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TextureCache
A cache containing the pre-rendered image data of the character set.
Remarks
The texture cache allows us to avoid re-rendering the character set for each frame. And since there are a fixed amount of luminance values, we can pre-render the character set associated with each value.
Additionally, the cache will automatically upgrade the canvas
to a more performant ImageBitmap
if the browser supports it.
-
Array<CanvasLike|ImageBitmap>↳
TextureCache
- [iterator]
- [unscopables]
- at
- concat
- copyWithin
- entries
- every
- fill
- filter
- find
- findIndex
- flat
- flatMap
- forEach
- includes
- indexOf
- join
- keys
- lastIndexOf
- map
- pop
- push
- reduce
- reduceRight
- reverse
- shift
- slice
- some
- sort
- splice
- toLocaleString
- toString
- unshift
- values
- from
- isArray
- of
• new TextureCache(luminanceCharacterMap, textureMetrics, fontFamily, debug?, bitmapsEnabled?)
| Name | Type | Default value |
|---|---|---|
luminanceCharacterMap |
LuminanceCharacterMap |
undefined |
textureMetrics |
TextureMetrics |
undefined |
fontFamily |
string |
undefined |
debug |
boolean |
false |
bitmapsEnabled |
boolean |
supportsCreateImageBitmap |
Array<CanvasLike | ImageBitmap>.constructor
• initializedBitmaps: Promise<void>
A promise that resolves when all of the bitmaps have been initialized.
• length: number
Gets or sets the length of the array. This is a number one higher than the highest index in the array.
Array.length
node_modules/typescript/lib/lib.es5.d.ts:1304
▪ Static Readonly [species]: ArrayConstructor
Array.__@species@1733
node_modules/typescript/lib/lib.es2015.symbol.wellknown.d.ts:314
▸ [iterator](): IterableIterator<CanvasLike | ImageBitmap>
Iterator
IterableIterator<CanvasLike | ImageBitmap>
Array.__@iterator@243
node_modules/typescript/lib/lib.es2015.iterable.d.ts:60
▸ [unscopables](): Object
Returns an object whose properties have the value 'true' when they will be absent when used in a 'with' statement.
Object
| Name | Type |
|---|---|
copyWithin |
boolean |
entries |
boolean |
fill |
boolean |
find |
boolean |
findIndex |
boolean |
keys |
boolean |
values |
boolean |
Array.__@unscopables@1697
node_modules/typescript/lib/lib.es2015.symbol.wellknown.d.ts:99
▸ at(index): undefined | CanvasLike | ImageBitmap
Returns the item located at the specified index.
| Name | Type | Description |
|---|---|---|
index |
number |
The zero-based index of the desired code unit. A negative index will count back from the last item. |
undefined | CanvasLike | ImageBitmap
Array.at
node_modules/typescript/lib/lib.es2022.array.d.ts:26
▸ concat(...items): (CanvasLike | ImageBitmap)[]
Combines two or more arrays. This method returns a new array without modifying any existing arrays.
| Name | Type | Description |
|---|---|---|
...items |
ConcatArray<CanvasLike | ImageBitmap>[] |
Additional arrays and/or items to add to the end of the array. |
(CanvasLike | ImageBitmap)[]
Array.concat
node_modules/typescript/lib/lib.es5.d.ts:1328
▸ concat(...items): (CanvasLike | ImageBitmap)[]
Combines two or more arrays. This method returns a new array without modifying any existing arrays.
| Name | Type | Description |
|---|---|---|
...items |
(CanvasLike | ImageBitmap | ConcatArray<CanvasLike | ImageBitmap>)[] |
Additional arrays and/or items to add to the end of the array. |
(CanvasLike | ImageBitmap)[]
Array.concat
node_modules/typescript/lib/lib.es5.d.ts:1334
▸ copyWithin(target, start, end?): TextureCache
Returns the this object after copying a section of the array identified by start and end to the same array starting at position target
| Name | Type | Description |
|---|---|---|
target |
number |
If target is negative, it is treated as length+target where length is the length of the array. |
start |
number |
If start is negative, it is treated as length+start. If end is negative, it is treated as length+end. |
end? |
number |
If not specified, length of the this object is used as its default value. |
Array.copyWithin
node_modules/typescript/lib/lib.es2015.core.d.ts:64
▸ entries(): IterableIterator<[number, CanvasLike | ImageBitmap]>
Returns an iterable of key, value pairs for every entry in the array
IterableIterator<[number, CanvasLike | ImageBitmap]>
Array.entries
node_modules/typescript/lib/lib.es2015.iterable.d.ts:65
▸ every<S>(predicate, thisArg?): this is S[]
Determines whether all the members of an array satisfy the specified test.
| Name | Type |
|---|---|
S |
extends CanvasLike | ImageBitmap
|
| Name | Type | Description |
|---|---|---|
predicate |
(value: CanvasLike | ImageBitmap, index: number, array: (CanvasLike | ImageBitmap)[]) => value is S |
A function that accepts up to three arguments. The every method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value false, or until the end of the array. |
thisArg? |
any |
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value. |
this is S[]
Array.every
node_modules/typescript/lib/lib.es5.d.ts:1411
▸ every(predicate, thisArg?): boolean
Determines whether all the members of an array satisfy the specified test.
| Name | Type | Description |
|---|---|---|
predicate |
(value: CanvasLike | ImageBitmap, index: number, array: (CanvasLike | ImageBitmap)[]) => unknown
|
A function that accepts up to three arguments. The every method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value false, or until the end of the array. |
thisArg? |
any |
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value. |
boolean
Array.every
node_modules/typescript/lib/lib.es5.d.ts:1420
▸ fill(value, start?, end?): TextureCache
Changes all array elements from start to end index to a static value and returns the modified array
| Name | Type | Description |
|---|---|---|
value |
CanvasLike | ImageBitmap
|
value to fill array section with |
start? |
number |
index to start filling the array at. If start is negative, it is treated as length+start where length is the length of the array. |
end? |
number |
index to stop filling the array at. If end is negative, it is treated as length+end. |
Array.fill
node_modules/typescript/lib/lib.es2015.core.d.ts:53
▸ filter<S>(predicate, thisArg?): S[]
Returns the elements of an array that meet the condition specified in a callback function.
| Name | Type |
|---|---|
S |
extends CanvasLike | ImageBitmap
|
| Name | Type | Description |
|---|---|---|
predicate |
(value: CanvasLike | ImageBitmap, index: number, array: (CanvasLike | ImageBitmap)[]) => value is S |
A function that accepts up to three arguments. The filter method calls the predicate function one time for each element in the array. |
thisArg? |
any |
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value. |
S[]
Array.filter
node_modules/typescript/lib/lib.es5.d.ts:1447
▸ filter(predicate, thisArg?): (CanvasLike | ImageBitmap)[]
Returns the elements of an array that meet the condition specified in a callback function.
| Name | Type | Description |
|---|---|---|
predicate |
(value: CanvasLike | ImageBitmap, index: number, array: (CanvasLike | ImageBitmap)[]) => unknown
|
A function that accepts up to three arguments. The filter method calls the predicate function one time for each element in the array. |
thisArg? |
any |
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value. |
(CanvasLike | ImageBitmap)[]
Array.filter
node_modules/typescript/lib/lib.es5.d.ts:1453
▸ find<S>(predicate, thisArg?): undefined | S
Returns the value of the first element in the array where predicate is true, and undefined otherwise.
| Name | Type |
|---|---|
S |
extends CanvasLike | ImageBitmap
|
| Name | Type | Description |
|---|---|---|
predicate |
(this: void, value: CanvasLike | ImageBitmap, index: number, obj: (CanvasLike | ImageBitmap)[]) => value is S |
find calls predicate once for each element of the array, in ascending order, until it finds one where predicate returns true. If such an element is found, find immediately returns that element value. Otherwise, find returns undefined. |
thisArg? |
any |
If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead. |
undefined | S
Array.find
node_modules/typescript/lib/lib.es2015.core.d.ts:31
▸ find(predicate, thisArg?): undefined | CanvasLike | ImageBitmap
| Name | Type |
|---|---|
predicate |
(value: CanvasLike | ImageBitmap, index: number, obj: (CanvasLike | ImageBitmap)[]) => unknown
|
thisArg? |
any |
undefined | CanvasLike | ImageBitmap
Array.find
node_modules/typescript/lib/lib.es2015.core.d.ts:32
▸ findIndex(predicate, thisArg?): number
Returns the index of the first element in the array where predicate is true, and -1 otherwise.
| Name | Type | Description |
|---|---|---|
predicate |
(value: CanvasLike | ImageBitmap, index: number, obj: (CanvasLike | ImageBitmap)[]) => unknown
|
find calls predicate once for each element of the array, in ascending order, until it finds one where predicate returns true. If such an element is found, findIndex immediately returns that element index. Otherwise, findIndex returns -1. |
thisArg? |
any |
If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead. |
number
Array.findIndex
node_modules/typescript/lib/lib.es2015.core.d.ts:43
▸ flat<A, D>(this, depth?): FlatArray<A, D>[]
Returns a new array with all sub-array elements concatenated into it recursively up to the specified depth.
| Name | Type |
|---|---|
A |
A |
D |
extends number = 1
|
| Name | Type | Description |
|---|---|---|
this |
A |
- |
depth? |
D |
The maximum recursion depth |
FlatArray<A, D>[]
Array.flat
node_modules/typescript/lib/lib.es2019.array.d.ts:81
▸ flatMap<U, This>(callback, thisArg?): U[]
Calls a defined callback function on each element of an array. Then, flattens the result into a new array. This is identical to a map followed by flat with depth 1.
| Name | Type |
|---|---|
U |
U |
This |
undefined |
| Name | Type | Description |
|---|---|---|
callback |
(this: This, value: CanvasLike | ImageBitmap, index: number, array: (CanvasLike | ImageBitmap)[]) => U | readonly U[] |
A function that accepts up to three arguments. The flatMap method calls the callback function one time for each element in the array. |
thisArg? |
This |
An object to which the this keyword can refer in the callback function. If thisArg is omitted, undefined is used as the this value. |
U[]
Array.flatMap
node_modules/typescript/lib/lib.es2019.array.d.ts:70
▸ forEach(callbackfn, thisArg?): void
Performs the specified action for each element in an array.
| Name | Type | Description |
|---|---|---|
callbackfn |
(value: CanvasLike | ImageBitmap, index: number, array: (CanvasLike | ImageBitmap)[]) => void
|
A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array. |
thisArg? |
any |
An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value. |
void
Array.forEach
node_modules/typescript/lib/lib.es5.d.ts:1435
▸ includes(searchElement, fromIndex?): boolean
Determines whether an array includes a certain element, returning true or false as appropriate.
| Name | Type | Description |
|---|---|---|
searchElement |
CanvasLike | ImageBitmap
|
The element to search for. |
fromIndex? |
number |
The position in this array at which to begin searching for searchElement. |
boolean
Array.includes
node_modules/typescript/lib/lib.es2016.array.include.d.ts:27
▸ indexOf(searchElement, fromIndex?): number
Returns the index of the first occurrence of a value in an array, or -1 if it is not present.
| Name | Type | Description |
|---|---|---|
searchElement |
CanvasLike | ImageBitmap
|
The value to locate in the array. |
fromIndex? |
number |
The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0. |
number
Array.indexOf
node_modules/typescript/lib/lib.es5.d.ts:1396
▸ join(separator?): string
Adds all the elements of an array into a string, separated by the specified separator string.
| Name | Type | Description |
|---|---|---|
separator? |
string |
A string used to separate one element of the array from the next in the resulting string. If omitted, the array elements are separated with a comma. |
string
Array.join
node_modules/typescript/lib/lib.es5.d.ts:1339
▸ keys(): IterableIterator<number>
Returns an iterable of keys in the array
IterableIterator<number>
Array.keys
node_modules/typescript/lib/lib.es2015.iterable.d.ts:70
▸ lastIndexOf(searchElement, fromIndex?): number
Returns the index of the last occurrence of a specified value in an array, or -1 if it is not present.
| Name | Type | Description |
|---|---|---|
searchElement |
CanvasLike | ImageBitmap
|
The value to locate in the array. |
fromIndex? |
number |
The array index at which to begin searching backward. If fromIndex is omitted, the search starts at the last index in the array. |
number
Array.lastIndexOf
node_modules/typescript/lib/lib.es5.d.ts:1402
▸ map<U>(callbackfn, thisArg?): U[]
Calls a defined callback function on each element of an array, and returns an array that contains the results.
| Name |
|---|
U |
| Name | Type | Description |
|---|---|---|
callbackfn |
(value: CanvasLike | ImageBitmap, index: number, array: (CanvasLike | ImageBitmap)[]) => U
|
A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array. |
thisArg? |
any |
An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value. |
U[]
Array.map
node_modules/typescript/lib/lib.es5.d.ts:1441
▸ pop(): undefined | CanvasLike | ImageBitmap
Removes the last element from an array and returns it. If the array is empty, undefined is returned and the array is not modified.
undefined | CanvasLike | ImageBitmap
Array.pop
node_modules/typescript/lib/lib.es5.d.ts:1317
▸ push(...items): number
Appends new elements to the end of an array, and returns the new length of the array.
| Name | Type | Description |
|---|---|---|
...items |
(CanvasLike | ImageBitmap)[] |
New elements to add to the array. |
number
Array.push
node_modules/typescript/lib/lib.es5.d.ts:1322
▸ reduce(callbackfn): CanvasLike | ImageBitmap
Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
| Name | Type | Description |
|---|---|---|
callbackfn |
(previousValue: CanvasLike | ImageBitmap, currentValue: CanvasLike | ImageBitmap, currentIndex: number, array: (CanvasLike | ImageBitmap)[]) => CanvasLike | ImageBitmap
|
A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array. |
CanvasLike | ImageBitmap
Array.reduce
node_modules/typescript/lib/lib.es5.d.ts:1459
▸ reduce(callbackfn, initialValue): CanvasLike | ImageBitmap
| Name | Type |
|---|---|
callbackfn |
(previousValue: CanvasLike | ImageBitmap, currentValue: CanvasLike | ImageBitmap, currentIndex: number, array: (CanvasLike | ImageBitmap)[]) => CanvasLike | ImageBitmap
|
initialValue |
CanvasLike | ImageBitmap
|
CanvasLike | ImageBitmap
Array.reduce
node_modules/typescript/lib/lib.es5.d.ts:1460
▸ reduce<U>(callbackfn, initialValue): U
Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
| Name |
|---|
U |
| Name | Type | Description |
|---|---|---|
callbackfn |
(previousValue: U, currentValue: CanvasLike | ImageBitmap, currentIndex: number, array: (CanvasLike | ImageBitmap)[]) => U
|
A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array. |
initialValue |
U |
If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value. |
U
Array.reduce
node_modules/typescript/lib/lib.es5.d.ts:1466
▸ reduceRight(callbackfn): CanvasLike | ImageBitmap
Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
| Name | Type | Description |
|---|---|---|
callbackfn |
(previousValue: CanvasLike | ImageBitmap, currentValue: CanvasLike | ImageBitmap, currentIndex: number, array: (CanvasLike | ImageBitmap)[]) => CanvasLike | ImageBitmap
|
A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array. |
CanvasLike | ImageBitmap
Array.reduceRight
node_modules/typescript/lib/lib.es5.d.ts:1472
▸ reduceRight(callbackfn, initialValue): CanvasLike | ImageBitmap
| Name | Type |
|---|---|
callbackfn |
(previousValue: CanvasLike | ImageBitmap, currentValue: CanvasLike | ImageBitmap, currentIndex: number, array: (CanvasLike | ImageBitmap)[]) => CanvasLike | ImageBitmap
|
initialValue |
CanvasLike | ImageBitmap
|
CanvasLike | ImageBitmap
Array.reduceRight
node_modules/typescript/lib/lib.es5.d.ts:1473
▸ reduceRight<U>(callbackfn, initialValue): U
Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
| Name |
|---|
U |
| Name | Type | Description |
|---|---|---|
callbackfn |
(previousValue: U, currentValue: CanvasLike | ImageBitmap, currentIndex: number, array: (CanvasLike | ImageBitmap)[]) => U
|
A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array. |
initialValue |
U |
If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value. |
U
Array.reduceRight
node_modules/typescript/lib/lib.es5.d.ts:1479
▸ reverse(): (CanvasLike | ImageBitmap)[]
Reverses the elements in an array in place. This method mutates the array and returns a reference to the same array.
(CanvasLike | ImageBitmap)[]
Array.reverse
node_modules/typescript/lib/lib.es5.d.ts:1344
▸ shift(): undefined | CanvasLike | ImageBitmap
Removes the first element from an array and returns it. If the array is empty, undefined is returned and the array is not modified.
undefined | CanvasLike | ImageBitmap
Array.shift
node_modules/typescript/lib/lib.es5.d.ts:1349
▸ slice(start?, end?): (CanvasLike | ImageBitmap)[]
Returns a copy of a section of an array. For both start and end, a negative index can be used to indicate an offset from the end of the array. For example, -2 refers to the second to last element of the array.
| Name | Type | Description |
|---|---|---|
start? |
number |
The beginning index of the specified portion of the array. If start is undefined, then the slice begins at index 0. |
end? |
number |
The end index of the specified portion of the array. This is exclusive of the element at the index 'end'. If end is undefined, then the slice extends to the end of the array. |
(CanvasLike | ImageBitmap)[]
Array.slice
node_modules/typescript/lib/lib.es5.d.ts:1359
▸ some(predicate, thisArg?): boolean
Determines whether the specified callback function returns true for any element of an array.
| Name | Type | Description |
|---|---|---|
predicate |
(value: CanvasLike | ImageBitmap, index: number, array: (CanvasLike | ImageBitmap)[]) => unknown
|
A function that accepts up to three arguments. The some method calls the predicate function for each element in the array until the predicate returns a value which is coercible to the Boolean value true, or until the end of the array. |
thisArg? |
any |
An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value. |
boolean
Array.some
node_modules/typescript/lib/lib.es5.d.ts:1429
▸ sort(compareFn?): TextureCache
Sorts an array in place. This method mutates the array and returns a reference to the same array.
| Name | Type | Description |
|---|---|---|
compareFn? |
(a: CanvasLike | ImageBitmap, b: CanvasLike | ImageBitmap) => number
|
Function used to determine the order of the elements. It is expected to return a negative value if the first argument is less than the second argument, zero if they're equal, and a positive value otherwise. If omitted, the elements are sorted in ascending, ASCII character order. ts [11,2,22,1].sort((a, b) => a - b)
|
Array.sort
node_modules/typescript/lib/lib.es5.d.ts:1370
▸ splice(start, deleteCount?): (CanvasLike | ImageBitmap)[]
Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
| Name | Type | Description |
|---|---|---|
start |
number |
The zero-based location in the array from which to start removing elements. |
deleteCount? |
number |
The number of elements to remove. |
(CanvasLike | ImageBitmap)[]
An array containing the elements that were deleted.
Array.splice
node_modules/typescript/lib/lib.es5.d.ts:1377
▸ splice(start, deleteCount, ...items): (CanvasLike | ImageBitmap)[]
Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
| Name | Type | Description |
|---|---|---|
start |
number |
The zero-based location in the array from which to start removing elements. |
deleteCount |
number |
The number of elements to remove. |
...items |
(CanvasLike | ImageBitmap)[] |
Elements to insert into the array in place of the deleted elements. |
(CanvasLike | ImageBitmap)[]
An array containing the elements that were deleted.
Array.splice
node_modules/typescript/lib/lib.es5.d.ts:1385
▸ toLocaleString(): string
Returns a string representation of an array. The elements are converted to string using their toLocaleString methods.
string
Array.toLocaleString
node_modules/typescript/lib/lib.es5.d.ts:1312
▸ toString(): string
Returns a string representation of an array.
string
Array.toString
node_modules/typescript/lib/lib.es5.d.ts:1308
▸ unshift(...items): number
Inserts new elements at the start of an array, and returns the new length of the array.
| Name | Type | Description |
|---|---|---|
...items |
(CanvasLike | ImageBitmap)[] |
Elements to insert at the start of the array. |
number
Array.unshift
node_modules/typescript/lib/lib.es5.d.ts:1390
▸ values(): IterableIterator<CanvasLike | ImageBitmap>
Returns an iterable of values in the array
IterableIterator<CanvasLike | ImageBitmap>
Array.values
node_modules/typescript/lib/lib.es2015.iterable.d.ts:75
▸ Static from<T>(arrayLike): T[]
Creates an array from an array-like object.
| Name |
|---|
T |
| Name | Type | Description |
|---|---|---|
arrayLike |
ArrayLike<T> |
An array-like object to convert to an array. |
T[]
Array.from
node_modules/typescript/lib/lib.es2015.core.d.ts:72
▸ Static from<T, U>(arrayLike, mapfn, thisArg?): U[]
Creates an array from an iterable object.
| Name |
|---|
T |
U |
| Name | Type | Description |
|---|---|---|
arrayLike |
ArrayLike<T> |
An array-like object to convert to an array. |
mapfn |
(v: T, k: number) => U
|
A mapping function to call on every element of the array. |
thisArg? |
any |
Value of 'this' used to invoke the mapfn. |
U[]
Array.from
node_modules/typescript/lib/lib.es2015.core.d.ts:80
▸ Static from<T>(iterable): T[]
Creates an array from an iterable object.
| Name |
|---|
T |
| Name | Type | Description |
|---|---|---|
iterable |
Iterable<T> | ArrayLike<T> |
An iterable object to convert to an array. |
T[]
Array.from
node_modules/typescript/lib/lib.es2015.iterable.d.ts:83
▸ Static from<T, U>(iterable, mapfn, thisArg?): U[]
Creates an array from an iterable object.
| Name |
|---|
T |
U |
| Name | Type | Description |
|---|---|---|
iterable |
Iterable<T> | ArrayLike<T> |
An iterable object to convert to an array. |
mapfn |
(v: T, k: number) => U
|
A mapping function to call on every element of the array. |
thisArg? |
any |
Value of 'this' used to invoke the mapfn. |
U[]
Array.from
node_modules/typescript/lib/lib.es2015.iterable.d.ts:91
▸ Static isArray(arg): arg is any[]
| Name | Type |
|---|---|
arg |
any |
arg is any[]
Array.isArray
node_modules/typescript/lib/lib.es5.d.ts:1491
▸ Static of<T>(...items): T[]
Returns a new array from a set of elements.
| Name |
|---|
T |
| Name | Type | Description |
|---|---|---|
...items |
T[] |
A set of elements to include in the new array object. |
T[]
Array.of
node_modules/typescript/lib/lib.es2015.core.d.ts:86