.eslintrc.js

module.exports = {
  env: {
    node: true,
    es6: true
  },
  parserOptions: {
    ecmaVersion: 8,
    sourceType: 'module'
  },
  ecmaFeatures: {
    arrowFunctions: true,
    blockBindings: true,
    classes: true,
    defaultParameters: true,
    destructuring: true,
    forOf: true,
    generators: true,
    modules: true,
    objectLiteralComputedProperties: true,
    objectLiteralDuplicateProperties: true,
    objectLiteralShorthandMethods: true,
    objectLiteralShorthandProperties: true,
    regexUFlag: true,
    regexYFlag: true,
    restParams: true,
    spread: true,
    superInFunctions: true,
    templateStrings: true,
    unicodeCodePointEscapes: true,
    globalReturn: true
  },
  rules: {
    'comma-dangle': [2, 'never'],
    // "no-console": 1,
    'no-constant-condition': 2,
    'no-control-regex': 2,
    'no-debugger': 1,
    'no-dupe-keys': 2,
    'no-duplicate-case': 2,
    'no-empty-character-class': 2,
    'no-empty': 2,
    'no-extra-boolean-cast': 2,
    'no-extra-semi': 2,
    'no-func-assign': 2,
    'no-inner-declarations': 2,
    'no-invalid-regexp': 2,
    'no-irregular-whitespace': 2,
    'no-negated-in-lhs': 2,
    'no-unreachable': 2,
    'use-isnan': 2,
    'valid-typeof': 2,

    'accessor-pairs': 2,
    'block-scoped-var': 2,
    // "curly": 2,
    'default-case': 2,
    'dot-location': [2, 'property'],
    'dot-notation': 2,
    eqeqeq: [2, 'smart'],
    'no-alert': 1,
    'no-caller': 2,
    'no-case-declarations': 2,
    'no-div-regex': 1,
    // "no-else-return": 2,
    'no-eval': 2,
    'no-extend-native': 2,
    'no-extra-bind': 2,
    'no-fallthrough': 2,
    'no-floating-decimal': 2,
    'no-implied-eval': 2,
    'no-iterator': 2,
    'no-labels': 2,
    'no-lone-blocks': 2,
    'no-loop-func': 2,
    'no-multi-spaces': 2,
    'no-multi-str': 2,
    'no-native-reassign': 2,
    'no-new-func': 2,
    'no-new-wrappers': 2,
    'no-new': 2,
    // "no-octal-escape": 2,
    // "no-octal": 2,
    // "no-param-reassign": 2,
    'no-proto': 2,
    'no-redeclare': 2,
    'no-return-assign': 2,
    'no-self-compare': 2,
    'no-throw-literal': 2,
    // "no-unused-expressions": [2, { "allowShortCircuit": true }],
    'no-useless-call': 2,
    'no-useless-concat': 2,
    'no-void': 2,
    // "no-warning-comments": 1,
    'no-with': 2,
    radix: [2, 'as-needed'],
    'vars-on-top': 2,
    'wrap-iife': [2, 'inside'],
    yoda: 2,

    // "strict": [ 2, "function" ],

    'no-catch-shadow': 2,
    'no-delete-var': 2,
    'no-shadow-restricted-names': 2,
    'no-shadow': 2,
    'no-undef-init': 2,
    // "no-unused-vars": 2,
    // "no-use-before-define": 2,

    // 'global-require': 2,
    'handle-callback-err': 1,
    'no-new-require': 2,

    // "array-bracket-spacing": [ 2, "always" ],
    'block-spacing': [2, 'always'],
    'brace-style': [2, '1tbs', { allowSingleLine: false }],
    camelcase: [2, { properties: 'always' }],
    'comma-spacing': [2, { before: false, after: true }],
    'comma-style': [2, 'last'],
    // "computed-property-spacing": [ 2, "always" ],
    'consistent-this': [2, 'self'],
    // "eol-last": 2,
    // "func-style": [ 2, "expression" ],
    // "indent": [ 2, 4, { "SwitchCase": 1 } ],
    'key-spacing': [2, { beforeColon: false, afterColon: true }],
    // "new-cap": 2,
    'new-parens': 2,
    'newline-after-var': [2, 'always'],
    'no-array-constructor': 2,
    // 'no-bitwise': 2,
    'no-continue': 2,
    'no-lonely-if': 2,
    'no-mixed-spaces-and-tabs': 2,
    'no-multiple-empty-lines': [2, { max: 2, maxEOF: 1 }],
    'no-nested-ternary': 2,
    'no-new-object': 2,
    'no-spaced-func': 2,
    // "no-trailing-spaces": [2, { "skipBlankLines": true }],
    'no-unneeded-ternary': 2,
    'object-curly-spacing': [2, 'always'],
    // "one-var": [ 2, "always" ],
    // "operator-linebreak": [2, "none"],
    // "quote-props": [ 2, "always" ],
    quotes: [2, 'single', 'avoid-escape'],
    semi: [2, 'always'],
    'keyword-spacing': [2, { before: true, after: true }],
    'space-after-keywords': 'off',
    // "space-before-function-paren": [ 2, "never" ],
    'space-infix-ops': 2,
    'space-unary-ops': [2, { words: true, nonwords: false }],
    'spaced-comment': [2, 'always'],
    'arrow-parens': [2, 'always'],
    'arrow-spacing': 2,
    'constructor-super': 2,
    'generator-star-spacing': [2, { before: true, after: false }],
    'no-class-assign': 2,
    'no-const-assign': 2,
    'no-dupe-class-members': 2,
    'no-this-before-super': 2,
    'no-var': 2,
    'prefer-arrow-callback': 1,
    'prefer-spread': 1,
    'require-yield': 2
  }
};