index.js

/**
 * Copyright 2016 Google Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

'use strict';

module.exports = {
	parserOptions: {
		ecmaVersion: 8,
	},
	rules: {
		// The rules below are listed in the order they appear on the eslint
		// rules page. All rules are listed to make it easier to keep in sync
		// as new ESLint rules are added.
		// http://eslint.org/docs/rules/
		// - Rules in the `eslint:recommended` ruleset that aren't specifically
		//   mentioned by the google styleguide are listed but commented out (so
		//   they don't override a base ruleset).
		// - Rules that are recommended but contradict the Google styleguide
		//   are explicitely set to the Google styleguide value.

		// Possible Errors
		// http://eslint.org/docs/rules/#possible-errors
		// ---------------------------------------------
		// 'for-direction': 'off',
		// 'no-await-in-loop': 'off',
		'no-compare-neg-zero': 'error', // eslint:recommended
		'no-cond-assign': 'off', // eslint:recommended
		'no-console': 'error', // eslint:recommended
		'no-constant-condition': 'error', // eslint:recommended
		'no-control-regex': 'error', // eslint:recommended
		'no-debugger': 'error', // eslint:recommended
		'no-dupe-args': 'error', // eslint:recommended
		'no-dupe-keys': 'error', // eslint:recommended
		'no-duplicate-case': 'error', // eslint:recommended
		'no-empty': 'error', // eslint:recommended
		'no-empty-character-class': 'error', // eslint:recommended
		'no-ex-assign': 'error', // eslint:recommended
		'no-extra-boolean-cast': 'error', // eslint:recommended
		// 'no-extra-parens': 'off',
		'no-extra-semi': 'error', // eslint:recommended
		'no-func-assign': 'error', // eslint:recommended
		'no-inner-declarations': 'error', // eslint:recommended
		'no-invalid-regexp': 'error', // eslint:recommended
		'no-irregular-whitespace': 'error', // eslint:recommended
		'no-obj-calls': 'error', // eslint:recommended
		// 'no-prototype-builtins': 'off',
		'no-regex-spaces': 'error', // eslint:recommended
		'no-sparse-arrays': 'error', // eslint:recommended
		// 'no-template-curly-in-string': 'off',
		'no-unexpected-multiline': 'error', // eslint:recommended
		'no-unreachable': 'error', // eslint:recommended
		'no-unsafe-finally': 'error', // eslint:recommended
		// 'no-unsafe-negation': 'off',
		// 'use-isnan': 'error', // eslint:recommended
		'valid-jsdoc': [
			'error',
			{
				requireParamDescription: false,
				requireReturnDescription: false,
				requireReturn: false,
				prefer: {returns: 'return'},
			},
		],
		'valid-typeof': 'error', // eslint:recommended

		// Best Practices
		// http://eslint.org/docs/rules/#best-practices
		// --------------------------------------------

		// 'accessor-pairs': 'off',
		// 'array-callback-return': 'off',
		// 'block-scoped-var': 'off',
		// 'class-methods-use-this': 'off',
		// 'complexity': 'off',
		// 'consistent-return': 0
		curly: ['error', 'multi-line'],
		// 'default-case': 'off',
		// 'dot-location': 'off',
		// 'dot-notation': 'off',
		// 'eqeqeq': 'off',
		'guard-for-in': 'error',
		// 'no-alert': 'off',
		'no-caller': 'error',
		// 'no-case-declarations': 'error', // eslint:recommended
		// 'no-div-regex': 'off',
		// 'no-else-return': 'off',
		// 'no-empty-function': 'off',
		// 'no-empty-pattern': 'error', // eslint:recommended
		// 'no-eq-null': 'off',
		// 'no-eval': 'off',
		'no-extend-native': 'error',
		'no-extra-bind': 'error',
		// 'no-extra-label': 'off',
		// 'no-fallthrough': 'error', // eslint:recommended
		// 'no-floating-decimal': 'off',
		// 'no-global-assign': 'off',
		// 'no-implicit-coercion': 'off',
		// 'no-implicit-globals': 'off',
		// 'no-implied-eval': 'off',
		'no-invalid-this': 'error',
		// 'no-iterator': 'off',
		// 'no-labels': 'off',
		// 'no-lone-blocks': 'off',
		// 'no-loop-func': 'off',
		// 'no-magic-numbers': 'off',
		'no-multi-spaces': 'error',
		'no-multi-str': 'error',
		// 'no-new': 'off',
		// 'no-new-func': 'off',
		'no-new-wrappers': 'error',
		// 'no-octal': 'error', // eslint:recommended
		// 'no-octal-escape': 'off',
		// 'no-param-reassign': 'off',
		// 'no-proto': 'off',
		'no-redeclare': 'error', // eslint:recommended
		// 'no-restricted-properties': 'off',
		// 'no-return-assign': 'off',
		// 'no-script-url': 'off',
		// 'no-self-assign': 'error', // eslint:recommended
		// 'no-self-compare': 'off',
		// 'no-sequences': 'off',
		'no-throw-literal': 'error', // eslint:recommended
		// 'no-unmodified-loop-condition': 'off',
		// 'no-unused-expressions': 'off',
		// 'no-unused-labels': 'error', // eslint:recommended
		// 'no-useless-call': 'off',
		// 'no-useless-concat': 'off',
		// 'no-useless-escape': 'off',
		// 'no-void': 'off',
		// 'no-warning-comments': 'off',
		'no-with': 'error',
		// 'prefer-promise-reject-errors': 'off',
		// 'radix': 'off',
		// 'require-await': 'off',
		// 'vars-on-top': 'off',
		// 'wrap-iife': 'off',
		// 'yoda': 'off',

		// Strict Mode
		// http://eslint.org/docs/rules/#strict-mode
		// -----------------------------------------
		// 'script': 'off',

		// Variables
		// http://eslint.org/docs/rules/#variables
		// ---------------------------------------
		// 'init-declarations': 'off',
		// 'no-catch-shadow': 'off',
		'no-delete-var': 'error', // eslint:recommended
		// 'no-label-var': 'off',
		// 'no-restricted-globals': 'off',
		// 'no-shadow': 'off',
		// 'no-shadow-restricted-names': 'off',
		'no-undef': 'error', // eslint:recommended
		// 'no-undef-init': 'off',
		// 'no-undefined': 'off',
		'no-unused-vars': ['error', {args: 'after-used'}], // eslint:recommended
		// 'no-use-before-define': 'off',

		// Node.js and CommonJS
		// http://eslint.org/docs/rules/#nodejs-and-commonjs
		// -------------------------------------------------
		// 'callback-return': 'off',
		// 'global-require': 'off',
		// 'handle-callback-err': 'off',
		// 'no-buffer-constructor': 'off',
		// 'no-mixed-requires': 'off',
		// 'no-new-require': 'off',
		// 'no-path-concat': 'off',
		// 'no-process-env': 'off',
		// 'no-process-exit': 'off',
		// 'no-restricted-modules': 'off',
		// 'no-sync': 'off',

		// Stylistic Issues
		// http://eslint.org/docs/rules/#stylistic-issues
		// ----------------------------------------------
		'array-bracket-newline': 'off', // eslint:recommended
		'array-bracket-spacing': ['error', 'never'],
		'array-element-newline': 'off', // eslint:recommended
		'block-spacing': ['error', 'never'],
		'brace-style': 'error',
		camelcase: ['error', {properties: 'never'}],
		// 'capitalized-comments': 'off',
		'comma-dangle': ['error', 'always-multiline'],
		'comma-spacing': 'error',
		'comma-style': 'error',
		'computed-property-spacing': 'error',
		// 'consistent-this': 'off',
		'eol-last': 'error',
		'func-call-spacing': 'error',
		// 'func-name-matching': 'off',
		// 'func-names': 'off',
		// 'func-style': 'off',
		// 'id-blacklist': 'off',
		// 'id-length': 'off',
		// 'id-match': 'off',
		indent: ['error', 'tab'],
		'no-tabs': 'off',
		// 'jsx-quotes': 'off',
		'key-spacing': 'error',
		'keyword-spacing': 'error',
		// 'line-comment-position': 'off',
		'linebreak-style': 'error',
		// 'lines-around-comment': 'off',
		// 'max-depth': 'off',
		'max-len': [
			'error',
			{
				code: 80,
				tabWidth: 2,
				ignoreComments: true,
				ignoreUrls: true,
				ignorePattern: '^goog.(module|require)',
			},
		],
		// 'max-lines': 'off',
		// 'max-nested-callbacks': 'off',
		// 'max-params': 'off',
		// 'max-statements': 'off',
		// 'max-statements-per-line': 'off',
		// 'multiline-ternary': 'off',
		'new-cap': 'error',
		// 'new-parens': 'off',
		// 'newline-per-chained-call': 'off',
		'no-array-constructor': 'error',
		// 'no-bitwise': 'off',
		// 'no-continue': 'off',
		// 'no-inline-comments': 'off',
		// 'no-lonely-if': 'off',
		// 'no-mixed-operators': 'off',
		'no-mixed-spaces-and-tabs': ['error', 'smart-tabs'],
		// 'no-multi-assign': 'off',
		'no-multiple-empty-lines': ['error', {max: 2}],
		// 'no-negated-condition': 'off',
		// 'no-nested-ternary': 'off',
		'no-new-object': 'error',
		// 'no-plusplus': 'off',
		// 'no-restricted-syntax': 'off',
		'no-tabs': 'off',
		// 'no-ternary': 'off',
		'no-trailing-spaces': 'error',
		// 'no-underscore-dangle': 'off',
		// 'no-unneeded-ternary': 'off',
		// 'no-whitespace-before-property': 'off',
		// 'nonblock-statement-body-position': 'off',
		// 'object-curly-newline': 'off',
		'object-curly-spacing': 'error',
		// 'object-property-newline': 'off',
		'one-var': [
			'error',
			{
				var: 'never',
				let: 'never',
				const: 'never',
			},
		],
		// 'one-var-declaration-per-line': 'off',
		// 'operator-assignment': 'off',
		// 'operator-linebreak': 'off',
		'padded-blocks': ['error', 'never'],
		// 'padding-line-between-statements': 'off',
		'quote-props': ['error', 'consistent'],
		quotes: ['error', 'single', {allowTemplateLiterals: true}],
		'require-jsdoc': [
			'warn',
			{
				require: {
					FunctionDeclaration: true,
					MethodDefinition: true,
					ClassDeclaration: true,
				},
			},
		],
		semi: 'error',
		'semi-spacing': 'error',
		// 'semi-style': 'off',
		// 'sort-keys': 'off',
		// 'sort-vars': 'off',
		'space-before-blocks': 'error',
		'space-before-function-paren': [
			'error',
			{
				asyncArrow: 'always',
				anonymous: 'never',
				named: 'never',
			},
		],
		// 'space-in-parens': 'off',
		// 'space-infix-ops': 'off',
		// 'space-unary-ops': 'off',
		'spaced-comment': ['error', 'always'],
		'switch-colon-spacing': 'error',
		// 'template-tag-spacing': 'off',
		// 'unicode-bom': 'off',
		// 'wrap-regex': 'off',

		// ECMAScript 6
		// http://eslint.org/docs/rules/#ecmascript-6
		// ------------------------------------------
		// 'arrow-body-style': 'off',
		'arrow-parens': ['error', 'always'],
		// 'arrow-spacing': 'off',
		'constructor-super': 'error', // eslint:recommended
		'generator-star-spacing': ['error', 'after'],
		// 'no-class-assign': 'off',
		// 'no-confusing-arrow': 'off',
		// 'no-const-assign': 'off', // eslint:recommended
		// 'no-dupe-class-members': 'off', // eslint:recommended
		// 'no-duplicate-imports': 'off',
		'no-new-symbol': 'error', // eslint:recommended
		// 'no-restricted-imports': 'off',
		'no-this-before-super': 'error', // eslint:recommended
		// 'no-useless-computed-key': 'off',
		// 'no-useless-constructor': 'off',
		// 'no-useless-rename': 'off',
		'no-var': 'error',
		// 'object-shorthand': 'off',
		'prefer-arrow-callback': 'error',
		'prefer-const': 'error',
		// 'prefer-destructuring': 'off',
		// 'prefer-numeric-literals': 'off',
		'prefer-rest-params': 'error',
		'prefer-spread': 'error',
		'prefer-template': 'error',
		// 'require-yield': 'error', // eslint:recommended
		'rest-spread-spacing': 'error',
		// 'sort-imports': 'off',
		// 'symbol-description': 'off',
		// 'template-curly-spacing': 'off',
		'yield-star-spacing': ['error', 'after'],
	},
	env: {
		es6: true,
	},
};