.eslintrc.js

module.exports = {
  env: { es6: true, node: true },
  extends: ['plugin:jest/recommended', 'plugin:prettier/recommended'],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: 'tsconfig.eslint.json',
    sourceType: 'module',
  },
  plugins: ['@typescript-eslint', 'eslint-plugin-import', 'eslint-plugin-jsdoc', 'eslint-plugin-prefer-arrow'],
  rules: {
    '@typescript-eslint/adjacent-overload-signatures': 'error',
    '@typescript-eslint/array-type': [
      'error',
      {
        default: 'array',
      },
    ],
    '@typescript-eslint/dot-notation': 'error',
    '@typescript-eslint/member-delimiter-style': [
      'error',
      {
        multiline: {
          delimiter: 'semi',
          requireLast: true,
        },
        singleline: {
          delimiter: 'semi',
          requireLast: false,
        },
      },
    ],
    '@typescript-eslint/naming-convention': [
      'error',
      {
        selector: 'default',
        format: ['camelCase'],
        leadingUnderscore: 'allow',
        trailingUnderscore: 'forbid',
      },
      {
        selector: 'variable',
        format: ['camelCase', 'UPPER_CASE'],
        leadingUnderscore: 'allow',
        trailingUnderscore: 'forbid',
      },
      {
        selector: 'enumMember',
        format: ['camelCase', 'UPPER_CASE'],
      },
      {
        selector: 'typeLike',
        format: ['PascalCase'],
      },
    ],
    '@typescript-eslint/no-empty-function': 'error',
    '@typescript-eslint/no-empty-interface': 'error',
    '@typescript-eslint/no-explicit-any': 'error',
    '@typescript-eslint/no-floating-promises': 'error',
    '@typescript-eslint/no-for-in-array': 'error',
    '@typescript-eslint/no-misused-new': 'error',
    '@typescript-eslint/no-namespace': 'error',
    '@typescript-eslint/no-parameter-properties': 'off',
    '@typescript-eslint/no-this-alias': 'error',
    '@typescript-eslint/no-unnecessary-condition': 'error',
    '@typescript-eslint/no-unnecessary-qualifier': 'error',
    '@typescript-eslint/no-unnecessary-type-arguments': 'error',
    '@typescript-eslint/no-unnecessary-type-assertion': 'error',
    '@typescript-eslint/no-unused-expressions': 'error',
    '@typescript-eslint/no-use-before-define': 'off',
    '@typescript-eslint/no-var-requires': 'error',
    '@typescript-eslint/prefer-for-of': 'error',
    '@typescript-eslint/prefer-function-type': 'error',
    '@typescript-eslint/prefer-namespace-keyword': 'error',
    '@typescript-eslint/prefer-readonly': 'error',
    '@typescript-eslint/promise-function-async': 'error',
    '@typescript-eslint/quotes': ['error', 'single', { avoidEscape: true, allowTemplateLiterals: true }],
    '@typescript-eslint/restrict-plus-operands': 'error',
    '@typescript-eslint/semi': 'error',
    '@typescript-eslint/strict-boolean-expressions': [
      'error',
      {
        allowNullableObject: true,
        allowNullableBoolean: false,
        allowNullableString: false,
      },
    ],
    '@typescript-eslint/triple-slash-reference': [
      'error',
      {
        path: 'always',
        types: 'prefer-import',
        lib: 'always',
      },
    ],
    '@typescript-eslint/explicit-function-return-type': [
      'error',
      {
        allowExpressions: true,
        allowTypedFunctionExpressions: true,
        allowHigherOrderFunctions: true,
        allowDirectConstAssertionInArrowFunctions: false,
        allowConciseArrowFunctionExpressionsStartingWithVoid: false,
      },
    ],
    '@typescript-eslint/type-annotation-spacing': 'error',
    '@typescript-eslint/unified-signatures': 'error',
    'arrow-parens': ['error', 'always'],
    'brace-style': 'error',
    'comma-dangle': ['error', 'always-multiline'],
    complexity: 'off',
    'constructor-super': 'off',
    'eol-last': 'error',
    eqeqeq: ['error', 'smart'],
    'guard-for-in': 'error',
    'id-blacklist': [
      'error',
      'any',
      'Number',
      'number',
      'String',
      'string',
      'Boolean',
      'boolean',
      'Undefined',
      'undefined',
    ],
    'id-match': 'error',
    'import/no-cycle': 'error',
    'import/no-deprecated': 'error',
    'import/no-extraneous-dependencies': 'off',
    'import/no-internal-modules': ['error', { allow: ['**/*', '**/src/*'] }],
    'import/no-restricted-paths': ['error', { zones: [{ target: './src', from: './test' }] }],
    'import/order': [
      'error',
      {
        groups: ['builtin', 'external', 'object'],
      },
    ],
    'jest/expect-expect': [
      'error',
      {
        assertFunctionNames: ['expect*', 'verify*'],
      },
    ],
    'jsdoc/check-alignment': 'error',
    'jsdoc/check-indentation': 'error',
    'jsdoc/newline-after-description': 'error',
    'linebreak-style': 'error',
    'max-classes-per-file': 'off',
    'max-len': 'off',
    'new-parens': 'off',
    'newline-per-chained-call': 'off',
    'no-bitwise': 'error',
    'no-caller': 'error',
    'no-cond-assign': 'error',
    'no-console': 'error',
    'no-debugger': 'error',
    'no-duplicate-case': 'error',
    'no-duplicate-imports': 'error',
    'no-empty': 'error',
    'no-eval': 'error',
    'no-extra-bind': 'error',
    'no-extra-semi': 'error',
    'no-fallthrough': 'error',
    'no-invalid-this': 'off',
    'no-irregular-whitespace': 'error',
    'no-multiple-empty-lines': 'error',
    'no-new-func': 'error',
    'no-new-wrappers': 'error',
    'no-redeclare': 'error',
    'no-return-await': 'error',
    'no-sequences': 'error',
    'no-sparse-arrays': 'error',
    'no-template-curly-in-string': 'error',
    'no-throw-literal': 'error',
    'no-trailing-spaces': 'error',
    'no-undef-init': 'error',
    'no-unsafe-finally': 'error',
    'no-unused-labels': 'error',
    'no-var': 'error',
    'no-void': 'error',
    'object-shorthand': 'error',
    'one-var': ['error', 'never'],
    'prefer-const': 'error',
    'quote-props': ['error', 'as-needed'],
    radix: 'error',
    semi: 'off', // use @typescript-eslint/semi instead
    'sort-imports': ['error', { allowSeparatedGroups: true, ignoreDeclarationSort: true }],
    'space-before-function-paren': 'off',
    'space-in-parens': ['error', 'never'],
    'spaced-comment': [
      'error',
      'always',
      {
        markers: ['/'],
      },
    ],
    'use-isnan': 'error',
    'valid-typeof': 'error',
  },
  ignorePatterns: ['dist', 'tsconfig.json', 'tsconfig.eslint.json', 'package.json', 'package-lock.json', 'ort'],
  settings: {
    'import/resolver': {
      node: {
        extensions: ['.ts'],
      },
    },
  },
};