es6.js

/**
 * These rules relate to ES6, also known as ES2015
 */
module.exports = {
  rules: {
    // require braces in arrow function body
    'arrow-body-style': ['error', 'as-needed', {
      requireReturnForObjectLiteral: false,
    }],

    // require parens in arrow function arguments
    'arrow-parens': ['error', 'as-needed'],

    // require space before/after arrow function’s arrow
    'arrow-spacing': 'error',

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

    // enforce spacing around the * in generator functions
    'generator-star-spacing': ['error', { before: false, after: true }],

    // disallow modifying variables of class declarations
    'no-class-assign': 'error',

    // disallow arrow functions where they could be confused with comparisons
    'no-confusing-arrow': ['error', {
      allowParens: true,
    }],

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

    // disallow duplicate name in class members
    'no-dupe-class-members': 'error',

    // disallow duplicate imports
    'no-duplicate-imports': 'error',

    // disallow symbol constructor
    'no-new-symbol': 'error',

    // disallow specific imports
    'no-restricted-imports': 'off',

    // disallow use of this/super before calling super() in constructors.
    'no-this-before-super': 'error',

    // disallow unnecessary computed property keys on objects
    'no-useless-computed-key': 'error',

    // disallow unnecessary constructor
    'no-useless-constructor': 'error',

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

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

    // require object literal shorthand syntax
    'object-shorthand': ['error', 'always', {
      ignoreConstructors: false,
      avoidQuotes: true,
    }],

    // suggest using arrow functions as callbacks
    'prefer-arrow-callback': 'off',

    // 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
    'prefer-destructuring': 'off',

    // disallow parseInt() in favor of binary, octal, and hexadecimal literals
    'prefer-numeric-literals': 'error',

    // suggest using the rest parameters instead of arguments
    'prefer-rest-params': 'error',

    // suggest using the spread operator instead of .apply()
    'prefer-spread': 'warn',

    // suggest using template literals instead of string concatenation
    'prefer-template': 'error',

    // disallow generator functions that do not have yield
    'require-yield': 'error',

    // enforce spacing between rest and spread operators and their expressions
    'rest-spread-spacing': ['error', 'never'],

    // import sorting
    'sort-imports': 'off',

    // require symbol description
    'symbol-description': 'error',

    // enforce usage of spacing in template strings
    'template-curly-spacing': 'error',

    // enforce spacing around the * in yield* expressions
    'yield-star-spacing': ['error', 'after']
  },
  parserOptions: {
    ecmaVersion: 8,
    sourceType: 'module',
    // ecmaFeatures: {
    //   objectLiteralDuplicateProperties: false,
    //   generators: false
    // }
  }
}