentcount" title="Static Semantics: ExpectedArgumentCount"><span class="secnum">14.3.3</span> SS: ExpectedArgumentCount</a></li><li><span class="item-toggle-none"></span><a href="#sec-method-definitions-static-semantics-hasdirectsuper" title="Static Semantics: HasDirectSuper"><span class="secnum">14.3.4</span> SS: HasDirectSuper</a></li><li><span class="item-toggle-none"></span><a href="#sec-method-definitions-static-semantics-propname" title="Static Semantics: PropName"><span class="secnum">14.3.5</span> SS: PropName</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-specialmethod" title="Static Semantics: SpecialMethod"><span class="secnum">14.3.6</span> SS: SpecialMethod</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-definemethod" title="Runtime Semantics: DefineMethod"><span class="secnum">14.3.7</span> RS: DefineMethod</a></li><li><span class="item-toggle-none"></span><a href="#sec-method-definitions-runtime-semantics-propertydefinitionevaluation" title="Runtime Semantics: PropertyDefinitionEvaluation"><span class="secnum">14.3.8</span> RS: PropertyDefinitionEvaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-generator-function-definitions" title="Generator Function Definitions"><span class="secnum">14.4</span> Generator Function Definitions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">14.4.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">14.4.2</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-static-semantics-computedpropertycontains" title="Static Semantics: ComputedPropertyContains"><span class="secnum">14.4.3</span> SS: ComputedPropertyContains</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-static-semantics-contains" title="Static Semantics: Contains"><span class="secnum">14.4.4</span> SS: Contains</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-static-semantics-hasdirectsuper" title="Static Semantics: HasDirectSuper"><span class="secnum">14.4.5</span> SS: HasDirectSuper</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-static-semantics-hasname" title="Static Semantics: HasName"><span class="secnum">14.4.6</span> SS: HasName</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-static-semantics-isconstantdeclaration" title="Static Semantics: IsConstantDeclaration"><span class="secnum">14.4.7</span> SS: IsConstantDeclaration</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">14.4.8</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-static-semantics-propname" title="Static Semantics: PropName"><span class="secnum">14.4.9</span> SS: PropName</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-runtime-semantics-evaluatebody" title="Runtime Semantics: EvaluateBody"><span class="secnum">14.4.10</span> RS: EvaluateBody</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject" title="Runtime Semantics: InstantiateFunctionObject"><span class="secnum">14.4.11</span> RS: InstantiateFunctionObject</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-runtime-semantics-propertydefinitionevaluation" title="Runtime Semantics: PropertyDefinitionEvaluation"><span class="secnum">14.4.12</span> RS: PropertyDefinitionEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-runtime-semantics-namedevaluation" title="Runtime Semantics: NamedEvaluation"><span class="secnum">14.4.13</span> RS: NamedEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator-function-definitions-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">14.4.14</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-async-generator-function-definitions" title="Async Generator Function Definitions"><span class="secnum">14.5</span> Async Generator Function Definitions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-async-generator-function-definitions-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">14.5.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-generator-function-definitions-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">14.5.2</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-generator-function-definitions-static-semantics-computedpropertycontains" title="Static Semantics: ComputedPropertyContains"><span class="secnum">14.5.3</span> SS: ComputedPropertyContains</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-generator-function-definitions-static-semantics-contains" title="Static Semantics: Contains"><span class="secnum">14.5.4</span> SS: Contains</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-generator-function-definitions-static-semantics-hasdirectsuper" title="Static Semantics: HasDirectSuper"><span class="secnum">14.5.5</span> SS: HasDirectSuper</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-generator-function-definitions-static-semantics-hasname" title="Static Semantics: HasName"><span class="secnum">14.5.6</span> SS: HasName</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-generator-function-definitions-static-semantics-isconstantdeclaration" title="Static Semantics: IsConstantDeclaration"><span class="secnum">14.5.7</span> SS: IsConstantDeclaration</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-generator-function-definitions-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">14.5.8</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-generator-function-definitions-static-semantics-propname" title="Static Semantics: PropName"><span class="secnum">14.5.9</span> SS: PropName</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgenerator-definitions-evaluatebody" title="Runtime Semantics: EvaluateBody"><span class="secnum">14.5.10</span> RS: EvaluateBody</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgenerator-definitions-instantiatefunctionobject" title="Runtime Semantics: InstantiateFunctionObject"><span class="secnum">14.5.11</span> RS: InstantiateFunctionObject</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgenerator-definitions-propertydefinitionevaluation" title="Runtime Semantics: PropertyDefinitionEvaluation"><span class="secnum">14.5.12</span> RS: PropertyDefinitionEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgenerator-definitions-namedevaluation" title="Runtime Semantics: NamedEvaluation"><span class="secnum">14.5.13</span> RS: NamedEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgenerator-definitions-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">14.5.14</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-class-definitions" title="Class Definitions"><span class="secnum">14.6</span> Class Definitions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-class-definitions-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">14.6.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-class-definitions-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">14.6.2</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-classelementkind" title="Static Semantics: ClassElementKind"><span class="secnum">14.6.3</span> SS: ClassElementKind</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-constructormethod" title="Static Semantics: ConstructorMethod"><span class="secnum">14.6.4</span> SS: ConstructorMethod</a></li><li><span class="item-toggle-none"></span><a href="#sec-class-definitions-static-semantics-contains" title="Static Semantics: Contains"><span class="secnum">14.6.5</span> SS: Contains</a></li><li><span class="item-toggle-none"></span><a href="#sec-class-definitions-static-semantics-computedpropertycontains" title="Static Semantics: ComputedPropertyContains"><span class="secnum">14.6.6</span> SS: ComputedPropertyContains</a></li><li><span class="item-toggle-none"></span><a href="#sec-class-definitions-static-semantics-hasname" title="Static Semantics: HasName"><span class="secnum">14.6.7</span> SS: HasName</a></li><li><span class="item-toggle-none"></span><a href="#sec-class-definitions-static-semantics-isconstantdeclaration" title="Static Semantics: IsConstantDeclaration"><span class="secnum">14.6.8</span> SS: IsConstantDeclaration</a></li><li><span class="item-toggle-none"></span><a href="#sec-class-definitions-static-semantics-isfunctiondefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">14.6.9</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-isstatic" title="Static Semantics: IsStatic"><span class="secnum">14.6.10</span> SS: IsStatic</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-nonconstructormethoddefinitions" title="Static Semantics: NonConstructorMethodDefinitions"><span class="secnum">14.6.11</span> SS: NonConstructorMethodDefinitions</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-prototypepropertynamelist" title="Static Semantics: PrototypePropertyNameList"><span class="secnum">14.6.12</span> SS: PrototypePropertyNameList</a></li><li><span class="item-toggle-none"></span><a href="#sec-class-definitions-static-semantics-propname" title="Static Semantics: PropName"><span class="secnum">14.6.13</span> SS: PropName</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-classdefinitionevaluation" title="Runtime Semantics: ClassDefinitionEvaluation"><span class="secnum">14.6.14</span> RS: ClassDefinitionEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-bindingclassdeclarationevaluation" title="Runtime Semantics: BindingClassDeclarationEvaluation"><span class="secnum">14.6.15</span> RS: BindingClassDeclarationEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-class-definitions-runtime-semantics-namedevaluation" title="Runtime Semantics: NamedEvaluation"><span class="secnum">14.6.16</span> RS: NamedEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-class-definitions-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">14.6.17</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-async-function-definitions" title="Async Function Definitions"><span class="secnum">14.7</span> Async Function Definitions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">14.7.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-static-semantics-BoundNames" title="Static Semantics: BoundNames"><span class="secnum">14.7.2</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-static-semantics-ComputedPropertyContains" title="Static Semantics: ComputedPropertyContains"><span class="secnum">14.7.3</span> SS: ComputedPropertyContains</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-static-semantics-Contains" title="Static Semantics: Contains"><span class="secnum">14.7.4</span> SS: Contains</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-static-semantics-HasDirectSuper" title="Static Semantics: HasDirectSuper"><span class="secnum">14.7.5</span> SS: HasDirectSuper</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-static-semantics-HasName" title="Static Semantics: HasName"><span class="secnum">14.7.6</span> SS: HasName</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-static-semantics-IsConstantDeclaration" title="Static Semantics: IsConstantDeclaration"><span class="secnum">14.7.7</span> SS: IsConstantDeclaration</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-static-semantics-IsFunctionDefinition" title="Static Semantics: IsFunctionDefinition"><span class="secnum">14.7.8</span> SS: IsFunctionDefinition</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-static-semantics-PropName" title="Static Semantics: PropName"><span class="secnum">14.7.9</span> SS: PropName</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-InstantiateFunctionObject" title="Runtime Semantics: InstantiateFunctionObject"><span class="secnum">14.7.10</span> RS: InstantiateFunctionObject</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-EvaluateBody" title="Runtime Semantics: EvaluateBody"><span class="secnum">14.7.11</span> RS: EvaluateBody</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-PropertyDefinitionEvaluation" title="Runtime Semantics: PropertyDefinitionEvaluation"><span class="secnum">14.7.12</span> RS: PropertyDefinitionEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-runtime-semantics-namedevaluation" title="Runtime Semantics: NamedEvaluation"><span class="secnum">14.7.13</span> RS: NamedEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-definitions-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">14.7.14</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-async-arrow-function-definitions" title="Async Arrow Function Definitions"><span class="secnum">14.8</span> Async Arrow Function Definitions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">14.8.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-CoveredAsyncArrowHead" title="Static Semantics: CoveredAsyncArrowHead"><span class="secnum">14.8.2</span> SS: CoveredAsyncArrowHead</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-BoundNames" title="Static Semantics: BoundNames"><span class="secnum">14.8.3</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-Contains" title="Static Semantics: Contains"><span class="secnum">14.8.4</span> SS: Contains</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-ContainsExpression" title="Static Semantics: ContainsExpression"><span class="secnum">14.8.5</span> SS: ContainsExpression</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-containsusestrict" title="Static Semantics: ContainsUseStrict"><span class="secnum">14.8.6</span> SS: ContainsUseStrict</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-ExpectedArgumentCount" title="Static Semantics: ExpectedArgumentCount"><span class="secnum">14.8.7</span> SS: ExpectedArgumentCount</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-HasName" title="Static Semantics: HasName"><span class="secnum">14.8.8</span> SS: HasName</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-IsSimpleParameterList" title="Static Semantics: IsSimpleParameterList"><span class="secnum">14.8.9</span> SS: IsSimpleParameterList</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-LexicallyDeclaredNames" title="Static Semantics: LexicallyDeclaredNames"><span class="secnum">14.8.10</span> SS: LexicallyDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-LexicallyScopedDeclarations" title="Static Semantics: LexicallyScopedDeclarations"><span class="secnum">14.8.11</span> SS: LexicallyScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-VarDeclaredNames" title="Static Semantics: VarDeclaredNames"><span class="secnum">14.8.12</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-static-semantics-VarScopedDeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">14.8.13</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-IteratorBindingInitialization" title="Runtime Semantics: IteratorBindingInitialization"><span class="secnum">14.8.14</span> RS: IteratorBindingInitialization</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-EvaluateBody" title="Runtime Semantics: EvaluateBody"><span class="secnum">14.8.15</span> RS: EvaluateBody</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-runtime-semantics-namedevaluation" title="Runtime Semantics: NamedEvaluation"><span class="secnum">14.8.16</span> RS: NamedEvaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-arrow-function-definitions-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">14.8.17</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-tail-position-calls" title="Tail Position Calls"><span class="secnum">14.9</span> Tail Position Calls</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-isintailposition" title="Static Semantics: IsInTailPosition ( call )"><span class="secnum">14.9.1</span> SS: IsInTailPosition ( <var>call</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-static-semantics-hascallintailposition" title="Static Semantics: HasCallInTailPosition"><span class="secnum">14.9.2</span> SS: HasCallInTailPosition</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-statement-rules" title="Statement Rules"><span class="secnum">14.9.2.1</span> Statement Rules</a></li><li><span class="item-toggle-none"></span><a href="#sec-expression-rules" title="Expression Rules"><span class="secnum">14.9.2.2</span> Expression Rules</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-preparefortailcall" title="PrepareForTailCall ( )"><span class="secnum">14.9.3</span> PrepareForTailCall ( )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-ecmascript-language-scripts-and-modules" title="ECMAScript Language: Scripts and Modules"><span class="secnum">15</span> ECMAScript Language: Scripts and Modules</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-scripts" title="Scripts"><span class="secnum">15.1</span> Scripts</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-scripts-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">15.1.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-isstrict" title="Static Semantics: IsStrict"><span class="secnum">15.1.2</span> SS: IsStrict</a></li><li><span class="item-toggle-none"></span><a href="#sec-scripts-static-semantics-lexicallydeclarednames" title="Static Semantics: LexicallyDeclaredNames"><span class="secnum">15.1.3</span> SS: LexicallyDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-scripts-static-semantics-lexicallyscopeddeclarations" title="Static Semantics: LexicallyScopedDeclarations"><span class="secnum">15.1.4</span> SS: LexicallyScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-scripts-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">15.1.5</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-scripts-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">15.1.6</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-script-semantics-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">15.1.7</span> RS: Evaluation</a></li><li><span class="item-toggle-none"></span><a href="#sec-script-records" title="Script Records"><span class="secnum">15.1.8</span> Script Records</a></li><li><span class="item-toggle-none"></span><a href="#sec-parse-script" title="ParseScript ( sourceText, realm, hostDefined )"><span class="secnum">15.1.9</span> ParseScript ( <var>sourceText</var>, <var>realm</var>, <var>hostDefined</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-scriptevaluation" title="ScriptEvaluation ( scriptRecord )"><span class="secnum">15.1.10</span> ScriptEvaluation ( <var>scriptRecord</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-globaldeclarationinstantiation" title="GlobalDeclarationInstantiation ( script, env )"><span class="secnum">15.1.11</span> GlobalDeclarationInstantiation ( <var>script</var>, <var>env</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-modules" title="Modules"><span class="secnum">15.2</span> Modules</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-module-semantics" title="Module Semantics"><span class="secnum">15.2.1</span> Module Semantics</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">15.2.1.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-containsduplicatelabels" title="Static Semantics: ContainsDuplicateLabels"><span class="secnum">15.2.1.2</span> SS: ContainsDuplicateLabels</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-containsundefinedbreaktarget" title="Static Semantics: ContainsUndefinedBreakTarget"><span class="secnum">15.2.1.3</span> SS: ContainsUndefinedBreakTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-containsundefinedcontinuetarget" title="Static Semantics: ContainsUndefinedContinueTarget"><span class="secnum">15.2.1.4</span> SS: ContainsUndefinedContinueTarget</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-exportedbindings" title="Static Semantics: ExportedBindings"><span class="secnum">15.2.1.5</span> SS: ExportedBindings</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-exportednames" title="Static Semantics: ExportedNames"><span class="secnum">15.2.1.6</span> SS: ExportedNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-exportentries" title="Static Semantics: ExportEntries"><span class="secnum">15.2.1.7</span> SS: ExportEntries</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-importentries" title="Static Semantics: ImportEntries"><span class="secnum">15.2.1.8</span> SS: ImportEntries</a></li><li><span class="item-toggle-none"></span><a href="#sec-importedlocalnames" title="Static Semantics: ImportedLocalNames ( importEntries )"><span class="secnum">15.2.1.9</span> SS: ImportedLocalNames ( <var>importEntries</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-modulerequests" title="Static Semantics: ModuleRequests"><span class="secnum">15.2.1.10</span> SS: ModuleRequests</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-lexicallydeclarednames" title="Static Semantics: LexicallyDeclaredNames"><span class="secnum">15.2.1.11</span> SS: LexicallyDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-lexicallyscopeddeclarations" title="Static Semantics: LexicallyScopedDeclarations"><span class="secnum">15.2.1.12</span> SS: LexicallyScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-vardeclarednames" title="Static Semantics: VarDeclaredNames"><span class="secnum">15.2.1.13</span> SS: VarDeclaredNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-static-semantics-varscopeddeclarations" title="Static Semantics: VarScopedDeclarations"><span class="secnum">15.2.1.14</span> SS: VarScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-abstract-module-records" title="Abstract Module Records"><span class="secnum">15.2.1.15</span> Abstract Module Records</a></li><li><span class="item-toggle">◢</span><a href="#sec-cyclic-module-records" title="Cyclic Module Records"><span class="secnum">15.2.1.16</span> Cyclic Module Records</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-moduledeclarationlinking" title="Link ( ) Concrete Method"><span class="secnum">15.2.1.16.1</span> Link ( ) Concrete Method</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-InnerModuleLinking" title="InnerModuleLinking ( module, stack, index )"><span class="secnum">15.2.1.16.1.1</span> InnerModuleLinking ( <var>module</var>, <var>stack</var>, <var>index</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-moduleevaluation" title="Evaluate ( ) Concrete Method"><span class="secnum">15.2.1.16.2</span> Evaluate ( ) Concrete Method</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-innermoduleevaluation" title="InnerModuleEvaluation ( module, stack, index )"><span class="secnum">15.2.1.16.2.1</span> InnerModuleEvaluation ( <var>module</var>, <var>stack</var>, <var>index</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-example-cyclic-module-record-graphs" title="Example Cyclic Module Record Graphs"><span class="secnum">15.2.1.16.3</span> Example Cyclic Module Record Graphs</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-source-text-module-records" title="Source Text Module Records"><span class="secnum">15.2.1.17</span> Source Text Module Records</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-parsemodule" title="ParseModule ( sourceText, realm, hostDefined )"><span class="secnum">15.2.1.17.1</span> ParseModule ( <var>sourceText</var>, <var>realm</var>, <var>hostDefined</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getexportednames" title="GetExportedNames ( [ exportStarSet ] ) Concrete Method"><span class="secnum">15.2.1.17.2</span> GetExportedNames ( [ <var>exportStarSet</var> ] ) Concrete Method</a></li><li><span class="item-toggle-none"></span><a href="#sec-resolveexport" title="ResolveExport ( exportName [ , resolveSet ] ) Concrete Method"><span class="secnum">15.2.1.17.3</span> ResolveExport ( <var>exportName</var> [ , <var>resolveSet</var> ] ) Concrete Method</a></li><li><span class="item-toggle-none"></span><a href="#sec-source-text-module-record-initialize-environment" title="InitializeEnvironment ( ) Concrete Method"><span class="secnum">15.2.1.17.4</span> InitializeEnvironment ( ) Concrete Method</a></li><li><span class="item-toggle-none"></span><a href="#sec-source-text-module-record-execute-module" title="ExecuteModule ( ) Concrete Method"><span class="secnum">15.2.1.17.5</span> ExecuteModule ( ) Concrete Method</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-hostresolveimportedmodule" title="HostResolveImportedModule ( referencingScriptOrModule, specifier )"><span class="secnum">15.2.1.18</span> HostResolveImportedModule ( <var>referencingScriptOrModule</var>, <var>specifier</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hostimportmoduledynamically" title="HostImportModuleDynamically ( referencingScriptOrModule, specifier, promiseCapability )"><span class="secnum">15.2.1.19</span> HostImportModuleDynamically ( <var>referencingScriptOrModule</var>, <var>specifier</var>, <var>promiseCapability</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-finishdynamicimport" title="FinishDynamicImport ( referencingScriptOrModule, specifier, promiseCapability, completion )"><span class="secnum">15.2.1.20</span> FinishDynamicImport ( <var>referencingScriptOrModule</var>, <var>specifier</var>, <var>promiseCapability</var>, <var>completion</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getmodulenamespace" title="GetModuleNamespace ( module )"><span class="secnum">15.2.1.21</span> GetModuleNamespace ( <var>module</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-module-semantics-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">15.2.1.22</span> RS: Evaluation</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-imports" title="Imports"><span class="secnum">15.2.2</span> Imports</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-imports-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">15.2.2.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-imports-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">15.2.2.2</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-imports-static-semantics-importentries" title="Static Semantics: ImportEntries"><span class="secnum">15.2.2.3</span> SS: ImportEntries</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-importentriesformodule" title="Static Semantics: ImportEntriesForModule"><span class="secnum">15.2.2.4</span> SS: ImportEntriesForModule</a></li><li><span class="item-toggle-none"></span><a href="#sec-imports-static-semantics-modulerequests" title="Static Semantics: ModuleRequests"><span class="secnum">15.2.2.5</span> SS: ModuleRequests</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-exports" title="Exports"><span class="secnum">15.2.3</span> Exports</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-exports-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">15.2.3.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-exports-static-semantics-boundnames" title="Static Semantics: BoundNames"><span class="secnum">15.2.3.2</span> SS: BoundNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-exports-static-semantics-exportedbindings" title="Static Semantics: ExportedBindings"><span class="secnum">15.2.3.3</span> SS: ExportedBindings</a></li><li><span class="item-toggle-none"></span><a href="#sec-exports-static-semantics-exportednames" title="Static Semantics: ExportedNames"><span class="secnum">15.2.3.4</span> SS: ExportedNames</a></li><li><span class="item-toggle-none"></span><a href="#sec-exports-static-semantics-exportentries" title="Static Semantics: ExportEntries"><span class="secnum">15.2.3.5</span> SS: ExportEntries</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-exportentriesformodule" title="Static Semantics: ExportEntriesForModule"><span class="secnum">15.2.3.6</span> SS: ExportEntriesForModule</a></li><li><span class="item-toggle-none"></span><a href="#sec-exports-static-semantics-isconstantdeclaration" title="Static Semantics: IsConstantDeclaration"><span class="secnum">15.2.3.7</span> SS: IsConstantDeclaration</a></li><li><span class="item-toggle-none"></span><a href="#sec-exports-static-semantics-lexicallyscopeddeclarations" title="Static Semantics: LexicallyScopedDeclarations"><span class="secnum">15.2.3.8</span> SS: LexicallyScopedDeclarations</a></li><li><span class="item-toggle-none"></span><a href="#sec-exports-static-semantics-modulerequests" title="Static Semantics: ModuleRequests"><span class="secnum">15.2.3.9</span> SS: ModuleRequests</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-referencedbindings" title="Static Semantics: ReferencedBindings"><span class="secnum">15.2.3.10</span> SS: ReferencedBindings</a></li><li><span class="item-toggle-none"></span><a href="#sec-exports-runtime-semantics-evaluation" title="Runtime Semantics: Evaluation"><span class="secnum">15.2.3.11</span> RS: Evaluation</a></li></ol></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-error-handling-and-language-extensions" title="Error Handling and Language Extensions"><span class="secnum">16</span> Error Handling and Language Extensions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-forbidden-extensions" title="Forbidden Extensions"><span class="secnum">16.1</span> Forbidden Extensions</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-ecmascript-standard-built-in-objects" title="ECMAScript Standard Built-in Objects"><span class="secnum">17</span> ECMAScript Standard Built-in Objects</a></li><li><span class="item-toggle">◢</span><a href="#sec-global-object" title="The Global Object"><span class="secnum">18</span> The Global Object</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-value-properties-of-the-global-object" title="Value Properties of the Global Object"><span class="secnum">18.1</span> Value Properties of the Global Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-globalthis" title="globalThis"><span class="secnum">18.1.1</span> globalThis</a></li><li><span class="item-toggle-none"></span><a href="#sec-value-properties-of-the-global-object-infinity" title="Infinity"><span class="secnum">18.1.2</span> Infinity</a></li><li><span class="item-toggle-none"></span><a href="#sec-value-properties-of-the-global-object-nan" title="NaN"><span class="secnum">18.1.3</span> NaN</a></li><li><span class="item-toggle-none"></span><a href="#sec-undefined" title="undefined"><span class="secnum">18.1.4</span> undefined</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-function-properties-of-the-global-object" title="Function Properties of the Global Object"><span class="secnum">18.2</span> Function Properties of the Global Object</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-eval-x" title="eval ( x )"><span class="secnum">18.2.1</span> eval ( <var>x</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-performeval" title="PerformEval ( x, callerRealm, strictCaller, direct )"><span class="secnum">18.2.1.1</span> PerformEval ( <var>x</var>, <var>callerRealm</var>, <var>strictCaller</var>, <var>direct</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hostensurecancompilestrings" title="HostEnsureCanCompileStrings ( callerRealm, calleeRealm )"><span class="secnum">18.2.1.2</span> HostEnsureCanCompileStrings ( <var>callerRealm</var>, <var>calleeRealm</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-evaldeclarationinstantiation" title="EvalDeclarationInstantiation ( body, varEnv, lexEnv, strict )"><span class="secnum">18.2.1.3</span> EvalDeclarationInstantiation ( <var>body</var>, <var>varEnv</var>, <var>lexEnv</var>, <var>strict</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-isfinite-number" title="isFinite ( number )"><span class="secnum">18.2.2</span> isFinite ( <var>number</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isnan-number" title="isNaN ( number )"><span class="secnum">18.2.3</span> isNaN ( <var>number</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-parsefloat-string" title="parseFloat ( string )"><span class="secnum">18.2.4</span> parseFloat ( <var>string</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-parseint-string-radix" title="parseInt ( string, radix )"><span class="secnum">18.2.5</span> parseInt ( <var>string</var>, <var>radix</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-uri-handling-functions" title="URI Handling Functions"><span class="secnum">18.2.6</span> URI Handling Functions</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-uri-syntax-and-semantics" title="URI Syntax and Semantics"><span class="secnum">18.2.6.1</span> URI Syntax and Semantics</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-encode" title="Encode ( string, unescapedSet )"><span class="secnum">18.2.6.1.1</span> Encode ( <var>string</var>, <var>unescapedSet</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-decode" title="Decode ( string, reservedSet )"><span class="secnum">18.2.6.1.2</span> Decode ( <var>string</var>, <var>reservedSet</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-decodeuri-encodeduri" title="decodeURI ( encodedURI )"><span class="secnum">18.2.6.2</span> decodeURI ( <var>encodedURI</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-decodeuricomponent-encodeduricomponent" title="decodeURIComponent ( encodedURIComponent )"><span class="secnum">18.2.6.3</span> decodeURIComponent ( <var>encodedURIComponent</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-encodeuri-uri" title="encodeURI ( uri )"><span class="secnum">18.2.6.4</span> encodeURI ( <var>uri</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-encodeuricomponent-uricomponent" title="encodeURIComponent ( uriComponent )"><span class="secnum">18.2.6.5</span> encodeURIComponent ( <var>uriComponent</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-constructor-properties-of-the-global-object" title="Constructor Properties of the Global Object"><span class="secnum">18.3</span> Constructor Properties of the Global Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-array" title="Array ( . . . )"><span class="secnum">18.3.1</span> Array ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-arraybuffer" title="ArrayBuffer ( . . . )"><span class="secnum">18.3.2</span> ArrayBuffer ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-bigint" title="BigInt ( . . . )"><span class="secnum">18.3.3</span> BigInt ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-bigint64array" title="BigInt64Array ( . . . )"><span class="secnum">18.3.4</span> BigInt64Array ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-biguint64array" title="BigUint64Array ( . . . )"><span class="secnum">18.3.5</span> BigUint64Array ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-boolean" title="Boolean ( . . . )"><span class="secnum">18.3.6</span> Boolean ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-dataview" title="DataView ( . . . )"><span class="secnum">18.3.7</span> DataView ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-date" title="Date ( . . . )"><span class="secnum">18.3.8</span> Date ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-error" title="Error ( . . . )"><span class="secnum">18.3.9</span> Error ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-evalerror" title="EvalError ( . . . )"><span class="secnum">18.3.10</span> EvalError ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-finnalization-registry" title="FinalizationRegistry ( . . . )"><span class="secnum">18.3.11</span> FinalizationRegistry ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-float32array" title="Float32Array ( . . . )"><span class="secnum">18.3.12</span> Float32Array ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-float64array" title="Float64Array ( . . . )"><span class="secnum">18.3.13</span> Float64Array ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-function" title="Function ( . . . )"><span class="secnum">18.3.14</span> Function ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-int8array" title="Int8Array ( . . . )"><span class="secnum">18.3.15</span> Int8Array ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-int16array" title="Int16Array ( . . . )"><span class="secnum">18.3.16</span> Int16Array ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-int32array" title="Int32Array ( . . . )"><span class="secnum">18.3.17</span> Int32Array ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-map" title="Map ( . . . )"><span class="secnum">18.3.18</span> Map ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-number" title="Number ( . . . )"><span class="secnum">18.3.19</span> Number ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-object" title="Object ( . . . )"><span class="secnum">18.3.20</span> Object ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-promise" title="Promise ( . . . )"><span class="secnum">18.3.21</span> Promise ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-proxy" title="Proxy ( . . . )"><span class="secnum">18.3.22</span> Proxy ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-rangeerror" title="RangeError ( . . . )"><span class="secnum">18.3.23</span> RangeError ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-referenceerror" title="ReferenceError ( . . . )"><span class="secnum">18.3.24</span> ReferenceError ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-regexp" title="RegExp ( . . . )"><span class="secnum">18.3.25</span> RegExp ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-set" title="Set ( . . . )"><span class="secnum">18.3.26</span> Set ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-sharedarraybuffer" title="SharedArrayBuffer ( . . . )"><span class="secnum">18.3.27</span> SharedArrayBuffer ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-string" title="String ( . . . )"><span class="secnum">18.3.28</span> String ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-symbol" title="Symbol ( . . . )"><span class="secnum">18.3.29</span> Symbol ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-syntaxerror" title="SyntaxError ( . . . )"><span class="secnum">18.3.30</span> SyntaxError ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-typeerror" title="TypeError ( . . . )"><span class="secnum">18.3.31</span> TypeError ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-uint8array" title="Uint8Array ( . . . )"><span class="secnum">18.3.32</span> Uint8Array ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-uint8clampedarray" title="Uint8ClampedArray ( . . . )"><span class="secnum">18.3.33</span> Uint8ClampedArray ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-uint16array" title="Uint16Array ( . . . )"><span class="secnum">18.3.34</span> Uint16Array ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-uint32array" title="Uint32Array ( . . . )"><span class="secnum">18.3.35</span> Uint32Array ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-urierror" title="URIError ( . . . )"><span class="secnum">18.3.36</span> URIError ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-weakmap" title="WeakMap ( . . . )"><span class="secnum">18.3.37</span> WeakMap ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-weakref" title="WeakRef ( . . . )"><span class="secnum">18.3.38</span> WeakRef ( . . . )</a></li><li><span class="item-toggle-none"></span><a href="#sec-constructor-properties-of-the-global-object-weakset" title="WeakSet ( . . . )"><span class="secnum">18.3.39</span> WeakSet ( . . . )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-other-properties-of-the-global-object" title="Other Properties of the Global Object"><span class="secnum">18.4</span> Other Properties of the Global Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-atomics" title="Atomics"><span class="secnum">18.4.1</span> Atomics</a></li><li><span class="item-toggle-none"></span><a href="#sec-json" title="JSON"><span class="secnum">18.4.2</span> JSON</a></li><li><span class="item-toggle-none"></span><a href="#sec-math" title="Math"><span class="secnum">18.4.3</span> Math</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect" title="Reflect"><span class="secnum">18.4.4</span> Reflect</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-fundamental-objects" title="Fundamental Objects"><span class="secnum">19</span> Fundamental Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-object-objects" title="Object Objects"><span class="secnum">19.1</span> Object Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-object-constructor" title="The Object Constructor"><span class="secnum">19.1.1</span> The Object Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-object-value" title="Object ( [ value ] )"><span class="secnum">19.1.1.1</span> Object ( [ <var>value</var> ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-object-constructor" title="Properties of the Object Constructor"><span class="secnum">19.1.2</span> Properties of the Object Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-object.assign" title="Object.assign ( target, ...sources )"><span class="secnum">19.1.2.1</span> Object.assign ( <var>target</var>, ...<var>sources</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.create" title="Object.create ( O, Properties )"><span class="secnum">19.1.2.2</span> Object.create ( <var>O</var>, <var>Properties</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-object.defineproperties" title="Object.defineProperties ( O, Properties )"><span class="secnum">19.1.2.3</span> Object.defineProperties ( <var>O</var>, <var>Properties</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-objectdefineproperties" title="ObjectDefineProperties ( O, Properties )"><span class="secnum">19.1.2.3.1</span> ObjectDefineProperties ( <var>O</var>, <var>Properties</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-object.defineproperty" title="Object.defineProperty ( O, P, Attributes )"><span class="secnum">19.1.2.4</span> Object.defineProperty ( <var>O</var>, <var>P</var>, <var>Attributes</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.entries" title="Object.entries ( O )"><span class="secnum">19.1.2.5</span> Object.entries ( <var>O</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.freeze" title="Object.freeze ( O )"><span class="secnum">19.1.2.6</span> Object.freeze ( <var>O</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-object.fromentries" title="Object.fromEntries ( iterable )"><span class="secnum">19.1.2.7</span> Object.fromEntries ( <var>iterable</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-create-data-property-on-object-functions" title="CreateDataPropertyOnObject Functions"><span class="secnum">19.1.2.7.1</span> CreateDataPropertyOnObject Functions</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-object.getownpropertydescriptor" title="Object.getOwnPropertyDescriptor ( O, P )"><span class="secnum">19.1.2.8</span> Object.getOwnPropertyDescriptor ( <var>O</var>, <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.getownpropertydescriptors" title="Object.getOwnPropertyDescriptors ( O )"><span class="secnum">19.1.2.9</span> Object.getOwnPropertyDescriptors ( <var>O</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.getownpropertynames" title="Object.getOwnPropertyNames ( O )"><span class="secnum">19.1.2.10</span> Object.getOwnPropertyNames ( <var>O</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-object.getownpropertysymbols" title="Object.getOwnPropertySymbols ( O )"><span class="secnum">19.1.2.11</span> Object.getOwnPropertySymbols ( <var>O</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-getownpropertykeys" title="GetOwnPropertyKeys ( O, type )"><span class="secnum">19.1.2.11.1</span> GetOwnPropertyKeys ( <var>O</var>, <var>type</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-object.getprototypeof" title="Object.getPrototypeOf ( O )"><span class="secnum">19.1.2.12</span> Object.getPrototypeOf ( <var>O</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.is" title="Object.is ( value1, value2 )"><span class="secnum">19.1.2.13</span> Object.is ( <var>value1</var>, <var>value2</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.isextensible" title="Object.isExtensible ( O )"><span class="secnum">19.1.2.14</span> Object.isExtensible ( <var>O</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.isfrozen" title="Object.isFrozen ( O )"><span class="secnum">19.1.2.15</span> Object.isFrozen ( <var>O</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.issealed" title="Object.isSealed ( O )"><span class="secnum">19.1.2.16</span> Object.isSealed ( <var>O</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.keys" title="Object.keys ( O )"><span class="secnum">19.1.2.17</span> Object.keys ( <var>O</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.preventextensions" title="Object.preventExtensions ( O )"><span class="secnum">19.1.2.18</span> Object.preventExtensions ( <var>O</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.prototype" title="Object.prototype"><span class="secnum">19.1.2.19</span> Object.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.seal" title="Object.seal ( O )"><span class="secnum">19.1.2.20</span> Object.seal ( <var>O</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.setprototypeof" title="Object.setPrototypeOf ( O, proto )"><span class="secnum">19.1.2.21</span> Object.setPrototypeOf ( <var>O</var>, <var>proto</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.values" title="Object.values ( O )"><span class="secnum">19.1.2.22</span> Object.values ( <var>O</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-object-prototype-object" title="Properties of the Object Prototype Object"><span class="secnum">19.1.3</span> Properties of the Object Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-object.prototype.constructor" title="Object.prototype.constructor"><span class="secnum">19.1.3.1</span> Object.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.prototype.hasownproperty" title="Object.prototype.hasOwnProperty ( V )"><span class="secnum">19.1.3.2</span> Object.prototype.hasOwnProperty ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.prototype.isprototypeof" title="Object.prototype.isPrototypeOf ( V )"><span class="secnum">19.1.3.3</span> Object.prototype.isPrototypeOf ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.prototype.propertyisenumerable" title="Object.prototype.propertyIsEnumerable ( V )"><span class="secnum">19.1.3.4</span> Object.prototype.propertyIsEnumerable ( <var>V</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.prototype.tolocalestring" title="Object.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )"><span class="secnum">19.1.3.5</span> Object.prototype.toLocaleString ( [ <var>reserved1</var> [ , <var>reserved2</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.prototype.tostring" title="Object.prototype.toString ( )"><span class="secnum">19.1.3.6</span> Object.prototype.toString ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.prototype.valueof" title="Object.prototype.valueOf ( )"><span class="secnum">19.1.3.7</span> Object.prototype.valueOf ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-object-instances" title="Properties of Object Instances"><span class="secnum">19.1.4</span> Properties of Object Instances</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-function-objects" title="Function Objects"><span class="secnum">19.2</span> Function Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-function-constructor" title="The Function Constructor"><span class="secnum">19.2.1</span> The Function Constructor</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-function-p1-p2-pn-body" title="Function ( p1, p2, … , pn, body )"><span class="secnum">19.2.1.1</span> Function ( <var>p1</var>, <var>p2</var>, … , <var>pn</var>, <var>body</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createdynamicfunction" title="CreateDynamicFunction ( constructor, newTarget, kind, args )"><span class="secnum">19.2.1.1.1</span> CreateDynamicFunction ( <var>constructor</var>, <var>newTarget</var>, <var>kind</var>, <var>args</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-function-constructor" title="Properties of the Function Constructor"><span class="secnum">19.2.2</span> Properties of the Function Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-function.length" title="Function.length"><span class="secnum">19.2.2.1</span> Function.length</a></li><li><span class="item-toggle-none"></span><a href="#sec-function.prototype" title="Function.prototype"><span class="secnum">19.2.2.2</span> Function.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-function-prototype-object" title="Properties of the Function Prototype Object"><span class="secnum">19.2.3</span> Properties of the Function Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-function.prototype.apply" title="Function.prototype.apply ( thisArg, argArray )"><span class="secnum">19.2.3.1</span> Function.prototype.apply ( <var>thisArg</var>, <var>argArray</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-function.prototype.bind" title="Function.prototype.bind ( thisArg, ...args )"><span class="secnum">19.2.3.2</span> Function.prototype.bind ( <var>thisArg</var>, ...<var>args</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-function.prototype.call" title="Function.prototype.call ( thisArg, ...args )"><span class="secnum">19.2.3.3</span> Function.prototype.call ( <var>thisArg</var>, ...<var>args</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-function.prototype.constructor" title="Function.prototype.constructor"><span class="secnum">19.2.3.4</span> Function.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-function.prototype.tostring" title="Function.prototype.toString ( )"><span class="secnum">19.2.3.5</span> Function.prototype.toString ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-function.prototype-@@hasinstance" title="Function.prototype [ @@hasInstance ] ( V )"><span class="secnum">19.2.3.6</span> Function.prototype [ @@hasInstance ] ( <var>V</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-function-instances" title="Function Instances"><span class="secnum">19.2.4</span> Function Instances</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-function-instances-length" title="length"><span class="secnum">19.2.4.1</span> length</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-instances-name" title="name"><span class="secnum">19.2.4.2</span> name</a></li><li><span class="item-toggle-none"></span><a href="#sec-function-instances-prototype" title="prototype"><span class="secnum">19.2.4.3</span> prototype</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-hosthassourcetextavailable" title="HostHasSourceTextAvailable ( func )"><span class="secnum">19.2.5</span> HostHasSourceTextAvailable ( <var>func</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-boolean-objects" title="Boolean Objects"><span class="secnum">19.3</span> Boolean Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-boolean-constructor" title="The Boolean Constructor"><span class="secnum">19.3.1</span> The Boolean Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-boolean-constructor-boolean-value" title="Boolean ( value )"><span class="secnum">19.3.1.1</span> Boolean ( <var>value</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-boolean-constructor" title="Properties of the Boolean Constructor"><span class="secnum">19.3.2</span> Properties of the Boolean Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-boolean.prototype" title="Boolean.prototype"><span class="secnum">19.3.2.1</span> Boolean.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-boolean-prototype-object" title="Properties of the Boolean Prototype Object"><span class="secnum">19.3.3</span> Properties of the Boolean Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-boolean.prototype.constructor" title="Boolean.prototype.constructor"><span class="secnum">19.3.3.1</span> Boolean.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-boolean.prototype.tostring" title="Boolean.prototype.toString ( )"><span class="secnum">19.3.3.2</span> Boolean.prototype.toString ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-boolean.prototype.valueof" title="Boolean.prototype.valueOf ( )"><span class="secnum">19.3.3.3</span> Boolean.prototype.valueOf ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-boolean-instances" title="Properties of Boolean Instances"><span class="secnum">19.3.4</span> Properties of Boolean Instances</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-symbol-objects" title="Symbol Objects"><span class="secnum">19.4</span> Symbol Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-symbol-constructor" title="The Symbol Constructor"><span class="secnum">19.4.1</span> The Symbol Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-symbol-description" title="Symbol ( [ description ] )"><span class="secnum">19.4.1.1</span> Symbol ( [ <var>description</var> ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-symbol-constructor" title="Properties of the Symbol Constructor"><span class="secnum">19.4.2</span> Properties of the Symbol Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-symbol.asynciterator" title="Symbol.asyncIterator"><span class="secnum">19.4.2.1</span> Symbol.asyncIterator</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.for" title="Symbol.for ( key )"><span class="secnum">19.4.2.2</span> Symbol.for ( <var>key</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.hasinstance" title="Symbol.hasInstance"><span class="secnum">19.4.2.3</span> Symbol.hasInstance</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.isconcatspreadable" title="Symbol.isConcatSpreadable"><span class="secnum">19.4.2.4</span> Symbol.isConcatSpreadable</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.iterator" title="Symbol.iterator"><span class="secnum">19.4.2.5</span> Symbol.iterator</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.keyfor" title="Symbol.keyFor ( sym )"><span class="secnum">19.4.2.6</span> Symbol.keyFor ( <var>sym</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.match" title="Symbol.match"><span class="secnum">19.4.2.7</span> Symbol.match</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.matchall" title="Symbol.matchAll"><span class="secnum">19.4.2.8</span> Symbol.matchAll</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.prototype" title="Symbol.prototype"><span class="secnum">19.4.2.9</span> Symbol.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.replace" title="Symbol.replace"><span class="secnum">19.4.2.10</span> Symbol.replace</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.search" title="Symbol.search"><span class="secnum">19.4.2.11</span> Symbol.search</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.species" title="Symbol.species"><span class="secnum">19.4.2.12</span> Symbol.species</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.split" title="Symbol.split"><span class="secnum">19.4.2.13</span> Symbol.split</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.toprimitive" title="Symbol.toPrimitive"><span class="secnum">19.4.2.14</span> Symbol.toPrimitive</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.tostringtag" title="Symbol.toStringTag"><span class="secnum">19.4.2.15</span> Symbol.toStringTag</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.unscopables" title="Symbol.unscopables"><span class="secnum">19.4.2.16</span> Symbol.unscopables</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-symbol-prototype-object" title="Properties of the Symbol Prototype Object"><span class="secnum">19.4.3</span> Properties of the Symbol Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-symbol.prototype.constructor" title="Symbol.prototype.constructor"><span class="secnum">19.4.3.1</span> Symbol.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.prototype.description" title="get Symbol.prototype.description"><span class="secnum">19.4.3.2</span> get Symbol.prototype.description</a></li><li><span class="item-toggle">◢</span><a href="#sec-symbol.prototype.tostring" title="Symbol.prototype.toString ( )"><span class="secnum">19.4.3.3</span> Symbol.prototype.toString ( )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-symboldescriptivestring" title="SymbolDescriptiveString ( sym )"><span class="secnum">19.4.3.3.1</span> SymbolDescriptiveString ( <var>sym</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.prototype.valueof" title="Symbol.prototype.valueOf ( )"><span class="secnum">19.4.3.4</span> Symbol.prototype.valueOf ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.prototype-@@toprimitive" title="Symbol.prototype [ @@toPrimitive ] ( hint )"><span class="secnum">19.4.3.5</span> Symbol.prototype [ @@toPrimitive ] ( <var>hint</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-symbol.prototype-@@tostringtag" title="Symbol.prototype [ @@toStringTag ]"><span class="secnum">19.4.3.6</span> Symbol.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-symbol-instances" title="Properties of Symbol Instances"><span class="secnum">19.4.4</span> Properties of Symbol Instances</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-error-objects" title="Error Objects"><span class="secnum">19.5</span> Error Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-error-constructor" title="The Error Constructor"><span class="secnum">19.5.1</span> The Error Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-error-message" title="Error ( message )"><span class="secnum">19.5.1.1</span> Error ( <var>message</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-error-constructor" title="Properties of the Error Constructor"><span class="secnum">19.5.2</span> Properties of the Error Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-error.prototype" title="Error.prototype"><span class="secnum">19.5.2.1</span> Error.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-error-prototype-object" title="Properties of the Error Prototype Object"><span class="secnum">19.5.3</span> Properties of the Error Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-error.prototype.constructor" title="Error.prototype.constructor"><span class="secnum">19.5.3.1</span> Error.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-error.prototype.message" title="Error.prototype.message"><span class="secnum">19.5.3.2</span> Error.prototype.message</a></li><li><span class="item-toggle-none"></span><a href="#sec-error.prototype.name" title="Error.prototype.name"><span class="secnum">19.5.3.3</span> Error.prototype.name</a></li><li><span class="item-toggle-none"></span><a href="#sec-error.prototype.tostring" title="Error.prototype.toString ( )"><span class="secnum">19.5.3.4</span> Error.prototype.toString ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-error-instances" title="Properties of Error Instances"><span class="secnum">19.5.4</span> Properties of Error Instances</a></li><li><span class="item-toggle">◢</span><a href="#sec-native-error-types-used-in-this-standard" title="Native Error Types Used in This Standard"><span class="secnum">19.5.5</span> Native Error Types Used in This Standard</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-native-error-types-used-in-this-standard-evalerror" title="EvalError"><span class="secnum">19.5.5.1</span> EvalError</a></li><li><span class="item-toggle-none"></span><a href="#sec-native-error-types-used-in-this-standard-rangeerror" title="RangeError"><span class="secnum">19.5.5.2</span> RangeError</a></li><li><span class="item-toggle-none"></span><a href="#sec-native-error-types-used-in-this-standard-referenceerror" title="ReferenceError"><span class="secnum">19.5.5.3</span> ReferenceError</a></li><li><span class="item-toggle-none"></span><a href="#sec-native-error-types-used-in-this-standard-syntaxerror" title="SyntaxError"><span class="secnum">19.5.5.4</span> SyntaxError</a></li><li><span class="item-toggle-none"></span><a href="#sec-native-error-types-used-in-this-standard-typeerror" title="TypeError"><span class="secnum">19.5.5.5</span> TypeError</a></li><li><span class="item-toggle-none"></span><a href="#sec-native-error-types-used-in-this-standard-urierror" title="URIError"><span class="secnum">19.5.5.6</span> URIError</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-nativeerror-object-structure" title="NativeError Object Structure"><span class="secnum">19.5.6</span> <var>NativeError</var> Object Structure</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-nativeerror-constructors" title="The NativeError Constructors"><span class="secnum">19.5.6.1</span> The <var>NativeError</var> Constructors</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-nativeerror" title="NativeError ( message )"><span class="secnum">19.5.6.1.1</span> <var>NativeError</var> ( <var>message</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-nativeerror-constructors" title="Properties of the NativeError Constructors"><span class="secnum">19.5.6.2</span> Properties of the <var>NativeError</var> Constructors</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-nativeerror.prototype" title="NativeError.prototype"><span class="secnum">19.5.6.2.1</span> <var>NativeError</var>.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-nativeerror-prototype-objects" title="Properties of the NativeError Prototype Objects"><span class="secnum">19.5.6.3</span> Properties of the <var>NativeError</var> Prototype Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-nativeerror.prototype.constructor" title="NativeError.prototype.constructor"><span class="secnum">19.5.6.3.1</span> <var>NativeError</var>.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-nativeerror.prototype.message" title="NativeError.prototype.message"><span class="secnum">19.5.6.3.2</span> <var>NativeError</var>.prototype.message</a></li><li><span class="item-toggle-none"></span><a href="#sec-nativeerror.prototype.name" title="NativeError.prototype.name"><span class="secnum">19.5.6.3.3</span> <var>NativeError</var>.prototype.name</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-nativeerror-instances" title="Properties of NativeError Instances"><span class="secnum">19.5.6.4</span> Properties of <var>NativeError</var> Instances</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-aggregate-error-objects" title="AggregateError Objects"><span class="secnum">19.5.7</span> AggregateError Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-aggregate-error-constructor" title="The AggregateError Constructor"><span class="secnum">19.5.7.1</span> The AggregateError Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-aggregate-error" title="AggregateError ( errors, message )"><span class="secnum">19.5.7.1.1</span> AggregateError ( <var>errors</var>, <var>message</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-aggregate-error-constructors" title="Properties of the AggregateError Constructor"><span class="secnum">19.5.7.2</span> Properties of the AggregateError Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-aggregate-error.prototype" title="AggregateError.prototype"><span class="secnum">19.5.7.2.1</span> AggregateError.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-aggregate-error-prototype-objects" title="Properties of the AggregateError Prototype Object"><span class="secnum">19.5.7.3</span> Properties of the AggregateError Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-aggregate-error.prototype.constructor" title="AggregateError.prototype.constructor"><span class="secnum">19.5.7.3.1</span> AggregateError.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-aggregate-error.prototype.message" title="AggregateError.prototype.message"><span class="secnum">19.5.7.3.2</span> AggregateError.prototype.message</a></li><li><span class="item-toggle-none"></span><a href="#sec-aggregate-error.prototype.name" title="AggregateError.prototype.name"><span class="secnum">19.5.7.3.3</span> AggregateError.prototype.name</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-aggregate-error-instances" title="Properties of AggregateError Instances"><span class="secnum">19.5.7.4</span> Properties of AggregateError Instances</a></li></ol></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-numbers-and-dates" title="Numbers and Dates"><span class="secnum">20</span> Numbers and Dates</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-number-objects" title="Number Objects"><span class="secnum">20.1</span> Number Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-number-constructor" title="The Number Constructor"><span class="secnum">20.1.1</span> The Number Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-number-constructor-number-value" title="Number ( value )"><span class="secnum">20.1.1.1</span> Number ( <var>value</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-number-constructor" title="Properties of the Number Constructor"><span class="secnum">20.1.2</span> Properties of the Number Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-number.epsilon" title="Number.EPSILON"><span class="secnum">20.1.2.1</span> Number.EPSILON</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.isfinite" title="Number.isFinite ( number )"><span class="secnum">20.1.2.2</span> Number.isFinite ( <var>number</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.isinteger" title="Number.isInteger ( number )"><span class="secnum">20.1.2.3</span> Number.isInteger ( <var>number</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.isnan" title="Number.isNaN ( number )"><span class="secnum">20.1.2.4</span> Number.isNaN ( <var>number</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.issafeinteger" title="Number.isSafeInteger ( number )"><span class="secnum">20.1.2.5</span> Number.isSafeInteger ( <var>number</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.max_safe_integer" title="Number.MAX_SAFE_INTEGER"><span class="secnum">20.1.2.6</span> Number.MAX_SAFE_INTEGER</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.max_value" title="Number.MAX_VALUE"><span class="secnum">20.1.2.7</span> Number.MAX_VALUE</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.min_safe_integer" title="Number.MIN_SAFE_INTEGER"><span class="secnum">20.1.2.8</span> Number.MIN_SAFE_INTEGER</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.min_value" title="Number.MIN_VALUE"><span class="secnum">20.1.2.9</span> Number.MIN_VALUE</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.nan" title="Number.NaN"><span class="secnum">20.1.2.10</span> Number.NaN</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.negative_infinity" title="Number.NEGATIVE_INFINITY"><span class="secnum">20.1.2.11</span> Number.NEGATIVE_INFINITY</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.parsefloat" title="Number.parseFloat ( string )"><span class="secnum">20.1.2.12</span> Number.parseFloat ( <var>string</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.parseint" title="Number.parseInt ( string, radix )"><span class="secnum">20.1.2.13</span> Number.parseInt ( <var>string</var>, <var>radix</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.positive_infinity" title="Number.POSITIVE_INFINITY"><span class="secnum">20.1.2.14</span> Number.POSITIVE_INFINITY</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.prototype" title="Number.prototype"><span class="secnum">20.1.2.15</span> Number.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-number-prototype-object" title="Properties of the Number Prototype Object"><span class="secnum">20.1.3</span> Properties of the Number Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-number.prototype.constructor" title="Number.prototype.constructor"><span class="secnum">20.1.3.1</span> Number.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.prototype.toexponential" title="Number.prototype.toExponential ( fractionDigits )"><span class="secnum">20.1.3.2</span> Number.prototype.toExponential ( <var>fractionDigits</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.prototype.tofixed" title="Number.prototype.toFixed ( fractionDigits )"><span class="secnum">20.1.3.3</span> Number.prototype.toFixed ( <var>fractionDigits</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.prototype.tolocalestring" title="Number.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )"><span class="secnum">20.1.3.4</span> Number.prototype.toLocaleString ( [ <var>reserved1</var> [ , <var>reserved2</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.prototype.toprecision" title="Number.prototype.toPrecision ( precision )"><span class="secnum">20.1.3.5</span> Number.prototype.toPrecision ( <var>precision</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.prototype.tostring" title="Number.prototype.toString ( [ radix ] )"><span class="secnum">20.1.3.6</span> Number.prototype.toString ( [ <var>radix</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-number.prototype.valueof" title="Number.prototype.valueOf ( )"><span class="secnum">20.1.3.7</span> Number.prototype.valueOf ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-number-instances" title="Properties of Number Instances"><span class="secnum">20.1.4</span> Properties of Number Instances</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-bigint-objects" title="BigInt Objects"><span class="secnum">20.2</span> BigInt Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-bigint-constructor" title="The BigInt Constructor"><span class="secnum">20.2.1</span> The BigInt Constructor</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-bigint-constructor-number-value" title="BigInt ( value )"><span class="secnum">20.2.1.1</span> BigInt ( <var>value</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-numbertobigint" title="NumberToBigInt ( number )"><span class="secnum">20.2.1.1.1</span> NumberToBigInt ( <var>number</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-bigint-constructor" title="Properties of the BigInt Constructor"><span class="secnum">20.2.2</span> Properties of the BigInt Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-bigint.asintn" title="BigInt.asIntN ( bits, bigint )"><span class="secnum">20.2.2.1</span> BigInt.asIntN ( <var>bits</var>, <var>bigint</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-bigint.asuintn" title="BigInt.asUintN ( bits, bigint )"><span class="secnum">20.2.2.2</span> BigInt.asUintN ( <var>bits</var>, <var>bigint</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-bigint.prototype" title="BigInt.prototype"><span class="secnum">20.2.2.3</span> BigInt.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-bigint-prototype-object" title="Properties of the BigInt Prototype Object"><span class="secnum">20.2.3</span> Properties of the BigInt Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-bigint.prototype.constructor" title="BigInt.prototype.constructor"><span class="secnum">20.2.3.1</span> BigInt.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-bigint.prototype.tolocalestring" title="BigInt.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )"><span class="secnum">20.2.3.2</span> BigInt.prototype.toLocaleString ( [ <var>reserved1</var> [ , <var>reserved2</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-bigint.prototype.tostring" title="BigInt.prototype.toString ( [ radix ] )"><span class="secnum">20.2.3.3</span> BigInt.prototype.toString ( [ <var>radix</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-bigint.prototype.valueof" title="BigInt.prototype.valueOf ( )"><span class="secnum">20.2.3.4</span> BigInt.prototype.valueOf ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-bigint.prototype-@@tostringtag" title="BigInt.prototype [ @@toStringTag ]"><span class="secnum">20.2.3.5</span> BigInt.prototype [ @@toStringTag ]</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-math-object" title="The Math Object"><span class="secnum">20.3</span> The Math Object</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-value-properties-of-the-math-object" title="Value Properties of the Math Object"><span class="secnum">20.3.1</span> Value Properties of the Math Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-math.e" title="Math.E"><span class="secnum">20.3.1.1</span> Math.E</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.ln10" title="Math.LN10"><span class="secnum">20.3.1.2</span> Math.LN10</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.ln2" title="Math.LN2"><span class="secnum">20.3.1.3</span> Math.LN2</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.log10e" title="Math.LOG10E"><span class="secnum">20.3.1.4</span> Math.LOG10E</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.log2e" title="Math.LOG2E"><span class="secnum">20.3.1.5</span> Math.LOG2E</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.pi" title="Math.PI"><span class="secnum">20.3.1.6</span> Math.PI</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.sqrt1_2" title="Math.SQRT1_2"><span class="secnum">20.3.1.7</span> Math.SQRT1_2</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.sqrt2" title="Math.SQRT2"><span class="secnum">20.3.1.8</span> Math.SQRT2</a></li><li><span class="item-toggle-none"></span><a href="#sec-math-@@tostringtag" title="Math [ @@toStringTag ]"><span class="secnum">20.3.1.9</span> Math [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-function-properties-of-the-math-object" title="Function Properties of the Math Object"><span class="secnum">20.3.2</span> Function Properties of the Math Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-math.abs" title="Math.abs ( x )"><span class="secnum">20.3.2.1</span> Math.abs ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.acos" title="Math.acos ( x )"><span class="secnum">20.3.2.2</span> Math.acos ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.acosh" title="Math.acosh ( x )"><span class="secnum">20.3.2.3</span> Math.acosh ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.asin" title="Math.asin ( x )"><span class="secnum">20.3.2.4</span> Math.asin ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.asinh" title="Math.asinh ( x )"><span class="secnum">20.3.2.5</span> Math.asinh ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.atan" title="Math.atan ( x )"><span class="secnum">20.3.2.6</span> Math.atan ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.atanh" title="Math.atanh ( x )"><span class="secnum">20.3.2.7</span> Math.atanh ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.atan2" title="Math.atan2 ( y, x )"><span class="secnum">20.3.2.8</span> Math.atan2 ( <var>y</var>, <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.cbrt" title="Math.cbrt ( x )"><span class="secnum">20.3.2.9</span> Math.cbrt ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.ceil" title="Math.ceil ( x )"><span class="secnum">20.3.2.10</span> Math.ceil ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.clz32" title="Math.clz32 ( x )"><span class="secnum">20.3.2.11</span> Math.clz32 ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.cos" title="Math.cos ( x )"><span class="secnum">20.3.2.12</span> Math.cos ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.cosh" title="Math.cosh ( x )"><span class="secnum">20.3.2.13</span> Math.cosh ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.exp" title="Math.exp ( x )"><span class="secnum">20.3.2.14</span> Math.exp ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.expm1" title="Math.expm1 ( x )"><span class="secnum">20.3.2.15</span> Math.expm1 ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.floor" title="Math.floor ( x )"><span class="secnum">20.3.2.16</span> Math.floor ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.fround" title="Math.fround ( x )"><span class="secnum">20.3.2.17</span> Math.fround ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.hypot" title="Math.hypot ( ...args )"><span class="secnum">20.3.2.18</span> Math.hypot ( ...<var>args</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.imul" title="Math.imul ( x, y )"><span class="secnum">20.3.2.19</span> Math.imul ( <var>x</var>, <var>y</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.log" title="Math.log ( x )"><span class="secnum">20.3.2.20</span> Math.log ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.log1p" title="Math.log1p ( x )"><span class="secnum">20.3.2.21</span> Math.log1p ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.log10" title="Math.log10 ( x )"><span class="secnum">20.3.2.22</span> Math.log10 ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.log2" title="Math.log2 ( x )"><span class="secnum">20.3.2.23</span> Math.log2 ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.max" title="Math.max ( ...args )"><span class="secnum">20.3.2.24</span> Math.max ( ...<var>args</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.min" title="Math.min ( ...args )"><span class="secnum">20.3.2.25</span> Math.min ( ...<var>args</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.pow" title="Math.pow ( base, exponent )"><span class="secnum">20.3.2.26</span> Math.pow ( <var>base</var>, <var>exponent</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.random" title="Math.random ( )"><span class="secnum">20.3.2.27</span> Math.random ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.round" title="Math.round ( x )"><span class="secnum">20.3.2.28</span> Math.round ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.sign" title="Math.sign ( x )"><span class="secnum">20.3.2.29</span> Math.sign ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.sin" title="Math.sin ( x )"><span class="secnum">20.3.2.30</span> Math.sin ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.sinh" title="Math.sinh ( x )"><span class="secnum">20.3.2.31</span> Math.sinh ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.sqrt" title="Math.sqrt ( x )"><span class="secnum">20.3.2.32</span> Math.sqrt ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.tan" title="Math.tan ( x )"><span class="secnum">20.3.2.33</span> Math.tan ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.tanh" title="Math.tanh ( x )"><span class="secnum">20.3.2.34</span> Math.tanh ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-math.trunc" title="Math.trunc ( x )"><span class="secnum">20.3.2.35</span> Math.trunc ( <var>x</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-date-objects" title="Date Objects"><span class="secnum">20.4</span> Date Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-overview-of-date-objects-and-definitions-of-abstract-operations" title="Overview of Date Objects and Definitions of Abstract Operations"><span class="secnum">20.4.1</span> Overview of Date Objects and Definitions of Abstract Operations</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-time-values-and-time-range" title="Time Values and Time Range"><span class="secnum">20.4.1.1</span> Time Values and Time Range</a></li><li><span class="item-toggle-none"></span><a href="#sec-day-number-and-time-within-day" title="Day Number and Time within Day"><span class="secnum">20.4.1.2</span> Day Number and Time within Day</a></li><li><span class="item-toggle-none"></span><a href="#sec-year-number" title="Year Number"><span class="secnum">20.4.1.3</span> Year Number</a></li><li><span class="item-toggle-none"></span><a href="#sec-month-number" title="Month Number"><span class="secnum">20.4.1.4</span> Month Number</a></li><li><span class="item-toggle-none"></span><a href="#sec-date-number" title="Date Number"><span class="secnum">20.4.1.5</span> Date Number</a></li><li><span class="item-toggle-none"></span><a href="#sec-week-day" title="Week Day"><span class="secnum">20.4.1.6</span> Week Day</a></li><li><span class="item-toggle-none"></span><a href="#sec-local-time-zone-adjustment" title="LocalTZA ( t, isUTC )"><span class="secnum">20.4.1.7</span> LocalTZA ( <var>t</var>, <var>isUTC</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-localtime" title="LocalTime ( t )"><span class="secnum">20.4.1.8</span> LocalTime ( <var>t</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-utc-t" title="UTC ( t )"><span class="secnum">20.4.1.9</span> UTC ( <var>t</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hours-minutes-second-and-milliseconds" title="Hours, Minutes, Second, and Milliseconds"><span class="secnum">20.4.1.10</span> Hours, Minutes, Second, and Milliseconds</a></li><li><span class="item-toggle-none"></span><a href="#sec-maketime" title="MakeTime ( hour, min, sec, ms )"><span class="secnum">20.4.1.11</span> MakeTime ( <var>hour</var>, <var>min</var>, <var>sec</var>, <var>ms</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-makeday" title="MakeDay ( year, month, date )"><span class="secnum">20.4.1.12</span> MakeDay ( <var>year</var>, <var>month</var>, <var>date</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-makedate" title="MakeDate ( day, time )"><span class="secnum">20.4.1.13</span> MakeDate ( <var>day</var>, <var>time</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-timeclip" title="TimeClip ( time )"><span class="secnum">20.4.1.14</span> TimeClip ( <var>time</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-date-time-string-format" title="Date Time String Format"><span class="secnum">20.4.1.15</span> Date Time String Format</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-expanded-years" title="Expanded Years"><span class="secnum">20.4.1.15.1</span> Expanded Years</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-date-constructor" title="The Date Constructor"><span class="secnum">20.4.2</span> The Date Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-date-year-month-date-hours-minutes-seconds-ms" title="Date ( year, month [ , date [ , hours [ , minutes [ , seconds [ , ms ] ] ] ] ] )"><span class="secnum">20.4.2.1</span> Date ( <var>year</var>, <var>month</var> [ , <var>date</var> [ , <var>hours</var> [ , <var>minutes</var> [ , <var>seconds</var> [ , <var>ms</var> ] ] ] ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date-value" title="Date ( value )"><span class="secnum">20.4.2.2</span> Date ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date-constructor-date" title="Date ( )"><span class="secnum">20.4.2.3</span> Date ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-date-constructor" title="Properties of the Date Constructor"><span class="secnum">20.4.3</span> Properties of the Date Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-date.now" title="Date.now ( )"><span class="secnum">20.4.3.1</span> Date.now ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.parse" title="Date.parse ( string )"><span class="secnum">20.4.3.2</span> Date.parse ( <var>string</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype" title="Date.prototype"><span class="secnum">20.4.3.3</span> Date.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.utc" title="Date.UTC ( year [ , month [ , date [ , hours [ , minutes [ , seconds [ , ms ] ] ] ] ] ] )"><span class="secnum">20.4.3.4</span> Date.UTC ( <var>year</var> [ , <var>month</var> [ , <var>date</var> [ , <var>hours</var> [ , <var>minutes</var> [ , <var>seconds</var> [ , <var>ms</var> ] ] ] ] ] ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-date-prototype-object" title="Properties of the Date Prototype Object"><span class="secnum">20.4.4</span> Properties of the Date Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.constructor" title="Date.prototype.constructor"><span class="secnum">20.4.4.1</span> Date.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getdate" title="Date.prototype.getDate ( )"><span class="secnum">20.4.4.2</span> Date.prototype.getDate ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getday" title="Date.prototype.getDay ( )"><span class="secnum">20.4.4.3</span> Date.prototype.getDay ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getfullyear" title="Date.prototype.getFullYear ( )"><span class="secnum">20.4.4.4</span> Date.prototype.getFullYear ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.gethours" title="Date.prototype.getHours ( )"><span class="secnum">20.4.4.5</span> Date.prototype.getHours ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getmilliseconds" title="Date.prototype.getMilliseconds ( )"><span class="secnum">20.4.4.6</span> Date.prototype.getMilliseconds ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getminutes" title="Date.prototype.getMinutes ( )"><span class="secnum">20.4.4.7</span> Date.prototype.getMinutes ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getmonth" title="Date.prototype.getMonth ( )"><span class="secnum">20.4.4.8</span> Date.prototype.getMonth ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getseconds" title="Date.prototype.getSeconds ( )"><span class="secnum">20.4.4.9</span> Date.prototype.getSeconds ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.gettime" title="Date.prototype.getTime ( )"><span class="secnum">20.4.4.10</span> Date.prototype.getTime ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.gettimezoneoffset" title="Date.prototype.getTimezoneOffset ( )"><span class="secnum">20.4.4.11</span> Date.prototype.getTimezoneOffset ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getutcdate" title="Date.prototype.getUTCDate ( )"><span class="secnum">20.4.4.12</span> Date.prototype.getUTCDate ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getutcday" title="Date.prototype.getUTCDay ( )"><span class="secnum">20.4.4.13</span> Date.prototype.getUTCDay ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getutcfullyear" title="Date.prototype.getUTCFullYear ( )"><span class="secnum">20.4.4.14</span> Date.prototype.getUTCFullYear ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getutchours" title="Date.prototype.getUTCHours ( )"><span class="secnum">20.4.4.15</span> Date.prototype.getUTCHours ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getutcmilliseconds" title="Date.prototype.getUTCMilliseconds ( )"><span class="secnum">20.4.4.16</span> Date.prototype.getUTCMilliseconds ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getutcminutes" title="Date.prototype.getUTCMinutes ( )"><span class="secnum">20.4.4.17</span> Date.prototype.getUTCMinutes ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getutcmonth" title="Date.prototype.getUTCMonth ( )"><span class="secnum">20.4.4.18</span> Date.prototype.getUTCMonth ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getutcseconds" title="Date.prototype.getUTCSeconds ( )"><span class="secnum">20.4.4.19</span> Date.prototype.getUTCSeconds ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setdate" title="Date.prototype.setDate ( date )"><span class="secnum">20.4.4.20</span> Date.prototype.setDate ( <var>date</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setfullyear" title="Date.prototype.setFullYear ( year [ , month [ , date ] ] )"><span class="secnum">20.4.4.21</span> Date.prototype.setFullYear ( <var>year</var> [ , <var>month</var> [ , <var>date</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.sethours" title="Date.prototype.setHours ( hour [ , min [ , sec [ , ms ] ] ] )"><span class="secnum">20.4.4.22</span> Date.prototype.setHours ( <var>hour</var> [ , <var>min</var> [ , <var>sec</var> [ , <var>ms</var> ] ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setmilliseconds" title="Date.prototype.setMilliseconds ( ms )"><span class="secnum">20.4.4.23</span> Date.prototype.setMilliseconds ( <var>ms</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setminutes" title="Date.prototype.setMinutes ( min [ , sec [ , ms ] ] )"><span class="secnum">20.4.4.24</span> Date.prototype.setMinutes ( <var>min</var> [ , <var>sec</var> [ , <var>ms</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setmonth" title="Date.prototype.setMonth ( month [ , date ] )"><span class="secnum">20.4.4.25</span> Date.prototype.setMonth ( <var>month</var> [ , <var>date</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setseconds" title="Date.prototype.setSeconds ( sec [ , ms ] )"><span class="secnum">20.4.4.26</span> Date.prototype.setSeconds ( <var>sec</var> [ , <var>ms</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.settime" title="Date.prototype.setTime ( time )"><span class="secnum">20.4.4.27</span> Date.prototype.setTime ( <var>time</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setutcdate" title="Date.prototype.setUTCDate ( date )"><span class="secnum">20.4.4.28</span> Date.prototype.setUTCDate ( <var>date</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setutcfullyear" title="Date.prototype.setUTCFullYear ( year [ , month [ , date ] ] )"><span class="secnum">20.4.4.29</span> Date.prototype.setUTCFullYear ( <var>year</var> [ , <var>month</var> [ , <var>date</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setutchours" title="Date.prototype.setUTCHours ( hour [ , min [ , sec [ , ms ] ] ] )"><span class="secnum">20.4.4.30</span> Date.prototype.setUTCHours ( <var>hour</var> [ , <var>min</var> [ , <var>sec</var> [ , <var>ms</var> ] ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setutcmilliseconds" title="Date.prototype.setUTCMilliseconds ( ms )"><span class="secnum">20.4.4.31</span> Date.prototype.setUTCMilliseconds ( <var>ms</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setutcminutes" title="Date.prototype.setUTCMinutes ( min [ , sec [ , ms ] ] )"><span class="secnum">20.4.4.32</span> Date.prototype.setUTCMinutes ( <var>min</var> [ , <var>sec</var> [ , <var>ms</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setutcmonth" title="Date.prototype.setUTCMonth ( month [ , date ] )"><span class="secnum">20.4.4.33</span> Date.prototype.setUTCMonth ( <var>month</var> [ , <var>date</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setutcseconds" title="Date.prototype.setUTCSeconds ( sec [ , ms ] )"><span class="secnum">20.4.4.34</span> Date.prototype.setUTCSeconds ( <var>sec</var> [ , <var>ms</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.todatestring" title="Date.prototype.toDateString ( )"><span class="secnum">20.4.4.35</span> Date.prototype.toDateString ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.toisostring" title="Date.prototype.toISOString ( )"><span class="secnum">20.4.4.36</span> Date.prototype.toISOString ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.tojson" title="Date.prototype.toJSON ( key )"><span class="secnum">20.4.4.37</span> Date.prototype.toJSON ( <var>key</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.tolocaledatestring" title="Date.prototype.toLocaleDateString ( [ reserved1 [ , reserved2 ] ] )"><span class="secnum">20.4.4.38</span> Date.prototype.toLocaleDateString ( [ <var>reserved1</var> [ , <var>reserved2</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.tolocalestring" title="Date.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )"><span class="secnum">20.4.4.39</span> Date.prototype.toLocaleString ( [ <var>reserved1</var> [ , <var>reserved2</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.tolocaletimestring" title="Date.prototype.toLocaleTimeString ( [ reserved1 [ , reserved2 ] ] )"><span class="secnum">20.4.4.40</span> Date.prototype.toLocaleTimeString ( [ <var>reserved1</var> [ , <var>reserved2</var> ] ] )</a></li><li><span class="item-toggle">◢</span><a href="#sec-date.prototype.tostring" title="Date.prototype.toString ( )"><span class="secnum">20.4.4.41</span> Date.prototype.toString ( )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-timestring" title="TimeString ( tv )"><span class="secnum">20.4.4.41.1</span> TimeString ( <var>tv</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-datestring" title="DateString ( tv )"><span class="secnum">20.4.4.41.2</span> DateString ( <var>tv</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-timezoneestring" title="TimeZoneString ( tv )"><span class="secnum">20.4.4.41.3</span> TimeZoneString ( <var>tv</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-todatestring" title="ToDateString ( tv )"><span class="secnum">20.4.4.41.4</span> ToDateString ( <var>tv</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.totimestring" title="Date.prototype.toTimeString ( )"><span class="secnum">20.4.4.42</span> Date.prototype.toTimeString ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.toutcstring" title="Date.prototype.toUTCString ( )"><span class="secnum">20.4.4.43</span> Date.prototype.toUTCString ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.valueof" title="Date.prototype.valueOf ( )"><span class="secnum">20.4.4.44</span> Date.prototype.valueOf ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype-@@toprimitive" title="Date.prototype [ @@toPrimitive ] ( hint )"><span class="secnum">20.4.4.45</span> Date.prototype [ @@toPrimitive ] ( <var>hint</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-date-instances" title="Properties of Date Instances"><span class="secnum">20.4.5</span> Properties of Date Instances</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-text-processing" title="Text Processing"><span class="secnum">21</span> Text Processing</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-string-objects" title="String Objects"><span class="secnum">21.1</span> String Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-string-constructor" title="The String Constructor"><span class="secnum">21.1.1</span> The String Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-string-constructor-string-value" title="String ( value )"><span class="secnum">21.1.1.1</span> String ( <var>value</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-string-constructor" title="Properties of the String Constructor"><span class="secnum">21.1.2</span> Properties of the String Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-string.fromcharcode" title="String.fromCharCode ( ...codeUnits )"><span class="secnum">21.1.2.1</span> String.fromCharCode ( ...<var>codeUnits</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.fromcodepoint" title="String.fromCodePoint ( ...codePoints )"><span class="secnum">21.1.2.2</span> String.fromCodePoint ( ...<var>codePoints</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype" title="String.prototype"><span class="secnum">21.1.2.3</span> String.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.raw" title="String.raw ( template, ...substitutions )"><span class="secnum">21.1.2.4</span> String.raw ( <var>template</var>, ...<var>substitutions</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-string-prototype-object" title="Properties of the String Prototype Object"><span class="secnum">21.1.3</span> Properties of the String Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.charat" title="String.prototype.charAt ( pos )"><span class="secnum">21.1.3.1</span> String.prototype.charAt ( <var>pos</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.charcodeat" title="String.prototype.charCodeAt ( pos )"><span class="secnum">21.1.3.2</span> String.prototype.charCodeAt ( <var>pos</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.codepointat" title="String.prototype.codePointAt ( pos )"><span class="secnum">21.1.3.3</span> String.prototype.codePointAt ( <var>pos</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.concat" title="String.prototype.concat ( ...args )"><span class="secnum">21.1.3.4</span> String.prototype.concat ( ...<var>args</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.constructor" title="String.prototype.constructor"><span class="secnum">21.1.3.5</span> String.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.endswith" title="String.prototype.endsWith ( searchString [ , endPosition ] )"><span class="secnum">21.1.3.6</span> String.prototype.endsWith ( <var>searchString</var> [ , <var>endPosition</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.includes" title="String.prototype.includes ( searchString [ , position ] )"><span class="secnum">21.1.3.7</span> String.prototype.includes ( <var>searchString</var> [ , <var>position</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.indexof" title="String.prototype.indexOf ( searchString [ , position ] )"><span class="secnum">21.1.3.8</span> String.prototype.indexOf ( <var>searchString</var> [ , <var>position</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.lastindexof" title="String.prototype.lastIndexOf ( searchString [ , position ] )"><span class="secnum">21.1.3.9</span> String.prototype.lastIndexOf ( <var>searchString</var> [ , <var>position</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.localecompare" title="String.prototype.localeCompare ( that [ , reserved1 [ , reserved2 ] ] )"><span class="secnum">21.1.3.10</span> String.prototype.localeCompare ( <var>that</var> [ , <var>reserved1</var> [ , <var>reserved2</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.match" title="String.prototype.match ( regexp )"><span class="secnum">21.1.3.11</span> String.prototype.match ( <var>regexp</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.matchall" title="String.prototype.matchAll ( regexp )"><span class="secnum">21.1.3.12</span> String.prototype.matchAll ( <var>regexp</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.normalize" title="String.prototype.normalize ( [ form ] )"><span class="secnum">21.1.3.13</span> String.prototype.normalize ( [ <var>form</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.padend" title="String.prototype.padEnd ( maxLength [ , fillString ] )"><span class="secnum">21.1.3.14</span> String.prototype.padEnd ( <var>maxLength</var> [ , <var>fillString</var> ] )</a></li><li><span class="item-toggle">◢</span><a href="#sec-string.prototype.padstart" title="String.prototype.padStart ( maxLength [ , fillString ] )"><span class="secnum">21.1.3.15</span> String.prototype.padStart ( <var>maxLength</var> [ , <var>fillString</var> ] )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-stringpad" title="StringPad ( O, maxLength, fillString, placement )"><span class="secnum">21.1.3.15.1</span> StringPad ( <var>O</var>, <var>maxLength</var>, <var>fillString</var>, <var>placement</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.repeat" title="String.prototype.repeat ( count )"><span class="secnum">21.1.3.16</span> String.prototype.repeat ( <var>count</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-string.prototype.replace" title="String.prototype.replace ( searchValue, replaceValue )"><span class="secnum">21.1.3.17</span> String.prototype.replace ( <var>searchValue</var>, <var>replaceValue</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-getsubstitution" title="GetSubstitution ( matched, str, position, captures, namedCaptures, replacement )"><span class="secnum">21.1.3.17.1</span> GetSubstitution ( <var>matched</var>, <var>str</var>, <var>position</var>, <var>captures</var>, <var>namedCaptures</var>, <var>replacement</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.replaceall" title="String.prototype.replaceAll ( searchValue, replaceValue )"><span class="secnum">21.1.3.18</span> String.prototype.replaceAll ( <var>searchValue</var>, <var>replaceValue</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.search" title="String.prototype.search ( regexp )"><span class="secnum">21.1.3.19</span> String.prototype.search ( <var>regexp</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.slice" title="String.prototype.slice ( start, end )"><span class="secnum">21.1.3.20</span> String.prototype.slice ( <var>start</var>, <var>end</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-string.prototype.split" title="String.prototype.split ( separator, limit )"><span class="secnum">21.1.3.21</span> String.prototype.split ( <var>separator</var>, <var>limit</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-splitmatch" title="SplitMatch ( S, q, R )"><span class="secnum">21.1.3.21.1</span> SplitMatch ( <var>S</var>, <var>q</var>, <var>R</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.startswith" title="String.prototype.startsWith ( searchString [ , position ] )"><span class="secnum">21.1.3.22</span> String.prototype.startsWith ( <var>searchString</var> [ , <var>position</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.substring" title="String.prototype.substring ( start, end )"><span class="secnum">21.1.3.23</span> String.prototype.substring ( <var>start</var>, <var>end</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.tolocalelowercase" title="String.prototype.toLocaleLowerCase ( [ reserved1 [ , reserved2 ] ] )"><span class="secnum">21.1.3.24</span> String.prototype.toLocaleLowerCase ( [ <var>reserved1</var> [ , <var>reserved2</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.tolocaleuppercase" title="String.prototype.toLocaleUpperCase ( [ reserved1 [ , reserved2 ] ] )"><span class="secnum">21.1.3.25</span> String.prototype.toLocaleUpperCase ( [ <var>reserved1</var> [ , <var>reserved2</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.tolowercase" title="String.prototype.toLowerCase ( )"><span class="secnum">21.1.3.26</span> String.prototype.toLowerCase ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.tostring" title="String.prototype.toString ( )"><span class="secnum">21.1.3.27</span> String.prototype.toString ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.touppercase" title="String.prototype.toUpperCase ( )"><span class="secnum">21.1.3.28</span> String.prototype.toUpperCase ( )</a></li><li><span class="item-toggle">◢</span><a href="#sec-string.prototype.trim" title="String.prototype.trim ( )"><span class="secnum">21.1.3.29</span> String.prototype.trim ( )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-trimstring" title="TrimString ( string, where )"><span class="secnum">21.1.3.29.1</span> TrimString ( <var>string</var>, <var>where</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.trimend" title="String.prototype.trimEnd ( )"><span class="secnum">21.1.3.30</span> String.prototype.trimEnd ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.trimstart" title="String.prototype.trimStart ( )"><span class="secnum">21.1.3.31</span> String.prototype.trimStart ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.valueof" title="String.prototype.valueOf ( )"><span class="secnum">21.1.3.32</span> String.prototype.valueOf ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype-@@iterator" title="String.prototype [ @@iterator ] ( )"><span class="secnum">21.1.3.33</span> String.prototype [ @@iterator ] ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-string-instances" title="Properties of String Instances"><span class="secnum">21.1.4</span> Properties of String Instances</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-properties-of-string-instances-length" title="length"><span class="secnum">21.1.4.1</span> length</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-string-iterator-objects" title="String Iterator Objects"><span class="secnum">21.1.5</span> String Iterator Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createstringiterator" title="CreateStringIterator ( string )"><span class="secnum">21.1.5.1</span> CreateStringIterator ( <var>string</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-%stringiteratorprototype%-object" title="The %StringIteratorPrototype% Object"><span class="secnum">21.1.5.2</span> The %StringIteratorPrototype% Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%stringiteratorprototype%.next" title="%StringIteratorPrototype%.next ( )"><span class="secnum">21.1.5.2.1</span> %StringIteratorPrototype%.next ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%stringiteratorprototype%-@@tostringtag" title="%StringIteratorPrototype% [ @@toStringTag ]"><span class="secnum">21.1.5.2.2</span> %StringIteratorPrototype% [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-string-iterator-instances" title="Properties of String Iterator Instances"><span class="secnum">21.1.5.3</span> Properties of String Iterator Instances</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-regexp-regular-expression-objects" title="RegExp (Regular Expression) Objects"><span class="secnum">21.2</span> RegExp (Regular Expression) Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-patterns" title="Patterns"><span class="secnum">21.2.1</span> Patterns</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-patterns-static-semantics-early-errors" title="Static Semantics: Early Errors"><span class="secnum">21.2.1.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-patterns-static-semantics-capturing-group-number" title="Static Semantics: CapturingGroupNumber"><span class="secnum">21.2.1.2</span> SS: CapturingGroupNumber</a></li><li><span class="item-toggle-none"></span><a href="#sec-patterns-static-semantics-is-character-class" title="Static Semantics: IsCharacterClass"><span class="secnum">21.2.1.3</span> SS: IsCharacterClass</a></li><li><span class="item-toggle-none"></span><a href="#sec-patterns-static-semantics-character-value" title="Static Semantics: CharacterValue"><span class="secnum">21.2.1.4</span> SS: CharacterValue</a></li><li><span class="item-toggle-none"></span><a href="#sec-static-semantics-sourcetext" title="Static Semantics: SourceText"><span class="secnum">21.2.1.5</span> SS: SourceText</a></li><li><span class="item-toggle-none"></span><a href="#sec-regexp-identifier-names-static-semantics-stringvalue" title="Static Semantics: StringValue"><span class="secnum">21.2.1.6</span> SS: StringValue</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-pattern-semantics" title="Pattern Semantics"><span class="secnum">21.2.2</span> Pattern Semantics</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-notation" title="Notation"><span class="secnum">21.2.2.1</span> Notation</a></li><li><span class="item-toggle-none"></span><a href="#sec-pattern" title="Pattern"><span class="secnum">21.2.2.2</span> Pattern</a></li><li><span class="item-toggle-none"></span><a href="#sec-disjunction" title="Disjunction"><span class="secnum">21.2.2.3</span> Disjunction</a></li><li><span class="item-toggle-none"></span><a href="#sec-alternative" title="Alternative"><span class="secnum">21.2.2.4</span> Alternative</a></li><li><span class="item-toggle">◢</span><a href="#sec-term" title="Term"><span class="secnum">21.2.2.5</span> Term</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-repeatmatcher-abstract-operation" title="RepeatMatcher ( m, min, max, greedy, x, c, parenIndex, parenCount )"><span class="secnum">21.2.2.5.1</span> RepeatMatcher ( <var>m</var>, <var>min</var>, <var>max</var>, <var>greedy</var>, <var>x</var>, <var>c</var>, <var>parenIndex</var>, <var>parenCount</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-assertion" title="Assertion"><span class="secnum">21.2.2.6</span> Assertion</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-iswordchar-abstract-operation" title="IsWordChar ( e )"><span class="secnum">21.2.2.6.1</span> IsWordChar ( <var>e</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-quantifier" title="Quantifier"><span class="secnum">21.2.2.7</span> Quantifier</a></li><li><span class="item-toggle">◢</span><a href="#sec-atom" title="Atom"><span class="secnum">21.2.2.8</span> Atom</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-charactersetmatcher-abstract-operation" title="CharacterSetMatcher ( A, invert, direction )"><span class="secnum">21.2.2.8.1</span> CharacterSetMatcher ( <var>A</var>, <var>invert</var>, <var>direction</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-canonicalize-ch" title="Canonicalize ( ch )"><span class="secnum">21.2.2.8.2</span> Canonicalize ( <var>ch</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-unicodematchproperty-p" title="UnicodeMatchProperty ( p )"><span class="secnum">21.2.2.8.3</span> UnicodeMatchProperty ( <var>p</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-unicodematchpropertyvalue-p-v" title="UnicodeMatchPropertyValue ( p, v )"><span class="secnum">21.2.2.8.4</span> UnicodeMatchPropertyValue ( <var>p</var>, <var>v</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-atomescape" title="AtomEscape"><span class="secnum">21.2.2.9</span> AtomEscape</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-backreference-matcher" title="BackreferenceMatcher ( n, direction )"><span class="secnum">21.2.2.9.1</span> BackreferenceMatcher ( <var>n</var>, <var>direction</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-characterescape" title="CharacterEscape"><span class="secnum">21.2.2.10</span> CharacterEscape</a></li><li><span class="item-toggle-none"></span><a href="#sec-decimalescape" title="DecimalEscape"><span class="secnum">21.2.2.11</span> DecimalEscape</a></li><li><span class="item-toggle-none"></span><a href="#sec-characterclassescape" title="CharacterClassEscape"><span class="secnum">21.2.2.12</span> CharacterClassEscape</a></li><li><span class="item-toggle-none"></span><a href="#sec-characterclass" title="CharacterClass"><span class="secnum">21.2.2.13</span> CharacterClass</a></li><li><span class="item-toggle-none"></span><a href="#sec-classranges" title="ClassRanges"><span class="secnum">21.2.2.14</span> ClassRanges</a></li><li><span class="item-toggle">◢</span><a href="#sec-nonemptyclassranges" title="NonemptyClassRanges"><span class="secnum">21.2.2.15</span> NonemptyClassRanges</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-characterrange-abstract-operation" title="CharacterRange ( A, B )"><span class="secnum">21.2.2.15.1</span> CharacterRange ( <var>A</var>, <var>B</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-nonemptyclassrangesnodash" title="NonemptyClassRangesNoDash"><span class="secnum">21.2.2.16</span> NonemptyClassRangesNoDash</a></li><li><span class="item-toggle-none"></span><a href="#sec-classatom" title="ClassAtom"><span class="secnum">21.2.2.17</span> ClassAtom</a></li><li><span class="item-toggle-none"></span><a href="#sec-classatomnodash" title="ClassAtomNoDash"><span class="secnum">21.2.2.18</span> ClassAtomNoDash</a></li><li><span class="item-toggle-none"></span><a href="#sec-classescape" title="ClassEscape"><span class="secnum">21.2.2.19</span> ClassEscape</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-regexp-constructor" title="The RegExp Constructor"><span class="secnum">21.2.3</span> The RegExp Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-regexp-pattern-flags" title="RegExp ( pattern, flags )"><span class="secnum">21.2.3.1</span> RegExp ( <var>pattern</var>, <var>flags</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-abstract-operations-for-the-regexp-constructor" title="Abstract Operations for the RegExp Constructor"><span class="secnum">21.2.3.2</span> Abstract Operations for the RegExp Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-regexpalloc" title="RegExpAlloc ( newTarget )"><span class="secnum">21.2.3.2.1</span> RegExpAlloc ( <var>newTarget</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-regexpinitialize" title="RegExpInitialize ( obj, pattern, flags )"><span class="secnum">21.2.3.2.2</span> RegExpInitialize ( <var>obj</var>, <var>pattern</var>, <var>flags</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-parsepattern" title="Static Semantics: ParsePattern ( patternText, u )"><span class="secnum">21.2.3.2.3</span> SS: ParsePattern ( <var>patternText</var>, <var>u</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-regexpcreate" title="RegExpCreate ( P, F )"><span class="secnum">21.2.3.2.4</span> RegExpCreate ( <var>P</var>, <var>F</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-escaperegexppattern" title="EscapeRegExpPattern ( P, F )"><span class="secnum">21.2.3.2.5</span> EscapeRegExpPattern ( <var>P</var>, <var>F</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-regexp-constructor" title="Properties of the RegExp Constructor"><span class="secnum">21.2.4</span> Properties of the RegExp Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-regexp.prototype" title="RegExp.prototype"><span class="secnum">21.2.4.1</span> RegExp.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-regexp-@@species" title="get RegExp [ @@species ]"><span class="secnum">21.2.4.2</span> get RegExp [ @@species ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-regexp-prototype-object" title="Properties of the RegExp Prototype Object"><span class="secnum">21.2.5</span> Properties of the RegExp Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-regexp.prototype.constructor" title="RegExp.prototype.constructor"><span class="secnum">21.2.5.1</span> RegExp.prototype.constructor</a></li><li><span class="item-toggle">◢</span><a href="#sec-regexp.prototype.exec" title="RegExp.prototype.exec ( string )"><span class="secnum">21.2.5.2</span> RegExp.prototype.exec ( <var>string</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-regexpexec" title="RegExpExec ( R, S )"><span class="secnum">21.2.5.2.1</span> RegExpExec ( <var>R</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-regexpbuiltinexec" title="RegExpBuiltinExec ( R, S )"><span class="secnum">21.2.5.2.2</span> RegExpBuiltinExec ( <var>R</var>, <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-advancestringindex" title="AdvanceStringIndex ( S, index, unicode )"><span class="secnum">21.2.5.2.3</span> AdvanceStringIndex ( <var>S</var>, <var>index</var>, <var>unicode</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-get-regexp.prototype.dotAll" title="get RegExp.prototype.dotAll"><span class="secnum">21.2.5.3</span> get RegExp.prototype.dotAll</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-regexp.prototype.flags" title="get RegExp.prototype.flags"><span class="secnum">21.2.5.4</span> get RegExp.prototype.flags</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-regexp.prototype.global" title="get RegExp.prototype.global"><span class="secnum">21.2.5.5</span> get RegExp.prototype.global</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-regexp.prototype.ignorecase" title="get RegExp.prototype.ignoreCase"><span class="secnum">21.2.5.6</span> get RegExp.prototype.ignoreCase</a></li><li><span class="item-toggle-none"></span><a href="#sec-regexp.prototype-@@match" title="RegExp.prototype [ @@match ] ( string )"><span class="secnum">21.2.5.7</span> RegExp.prototype [ @@match ] ( <var>string</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-regexp-prototype-matchall" title="RegExp.prototype [ @@matchAll ] ( string )"><span class="secnum">21.2.5.8</span> RegExp.prototype [ @@matchAll ] ( <var>string</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-regexp.prototype.multiline" title="get RegExp.prototype.multiline"><span class="secnum">21.2.5.9</span> get RegExp.prototype.multiline</a></li><li><span class="item-toggle-none"></span><a href="#sec-regexp.prototype-@@replace" title="RegExp.prototype [ @@replace ] ( string, replaceValue )"><span class="secnum">21.2.5.10</span> RegExp.prototype [ @@replace ] ( <var>string</var>, <var>replaceValue</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-regexp.prototype-@@search" title="RegExp.prototype [ @@search ] ( string )"><span class="secnum">21.2.5.11</span> RegExp.prototype [ @@search ] ( <var>string</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-regexp.prototype.source" title="get RegExp.prototype.source"><span class="secnum">21.2.5.12</span> get RegExp.prototype.source</a></li><li><span class="item-toggle-none"></span><a href="#sec-regexp.prototype-@@split" title="RegExp.prototype [ @@split ] ( string, limit )"><span class="secnum">21.2.5.13</span> RegExp.prototype [ @@split ] ( <var>string</var>, <var>limit</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-regexp.prototype.sticky" title="get RegExp.prototype.sticky"><span class="secnum">21.2.5.14</span> get RegExp.prototype.sticky</a></li><li><span class="item-toggle-none"></span><a href="#sec-regexp.prototype.test" title="RegExp.prototype.test ( S )"><span class="secnum">21.2.5.15</span> RegExp.prototype.test ( <var>S</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-regexp.prototype.tostring" title="RegExp.prototype.toString ( )"><span class="secnum">21.2.5.16</span> RegExp.prototype.toString ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-regexp.prototype.unicode" title="get RegExp.prototype.unicode"><span class="secnum">21.2.5.17</span> get RegExp.prototype.unicode</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-regexp-instances" title="Properties of RegExp Instances"><span class="secnum">21.2.6</span> Properties of RegExp Instances</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-lastindex" title="lastIndex"><span class="secnum">21.2.6.1</span> lastIndex</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-regexp-string-iterator-objects" title="RegExp String Iterator Objects"><span class="secnum">21.2.7</span> RegExp String Iterator Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createregexpstringiterator" title="CreateRegExpStringIterator ( R, S, global, fullUnicode )"><span class="secnum">21.2.7.1</span> CreateRegExpStringIterator ( <var>R</var>, <var>S</var>, <var>global</var>, <var>fullUnicode</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-%regexpstringiteratorprototype%-object" title="The %RegExpStringIteratorPrototype% Object"><span class="secnum">21.2.7.2</span> The %RegExpStringIteratorPrototype% Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%regexpstringiteratorprototype%.next" title="%RegExpStringIteratorPrototype%.next ( )"><span class="secnum">21.2.7.2.1</span> %RegExpStringIteratorPrototype%.next ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%regexpstringiteratorprototype%-@@tostringtag" title="%RegExpStringIteratorPrototype% [ @@toStringTag ]"><span class="secnum">21.2.7.2.2</span> %RegExpStringIteratorPrototype% [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-regexp-string-iterator-instances" title="Properties of RegExp String Iterator Instances"><span class="secnum">21.2.7.3</span> Properties of RegExp String Iterator Instances</a></li></ol></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-indexed-collections" title="Indexed Collections"><span class="secnum">22</span> Indexed Collections</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-array-objects" title="Array Objects"><span class="secnum">22.1</span> Array Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-array-constructor" title="The Array Constructor"><span class="secnum">22.1.1</span> The Array Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-array-constructor-array" title="Array ( )"><span class="secnum">22.1.1.1</span> Array ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array-len" title="Array ( len )"><span class="secnum">22.1.1.2</span> Array ( <var>len</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array-items" title="Array ( ...items )"><span class="secnum">22.1.1.3</span> Array ( ...<var>items</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-array-constructor" title="Properties of the Array Constructor"><span class="secnum">22.1.2</span> Properties of the Array Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-array.from" title="Array.from ( items [ , mapfn [ , thisArg ] ] )"><span class="secnum">22.1.2.1</span> Array.from ( <var>items</var> [ , <var>mapfn</var> [ , <var>thisArg</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.isarray" title="Array.isArray ( arg )"><span class="secnum">22.1.2.2</span> Array.isArray ( <var>arg</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.of" title="Array.of ( ...items )"><span class="secnum">22.1.2.3</span> Array.of ( ...<var>items</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype" title="Array.prototype"><span class="secnum">22.1.2.4</span> Array.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-array-@@species" title="get Array [ @@species ]"><span class="secnum">22.1.2.5</span> get Array [ @@species ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-array-prototype-object" title="Properties of the Array Prototype Object"><span class="secnum">22.1.3</span> Properties of the Array Prototype Object</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-array.prototype.concat" title="Array.prototype.concat ( ...items )"><span class="secnum">22.1.3.1</span> Array.prototype.concat ( ...<var>items</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-isconcatspreadable" title="IsConcatSpreadable ( O )"><span class="secnum">22.1.3.1.1</span> IsConcatSpreadable ( <var>O</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.constructor" title="Array.prototype.constructor"><span class="secnum">22.1.3.2</span> Array.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.copywithin" title="Array.prototype.copyWithin ( target, start [ , end ] )"><span class="secnum">22.1.3.3</span> Array.prototype.copyWithin ( <var>target</var>, <var>start</var> [ , <var>end</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.entries" title="Array.prototype.entries ( )"><span class="secnum">22.1.3.4</span> Array.prototype.entries ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.every" title="Array.prototype.every ( callbackfn [ , thisArg ] )"><span class="secnum">22.1.3.5</span> Array.prototype.every ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.fill" title="Array.prototype.fill ( value [ , start [ , end ] ] )"><span class="secnum">22.1.3.6</span> Array.prototype.fill ( <var>value</var> [ , <var>start</var> [ , <var>end</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.filter" title="Array.prototype.filter ( callbackfn [ , thisArg ] )"><span class="secnum">22.1.3.7</span> Array.prototype.filter ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.find" title="Array.prototype.find ( predicate [ , thisArg ] )"><span class="secnum">22.1.3.8</span> Array.prototype.find ( <var>predicate</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.findindex" title="Array.prototype.findIndex ( predicate [ , thisArg ] )"><span class="secnum">22.1.3.9</span> Array.prototype.findIndex ( <var>predicate</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle">◢</span><a href="#sec-array.prototype.flat" title="Array.prototype.flat ( [ depth ] )"><span class="secnum">22.1.3.10</span> Array.prototype.flat ( [ <var>depth</var> ] )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-flattenintoarray" title="FlattenIntoArray ( target, source, sourceLen, start, depth [ , mapperFunction, thisArg ] )"><span class="secnum">22.1.3.10.1</span> FlattenIntoArray ( <var>target</var>, <var>source</var>, <var>sourceLen</var>, <var>start</var>, <var>depth</var> [ , <var>mapperFunction</var>, <var>thisArg</var> ] )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.flatmap" title="Array.prototype.flatMap ( mapperFunction [ , thisArg ] )"><span class="secnum">22.1.3.11</span> Array.prototype.flatMap ( <var>mapperFunction</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.foreach" title="Array.prototype.forEach ( callbackfn [ , thisArg ] )"><span class="secnum">22.1.3.12</span> Array.prototype.forEach ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.includes" title="Array.prototype.includes ( searchElement [ , fromIndex ] )"><span class="secnum">22.1.3.13</span> Array.prototype.includes ( <var>searchElement</var> [ , <var>fromIndex</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.indexof" title="Array.prototype.indexOf ( searchElement [ , fromIndex ] )"><span class="secnum">22.1.3.14</span> Array.prototype.indexOf ( <var>searchElement</var> [ , <var>fromIndex</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.join" title="Array.prototype.join ( separator )"><span class="secnum">22.1.3.15</span> Array.prototype.join ( <var>separator</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.keys" title="Array.prototype.keys ( )"><span class="secnum">22.1.3.16</span> Array.prototype.keys ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.lastindexof" title="Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )"><span class="secnum">22.1.3.17</span> Array.prototype.lastIndexOf ( <var>searchElement</var> [ , <var>fromIndex</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.map" title="Array.prototype.map ( callbackfn [ , thisArg ] )"><span class="secnum">22.1.3.18</span> Array.prototype.map ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.pop" title="Array.prototype.pop ( )"><span class="secnum">22.1.3.19</span> Array.prototype.pop ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.push" title="Array.prototype.push ( ...items )"><span class="secnum">22.1.3.20</span> Array.prototype.push ( ...<var>items</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.reduce" title="Array.prototype.reduce ( callbackfn [ , initialValue ] )"><span class="secnum">22.1.3.21</span> Array.prototype.reduce ( <var>callbackfn</var> [ , <var>initialValue</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.reduceright" title="Array.prototype.reduceRight ( callbackfn [ , initialValue ] )"><span class="secnum">22.1.3.22</span> Array.prototype.reduceRight ( <var>callbackfn</var> [ , <var>initialValue</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.reverse" title="Array.prototype.reverse ( )"><span class="secnum">22.1.3.23</span> Array.prototype.reverse ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.shift" title="Array.prototype.shift ( )"><span class="secnum">22.1.3.24</span> Array.prototype.shift ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.slice" title="Array.prototype.slice ( start, end )"><span class="secnum">22.1.3.25</span> Array.prototype.slice ( <var>start</var>, <var>end</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.some" title="Array.prototype.some ( callbackfn [ , thisArg ] )"><span class="secnum">22.1.3.26</span> Array.prototype.some ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle">◢</span><a href="#sec-array.prototype.sort" title="Array.prototype.sort ( comparefn )"><span class="secnum">22.1.3.27</span> Array.prototype.sort ( <var>comparefn</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-sortcompare" title="SortCompare ( x, y )"><span class="secnum">22.1.3.27.1</span> SortCompare ( <var>x</var>, <var>y</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.splice" title="Array.prototype.splice ( start, deleteCount, ...items )"><span class="secnum">22.1.3.28</span> Array.prototype.splice ( <var>start</var>, <var>deleteCount</var>, ...<var>items</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.tolocalestring" title="Array.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )"><span class="secnum">22.1.3.29</span> Array.prototype.toLocaleString ( [ <var>reserved1</var> [ , <var>reserved2</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.tostring" title="Array.prototype.toString ( )"><span class="secnum">22.1.3.30</span> Array.prototype.toString ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.unshift" title="Array.prototype.unshift ( ...items )"><span class="secnum">22.1.3.31</span> Array.prototype.unshift ( ...<var>items</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype.values" title="Array.prototype.values ( )"><span class="secnum">22.1.3.32</span> Array.prototype.values ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype-@@iterator" title="Array.prototype [ @@iterator ] ( )"><span class="secnum">22.1.3.33</span> Array.prototype [ @@iterator ] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-array.prototype-@@unscopables" title="Array.prototype [ @@unscopables ]"><span class="secnum">22.1.3.34</span> Array.prototype [ @@unscopables ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-array-instances" title="Properties of Array Instances"><span class="secnum">22.1.4</span> Properties of Array Instances</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-properties-of-array-instances-length" title="length"><span class="secnum">22.1.4.1</span> length</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-array-iterator-objects" title="Array Iterator Objects"><span class="secnum">22.1.5</span> Array Iterator Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createarrayiterator" title="CreateArrayIterator ( array, kind )"><span class="secnum">22.1.5.1</span> CreateArrayIterator ( <var>array</var>, <var>kind</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-%arrayiteratorprototype%-object" title="The %ArrayIteratorPrototype% Object"><span class="secnum">22.1.5.2</span> The %ArrayIteratorPrototype% Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%arrayiteratorprototype%.next" title="%ArrayIteratorPrototype%.next ( )"><span class="secnum">22.1.5.2.1</span> %ArrayIteratorPrototype%.next ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%arrayiteratorprototype%-@@tostringtag" title="%ArrayIteratorPrototype% [ @@toStringTag ]"><span class="secnum">22.1.5.2.2</span> %ArrayIteratorPrototype% [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-array-iterator-instances" title="Properties of Array Iterator Instances"><span class="secnum">22.1.5.3</span> Properties of Array Iterator Instances</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-typedarray-objects" title="TypedArray Objects"><span class="secnum">22.2</span> TypedArray Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-%typedarray%-intrinsic-object" title="The %TypedArray% Intrinsic Object"><span class="secnum">22.2.1</span> The %TypedArray% Intrinsic Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%" title="%TypedArray% ( )"><span class="secnum">22.2.1.1</span> %TypedArray% ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-%typedarray%-intrinsic-object" title="Properties of the %TypedArray% Intrinsic Object"><span class="secnum">22.2.2</span> Properties of the %TypedArray% Intrinsic Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.from" title="%TypedArray%.from ( source [ , mapfn [ , thisArg ] ] )"><span class="secnum">22.2.2.1</span> %TypedArray%.from ( <var>source</var> [ , <var>mapfn</var> [ , <var>thisArg</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.of" title="%TypedArray%.of ( ...items )"><span class="secnum">22.2.2.2</span> %TypedArray%.of ( ...<var>items</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype" title="%TypedArray%.prototype"><span class="secnum">22.2.2.3</span> %TypedArray%.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-%typedarray%-@@species" title="get %TypedArray% [ @@species ]"><span class="secnum">22.2.2.4</span> get %TypedArray% [ @@species ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-%typedarrayprototype%-object" title="Properties of the %TypedArray% Prototype Object"><span class="secnum">22.2.3</span> Properties of the %TypedArray% Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-get-%typedarray%.prototype.buffer" title="get %TypedArray%.prototype.buffer"><span class="secnum">22.2.3.1</span> get %TypedArray%.prototype.buffer</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-%typedarray%.prototype.bytelength" title="get %TypedArray%.prototype.byteLength"><span class="secnum">22.2.3.2</span> get %TypedArray%.prototype.byteLength</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-%typedarray%.prototype.byteoffset" title="get %TypedArray%.prototype.byteOffset"><span class="secnum">22.2.3.3</span> get %TypedArray%.prototype.byteOffset</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.constructor" title="%TypedArray%.prototype.constructor"><span class="secnum">22.2.3.4</span> %TypedArray%.prototype.constructor</a></li><li><span class="item-toggle">◢</span><a href="#sec-%typedarray%.prototype.copywithin" title="%TypedArray%.prototype.copyWithin ( target, start [ , end ] )"><span class="secnum">22.2.3.5</span> %TypedArray%.prototype.copyWithin ( <var>target</var>, <var>start</var> [ , <var>end</var> ] )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-validatetypedarray" title="ValidateTypedArray ( O )"><span class="secnum">22.2.3.5.1</span> ValidateTypedArray ( <var>O</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.entries" title="%TypedArray%.prototype.entries ( )"><span class="secnum">22.2.3.6</span> %TypedArray%.prototype.entries ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.every" title="%TypedArray%.prototype.every ( callbackfn [ , thisArg ] )"><span class="secnum">22.2.3.7</span> %TypedArray%.prototype.every ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.fill" title="%TypedArray%.prototype.fill ( value [ , start [ , end ] ] )"><span class="secnum">22.2.3.8</span> %TypedArray%.prototype.fill ( <var>value</var> [ , <var>start</var> [ , <var>end</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.filter" title="%TypedArray%.prototype.filter ( callbackfn [ , thisArg ] )"><span class="secnum">22.2.3.9</span> %TypedArray%.prototype.filter ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.find" title="%TypedArray%.prototype.find ( predicate [ , thisArg ] )"><span class="secnum">22.2.3.10</span> %TypedArray%.prototype.find ( <var>predicate</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.findindex" title="%TypedArray%.prototype.findIndex ( predicate [ , thisArg ] )"><span class="secnum">22.2.3.11</span> %TypedArray%.prototype.findIndex ( <var>predicate</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.foreach" title="%TypedArray%.prototype.forEach ( callbackfn [ , thisArg ] )"><span class="secnum">22.2.3.12</span> %TypedArray%.prototype.forEach ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.includes" title="%TypedArray%.prototype.includes ( searchElement [ , fromIndex ] )"><span class="secnum">22.2.3.13</span> %TypedArray%.prototype.includes ( <var>searchElement</var> [ , <var>fromIndex</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.indexof" title="%TypedArray%.prototype.indexOf ( searchElement [ , fromIndex ] )"><span class="secnum">22.2.3.14</span> %TypedArray%.prototype.indexOf ( <var>searchElement</var> [ , <var>fromIndex</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.join" title="%TypedArray%.prototype.join ( separator )"><span class="secnum">22.2.3.15</span> %TypedArray%.prototype.join ( <var>separator</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.keys" title="%TypedArray%.prototype.keys ( )"><span class="secnum">22.2.3.16</span> %TypedArray%.prototype.keys ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.lastindexof" title="%TypedArray%.prototype.lastIndexOf ( searchElement [ , fromIndex ] )"><span class="secnum">22.2.3.17</span> %TypedArray%.prototype.lastIndexOf ( <var>searchElement</var> [ , <var>fromIndex</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-%typedarray%.prototype.length" title="get %TypedArray%.prototype.length"><span class="secnum">22.2.3.18</span> get %TypedArray%.prototype.length</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.map" title="%TypedArray%.prototype.map ( callbackfn [ , thisArg ] )"><span class="secnum">22.2.3.19</span> %TypedArray%.prototype.map ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.reduce" title="%TypedArray%.prototype.reduce ( callbackfn [ , initialValue ] )"><span class="secnum">22.2.3.20</span> %TypedArray%.prototype.reduce ( <var>callbackfn</var> [ , <var>initialValue</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.reduceright" title="%TypedArray%.prototype.reduceRight ( callbackfn [ , initialValue ] )"><span class="secnum">22.2.3.21</span> %TypedArray%.prototype.reduceRight ( <var>callbackfn</var> [ , <var>initialValue</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.reverse" title="%TypedArray%.prototype.reverse ( )"><span class="secnum">22.2.3.22</span> %TypedArray%.prototype.reverse ( )</a></li><li><span class="item-toggle">◢</span><a href="#sec-%typedarray%.prototype.set-overloaded-offset" title="%TypedArray%.prototype.set ( overloaded [ , offset ] )"><span class="secnum">22.2.3.23</span> %TypedArray%.prototype.set ( <var>overloaded</var> [ , <var>offset</var> ] )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.set-array-offset" title="%TypedArray%.prototype.set ( array [ , offset ] )"><span class="secnum">22.2.3.23.1</span> %TypedArray%.prototype.set ( <var>array</var> [ , <var>offset</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.set-typedarray-offset" title="%TypedArray%.prototype.set ( typedArray [ , offset ] )"><span class="secnum">22.2.3.23.2</span> %TypedArray%.prototype.set ( <var>typedArray</var> [ , <var>offset</var> ] )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.slice" title="%TypedArray%.prototype.slice ( start, end )"><span class="secnum">22.2.3.24</span> %TypedArray%.prototype.slice ( <var>start</var>, <var>end</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.some" title="%TypedArray%.prototype.some ( callbackfn [ , thisArg ] )"><span class="secnum">22.2.3.25</span> %TypedArray%.prototype.some ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.sort" title="%TypedArray%.prototype.sort ( comparefn )"><span class="secnum">22.2.3.26</span> %TypedArray%.prototype.sort ( <var>comparefn</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.subarray" title="%TypedArray%.prototype.subarray ( begin, end )"><span class="secnum">22.2.3.27</span> %TypedArray%.prototype.subarray ( <var>begin</var>, <var>end</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.tolocalestring" title="%TypedArray%.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )"><span class="secnum">22.2.3.28</span> %TypedArray%.prototype.toLocaleString ( [ <var>reserved1</var> [ , <var>reserved2</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.tostring" title="%TypedArray%.prototype.toString ( )"><span class="secnum">22.2.3.29</span> %TypedArray%.prototype.toString ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype.values" title="%TypedArray%.prototype.values ( )"><span class="secnum">22.2.3.30</span> %TypedArray%.prototype.values ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%typedarray%.prototype-@@iterator" title="%TypedArray%.prototype [ @@iterator ] ( )"><span class="secnum">22.2.3.31</span> %TypedArray%.prototype [ @@iterator ] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-%typedarray%.prototype-@@tostringtag" title="get %TypedArray%.prototype [ @@toStringTag ]"><span class="secnum">22.2.3.32</span> get %TypedArray%.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-typedarray-constructors" title="The TypedArray Constructors"><span class="secnum">22.2.4</span> The <var>TypedArray</var> Constructors</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-typedarray" title="TypedArray ( )"><span class="secnum">22.2.4.1</span> <var>TypedArray</var> ( )</a></li><li><span class="item-toggle">◢</span><a href="#sec-typedarray-length" title="TypedArray ( length )"><span class="secnum">22.2.4.2</span> <var>TypedArray</var> ( <var>length</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-allocatetypedarray" title="AllocateTypedArray ( constructorName, newTarget, defaultProto [ , length ] )"><span class="secnum">22.2.4.2.1</span> AllocateTypedArray ( <var>constructorName</var>, <var>newTarget</var>, <var>defaultProto</var> [ , <var>length</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-allocatetypedarraybuffer" title="AllocateTypedArrayBuffer ( O, length )"><span class="secnum">22.2.4.2.2</span> AllocateTypedArrayBuffer ( <var>O</var>, <var>length</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-typedarray-typedarray" title="TypedArray ( typedArray )"><span class="secnum">22.2.4.3</span> <var>TypedArray</var> ( <var>typedArray</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-typedarray-object" title="TypedArray ( object )"><span class="secnum">22.2.4.4</span> <var>TypedArray</var> ( <var>object</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-typedarray-buffer-byteoffset-length" title="TypedArray ( buffer [ , byteOffset [ , length ] ] )"><span class="secnum">22.2.4.5</span> <var>TypedArray</var> ( <var>buffer</var> [ , <var>byteOffset</var> [ , <var>length</var> ] ] )</a></li><li><span class="item-toggle-none"></span><a href="#typedarray-create" title="TypedArrayCreate ( constructor, argumentList )"><span class="secnum">22.2.4.6</span> TypedArrayCreate ( <var>constructor</var>, <var>argumentList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#typedarray-species-create" title="TypedArraySpeciesCreate ( exemplar, argumentList )"><span class="secnum">22.2.4.7</span> TypedArraySpeciesCreate ( <var>exemplar</var>, <var>argumentList</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-typedarray-constructors" title="Properties of the TypedArray Constructors"><span class="secnum">22.2.5</span> Properties of the <var>TypedArray</var> Constructors</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-typedarray.bytes_per_element" title="TypedArray.BYTES_PER_ELEMENT"><span class="secnum">22.2.5.1</span> <var>TypedArray</var>.BYTES_PER_ELEMENT</a></li><li><span class="item-toggle-none"></span><a href="#sec-typedarray.prototype" title="TypedArray.prototype"><span class="secnum">22.2.5.2</span> <var>TypedArray</var>.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-typedarray-prototype-objects" title="Properties of the TypedArray Prototype Objects"><span class="secnum">22.2.6</span> Properties of the <var>TypedArray</var> Prototype Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-typedarray.prototype.bytes_per_element" title="TypedArray.prototype.BYTES_PER_ELEMENT"><span class="secnum">22.2.6.1</span> <var>TypedArray</var>.prototype.BYTES_PER_ELEMENT</a></li><li><span class="item-toggle-none"></span><a href="#sec-typedarray.prototype.constructor" title="TypedArray.prototype.constructor"><span class="secnum">22.2.6.2</span> <var>TypedArray</var>.prototype.constructor</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-typedarray-instances" title="Properties of TypedArray Instances"><span class="secnum">22.2.7</span> Properties of <var>TypedArray</var> Instances</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-keyed-collections" title="Keyed Collections"><span class="secnum">23</span> Keyed Collections</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-map-objects" title="Map Objects"><span class="secnum">23.1</span> Map Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-map-constructor" title="The Map Constructor"><span class="secnum">23.1.1</span> The Map Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-map-iterable" title="Map ( [ iterable ] )"><span class="secnum">23.1.1.1</span> Map ( [ <var>iterable</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-add-entries-from-iterable" title="AddEntriesFromIterable ( target, iterable, adder )"><span class="secnum">23.1.1.2</span> AddEntriesFromIterable ( <var>target</var>, <var>iterable</var>, <var>adder</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-map-constructor" title="Properties of the Map Constructor"><span class="secnum">23.1.2</span> Properties of the Map Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-map.prototype" title="Map.prototype"><span class="secnum">23.1.2.1</span> Map.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-map-@@species" title="get Map [ @@species ]"><span class="secnum">23.1.2.2</span> get Map [ @@species ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-map-prototype-object" title="Properties of the Map Prototype Object"><span class="secnum">23.1.3</span> Properties of the Map Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-map.prototype.clear" title="Map.prototype.clear ( )"><span class="secnum">23.1.3.1</span> Map.prototype.clear ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-map.prototype.constructor" title="Map.prototype.constructor"><span class="secnum">23.1.3.2</span> Map.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-map.prototype.delete" title="Map.prototype.delete ( key )"><span class="secnum">23.1.3.3</span> Map.prototype.delete ( <var>key</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-map.prototype.entries" title="Map.prototype.entries ( )"><span class="secnum">23.1.3.4</span> Map.prototype.entries ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-map.prototype.foreach" title="Map.prototype.forEach ( callbackfn [ , thisArg ] )"><span class="secnum">23.1.3.5</span> Map.prototype.forEach ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-map.prototype.get" title="Map.prototype.get ( key )"><span class="secnum">23.1.3.6</span> Map.prototype.get ( <var>key</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-map.prototype.has" title="Map.prototype.has ( key )"><span class="secnum">23.1.3.7</span> Map.prototype.has ( <var>key</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-map.prototype.keys" title="Map.prototype.keys ( )"><span class="secnum">23.1.3.8</span> Map.prototype.keys ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-map.prototype.set" title="Map.prototype.set ( key, value )"><span class="secnum">23.1.3.9</span> Map.prototype.set ( <var>key</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-map.prototype.size" title="get Map.prototype.size"><span class="secnum">23.1.3.10</span> get Map.prototype.size</a></li><li><span class="item-toggle-none"></span><a href="#sec-map.prototype.values" title="Map.prototype.values ( )"><span class="secnum">23.1.3.11</span> Map.prototype.values ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-map.prototype-@@iterator" title="Map.prototype [ @@iterator ] ( )"><span class="secnum">23.1.3.12</span> Map.prototype [ @@iterator ] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-map.prototype-@@tostringtag" title="Map.prototype [ @@toStringTag ]"><span class="secnum">23.1.3.13</span> Map.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-map-instances" title="Properties of Map Instances"><span class="secnum">23.1.4</span> Properties of Map Instances</a></li><li><span class="item-toggle">◢</span><a href="#sec-map-iterator-objects" title="Map Iterator Objects"><span class="secnum">23.1.5</span> Map Iterator Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createmapiterator" title="CreateMapIterator ( map, kind )"><span class="secnum">23.1.5.1</span> CreateMapIterator ( <var>map</var>, <var>kind</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-%mapiteratorprototype%-object" title="The %MapIteratorPrototype% Object"><span class="secnum">23.1.5.2</span> The %MapIteratorPrototype% Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%mapiteratorprototype%.next" title="%MapIteratorPrototype%.next ( )"><span class="secnum">23.1.5.2.1</span> %MapIteratorPrototype%.next ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%mapiteratorprototype%-@@tostringtag" title="%MapIteratorPrototype% [ @@toStringTag ]"><span class="secnum">23.1.5.2.2</span> %MapIteratorPrototype% [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-map-iterator-instances" title="Properties of Map Iterator Instances"><span class="secnum">23.1.5.3</span> Properties of Map Iterator Instances</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-set-objects" title="Set Objects"><span class="secnum">23.2</span> Set Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-set-constructor" title="The Set Constructor"><span class="secnum">23.2.1</span> The Set Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-set-iterable" title="Set ( [ iterable ] )"><span class="secnum">23.2.1.1</span> Set ( [ <var>iterable</var> ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-set-constructor" title="Properties of the Set Constructor"><span class="secnum">23.2.2</span> Properties of the Set Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-set.prototype" title="Set.prototype"><span class="secnum">23.2.2.1</span> Set.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-set-@@species" title="get Set [ @@species ]"><span class="secnum">23.2.2.2</span> get Set [ @@species ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-set-prototype-object" title="Properties of the Set Prototype Object"><span class="secnum">23.2.3</span> Properties of the Set Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-set.prototype.add" title="Set.prototype.add ( value )"><span class="secnum">23.2.3.1</span> Set.prototype.add ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-set.prototype.clear" title="Set.prototype.clear ( )"><span class="secnum">23.2.3.2</span> Set.prototype.clear ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-set.prototype.constructor" title="Set.prototype.constructor"><span class="secnum">23.2.3.3</span> Set.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-set.prototype.delete" title="Set.prototype.delete ( value )"><span class="secnum">23.2.3.4</span> Set.prototype.delete ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-set.prototype.entries" title="Set.prototype.entries ( )"><span class="secnum">23.2.3.5</span> Set.prototype.entries ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-set.prototype.foreach" title="Set.prototype.forEach ( callbackfn [ , thisArg ] )"><span class="secnum">23.2.3.6</span> Set.prototype.forEach ( <var>callbackfn</var> [ , <var>thisArg</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-set.prototype.has" title="Set.prototype.has ( value )"><span class="secnum">23.2.3.7</span> Set.prototype.has ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-set.prototype.keys" title="Set.prototype.keys ( )"><span class="secnum">23.2.3.8</span> Set.prototype.keys ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-set.prototype.size" title="get Set.prototype.size"><span class="secnum">23.2.3.9</span> get Set.prototype.size</a></li><li><span class="item-toggle-none"></span><a href="#sec-set.prototype.values" title="Set.prototype.values ( )"><span class="secnum">23.2.3.10</span> Set.prototype.values ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-set.prototype-@@iterator" title="Set.prototype [ @@iterator ] ( )"><span class="secnum">23.2.3.11</span> Set.prototype [ @@iterator ] ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-set.prototype-@@tostringtag" title="Set.prototype [ @@toStringTag ]"><span class="secnum">23.2.3.12</span> Set.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-set-instances" title="Properties of Set Instances"><span class="secnum">23.2.4</span> Properties of Set Instances</a></li><li><span class="item-toggle">◢</span><a href="#sec-set-iterator-objects" title="Set Iterator Objects"><span class="secnum">23.2.5</span> Set Iterator Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createsetiterator" title="CreateSetIterator ( set, kind )"><span class="secnum">23.2.5.1</span> CreateSetIterator ( <var>set</var>, <var>kind</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-%setiteratorprototype%-object" title="The %SetIteratorPrototype% Object"><span class="secnum">23.2.5.2</span> The %SetIteratorPrototype% Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%setiteratorprototype%.next" title="%SetIteratorPrototype%.next ( )"><span class="secnum">23.2.5.2.1</span> %SetIteratorPrototype%.next ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%setiteratorprototype%-@@tostringtag" title="%SetIteratorPrototype% [ @@toStringTag ]"><span class="secnum">23.2.5.2.2</span> %SetIteratorPrototype% [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-set-iterator-instances" title="Properties of Set Iterator Instances"><span class="secnum">23.2.5.3</span> Properties of Set Iterator Instances</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-weakmap-objects" title="WeakMap Objects"><span class="secnum">23.3</span> WeakMap Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-weakmap-constructor" title="The WeakMap Constructor"><span class="secnum">23.3.1</span> The WeakMap Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-weakmap-iterable" title="WeakMap ( [ iterable ] )"><span class="secnum">23.3.1.1</span> WeakMap ( [ <var>iterable</var> ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-weakmap-constructor" title="Properties of the WeakMap Constructor"><span class="secnum">23.3.2</span> Properties of the WeakMap Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-weakmap.prototype" title="WeakMap.prototype"><span class="secnum">23.3.2.1</span> WeakMap.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-weakmap-prototype-object" title="Properties of the WeakMap Prototype Object"><span class="secnum">23.3.3</span> Properties of the WeakMap Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-weakmap.prototype.constructor" title="WeakMap.prototype.constructor"><span class="secnum">23.3.3.1</span> WeakMap.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-weakmap.prototype.delete" title="WeakMap.prototype.delete ( key )"><span class="secnum">23.3.3.2</span> WeakMap.prototype.delete ( <var>key</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-weakmap.prototype.get" title="WeakMap.prototype.get ( key )"><span class="secnum">23.3.3.3</span> WeakMap.prototype.get ( <var>key</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-weakmap.prototype.has" title="WeakMap.prototype.has ( key )"><span class="secnum">23.3.3.4</span> WeakMap.prototype.has ( <var>key</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-weakmap.prototype.set" title="WeakMap.prototype.set ( key, value )"><span class="secnum">23.3.3.5</span> WeakMap.prototype.set ( <var>key</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-weakmap.prototype-@@tostringtag" title="WeakMap.prototype [ @@toStringTag ]"><span class="secnum">23.3.3.6</span> WeakMap.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-weakmap-instances" title="Properties of WeakMap Instances"><span class="secnum">23.3.4</span> Properties of WeakMap Instances</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-weakset-objects" title="WeakSet Objects"><span class="secnum">23.4</span> WeakSet Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-weakset-constructor" title="The WeakSet Constructor"><span class="secnum">23.4.1</span> The WeakSet Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-weakset-iterable" title="WeakSet ( [ iterable ] )"><span class="secnum">23.4.1.1</span> WeakSet ( [ <var>iterable</var> ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-weakset-constructor" title="Properties of the WeakSet Constructor"><span class="secnum">23.4.2</span> Properties of the WeakSet Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-weakset.prototype" title="WeakSet.prototype"><span class="secnum">23.4.2.1</span> WeakSet.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-weakset-prototype-object" title="Properties of the WeakSet Prototype Object"><span class="secnum">23.4.3</span> Properties of the WeakSet Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-weakset.prototype.add" title="WeakSet.prototype.add ( value )"><span class="secnum">23.4.3.1</span> WeakSet.prototype.add ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-weakset.prototype.constructor" title="WeakSet.prototype.constructor"><span class="secnum">23.4.3.2</span> WeakSet.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-weakset.prototype.delete" title="WeakSet.prototype.delete ( value )"><span class="secnum">23.4.3.3</span> WeakSet.prototype.delete ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-weakset.prototype.has" title="WeakSet.prototype.has ( value )"><span class="secnum">23.4.3.4</span> WeakSet.prototype.has ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-weakset.prototype-@@tostringtag" title="WeakSet.prototype [ @@toStringTag ]"><span class="secnum">23.4.3.5</span> WeakSet.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-weakset-instances" title="Properties of WeakSet Instances"><span class="secnum">23.4.4</span> Properties of WeakSet Instances</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-structured-data" title="Structured Data"><span class="secnum">24</span> Structured Data</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-arraybuffer-objects" title="ArrayBuffer Objects"><span class="secnum">24.1</span> ArrayBuffer Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-arraybuffer-notation" title="Notation"><span class="secnum">24.1.1</span> Notation</a></li><li><span class="item-toggle">◢</span><a href="#sec-abstract-operations-for-arraybuffer-objects" title="Abstract Operations For ArrayBuffer Objects"><span class="secnum">24.1.2</span> Abstract Operations For ArrayBuffer Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-allocatearraybuffer" title="AllocateArrayBuffer ( constructor, byteLength )"><span class="secnum">24.1.2.1</span> AllocateArrayBuffer ( <var>constructor</var>, <var>byteLength</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isdetachedbuffer" title="IsDetachedBuffer ( arrayBuffer )"><span class="secnum">24.1.2.2</span> IsDetachedBuffer ( <var>arrayBuffer</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-detacharraybuffer" title="DetachArrayBuffer ( arrayBuffer [ , key ] )"><span class="secnum">24.1.2.3</span> DetachArrayBuffer ( <var>arrayBuffer</var> [ , <var>key</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-clonearraybuffer" title="CloneArrayBuffer ( srcBuffer, srcByteOffset, srcLength, cloneConstructor )"><span class="secnum">24.1.2.4</span> CloneArrayBuffer ( <var>srcBuffer</var>, <var>srcByteOffset</var>, <var>srcLength</var>, <var>cloneConstructor</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isunsignedelementtype" title="IsUnsignedElementType ( type )"><span class="secnum">24.1.2.5</span> IsUnsignedElementType ( <var>type</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isunclampedintegerelementtype" title="IsUnclampedIntegerElementType ( type )"><span class="secnum">24.1.2.6</span> IsUnclampedIntegerElementType ( <var>type</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isbigintelementtype" title="IsBigIntElementType ( type )"><span class="secnum">24.1.2.7</span> IsBigIntElementType ( <var>type</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isnotearconfiguration" title="IsNoTearConfiguration ( type, order )"><span class="secnum">24.1.2.8</span> IsNoTearConfiguration ( <var>type</var>, <var>order</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-rawbytestonumeric" title="RawBytesToNumeric ( type, rawBytes, isLittleEndian )"><span class="secnum">24.1.2.9</span> RawBytesToNumeric ( <var>type</var>, <var>rawBytes</var>, <var>isLittleEndian</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getvaluefrombuffer" title="GetValueFromBuffer ( arrayBuffer, byteIndex, type, isTypedArray, order [ , isLittleEndian ] )"><span class="secnum">24.1.2.10</span> GetValueFromBuffer ( <var>arrayBuffer</var>, <var>byteIndex</var>, <var>type</var>, <var>isTypedArray</var>, <var>order</var> [ , <var>isLittleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-numerictorawbytes" title="NumericToRawBytes ( type, value, isLittleEndian )"><span class="secnum">24.1.2.11</span> NumericToRawBytes ( <var>type</var>, <var>value</var>, <var>isLittleEndian</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-setvalueinbuffer" title="SetValueInBuffer ( arrayBuffer, byteIndex, type, value, isTypedArray, order [ , isLittleEndian ] )"><span class="secnum">24.1.2.12</span> SetValueInBuffer ( <var>arrayBuffer</var>, <var>byteIndex</var>, <var>type</var>, <var>value</var>, <var>isTypedArray</var>, <var>order</var> [ , <var>isLittleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getmodifysetvalueinbuffer" title="GetModifySetValueInBuffer ( arrayBuffer, byteIndex, type, value, op [ , isLittleEndian ] )"><span class="secnum">24.1.2.13</span> GetModifySetValueInBuffer ( <var>arrayBuffer</var>, <var>byteIndex</var>, <var>type</var>, <var>value</var>, <var>op</var> [ , <var>isLittleEndian</var> ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-arraybuffer-constructor" title="The ArrayBuffer Constructor"><span class="secnum">24.1.3</span> The ArrayBuffer Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-arraybuffer-length" title="ArrayBuffer ( length )"><span class="secnum">24.1.3.1</span> ArrayBuffer ( <var>length</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-arraybuffer-constructor" title="Properties of the ArrayBuffer Constructor"><span class="secnum">24.1.4</span> Properties of the ArrayBuffer Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-arraybuffer.isview" title="ArrayBuffer.isView ( arg )"><span class="secnum">24.1.4.1</span> ArrayBuffer.isView ( <var>arg</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-arraybuffer.prototype" title="ArrayBuffer.prototype"><span class="secnum">24.1.4.2</span> ArrayBuffer.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-arraybuffer-@@species" title="get ArrayBuffer [ @@species ]"><span class="secnum">24.1.4.3</span> get ArrayBuffer [ @@species ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-arraybuffer-prototype-object" title="Properties of the ArrayBuffer Prototype Object"><span class="secnum">24.1.5</span> Properties of the ArrayBuffer Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-get-arraybuffer.prototype.bytelength" title="get ArrayBuffer.prototype.byteLength"><span class="secnum">24.1.5.1</span> get ArrayBuffer.prototype.byteLength</a></li><li><span class="item-toggle-none"></span><a href="#sec-arraybuffer.prototype.constructor" title="ArrayBuffer.prototype.constructor"><span class="secnum">24.1.5.2</span> ArrayBuffer.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-arraybuffer.prototype.slice" title="ArrayBuffer.prototype.slice ( start, end )"><span class="secnum">24.1.5.3</span> ArrayBuffer.prototype.slice ( <var>start</var>, <var>end</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-arraybuffer.prototype-@@tostringtag" title="ArrayBuffer.prototype [ @@toStringTag ]"><span class="secnum">24.1.5.4</span> ArrayBuffer.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-the-arraybuffer-instances" title="Properties of ArrayBuffer Instances"><span class="secnum">24.1.6</span> Properties of ArrayBuffer Instances</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-sharedarraybuffer-objects" title="SharedArrayBuffer Objects"><span class="secnum">24.2</span> SharedArrayBuffer Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-abstract-operations-for-sharedarraybuffer-objects" title="Abstract Operations for SharedArrayBuffer Objects"><span class="secnum">24.2.1</span> Abstract Operations for SharedArrayBuffer Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-allocatesharedarraybuffer" title="AllocateSharedArrayBuffer ( constructor, byteLength )"><span class="secnum">24.2.1.1</span> AllocateSharedArrayBuffer ( <var>constructor</var>, <var>byteLength</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-issharedarraybuffer" title="IsSharedArrayBuffer ( obj )"><span class="secnum">24.2.1.2</span> IsSharedArrayBuffer ( <var>obj</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-sharedarraybuffer-constructor" title="The SharedArrayBuffer Constructor"><span class="secnum">24.2.2</span> The SharedArrayBuffer Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-sharedarraybuffer-length" title="SharedArrayBuffer ( [ length ] )"><span class="secnum">24.2.2.1</span> SharedArrayBuffer ( [ <var>length</var> ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-sharedarraybuffer-constructor" title="Properties of the SharedArrayBuffer Constructor"><span class="secnum">24.2.3</span> Properties of the SharedArrayBuffer Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-sharedarraybuffer.prototype" title="SharedArrayBuffer.prototype"><span class="secnum">24.2.3.1</span> SharedArrayBuffer.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-sharedarraybuffer-@@species" title="get SharedArrayBuffer [ @@species ]"><span class="secnum">24.2.3.2</span> get SharedArrayBuffer [ @@species ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-sharedarraybuffer-prototype-object" title="Properties of the SharedArrayBuffer Prototype Object"><span class="secnum">24.2.4</span> Properties of the SharedArrayBuffer Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-get-sharedarraybuffer.prototype.bytelength" title="get SharedArrayBuffer.prototype.byteLength"><span class="secnum">24.2.4.1</span> get SharedArrayBuffer.prototype.byteLength</a></li><li><span class="item-toggle-none"></span><a href="#sec-sharedarraybuffer.prototype.constructor" title="SharedArrayBuffer.prototype.constructor"><span class="secnum">24.2.4.2</span> SharedArrayBuffer.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-sharedarraybuffer.prototype.slice" title="SharedArrayBuffer.prototype.slice ( start, end )"><span class="secnum">24.2.4.3</span> SharedArrayBuffer.prototype.slice ( <var>start</var>, <var>end</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-sharedarraybuffer.prototype.toString" title="SharedArrayBuffer.prototype [ @@toStringTag ]"><span class="secnum">24.2.4.4</span> SharedArrayBuffer.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-the-sharedarraybuffer-instances" title="Properties of SharedArrayBuffer Instances"><span class="secnum">24.2.5</span> Properties of SharedArrayBuffer Instances</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-dataview-objects" title="DataView Objects"><span class="secnum">24.3</span> DataView Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-abstract-operations-for-dataview-objects" title="Abstract Operations For DataView Objects"><span class="secnum">24.3.1</span> Abstract Operations For DataView Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-getviewvalue" title="GetViewValue ( view, requestIndex, isLittleEndian, type )"><span class="secnum">24.3.1.1</span> GetViewValue ( <var>view</var>, <var>requestIndex</var>, <var>isLittleEndian</var>, <var>type</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-setviewvalue" title="SetViewValue ( view, requestIndex, isLittleEndian, type, value )"><span class="secnum">24.3.1.2</span> SetViewValue ( <var>view</var>, <var>requestIndex</var>, <var>isLittleEndian</var>, <var>type</var>, <var>value</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-dataview-constructor" title="The DataView Constructor"><span class="secnum">24.3.2</span> The DataView Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-dataview-buffer-byteoffset-bytelength" title="DataView ( buffer [ , byteOffset [ , byteLength ] ] )"><span class="secnum">24.3.2.1</span> DataView ( <var>buffer</var> [ , <var>byteOffset</var> [ , <var>byteLength</var> ] ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-dataview-constructor" title="Properties of the DataView Constructor"><span class="secnum">24.3.3</span> Properties of the DataView Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype" title="DataView.prototype"><span class="secnum">24.3.3.1</span> DataView.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-dataview-prototype-object" title="Properties of the DataView Prototype Object"><span class="secnum">24.3.4</span> Properties of the DataView Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-get-dataview.prototype.buffer" title="get DataView.prototype.buffer"><span class="secnum">24.3.4.1</span> get DataView.prototype.buffer</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-dataview.prototype.bytelength" title="get DataView.prototype.byteLength"><span class="secnum">24.3.4.2</span> get DataView.prototype.byteLength</a></li><li><span class="item-toggle-none"></span><a href="#sec-get-dataview.prototype.byteoffset" title="get DataView.prototype.byteOffset"><span class="secnum">24.3.4.3</span> get DataView.prototype.byteOffset</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.constructor" title="DataView.prototype.constructor"><span class="secnum">24.3.4.4</span> DataView.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.getbigint64" title="DataView.prototype.getBigInt64 ( byteOffset [ , littleEndian ] )"><span class="secnum">24.3.4.5</span> DataView.prototype.getBigInt64 ( <var>byteOffset</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.getbiguint64" title="DataView.prototype.getBigUint64 ( byteOffset [ , littleEndian ] )"><span class="secnum">24.3.4.6</span> DataView.prototype.getBigUint64 ( <var>byteOffset</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.getfloat32" title="DataView.prototype.getFloat32 ( byteOffset [ , littleEndian ] )"><span class="secnum">24.3.4.7</span> DataView.prototype.getFloat32 ( <var>byteOffset</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.getfloat64" title="DataView.prototype.getFloat64 ( byteOffset [ , littleEndian ] )"><span class="secnum">24.3.4.8</span> DataView.prototype.getFloat64 ( <var>byteOffset</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.getint8" title="DataView.prototype.getInt8 ( byteOffset )"><span class="secnum">24.3.4.9</span> DataView.prototype.getInt8 ( <var>byteOffset</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.getint16" title="DataView.prototype.getInt16 ( byteOffset [ , littleEndian ] )"><span class="secnum">24.3.4.10</span> DataView.prototype.getInt16 ( <var>byteOffset</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.getint32" title="DataView.prototype.getInt32 ( byteOffset [ , littleEndian ] )"><span class="secnum">24.3.4.11</span> DataView.prototype.getInt32 ( <var>byteOffset</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.getuint8" title="DataView.prototype.getUint8 ( byteOffset )"><span class="secnum">24.3.4.12</span> DataView.prototype.getUint8 ( <var>byteOffset</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.getuint16" title="DataView.prototype.getUint16 ( byteOffset [ , littleEndian ] )"><span class="secnum">24.3.4.13</span> DataView.prototype.getUint16 ( <var>byteOffset</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.getuint32" title="DataView.prototype.getUint32 ( byteOffset [ , littleEndian ] )"><span class="secnum">24.3.4.14</span> DataView.prototype.getUint32 ( <var>byteOffset</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.setbigint64" title="DataView.prototype.setBigInt64 ( byteOffset, value [ , littleEndian ] )"><span class="secnum">24.3.4.15</span> DataView.prototype.setBigInt64 ( <var>byteOffset</var>, <var>value</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.setbiguint64" title="DataView.prototype.setBigUint64 ( byteOffset, value [ , littleEndian ] )"><span class="secnum">24.3.4.16</span> DataView.prototype.setBigUint64 ( <var>byteOffset</var>, <var>value</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.setfloat32" title="DataView.prototype.setFloat32 ( byteOffset, value [ , littleEndian ] )"><span class="secnum">24.3.4.17</span> DataView.prototype.setFloat32 ( <var>byteOffset</var>, <var>value</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.setfloat64" title="DataView.prototype.setFloat64 ( byteOffset, value [ , littleEndian ] )"><span class="secnum">24.3.4.18</span> DataView.prototype.setFloat64 ( <var>byteOffset</var>, <var>value</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.setint8" title="DataView.prototype.setInt8 ( byteOffset, value )"><span class="secnum">24.3.4.19</span> DataView.prototype.setInt8 ( <var>byteOffset</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.setint16" title="DataView.prototype.setInt16 ( byteOffset, value [ , littleEndian ] )"><span class="secnum">24.3.4.20</span> DataView.prototype.setInt16 ( <var>byteOffset</var>, <var>value</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.setint32" title="DataView.prototype.setInt32 ( byteOffset, value [ , littleEndian ] )"><span class="secnum">24.3.4.21</span> DataView.prototype.setInt32 ( <var>byteOffset</var>, <var>value</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.setuint8" title="DataView.prototype.setUint8 ( byteOffset, value )"><span class="secnum">24.3.4.22</span> DataView.prototype.setUint8 ( <var>byteOffset</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.setuint16" title="DataView.prototype.setUint16 ( byteOffset, value [ , littleEndian ] )"><span class="secnum">24.3.4.23</span> DataView.prototype.setUint16 ( <var>byteOffset</var>, <var>value</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype.setuint32" title="DataView.prototype.setUint32 ( byteOffset, value [ , littleEndian ] )"><span class="secnum">24.3.4.24</span> DataView.prototype.setUint32 ( <var>byteOffset</var>, <var>value</var> [ , <var>littleEndian</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-dataview.prototype-@@tostringtag" title="DataView.prototype [ @@toStringTag ]"><span class="secnum">24.3.4.25</span> DataView.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-dataview-instances" title="Properties of DataView Instances"><span class="secnum">24.3.5</span> Properties of DataView Instances</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-atomics-object" title="The Atomics Object"><span class="secnum">24.4</span> The Atomics Object</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-abstract-operations-for-atomics" title="Abstract Operations for Atomics"><span class="secnum">24.4.1</span> Abstract Operations for Atomics</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-validateintegertypedarray" title="ValidateIntegerTypedArray ( typedArray [ , waitable ] )"><span class="secnum">24.4.1.1</span> ValidateIntegerTypedArray ( <var>typedArray</var> [ , <var>waitable</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-validateatomicaccess" title="ValidateAtomicAccess ( typedArray, requestIndex )"><span class="secnum">24.4.1.2</span> ValidateAtomicAccess ( <var>typedArray</var>, <var>requestIndex</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getwaiterlist" title="GetWaiterList ( block, i )"><span class="secnum">24.4.1.3</span> GetWaiterList ( <var>block</var>, <var>i</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-entercriticalsection" title="EnterCriticalSection ( WL )"><span class="secnum">24.4.1.4</span> EnterCriticalSection ( <var>WL</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-leavecriticalsection" title="LeaveCriticalSection ( WL )"><span class="secnum">24.4.1.5</span> LeaveCriticalSection ( <var>WL</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-addwaiter" title="AddWaiter ( WL, W )"><span class="secnum">24.4.1.6</span> AddWaiter ( <var>WL</var>, <var>W</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-removewaiter" title="RemoveWaiter ( WL, W )"><span class="secnum">24.4.1.7</span> RemoveWaiter ( <var>WL</var>, <var>W</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-removewaiters" title="RemoveWaiters ( WL, c )"><span class="secnum">24.4.1.8</span> RemoveWaiters ( <var>WL</var>, <var>c</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-suspendagent" title="SuspendAgent ( WL, W, timeout )"><span class="secnum">24.4.1.9</span> SuspendAgent ( <var>WL</var>, <var>W</var>, <var>timeout</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-notifywaiter" title="NotifyWaiter ( WL, W )"><span class="secnum">24.4.1.10</span> NotifyWaiter ( <var>WL</var>, <var>W</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomicreadmodifywrite" title="AtomicReadModifyWrite ( typedArray, index, value, op )"><span class="secnum">24.4.1.11</span> AtomicReadModifyWrite ( <var>typedArray</var>, <var>index</var>, <var>value</var>, <var>op</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-bytelistbitwiseop" title="ByteListBitwiseOp ( op, xBytes, yBytes )"><span class="secnum">24.4.1.12</span> ByteListBitwiseOp ( <var>op</var>, <var>xBytes</var>, <var>yBytes</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-bytelistequal" title="ByteListEqual ( xBytes, yBytes )"><span class="secnum">24.4.1.13</span> ByteListEqual ( <var>xBytes</var>, <var>yBytes</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.add" title="Atomics.add ( typedArray, index, value )"><span class="secnum">24.4.2</span> Atomics.add ( <var>typedArray</var>, <var>index</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.and" title="Atomics.and ( typedArray, index, value )"><span class="secnum">24.4.3</span> Atomics.and ( <var>typedArray</var>, <var>index</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.compareexchange" title="Atomics.compareExchange ( typedArray, index, expectedValue, replacementValue )"><span class="secnum">24.4.4</span> Atomics.compareExchange ( <var>typedArray</var>, <var>index</var>, <var>expectedValue</var>, <var>replacementValue</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.exchange" title="Atomics.exchange ( typedArray, index, value )"><span class="secnum">24.4.5</span> Atomics.exchange ( <var>typedArray</var>, <var>index</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.islockfree" title="Atomics.isLockFree ( size )"><span class="secnum">24.4.6</span> Atomics.isLockFree ( <var>size</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.load" title="Atomics.load ( typedArray, index )"><span class="secnum">24.4.7</span> Atomics.load ( <var>typedArray</var>, <var>index</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.or" title="Atomics.or ( typedArray, index, value )"><span class="secnum">24.4.8</span> Atomics.or ( <var>typedArray</var>, <var>index</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.store" title="Atomics.store ( typedArray, index, value )"><span class="secnum">24.4.9</span> Atomics.store ( <var>typedArray</var>, <var>index</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.sub" title="Atomics.sub ( typedArray, index, value )"><span class="secnum">24.4.10</span> Atomics.sub ( <var>typedArray</var>, <var>index</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.wait" title="Atomics.wait ( typedArray, index, value, timeout )"><span class="secnum">24.4.11</span> Atomics.wait ( <var>typedArray</var>, <var>index</var>, <var>value</var>, <var>timeout</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.notify" title="Atomics.notify ( typedArray, index, count )"><span class="secnum">24.4.12</span> Atomics.notify ( <var>typedArray</var>, <var>index</var>, <var>count</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics.xor" title="Atomics.xor ( typedArray, index, value )"><span class="secnum">24.4.13</span> Atomics.xor ( <var>typedArray</var>, <var>index</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-atomics-@@tostringtag" title="Atomics [ @@toStringTag ]"><span class="secnum">24.4.14</span> Atomics [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-json-object" title="The JSON Object"><span class="secnum">24.5</span> The JSON Object</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-json.parse" title="JSON.parse ( text [ , reviver ] )"><span class="secnum">24.5.1</span> JSON.parse ( <var>text</var> [ , <var>reviver</var> ] )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-internalizejsonproperty" title="InternalizeJSONProperty ( holder, name, reviver )"><span class="secnum">24.5.1.1</span> InternalizeJSONProperty ( <var>holder</var>, <var>name</var>, <var>reviver</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-json.stringify" title="JSON.stringify ( value [ , replacer [ , space ] ] )"><span class="secnum">24.5.2</span> JSON.stringify ( <var>value</var> [ , <var>replacer</var> [ , <var>space</var> ] ] )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-serializejsonproperty" title="SerializeJSONProperty ( state, key, holder )"><span class="secnum">24.5.2.1</span> SerializeJSONProperty ( <var>state</var>, <var>key</var>, <var>holder</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-quotejsonstring" title="QuoteJSONString ( value )"><span class="secnum">24.5.2.2</span> QuoteJSONString ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-unicodeescape" title="UnicodeEscape ( C )"><span class="secnum">24.5.2.3</span> UnicodeEscape ( <var>C</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-serializejsonobject" title="SerializeJSONObject ( state, value )"><span class="secnum">24.5.2.4</span> SerializeJSONObject ( <var>state</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-serializejsonarray" title="SerializeJSONArray ( state, value )"><span class="secnum">24.5.2.5</span> SerializeJSONArray ( <var>state</var>, <var>value</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-json-@@tostringtag" title="JSON [ @@toStringTag ]"><span class="secnum">24.5.3</span> JSON [ @@toStringTag ]</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-managing-memory" title="Managing Memory"><span class="secnum">25</span> Managing Memory</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-weak-ref-objects" title="WeakRef Objects"><span class="secnum">25.1</span> WeakRef Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-weak-ref-constructor" title="The WeakRef Constructor"><span class="secnum">25.1.1</span> The WeakRef Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-weak-ref-target" title="WeakRef ( target )"><span class="secnum">25.1.1.1</span> WeakRef ( <var>target</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-weak-ref-constructor" title="Properties of the WeakRef Constructor"><span class="secnum">25.1.2</span> Properties of the WeakRef Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-weak-ref.prototype" title="WeakRef.prototype"><span class="secnum">25.1.2.1</span> WeakRef.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-weak-ref-prototype-object" title="Properties of the WeakRef Prototype Object"><span class="secnum">25.1.3</span> Properties of the WeakRef Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-weak-ref.prototype.constructor" title="WeakRef.prototype.constructor"><span class="secnum">25.1.3.1</span> WeakRef.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-weak-ref.prototype.deref" title="WeakRef.prototype.deref ( )"><span class="secnum">25.1.3.2</span> WeakRef.prototype.deref ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-weak-ref.prototype-@@tostringtag" title="WeakRef.prototype [ @@toStringTag ]"><span class="secnum">25.1.3.3</span> WeakRef.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-weakref-abstract-operations" title="WeakRef Abstract Operations"><span class="secnum">25.1.4</span> WeakRef Abstract Operations</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-weakrefderef" title="WeakRefDeref ( weakRef )"><span class="secnum">25.1.4.1</span> WeakRefDeref ( <var>weakRef</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-weak-ref-instances" title="Properties of WeakRef Instances"><span class="secnum">25.1.5</span> Properties of WeakRef Instances</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-finalization-registry-objects" title="FinalizationRegistry Objects"><span class="secnum">25.2</span> FinalizationRegistry Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-finalization-registry-constructor" title="The FinalizationRegistry Constructor"><span class="secnum">25.2.1</span> The FinalizationRegistry Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-finalization-registry-cleanup-callback" title="FinalizationRegistry ( cleanupCallback )"><span class="secnum">25.2.1.1</span> FinalizationRegistry ( <var>cleanupCallback</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-finalization-registry-constructor" title="Properties of the FinalizationRegistry Constructor"><span class="secnum">25.2.2</span> Properties of the FinalizationRegistry Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-finalization-registry.prototype" title="FinalizationRegistry.prototype"><span class="secnum">25.2.2.1</span> FinalizationRegistry.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-finalization-registry-prototype-object" title="Properties of the FinalizationRegistry Prototype Object"><span class="secnum">25.2.3</span> Properties of the FinalizationRegistry Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-finalization-registry.prototype.constructor" title="FinalizationRegistry.prototype.constructor"><span class="secnum">25.2.3.1</span> FinalizationRegistry.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-finalization-registry.prototype.register" title="FinalizationRegistry.prototype.register ( target, heldValue [ , unregisterToken ] )"><span class="secnum">25.2.3.2</span> FinalizationRegistry.prototype.register ( <var>target</var>, <var>heldValue</var> [ , <var>unregisterToken</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-finalization-registry.prototype.unregister" title="FinalizationRegistry.prototype.unregister ( unregisterToken )"><span class="secnum">25.2.3.3</span> FinalizationRegistry.prototype.unregister ( <var>unregisterToken</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-finalization-registry.prototype-@@tostringtag" title="FinalizationRegistry.prototype [ @@toStringTag ]"><span class="secnum">25.2.3.4</span> FinalizationRegistry.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-finalization-registry-instances" title="Properties of FinalizationRegistry Instances"><span class="secnum">25.2.4</span> Properties of FinalizationRegistry Instances</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-control-abstraction-objects" title="Control Abstraction Objects"><span class="secnum">26</span> Control Abstraction Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-iteration" title="Iteration"><span class="secnum">26.1</span> Iteration</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-common-iteration-interfaces" title="Common Iteration Interfaces"><span class="secnum">26.1.1</span> Common Iteration Interfaces</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-iterable-interface" title="The Iterable Interface"><span class="secnum">26.1.1.1</span> The <i>Iterable</i> Interface</a></li><li><span class="item-toggle-none"></span><a href="#sec-iterator-interface" title="The Iterator Interface"><span class="secnum">26.1.1.2</span> The <i>Iterator</i> Interface</a></li><li><span class="item-toggle-none"></span><a href="#sec-asynciterable-interface" title="The AsyncIterable Interface"><span class="secnum">26.1.1.3</span> The <i>AsyncIterable</i> Interface</a></li><li><span class="item-toggle-none"></span><a href="#sec-asynciterator-interface" title="The AsyncIterator Interface"><span class="secnum">26.1.1.4</span> The <i>AsyncIterator</i> Interface</a></li><li><span class="item-toggle-none"></span><a href="#sec-iteratorresult-interface" title="The IteratorResult Interface"><span class="secnum">26.1.1.5</span> The <i>IteratorResult</i> Interface</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-%iteratorprototype%-object" title="The %IteratorPrototype% Object"><span class="secnum">26.1.2</span> The %IteratorPrototype% Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%iteratorprototype%-@@iterator" title="%IteratorPrototype% [ @@iterator ] ( )"><span class="secnum">26.1.2.1</span> %IteratorPrototype% [ @@iterator ] ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-asynciteratorprototype" title="The %AsyncIteratorPrototype% Object"><span class="secnum">26.1.3</span> The %AsyncIteratorPrototype% Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-asynciteratorprototype-asynciterator" title="%AsyncIteratorPrototype% [ @@asyncIterator ] ( )"><span class="secnum">26.1.3.1</span> %AsyncIteratorPrototype% [ @@asyncIterator ] ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-async-from-sync-iterator-objects" title="Async-from-Sync Iterator Objects"><span class="secnum">26.1.4</span> Async-from-Sync Iterator Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createasyncfromsynciterator" title="CreateAsyncFromSyncIterator ( syncIteratorRecord )"><span class="secnum">26.1.4.1</span> CreateAsyncFromSyncIterator ( <var>syncIteratorRecord</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-%asyncfromsynciteratorprototype%-object" title="The %AsyncFromSyncIteratorPrototype% Object"><span class="secnum">26.1.4.2</span> The %AsyncFromSyncIteratorPrototype% Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-%asyncfromsynciteratorprototype%.next" title="%AsyncFromSyncIteratorPrototype%.next ( [ value ] )"><span class="secnum">26.1.4.2.1</span> %AsyncFromSyncIteratorPrototype%.next ( [ <var>value</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%asyncfromsynciteratorprototype%.return" title="%AsyncFromSyncIteratorPrototype%.return ( [ value ] )"><span class="secnum">26.1.4.2.2</span> %AsyncFromSyncIteratorPrototype%.return ( [ <var>value</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-%asyncfromsynciteratorprototype%.throw" title="%AsyncFromSyncIteratorPrototype%.throw ( [ value ] )"><span class="secnum">26.1.4.2.3</span> %AsyncFromSyncIteratorPrototype%.throw ( [ <var>value</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-from-sync-iterator-value-unwrap-functions" title="Async-from-Sync Iterator Value Unwrap Functions"><span class="secnum">26.1.4.2.4</span> Async-from-Sync Iterator Value Unwrap Functions</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-async-from-sync-iterator-instances" title="Properties of Async-from-Sync Iterator Instances"><span class="secnum">26.1.4.3</span> Properties of Async-from-Sync Iterator Instances</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncfromsynciteratorcontinuation" title="AsyncFromSyncIteratorContinuation ( result, promiseCapability )"><span class="secnum">26.1.4.4</span> AsyncFromSyncIteratorContinuation ( <var>result</var>, <var>promiseCapability</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-generatorfunction-objects" title="GeneratorFunction Objects"><span class="secnum">26.2</span> GeneratorFunction Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-generatorfunction-constructor" title="The GeneratorFunction Constructor"><span class="secnum">26.2.1</span> The GeneratorFunction Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-generatorfunction" title="GeneratorFunction ( p1, p2, … , pn, body )"><span class="secnum">26.2.1.1</span> GeneratorFunction ( <var>p1</var>, <var>p2</var>, … , <var>pn</var>, <var>body</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-generatorfunction-constructor" title="Properties of the GeneratorFunction Constructor"><span class="secnum">26.2.2</span> Properties of the GeneratorFunction Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-generatorfunction.length" title="GeneratorFunction.length"><span class="secnum">26.2.2.1</span> GeneratorFunction.length</a></li><li><span class="item-toggle-none"></span><a href="#sec-generatorfunction.prototype" title="GeneratorFunction.prototype"><span class="secnum">26.2.2.2</span> GeneratorFunction.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-generatorfunction-prototype-object" title="Properties of the GeneratorFunction Prototype Object"><span class="secnum">26.2.3</span> Properties of the GeneratorFunction Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-generatorfunction.prototype.constructor" title="GeneratorFunction.prototype.constructor"><span class="secnum">26.2.3.1</span> GeneratorFunction.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-generatorfunction.prototype.prototype" title="GeneratorFunction.prototype.prototype"><span class="secnum">26.2.3.2</span> GeneratorFunction.prototype.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-generatorfunction.prototype-@@tostringtag" title="GeneratorFunction.prototype [ @@toStringTag ]"><span class="secnum">26.2.3.3</span> GeneratorFunction.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-generatorfunction-instances" title="GeneratorFunction Instances"><span class="secnum">26.2.4</span> GeneratorFunction Instances</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-generatorfunction-instances-length" title="length"><span class="secnum">26.2.4.1</span> length</a></li><li><span class="item-toggle-none"></span><a href="#sec-generatorfunction-instances-name" title="name"><span class="secnum">26.2.4.2</span> name</a></li><li><span class="item-toggle-none"></span><a href="#sec-generatorfunction-instances-prototype" title="prototype"><span class="secnum">26.2.4.3</span> prototype</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-asyncgeneratorfunction-objects" title="AsyncGeneratorFunction Objects"><span class="secnum">26.3</span> AsyncGeneratorFunction Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-asyncgeneratorfunction-constructor" title="The AsyncGeneratorFunction Constructor"><span class="secnum">26.3.1</span> The AsyncGeneratorFunction Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorfunction" title="AsyncGeneratorFunction ( p1, p2, … , pn, body )"><span class="secnum">26.3.1.1</span> AsyncGeneratorFunction ( <var>p1</var>, <var>p2</var>, … , <var>pn</var>, <var>body</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-asyncgeneratorfunction" title="Properties of the AsyncGeneratorFunction Constructor"><span class="secnum">26.3.2</span> Properties of the AsyncGeneratorFunction Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorfunction-length" title="AsyncGeneratorFunction.length"><span class="secnum">26.3.2.1</span> AsyncGeneratorFunction.length</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorfunction-prototype" title="AsyncGeneratorFunction.prototype"><span class="secnum">26.3.2.2</span> AsyncGeneratorFunction.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-asyncgeneratorfunction-prototype" title="Properties of the AsyncGeneratorFunction Prototype Object"><span class="secnum">26.3.3</span> Properties of the AsyncGeneratorFunction Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorfunction-prototype-constructor" title="AsyncGeneratorFunction.prototype.constructor"><span class="secnum">26.3.3.1</span> AsyncGeneratorFunction.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorfunction-prototype-prototype" title="AsyncGeneratorFunction.prototype.prototype"><span class="secnum">26.3.3.2</span> AsyncGeneratorFunction.prototype.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorfunction-prototype-tostringtag" title="AsyncGeneratorFunction.prototype [ @@toStringTag ]"><span class="secnum">26.3.3.3</span> AsyncGeneratorFunction.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-asyncgeneratorfunction-instances" title="AsyncGeneratorFunction Instances"><span class="secnum">26.3.4</span> AsyncGeneratorFunction Instances</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorfunction-instance-length" title="length"><span class="secnum">26.3.4.1</span> length</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorfunction-instance-name" title="name"><span class="secnum">26.3.4.2</span> name</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorfunction-instance-prototype" title="prototype"><span class="secnum">26.3.4.3</span> prototype</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-generator-objects" title="Generator Objects"><span class="secnum">26.4</span> Generator Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-properties-of-generator-prototype" title="Properties of the Generator Prototype Object"><span class="secnum">26.4.1</span> Properties of the Generator Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-generator.prototype.constructor" title="Generator.prototype.constructor"><span class="secnum">26.4.1.1</span> Generator.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator.prototype.next" title="Generator.prototype.next ( value )"><span class="secnum">26.4.1.2</span> Generator.prototype.next ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator.prototype.return" title="Generator.prototype.return ( value )"><span class="secnum">26.4.1.3</span> Generator.prototype.return ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator.prototype.throw" title="Generator.prototype.throw ( exception )"><span class="secnum">26.4.1.4</span> Generator.prototype.throw ( <var>exception</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-generator.prototype-@@tostringtag" title="Generator.prototype [ @@toStringTag ]"><span class="secnum">26.4.1.5</span> Generator.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-generator-instances" title="Properties of Generator Instances"><span class="secnum">26.4.2</span> Properties of Generator Instances</a></li><li><span class="item-toggle">◢</span><a href="#sec-generator-abstract-operations" title="Generator Abstract Operations"><span class="secnum">26.4.3</span> Generator Abstract Operations</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-generatorstart" title="GeneratorStart ( generator, generatorBody )"><span class="secnum">26.4.3.1</span> GeneratorStart ( <var>generator</var>, <var>generatorBody</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-generatorvalidate" title="GeneratorValidate ( generator )"><span class="secnum">26.4.3.2</span> GeneratorValidate ( <var>generator</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-generatorresume" title="GeneratorResume ( generator, value )"><span class="secnum">26.4.3.3</span> GeneratorResume ( <var>generator</var>, <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-generatorresumeabrupt" title="GeneratorResumeAbrupt ( generator, abruptCompletion )"><span class="secnum">26.4.3.4</span> GeneratorResumeAbrupt ( <var>generator</var>, <var>abruptCompletion</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getgeneratorkind" title="GetGeneratorKind ( )"><span class="secnum">26.4.3.5</span> GetGeneratorKind ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-generatoryield" title="GeneratorYield ( iterNextObj )"><span class="secnum">26.4.3.6</span> GeneratorYield ( <var>iterNextObj</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-asyncgenerator-objects" title="AsyncGenerator Objects"><span class="secnum">26.5</span> AsyncGenerator Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-properties-of-asyncgenerator-prototype" title="Properties of the AsyncGenerator Prototype Object"><span class="secnum">26.5.1</span> Properties of the AsyncGenerator Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-asyncgenerator-prototype-constructor" title="AsyncGenerator.prototype.constructor"><span class="secnum">26.5.1.1</span> AsyncGenerator.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgenerator-prototype-next" title="AsyncGenerator.prototype.next ( value )"><span class="secnum">26.5.1.2</span> AsyncGenerator.prototype.next ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgenerator-prototype-return" title="AsyncGenerator.prototype.return ( value )"><span class="secnum">26.5.1.3</span> AsyncGenerator.prototype.return ( <var>value</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgenerator-prototype-throw" title="AsyncGenerator.prototype.throw ( exception )"><span class="secnum">26.5.1.4</span> AsyncGenerator.prototype.throw ( <var>exception</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgenerator-prototype-tostringtag" title="AsyncGenerator.prototype [ @@toStringTag ]"><span class="secnum">26.5.1.5</span> AsyncGenerator.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-asyncgenerator-intances" title="Properties of AsyncGenerator Instances"><span class="secnum">26.5.2</span> Properties of AsyncGenerator Instances</a></li><li><span class="item-toggle">◢</span><a href="#sec-asyncgenerator-abstract-operations" title="AsyncGenerator Abstract Operations"><span class="secnum">26.5.3</span> AsyncGenerator Abstract Operations</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorrequest-records" title="AsyncGeneratorRequest Records"><span class="secnum">26.5.3.1</span> AsyncGeneratorRequest Records</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorstart" title="AsyncGeneratorStart ( generator, generatorBody )"><span class="secnum">26.5.3.2</span> AsyncGeneratorStart ( <var>generator</var>, <var>generatorBody</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorresolve" title="AsyncGeneratorResolve ( generator, value, done )"><span class="secnum">26.5.3.3</span> AsyncGeneratorResolve ( <var>generator</var>, <var>value</var>, <var>done</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorreject" title="AsyncGeneratorReject ( generator, exception )"><span class="secnum">26.5.3.4</span> AsyncGeneratorReject ( <var>generator</var>, <var>exception</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-asyncgeneratorresumenext" title="AsyncGeneratorResumeNext ( generator )"><span class="secnum">26.5.3.5</span> AsyncGeneratorResumeNext ( <var>generator</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#async-generator-resume-next-return-processor-fulfilled" title="AsyncGeneratorResumeNext Return Processor Fulfilled Functions"><span class="secnum">26.5.3.5.1</span> AsyncGeneratorResumeNext Return Processor Fulfilled Functions</a></li><li><span class="item-toggle-none"></span><a href="#async-generator-resume-next-return-processor-rejected" title="AsyncGeneratorResumeNext Return Processor Rejected Functions"><span class="secnum">26.5.3.5.2</span> AsyncGeneratorResumeNext Return Processor Rejected Functions</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratorenqueue" title="AsyncGeneratorEnqueue ( generator, completion )"><span class="secnum">26.5.3.6</span> AsyncGeneratorEnqueue ( <var>generator</var>, <var>completion</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-asyncgeneratoryield" title="AsyncGeneratorYield ( value )"><span class="secnum">26.5.3.7</span> AsyncGeneratorYield ( <var>value</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-promise-objects" title="Promise Objects"><span class="secnum">26.6</span> Promise Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-promise-abstract-operations" title="Promise Abstract Operations"><span class="secnum">26.6.1</span> Promise Abstract Operations</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-promisecapability-records" title="PromiseCapability Records"><span class="secnum">26.6.1.1</span> PromiseCapability Records</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-ifabruptrejectpromise" title="IfAbruptRejectPromise ( value, capability )"><span class="secnum">26.6.1.1.1</span> IfAbruptRejectPromise ( <var>value</var>, <var>capability</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-promisereaction-records" title="PromiseReaction Records"><span class="secnum">26.6.1.2</span> PromiseReaction Records</a></li><li><span class="item-toggle">◢</span><a href="#sec-createresolvingfunctions" title="CreateResolvingFunctions ( promise )"><span class="secnum">26.6.1.3</span> CreateResolvingFunctions ( <var>promise</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-promise-reject-functions" title="Promise Reject Functions"><span class="secnum">26.6.1.3.1</span> Promise Reject Functions</a></li><li><span class="item-toggle-none"></span><a href="#sec-promise-resolve-functions" title="Promise Resolve Functions"><span class="secnum">26.6.1.3.2</span> Promise Resolve Functions</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-fulfillpromise" title="FulfillPromise ( promise, value )"><span class="secnum">26.6.1.4</span> FulfillPromise ( <var>promise</var>, <var>value</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-newpromisecapability" title="NewPromiseCapability ( C )"><span class="secnum">26.6.1.5</span> NewPromiseCapability ( <var>C</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-getcapabilitiesexecutor-functions" title="GetCapabilitiesExecutor Functions"><span class="secnum">26.6.1.5.1</span> GetCapabilitiesExecutor Functions</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-ispromise" title="IsPromise ( x )"><span class="secnum">26.6.1.6</span> IsPromise ( <var>x</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-rejectpromise" title="RejectPromise ( promise, reason )"><span class="secnum">26.6.1.7</span> RejectPromise ( <var>promise</var>, <var>reason</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-triggerpromisereactions" title="TriggerPromiseReactions ( reactions, argument )"><span class="secnum">26.6.1.8</span> TriggerPromiseReactions ( <var>reactions</var>, <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-host-promise-rejection-tracker" title="HostPromiseRejectionTracker ( promise, operation )"><span class="secnum">26.6.1.9</span> HostPromiseRejectionTracker ( <var>promise</var>, <var>operation</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-promise-jobs" title="Promise Jobs"><span class="secnum">26.6.2</span> Promise Jobs</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-newpromisereactionjob" title="NewPromiseReactionJob ( reaction, argument )"><span class="secnum">26.6.2.1</span> NewPromiseReactionJob ( <var>reaction</var>, <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-newpromiseresolvethenablejob" title="NewPromiseResolveThenableJob ( promiseToResolve, thenable, then )"><span class="secnum">26.6.2.2</span> NewPromiseResolveThenableJob ( <var>promiseToResolve</var>, <var>thenable</var>, <var>then</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-promise-constructor" title="The Promise Constructor"><span class="secnum">26.6.3</span> The Promise Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-promise-executor" title="Promise ( executor )"><span class="secnum">26.6.3.1</span> Promise ( <var>executor</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-promise-constructor" title="Properties of the Promise Constructor"><span class="secnum">26.6.4</span> Properties of the Promise Constructor</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-promise.all" title="Promise.all ( iterable )"><span class="secnum">26.6.4.1</span> Promise.all ( <var>iterable</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-getpromiseresolve" title="GetPromiseResolve ( promiseConstructor )"><span class="secnum">26.6.4.1.1</span> GetPromiseResolve ( <var>promiseConstructor</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-performpromiseall" title="PerformPromiseAll ( iteratorRecord, constructor, resultCapability, promiseResolve )"><span class="secnum">26.6.4.1.2</span> PerformPromiseAll ( <var>iteratorRecord</var>, <var>constructor</var>, <var>resultCapability</var>, <var>promiseResolve</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-promise.all-resolve-element-functions" title="Promise.all Resolve Element Functions"><span class="secnum">26.6.4.1.3</span> <code>Promise.all</code> Resolve Element Functions</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-promise.allsettled" title="Promise.allSettled ( iterable )"><span class="secnum">26.6.4.2</span> Promise.allSettled ( <var>iterable</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-performpromiseallsettled" title="PerformPromiseAllSettled ( iteratorRecord, constructor, resultCapability, promiseResolve )"><span class="secnum">26.6.4.2.1</span> PerformPromiseAllSettled ( <var>iteratorRecord</var>, <var>constructor</var>, <var>resultCapability</var>, <var>promiseResolve</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-promise.allsettled-resolve-element-functions" title="Promise.allSettled Resolve Element Functions"><span class="secnum">26.6.4.2.2</span> <code>Promise.allSettled</code> Resolve Element Functions</a></li><li><span class="item-toggle-none"></span><a href="#sec-promise.allsettled-reject-element-functions" title="Promise.allSettled Reject Element Functions"><span class="secnum">26.6.4.2.3</span> <code>Promise.allSettled</code> Reject Element Functions</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-promise.any" title="Promise.any ( iterable )"><span class="secnum">26.6.4.3</span> Promise.any ( <var>iterable</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-performpromiseany" title="PerformPromiseAny ( iteratorRecord, constructor, resultCapability, promiseResolve )"><span class="secnum">26.6.4.3.1</span> PerformPromiseAny ( <var>iteratorRecord</var>, <var>constructor</var>, <var>resultCapability</var>, <var>promiseResolve</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-promise.any-reject-element-functions" title="Promise.any Reject Element Functions"><span class="secnum">26.6.4.3.2</span> <code>Promise.any</code> Reject Element Functions</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-promise.prototype" title="Promise.prototype"><span class="secnum">26.6.4.4</span> Promise.prototype</a></li><li><span class="item-toggle">◢</span><a href="#sec-promise.race" title="Promise.race ( iterable )"><span class="secnum">26.6.4.5</span> Promise.race ( <var>iterable</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-performpromiserace" title="PerformPromiseRace ( iteratorRecord, constructor, resultCapability, promiseResolve )"><span class="secnum">26.6.4.5.1</span> PerformPromiseRace ( <var>iteratorRecord</var>, <var>constructor</var>, <var>resultCapability</var>, <var>promiseResolve</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-promise.reject" title="Promise.reject ( r )"><span class="secnum">26.6.4.6</span> Promise.reject ( <var>r</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-promise.resolve" title="Promise.resolve ( x )"><span class="secnum">26.6.4.7</span> Promise.resolve ( <var>x</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-promise-resolve" title="PromiseResolve ( C, x )"><span class="secnum">26.6.4.7.1</span> PromiseResolve ( <var>C</var>, <var>x</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-get-promise-@@species" title="get Promise [ @@species ]"><span class="secnum">26.6.4.8</span> get Promise [ @@species ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-promise-prototype-object" title="Properties of the Promise Prototype Object"><span class="secnum">26.6.5</span> Properties of the Promise Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-promise.prototype.catch" title="Promise.prototype.catch ( onRejected )"><span class="secnum">26.6.5.1</span> Promise.prototype.catch ( <var>onRejected</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-promise.prototype.constructor" title="Promise.prototype.constructor"><span class="secnum">26.6.5.2</span> Promise.prototype.constructor</a></li><li><span class="item-toggle">◢</span><a href="#sec-promise.prototype.finally" title="Promise.prototype.finally ( onFinally )"><span class="secnum">26.6.5.3</span> Promise.prototype.finally ( <var>onFinally</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-thenfinallyfunctions" title="Then Finally Functions"><span class="secnum">26.6.5.3.1</span> Then Finally Functions</a></li><li><span class="item-toggle-none"></span><a href="#sec-catchfinallyfunctions" title="Catch Finally Functions"><span class="secnum">26.6.5.3.2</span> Catch Finally Functions</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-promise.prototype.then" title="Promise.prototype.then ( onFulfilled, onRejected )"><span class="secnum">26.6.5.4</span> Promise.prototype.then ( <var>onFulfilled</var>, <var>onRejected</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-performpromisethen" title="PerformPromiseThen ( promise, onFulfilled, onRejected [ , resultCapability ] )"><span class="secnum">26.6.5.4.1</span> PerformPromiseThen ( <var>promise</var>, <var>onFulfilled</var>, <var>onRejected</var> [ , <var>resultCapability</var> ] )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-promise.prototype-@@tostringtag" title="Promise.prototype [ @@toStringTag ]"><span class="secnum">26.6.5.5</span> Promise.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-promise-instances" title="Properties of Promise Instances"><span class="secnum">26.6.6</span> Properties of Promise Instances</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-async-function-objects" title="AsyncFunction Objects"><span class="secnum">26.7</span> AsyncFunction Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-async-function-constructor" title="The AsyncFunction Constructor"><span class="secnum">26.7.1</span> The AsyncFunction Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-async-function-constructor-arguments" title="AsyncFunction ( p1, p2, … , pn, body )"><span class="secnum">26.7.1.1</span> AsyncFunction ( <var>p1</var>, <var>p2</var>, … , <var>pn</var>, <var>body</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-async-function-constructor-properties" title="Properties of the AsyncFunction Constructor"><span class="secnum">26.7.2</span> Properties of the AsyncFunction Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-async-function-constructor-length" title="AsyncFunction.length"><span class="secnum">26.7.2.1</span> AsyncFunction.length</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-constructor-prototype" title="AsyncFunction.prototype"><span class="secnum">26.7.2.2</span> AsyncFunction.prototype</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-async-function-prototype-properties" title="Properties of the AsyncFunction Prototype Object"><span class="secnum">26.7.3</span> Properties of the AsyncFunction Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-async-function-prototype-properties-constructor" title="AsyncFunction.prototype.constructor"><span class="secnum">26.7.3.1</span> AsyncFunction.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-prototype-properties-toStringTag" title="AsyncFunction.prototype [ @@toStringTag ]"><span class="secnum">26.7.3.2</span> AsyncFunction.prototype [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-async-function-instances" title="AsyncFunction Instances"><span class="secnum">26.7.4</span> AsyncFunction Instances</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-async-function-instances-length" title="length"><span class="secnum">26.7.4.1</span> length</a></li><li><span class="item-toggle-none"></span><a href="#sec-async-function-instances-name" title="name"><span class="secnum">26.7.4.2</span> name</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-async-functions-abstract-operations" title="Async Functions Abstract Operations"><span class="secnum">26.7.5</span> Async Functions Abstract Operations</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-async-functions-abstract-operations-async-function-start" title="AsyncFunctionStart ( promiseCapability, asyncFunctionBody )"><span class="secnum">26.7.5.1</span> AsyncFunctionStart ( <var>promiseCapability</var>, <var>asyncFunctionBody</var> )</a></li></ol></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-reflection" title="Reflection"><span class="secnum">27</span> Reflection</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-reflect-object" title="The Reflect Object"><span class="secnum">27.1</span> The Reflect Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-reflect.apply" title="Reflect.apply ( target, thisArgument, argumentsList )"><span class="secnum">27.1.1</span> Reflect.apply ( <var>target</var>, <var>thisArgument</var>, <var>argumentsList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.construct" title="Reflect.construct ( target, argumentsList [ , newTarget ] )"><span class="secnum">27.1.2</span> Reflect.construct ( <var>target</var>, <var>argumentsList</var> [ , <var>newTarget</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.defineproperty" title="Reflect.defineProperty ( target, propertyKey, attributes )"><span class="secnum">27.1.3</span> Reflect.defineProperty ( <var>target</var>, <var>propertyKey</var>, <var>attributes</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.deleteproperty" title="Reflect.deleteProperty ( target, propertyKey )"><span class="secnum">27.1.4</span> Reflect.deleteProperty ( <var>target</var>, <var>propertyKey</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.get" title="Reflect.get ( target, propertyKey [ , receiver ] )"><span class="secnum">27.1.5</span> Reflect.get ( <var>target</var>, <var>propertyKey</var> [ , <var>receiver</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.getownpropertydescriptor" title="Reflect.getOwnPropertyDescriptor ( target, propertyKey )"><span class="secnum">27.1.6</span> Reflect.getOwnPropertyDescriptor ( <var>target</var>, <var>propertyKey</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.getprototypeof" title="Reflect.getPrototypeOf ( target )"><span class="secnum">27.1.7</span> Reflect.getPrototypeOf ( <var>target</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.has" title="Reflect.has ( target, propertyKey )"><span class="secnum">27.1.8</span> Reflect.has ( <var>target</var>, <var>propertyKey</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.isextensible" title="Reflect.isExtensible ( target )"><span class="secnum">27.1.9</span> Reflect.isExtensible ( <var>target</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.ownkeys" title="Reflect.ownKeys ( target )"><span class="secnum">27.1.10</span> Reflect.ownKeys ( <var>target</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.preventextensions" title="Reflect.preventExtensions ( target )"><span class="secnum">27.1.11</span> Reflect.preventExtensions ( <var>target</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.set" title="Reflect.set ( target, propertyKey, V [ , receiver ] )"><span class="secnum">27.1.12</span> Reflect.set ( <var>target</var>, <var>propertyKey</var>, <var>V</var> [ , <var>receiver</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect.setprototypeof" title="Reflect.setPrototypeOf ( target, proto )"><span class="secnum">27.1.13</span> Reflect.setPrototypeOf ( <var>target</var>, <var>proto</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-reflect-@@tostringtag" title="Reflect [ @@toStringTag ]"><span class="secnum">27.1.14</span> Reflect [ @@toStringTag ]</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-proxy-objects" title="Proxy Objects"><span class="secnum">27.2</span> Proxy Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-proxy-constructor" title="The Proxy Constructor"><span class="secnum">27.2.1</span> The Proxy Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-proxy-target-handler" title="Proxy ( target, handler )"><span class="secnum">27.2.1.1</span> Proxy ( <var>target</var>, <var>handler</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-the-proxy-constructor" title="Properties of the Proxy Constructor"><span class="secnum">27.2.2</span> Properties of the Proxy Constructor</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-proxy.revocable" title="Proxy.revocable ( target, handler )"><span class="secnum">27.2.2.1</span> Proxy.revocable ( <var>target</var>, <var>handler</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-proxy-revocation-functions" title="Proxy Revocation Functions"><span class="secnum">27.2.2.1.1</span> Proxy Revocation Functions</a></li></ol></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-module-namespace-objects" title="Module Namespace Objects"><span class="secnum">27.3</span> Module Namespace Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-@@tostringtag" title="@@toStringTag"><span class="secnum">27.3.1</span> @@toStringTag</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-memory-model" title="Memory Model"><span class="secnum">28</span> Memory Model</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-memory-model-fundamentals" title="Memory Model Fundamentals"><span class="secnum">28.1</span> Memory Model Fundamentals</a></li><li><span class="item-toggle-none"></span><a href="#sec-agent-event-records" title="Agent Events Records"><span class="secnum">28.2</span> Agent Events Records</a></li><li><span class="item-toggle-none"></span><a href="#sec-chosen-value-records" title="Chosen Value Records"><span class="secnum">28.3</span> Chosen Value Records</a></li><li><span class="item-toggle-none"></span><a href="#sec-candidate-executions" title="Candidate Executions"><span class="secnum">28.4</span> Candidate Executions</a></li><li><span class="item-toggle">◢</span><a href="#sec-abstract-operations-for-the-memory-model" title="Abstract Operations for the Memory Model"><span class="secnum">28.5</span> Abstract Operations for the Memory Model</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-event-set" title="EventSet ( execution )"><span class="secnum">28.5.1</span> EventSet ( <var>execution</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-sharedatablockeventset" title="SharedDataBlockEventSet ( execution )"><span class="secnum">28.5.2</span> SharedDataBlockEventSet ( <var>execution</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-hosteventset" title="HostEventSet ( execution )"><span class="secnum">28.5.3</span> HostEventSet ( <var>execution</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-composewriteeventbytes" title="ComposeWriteEventBytes ( execution, byteIndex, Ws )"><span class="secnum">28.5.4</span> ComposeWriteEventBytes ( <var>execution</var>, <var>byteIndex</var>, <var>Ws</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-valueofreadevent" title="ValueOfReadEvent ( execution, R )"><span class="secnum">28.5.5</span> ValueOfReadEvent ( <var>execution</var>, <var>R</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-relations-of-candidate-executions" title="Relations of Candidate Executions"><span class="secnum">28.6</span> Relations of Candidate Executions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-agent-order" title="agent-order"><span class="secnum">28.6.1</span> agent-order</a></li><li><span class="item-toggle-none"></span><a href="#sec-reads-bytes-from" title="reads-bytes-from"><span class="secnum">28.6.2</span> reads-bytes-from</a></li><li><span class="item-toggle-none"></span><a href="#sec-reads-from" title="reads-from"><span class="secnum">28.6.3</span> reads-from</a></li><li><span class="item-toggle-none"></span><a href="#sec-host-synchronizes-with" title="host-synchronizes-with"><span class="secnum">28.6.4</span> host-synchronizes-with</a></li><li><span class="item-toggle-none"></span><a href="#sec-synchronizes-with" title="synchronizes-with"><span class="secnum">28.6.5</span> synchronizes-with</a></li><li><span class="item-toggle-none"></span><a href="#sec-happens-before" title="happens-before"><span class="secnum">28.6.6</span> happens-before</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-valid-executions" title="Properties of Valid Executions"><span class="secnum">28.7</span> Properties of Valid Executions</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-valid-chosen-reads" title="Valid Chosen Reads"><span class="secnum">28.7.1</span> Valid Chosen Reads</a></li><li><span class="item-toggle-none"></span><a href="#sec-coherent-reads" title="Coherent Reads"><span class="secnum">28.7.2</span> Coherent Reads</a></li><li><span class="item-toggle-none"></span><a href="#sec-tear-free-aligned-reads" title="Tear Free Reads"><span class="secnum">28.7.3</span> Tear Free Reads</a></li><li><span class="item-toggle-none"></span><a href="#sec-memory-order" title="Sequentially Consistent Atomics"><span class="secnum">28.7.4</span> Sequentially Consistent Atomics</a></li><li><span class="item-toggle-none"></span><a href="#sec-valid-executions" title="Valid Executions"><span class="secnum">28.7.5</span> Valid Executions</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-races" title="Races"><span class="secnum">28.8</span> Races</a></li><li><span class="item-toggle-none"></span><a href="#sec-data-races" title="Data Races"><span class="secnum">28.9</span> Data Races</a></li><li><span class="item-toggle-none"></span><a href="#sec-data-race-freedom" title="Data Race Freedom"><span class="secnum">28.10</span> Data Race Freedom</a></li><li><span class="item-toggle-none"></span><a href="#sec-shared-memory-guidelines" title="Shared Memory Guidelines"><span class="secnum">28.11</span> Shared Memory Guidelines</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-grammar-summary" title="Grammar Summary"><span class="secnum">A</span> Grammar Summary</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-lexical-grammar" title="Lexical Grammar"><span class="secnum">A.1</span> Lexical Grammar</a></li><li><span class="item-toggle-none"></span><a href="#sec-expressions" title="Expressions"><span class="secnum">A.2</span> Expressions</a></li><li><span class="item-toggle-none"></span><a href="#sec-statements" title="Statements"><span class="secnum">A.3</span> Statements</a></li><li><span class="item-toggle-none"></span><a href="#sec-functions-and-classes" title="Functions and Classes"><span class="secnum">A.4</span> Functions and Classes</a></li><li><span class="item-toggle-none"></span><a href="#sec-scripts-and-modules" title="Scripts and Modules"><span class="secnum">A.5</span> Scripts and Modules</a></li><li><span class="item-toggle-none"></span><a href="#sec-number-conversions" title="Number Conversions"><span class="secnum">A.6</span> Number Conversions</a></li><li><span class="item-toggle-none"></span><a href="#sec-universal-resource-identifier-character-classes" title="Universal Resource Identifier Character Classes"><span class="secnum">A.7</span> Universal Resource Identifier Character Classes</a></li><li><span class="item-toggle-none"></span><a href="#sec-regular-expressions" title="Regular Expressions"><span class="secnum">A.8</span> Regular Expressions</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-additional-ecmascript-features-for-web-browsers" title="Additional ECMAScript Features for Web Browsers"><span class="secnum">B</span> Additional ECMAScript Features for Web Browsers</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-additional-syntax" title="Additional Syntax"><span class="secnum">B.1</span> Additional Syntax</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-additional-syntax-numeric-literals" title="Numeric Literals"><span class="secnum">B.1.1</span> Numeric Literals</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-additional-syntax-numeric-literals-status-semantics" title="Static Semantics"><span class="secnum">B.1.1.1</span> Static Semantics</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-additional-syntax-string-literals" title="String Literals"><span class="secnum">B.1.2</span> String Literals</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-additional-syntax-string-literals-static-semantics" title="Static Semantics"><span class="secnum">B.1.2.1</span> Static Semantics</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-html-like-comments" title="HTML-like Comments"><span class="secnum">B.1.3</span> HTML-like Comments</a></li><li><span class="item-toggle">◢</span><a href="#sec-regular-expressions-patterns" title="Regular Expressions Patterns"><span class="secnum">B.1.4</span> Regular Expressions Patterns</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-patterns-static-semantics-early-errors-annexb" title="Static Semantics: Early Errors"><span class="secnum">B.1.4.1</span> SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-patterns-static-semantics-is-character-class-annexb" title="Static Semantics: IsCharacterClass"><span class="secnum">B.1.4.2</span> SS: IsCharacterClass</a></li><li><span class="item-toggle-none"></span><a href="#sec-patterns-static-semantics-character-value-annexb" title="Static Semantics: CharacterValue"><span class="secnum">B.1.4.3</span> SS: CharacterValue</a></li><li><span class="item-toggle">◢</span><a href="#sec-regular-expression-patterns-semantics" title="Pattern Semantics"><span class="secnum">B.1.4.4</span> Pattern Semantics</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-runtime-semantics-characterrangeorunion-abstract-operation" title="CharacterRangeOrUnion ( A, B )"><span class="secnum">B.1.4.4.1</span> CharacterRangeOrUnion ( <var>A</var>, <var>B</var> )</a></li></ol></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-additional-built-in-properties" title="Additional Built-in Properties"><span class="secnum">B.2</span> Additional Built-in Properties</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-additional-properties-of-the-global-object" title="Additional Properties of the Global Object"><span class="secnum">B.2.1</span> Additional Properties of the Global Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-escape-string" title="escape ( string )"><span class="secnum">B.2.1.1</span> escape ( <var>string</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-unescape-string" title="unescape ( string )"><span class="secnum">B.2.1.2</span> unescape ( <var>string</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-additional-properties-of-the-object.prototype-object" title="Additional Properties of the Object.prototype Object"><span class="secnum">B.2.2</span> Additional Properties of the Object.prototype Object</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-object.prototype.__proto__" title="Object.prototype.__proto__"><span class="secnum">B.2.2.1</span> Object.prototype.__proto__</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-get-object.prototype.__proto__" title="get Object.prototype.__proto__"><span class="secnum">B.2.2.1.1</span> get Object.prototype.__proto__</a></li><li><span class="item-toggle-none"></span><a href="#sec-set-object.prototype.__proto__" title="set Object.prototype.__proto__"><span class="secnum">B.2.2.1.2</span> set Object.prototype.__proto__</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-object.prototype.__defineGetter__" title="Object.prototype.__defineGetter__ ( P, getter )"><span class="secnum">B.2.2.2</span> Object.prototype.__defineGetter__ ( <var>P</var>, <var>getter</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.prototype.__defineSetter__" title="Object.prototype.__defineSetter__ ( P, setter )"><span class="secnum">B.2.2.3</span> Object.prototype.__defineSetter__ ( <var>P</var>, <var>setter</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.prototype.__lookupGetter__" title="Object.prototype.__lookupGetter__ ( P )"><span class="secnum">B.2.2.4</span> Object.prototype.__lookupGetter__ ( <var>P</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-object.prototype.__lookupSetter__" title="Object.prototype.__lookupSetter__ ( P )"><span class="secnum">B.2.2.5</span> Object.prototype.__lookupSetter__ ( <var>P</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-additional-properties-of-the-string.prototype-object" title="Additional Properties of the String.prototype Object"><span class="secnum">B.2.3</span> Additional Properties of the String.prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.substr" title="String.prototype.substr ( start, length )"><span class="secnum">B.2.3.1</span> String.prototype.substr ( <var>start</var>, <var>length</var> )</a></li><li><span class="item-toggle">◢</span><a href="#sec-string.prototype.anchor" title="String.prototype.anchor ( name )"><span class="secnum">B.2.3.2</span> String.prototype.anchor ( <var>name</var> )</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-createhtml" title="CreateHTML ( string, tag, attribute, value )"><span class="secnum">B.2.3.2.1</span> CreateHTML ( <var>string</var>, <var>tag</var>, <var>attribute</var>, <var>value</var> )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.big" title="String.prototype.big ( )"><span class="secnum">B.2.3.3</span> String.prototype.big ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.blink" title="String.prototype.blink ( )"><span class="secnum">B.2.3.4</span> String.prototype.blink ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.bold" title="String.prototype.bold ( )"><span class="secnum">B.2.3.5</span> String.prototype.bold ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.fixed" title="String.prototype.fixed ( )"><span class="secnum">B.2.3.6</span> String.prototype.fixed ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.fontcolor" title="String.prototype.fontcolor ( color )"><span class="secnum">B.2.3.7</span> String.prototype.fontcolor ( <var>color</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.fontsize" title="String.prototype.fontsize ( size )"><span class="secnum">B.2.3.8</span> String.prototype.fontsize ( <var>size</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.italics" title="String.prototype.italics ( )"><span class="secnum">B.2.3.9</span> String.prototype.italics ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.link" title="String.prototype.link ( url )"><span class="secnum">B.2.3.10</span> String.prototype.link ( <var>url</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.small" title="String.prototype.small ( )"><span class="secnum">B.2.3.11</span> String.prototype.small ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.strike" title="String.prototype.strike ( )"><span class="secnum">B.2.3.12</span> String.prototype.strike ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.sub" title="String.prototype.sub ( )"><span class="secnum">B.2.3.13</span> String.prototype.sub ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-string.prototype.sup" title="String.prototype.sup ( )"><span class="secnum">B.2.3.14</span> String.prototype.sup ( )</a></li><li><span class="item-toggle-none"></span><a href="#String.prototype.trimleft" title="String.prototype.trimLeft ( )"><span class="secnum">B.2.3.15</span> String.prototype.trimLeft ( )</a></li><li><span class="item-toggle-none"></span><a href="#String.prototype.trimright" title="String.prototype.trimRight ( )"><span class="secnum">B.2.3.16</span> String.prototype.trimRight ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-additional-properties-of-the-date.prototype-object" title="Additional Properties of the Date.prototype Object"><span class="secnum">B.2.4</span> Additional Properties of the Date.prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.getyear" title="Date.prototype.getYear ( )"><span class="secnum">B.2.4.1</span> Date.prototype.getYear ( )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.setyear" title="Date.prototype.setYear ( year )"><span class="secnum">B.2.4.2</span> Date.prototype.setYear ( <var>year</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-date.prototype.togmtstring" title="Date.prototype.toGMTString ( )"><span class="secnum">B.2.4.3</span> Date.prototype.toGMTString ( )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-additional-properties-of-the-regexp.prototype-object" title="Additional Properties of the RegExp.prototype Object"><span class="secnum">B.2.5</span> Additional Properties of the RegExp.prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-regexp.prototype.compile" title="RegExp.prototype.compile ( pattern, flags )"><span class="secnum">B.2.5.1</span> RegExp.prototype.compile ( <var>pattern</var>, <var>flags</var> )</a></li></ol></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-other-additional-features" title="Other Additional Features"><span class="secnum">B.3</span> Other Additional Features</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-__proto__-property-names-in-object-initializers" title="__proto__ Property Names in Object Initializers"><span class="secnum">B.3.1</span> __proto__ Property Names in Object Initializers</a></li><li><span class="item-toggle-none"></span><a href="#sec-labelled-function-declarations" title="Labelled Function Declarations"><span class="secnum">B.3.2</span> Labelled Function Declarations</a></li><li><span class="item-toggle">◢</span><a href="#sec-block-level-function-declarations-web-legacy-compatibility-semantics" title="Block-Level Function Declarations Web Legacy Compatibility Semantics"><span class="secnum">B.3.3</span> Block-Level Function Declarations Web Legacy Compatibility Semantics</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-web-compat-functiondeclarationinstantiation" title="Changes to FunctionDeclarationInstantiation"><span class="secnum">B.3.3.1</span> Changes to FunctionDeclarationInstantiation</a></li><li><span class="item-toggle-none"></span><a href="#sec-web-compat-globaldeclarationinstantiation" title="Changes to GlobalDeclarationInstantiation"><span class="secnum">B.3.3.2</span> Changes to GlobalDeclarationInstantiation</a></li><li><span class="item-toggle-none"></span><a href="#sec-web-compat-evaldeclarationinstantiation" title="Changes to EvalDeclarationInstantiation"><span class="secnum">B.3.3.3</span> Changes to EvalDeclarationInstantiation</a></li><li><span class="item-toggle-none"></span><a href="#sec-block-duplicates-allowed-static-semantics" title="Changes to Block Static Semantics: Early Errors"><span class="secnum">B.3.3.4</span> Changes to Block SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-switch-duplicates-allowed-static-semantics" title="Changes to switch Statement Static Semantics: Early Errors"><span class="secnum">B.3.3.5</span> Changes to <code>switch</code> Statement SS: Early Errors</a></li><li><span class="item-toggle-none"></span><a href="#sec-web-compat-blockdeclarationinstantiation" title="Changes to BlockDeclarationInstantiation"><span class="secnum">B.3.3.6</span> Changes to BlockDeclarationInstantiation</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-functiondeclarations-in-ifstatement-statement-clauses" title="FunctionDeclarations in IfStatement Statement Clauses"><span class="secnum">B.3.4</span> FunctionDeclarations in IfStatement Statement Clauses</a></li><li><span class="item-toggle-none"></span><a href="#sec-variablestatements-in-catch-blocks" title="VariableStatements in Catch Blocks"><span class="secnum">B.3.5</span> VariableStatements in Catch Blocks</a></li><li><span class="item-toggle-none"></span><a href="#sec-initializers-in-forin-statement-heads" title="Initializers in ForIn Statement Heads"><span class="secnum">B.3.6</span> Initializers in ForIn Statement Heads</a></li><li><span class="item-toggle">◢</span><a href="#sec-IsHTMLDDA-internal-slot" title="The [[IsHTMLDDA]] Internal Slot"><span class="secnum">B.3.7</span> The [[IsHTMLDDA]] Internal Slot</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-IsHTMLDDA-internal-slot-to-boolean" title="Changes to ToBoolean"><span class="secnum">B.3.7.1</span> Changes to ToBoolean</a></li><li><span class="item-toggle-none"></span><a href="#sec-IsHTMLDDA-internal-slot-aec" title="Changes to Abstract Equality Comparison"><span class="secnum">B.3.7.2</span> Changes to Abstract Equality Comparison</a></li><li><span class="item-toggle-none"></span><a href="#sec-IsHTMLDDA-internal-slot-typeof" title="Changes to the typeof Operator"><span class="secnum">B.3.7.3</span> Changes to the <code>typeof</code> Operator</a></li></ol></li></ol></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-strict-mode-of-ecmascript" title="The Strict Mode of ECMAScript"><span class="secnum">C</span> The Strict Mode of ECMAScript</a></li><li><span class="item-toggle">◢</span><a href="#sec-host-layering-points" title="Host Layering Points"><span class="secnum">D</span> Host Layering Points</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-host-hooks-summary" title="Host Hooks"><span class="secnum">D.1</span> Host Hooks</a></li><li><span class="item-toggle-none"></span><a href="#sec-host-defined-fields-summary" title="Host-defined Fields"><span class="secnum">D.2</span> Host-defined Fields</a></li><li><span class="item-toggle-none"></span><a href="#sec-host-defined-objects-summary" title="Host-defined Objects"><span class="secnum">D.3</span> Host-defined Objects</a></li><li><span class="item-toggle-none"></span><a href="#sec-host-running-jobs" title="Running Jobs"><span class="secnum">D.4</span> Running Jobs</a></li><li><span class="item-toggle-none"></span><a href="#sec-host-internal-methods-of-exotic-objects" title="Internal Methods of Exotic Objects"><span class="secnum">D.5</span> Internal Methods of Exotic Objects</a></li><li><span class="item-toggle-none"></span><a href="#sec-host-built-in-objects-and-methods" title="Built-in Objects and Methods"><span class="secnum">D.6</span> Built-in Objects and Methods</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-corrections-and-clarifications-in-ecmascript-2015-with-possible-compatibility-impact" title="Corrections and Clarifications in ECMAScript 2015 with Possible Compatibility Impact"><span class="secnum">E</span> Corrections and Clarifications in ECMAScript 2015 with Possible Compatibility Impact</a></li><li><span class="item-toggle-none"></span><a href="#sec-additions-and-changes-that-introduce-incompatibilities-with-prior-editions" title="Additions and Changes That Introduce Incompatibilities with Prior Editions"><span class="secnum">F</span> Additions and Changes That Introduce Incompatibilities with Prior Editions</a></li><li><span class="item-toggle-none"></span><a href="#sec-colophon" title="Colophon"><span class="secnum">G</span> Colophon</a></li><li><span class="item-toggle-none"></span><a href="#sec-bibliography" title="Bibliography"><span class="secnum">H</span> Bibliography</a></li><li><span class="item-toggle-none"></span><a href="#sec-copyright-and-software-license" title="Copyright &amp; Software License"><span class="secnum">I</span> Copyright &amp; Software License</a></li></ol></div></div><div id="spec-container"><h1 class="version first">Draft ECMA-262 / October 14, 2020</h1><h1 class="title">ECMAScript® 2021 Language&nbsp;Specification</h1>