@wakamsha/eslint-config/rules/es6.js

wakamsha's ESLint rules as an extensible shared config.

// @ts-check
/**
 * @file
 * Copyright (c) 2012 Airbnb
 *
 * Licensed under the MIT License: https://github.com/airbnb/javascript/blob/master/LICENSE.md
 *
 * This file is a copy of https://github.com/airbnb/javascript/blob/master/packages/eslint-config-airbnb-base/rules/es6.js
 * with the following modifications:
 *
 * - Specify `requireReturnForObjectLiteral` option for `arrow-body-style` rule to `true` because of readability.
 */

export default {
  rules: {
    // enforces no braces where they can be omitted
    // https://eslint.org/docs/rules/arrow-body-style
    'arrow-body-style': [
      'error',
      'as-needed',
      {
        requireReturnForObjectLiteral: false,
      },
    ],

    // require space before/after arrow function's arrow
    // https://eslint.org/docs/rules/arrow-spacing
    'arrow-spacing': ['error', { before: true, after: true }],

    // verify super() callings in constructors
    'constructor-super': 'error',

    // disallow modifying variables of class declarations
    // https://eslint.org/docs/rules/no-class-assign
    'no-class-assign': 'error',

    // disallow modifying variables that are declared using const
    'no-const-assign': ['error'],

    // disallow duplicate class members
    // https://eslint.org/docs/rules/no-dupe-class-members
    'no-dupe-class-members': ['error'],

    // disallow importing from the same path more than once
    // https://eslint.org/docs/rules/no-duplicate-imports
    // replaced by https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-duplicates.md
    'no-duplicate-imports': ['off'],

    // disallow symbol constructor
    // https://eslint.org/docs/rules/no-new-symbol
    'no-new-symbol': ['error'],

    // Disallow specified names in exports
    // https://eslint.org/docs/rules/no-restricted-exports
    'no-restricted-exports': [
      'error',
      {
        restrictedNamedExports: [
          'default', // use `export default` to provide a default export
          'then', // this will cause tons of confusion when your module is dynamically `import()`ed, and will break in most node ESM versions
        ],
      },
    ],

    // disallow specific imports
    // https://eslint.org/docs/rules/no-restricted-imports
    'no-restricted-imports': [
      'error',
      {
        paths: [
          // {
          //   name: 'path-to-foo',
          //   importNames: ['module-name'],
          //   message: 'Use `module-name` in `path-to-bar` instead.',
          // },
        ],
      },
    ],

    // disallow to use this/super before super() calling in constructors.
    // https://eslint.org/docs/rules/no-this-before-super
    'no-this-before-super': 'error',

    // disallow useless computed property keys
    // https://eslint.org/docs/rules/no-useless-computed-key
    'no-useless-computed-key': ['error'],

    // disallow unnecessary constructor
    // https://eslint.org/docs/rules/no-useless-constructor
    'no-useless-constructor': ['error'],

    // disallow renaming import, export, and destructured assignments to the same name
    // https://eslint.org/docs/rules/no-useless-rename
    'no-useless-rename': [
      'error',
      {
        ignoreDestructuring: false,
        ignoreImport: false,
        ignoreExport: false,
      },
    ],

    // require let or const instead of var
    'no-var': ['error'],

    // require method and property shorthand syntax for object literals
    // https://eslint.org/docs/rules/object-shorthand
    'object-shorthand': [
      'error',
      'always',
      {
        ignoreConstructors: false,
        avoidQuotes: true,
      },
    ],

    // suggest using arrow functions as callbacks
    'prefer-arrow-callback': [
      'error',
      {
        allowNamedFunctions: false,
        allowUnboundThis: true,
      },
    ],

    // suggest using of const declaration for variables that are never modified after declared
    'prefer-const': [
      'error',
      {
        destructuring: 'any',
        ignoreReadBeforeAssign: true,
      },
    ],

    // Prefer destructuring from arrays and objects
    // https://eslint.org/docs/rules/prefer-destructuring
    'prefer-destructuring': [
      'error',
      {
        VariableDeclarator: {
          array: false,
          object: true,
        },
        AssignmentExpression: {
          array: true,
          object: false,
        },
      },
      {
        enforceForRenamedProperties: false,
      },
    ],

    // disallow parseInt() in favor of binary, octal, and hexadecimal literals
    // https://eslint.org/docs/rules/prefer-numeric-literals
    'prefer-numeric-literals': ['error'],

    // use rest parameters instead of arguments
    // https://eslint.org/docs/rules/prefer-rest-params
    'prefer-rest-params': ['error'],

    // suggest using the spread syntax instead of .apply()
    // https://eslint.org/docs/rules/prefer-spread
    'prefer-spread': ['error'],

    // suggest using template literals instead of string concatenation
    // https://eslint.org/docs/rules/prefer-template
    'prefer-template': ['error'],

    // import sorting
    // https://eslint.org/docs/rules/sort-imports
    'sort-imports': [
      'off',
      {
        ignoreCase: false,
        ignoreDeclarationSort: false,
        ignoreMemberSort: false,
        memberSyntaxSortOrder: ['none', 'all', 'multiple', 'single'],
      },
    ],

    // require a Symbol description
    // https://eslint.org/docs/rules/symbol-description
    'symbol-description': ['error'],
  },
};