.eslintrc.js

var production = process.env.NODE_ENV === 'production';

module.exports = {
  'root': true,

  'env': {
    'es6': true,
    'browser': true,
    'node': true,
    'mocha': true
  },

  "parserOptions": {
    ecmaVersion: 6,
    sourceType: "module"
  },

  'ecmaFeatures': {
    'arrowFunctions': true,
    'destructuring': true,
    'classes': true,
    'defaultParams': true,
    'blockBindings': true,
    'modules': true,
    'objectLiteralComputedProperties': true,
    'objectLiteralShorthandMethods': true,
    'objectLiteralShorthandProperties': true,
    'restParams': true,
    'spread': true,
    'forOf': false,
    'generators': false,
    'templateStrings': true,
    'superInFunctions': true,
    'experimentalObjectRestSpread': true
  },

  'rules': {
    'accessor-pairs': 2,
    'array-bracket-spacing': 0,
    'block-scoped-var': 0,
    'brace-style': [2, '1tbs', { 'allowSingleLine': true }],
    'camelcase': 0,
    'comma-dangle': [2, 'never'],
    'comma-spacing': [2, { 'before': false, 'after': true }],
    'comma-style': [2, 'last'],
    'complexity': 0,
    'computed-property-spacing': 0,
    'consistent-return': 0,
    'consistent-this': 0,
    'constructor-super': 2,
    'curly': [2, 'multi-line'],
    'default-case': 0,
    'dot-location': [2, 'property'],
    'dot-notation': 0,
    'eol-last': 2,
    'eqeqeq': [2, 'allow-null'],
    'func-names': 0,
    'func-style': 0,
    'generator-star-spacing': [2, { 'before': true, 'after': true }],
    'guard-for-in': 0,
    'handle-callback-err': [2, '^(err|error)$' ],
    'indent': [2, 2, { 'SwitchCase': 1 }],
    'key-spacing': [2, { 'beforeColon': false, 'afterColon': true }],
    'linebreak-style': 0,
    'lines-around-comment': 0,
    'max-nested-callbacks': 0,
    'new-cap': [2, { 'newIsCap': true, 'capIsNew': false }],
    'new-parens': 2,
    'newline-after-var': 0,
    'no-alert': 0,
    'no-array-constructor': 2,
    'no-caller': 2,
    'no-catch-shadow': 0,
    'no-cond-assign': 2,
    'no-console': 0,
    'no-constant-condition': 0,
    'no-continue': 0,
    'no-control-regex': 2,
    'no-debugger': production ? 2 : 0,
    'no-delete-var': 2,
    'no-div-regex': 0,
    'no-dupe-args': 2,
    'no-dupe-keys': 2,
    'no-duplicate-case': 2,
    'no-else-return': 0,
    'no-empty': 0,
    'no-empty-character-class': 2,
    'no-eq-null': 0,
    'no-eval': 2,
    'no-ex-assign': 2,
    'no-extend-native': 2,
    'no-extra-bind': 2,
    'no-extra-boolean-cast': 2,
    'no-extra-parens': 0,
    'no-extra-semi': 0,
    'no-fallthrough': 2,
    'no-floating-decimal': 2,
    'no-func-assign': 2,
    'no-implied-eval': 2,
    'no-inline-comments': 0,
    'no-inner-declarations': [2, 'functions'],
    'no-invalid-regexp': 2,
    'no-irregular-whitespace': 2,
    'no-iterator': 2,
    'no-label-var': 2,
    'no-labels': 2,
    'no-lone-blocks': 2,
    'no-lonely-if': 0,
    'no-loop-func': 0,
    'no-mixed-requires': 0,
    'no-mixed-spaces-and-tabs': 2,
    'no-multi-spaces': 2,
    'no-multi-str': 2,
    'no-multiple-empty-lines': [2, { 'max': 1 }],
    'no-native-reassign': 2,
    'no-negated-in-lhs': 2,
    'no-nested-ternary': 0,
    'no-new': 2,
    'no-new-func': 0,
    'no-new-object': 2,
    'no-new-require': 2,
    'no-new-wrappers': 2,
    'no-obj-calls': 2,
    'no-octal': 2,
    'no-octal-escape': 2,
    'no-param-reassign': 0,
    'no-path-concat': 0,
    'no-process-env': 0,
    'no-process-exit': 0,
    'no-proto': 0,
    'no-redeclare': 2,
    'no-regex-spaces': 2,
    'no-restricted-modules': 0,
    'no-return-assign': 2,
    'no-script-url': 0,
    'no-self-compare': 2,
    'no-sequences': 2,
    'no-shadow': 0,
    'no-shadow-restricted-names': 2,
    'no-spaced-func': 2,
    'no-sparse-arrays': 2,
    'no-sync': 0,
    'no-ternary': 0,
    'no-this-before-super': 2,
    'no-throw-literal': 2,
    'no-trailing-spaces': 2,
    'no-undef': 2,
    'no-undef-init': 2,
    'no-undefined': 0,
    'no-underscore-dangle': 0,
    'no-unexpected-multiline': 2,
    'no-unneeded-ternary': 2,
    'no-unreachable': 2,
    'no-unused-expressions': 0,
    'no-unused-vars': [2, { 'vars': 'all', 'args': 'none' }],
    'no-use-before-define': 0,
    'no-var': 0,
    'no-void': 0,
    'no-warning-comments': 0,
    'no-with': 2,
    'object-curly-spacing': 0,
    'object-shorthand': 0,
    'one-var': [2, { 'initialized': 'never' }],
    'operator-assignment': 0,
    'operator-linebreak': [2, 'after', { 'overrides': { '?': 'before', ':': 'before' } }],
    'padded-blocks': 0,
    'prefer-const': 0,
    'quote-props': 0,
    'quotes': [2, 'single', 'avoid-escape'],
    'radix': 2,
    'semi': [2, 'always'],
    'semi-spacing': 0,
    'sort-vars': 0,
    'keyword-spacing': 2,
    'space-before-blocks': [2, 'always'],
    'space-before-function-paren': [2, 'never'],
    'space-in-parens': [2, 'never'],
    'space-infix-ops': 2,
    'space-unary-ops': [2, { 'words': true, 'nonwords': false }],
    'spaced-comment': [2, 'always', { 'markers': ['global', 'globals', 'eslint', 'eslint-disable', '*package', '!'] }],
    'strict': 0,
    'use-isnan': 2,
    'valid-jsdoc': 0,
    'valid-typeof': 2,
    'vars-on-top': 0,
    'wrap-iife': [2, 'any'],
    'wrap-regex': 0,
    'yoda': [2, 'never']
  }
};