{
  env: {
    es6: true
  },
  parserOptions: {
    ecmaVersion: 6,
    sourceType: 'module',
    ecmaFeatures: {
      generators: false,
      objectLiteralDuplicateProperties: false
    }
  },

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

    # require parens in arrow function arguments
    # http://eslint.org/docs/rules/arrow-parens
    'arrow-parens': ['error', 'as-needed', {
      requireForBlockBody: true,
    }],

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

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

    # enforce the spacing around the * in generator functions
    # http://eslint.org/docs/rules/generator-star-spacing
    'generator-star-spacing': ['error', { before: false, after: true }],

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

    # disallow arrow functions where they could be confused with comparisons
    # http://eslint.org/docs/rules/no-confusing-arrow
    'no-confusing-arrow': ['error', {
      allowParens: true,
    }],

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

    # disallow duplicate class members
    # http://eslint.org/docs/rules/no-dupe-class-members
    'no-dupe-class-members': 'error',

    # disallow importing from the same path more than once
    # http://eslint.org/docs/rules/no-duplicate-imports
    'no-duplicate-imports': 'error',

    # disallow symbol constructor
    # http://eslint.org/docs/rules/no-new-symbol
    'no-new-symbol': 'error',

    # disallow specific imports
    # http://eslint.org/docs/rules/no-restricted-imports
    'no-restricted-imports': 'off',

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

    # disallow useless computed property keys
    # http://eslint.org/docs/rules/no-useless-computed-key
    'no-useless-computed-key': 'error',

    # disallow unnecessary constructor
    # http://eslint.org/docs/rules/no-useless-constructor
    'no-useless-constructor': 'error',

    # disallow renaming import, export, and destructured assignments to the same name
    # http://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
    # http://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,
    }],

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

    # use rest parameters instead of arguments
    # http://eslint.org/docs/rules/prefer-rest-params
    'prefer-rest-params': 'error',

    # suggest using the spread operator instead of .apply()
    # http://eslint.org/docs/rules/prefer-spread
    'prefer-spread': 'error',

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

    # disallow generator functions that do not have yield
    # http://eslint.org/docs/rules/require-yield
    'require-yield': 'error',

    # enforce spacing between object rest-spread
    # http://eslint.org/docs/rules/rest-spread-spacing
    'rest-spread-spacing': ['error', 'never'],

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

    # require a Symbol description
    # http://eslint.org/docs/rules/symbol-description
    'symbol-description': 'error',

    # enforce usage of spacing in template strings
    # http://eslint.org/docs/rules/template-curly-spacing
    'template-curly-spacing': 'error',

    # enforce spacing around the * in yield* expressions
    # http://eslint.org/docs/rules/yield-star-spacing
    'yield-star-spacing': ['error', 'after']
  }
}