index.js

module.exports = {
  parser: 'babel-eslint',

  parserOptions: {
    ecmaVersion: 7,
    ecmaFeatures: {
      experimentalObjectRestSpread: true,
      jsx: true
    },
    sourceType: 'module'
  },

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

  plugins: ['import', 'fp'],

  rules: {
    'accessor-pairs': [
      'error',
      {
        setWithoutGet: true,
        getWithoutSet: false
      }
    ],
    'array-bracket-spacing': [
      'error',
      'never',
      {
        singleValue: false,
        objectsInArrays: false,
        arraysInArrays: true
      }
    ],
    'array-callback-return': 'error',
    'arrow-body-style': 'off',
    'arrow-parens': ['error', 'as-needed'],
    'arrow-spacing': [
      'error',
      {
        before: true,
        after: true
      }
    ],
    'block-scoped-var': 'error',
    'block-spacing': ['error', 'always'],
    'brace-style': [
      'error',
      '1tbs',
      {
        allowSingleLine: true
      }
    ],
    'callback-return': 'error',
    camelcase: 'off',
    'class-methods-use-this': 'error',
    'comma-dangle': ['error', 'never'],
    'comma-spacing': [
      'error',
      {
        before: false,
        after: true
      }
    ],
    'comma-style': ['error', 'last'],
    complexity: ['error', 3],
    'computed-property-spacing': ['error', 'never'],
    'consistent-return': 'error',
    'consistent-this': ['error', 'that'],
    'constructor-super': 'error',
    curly: 'error',
    'default-case': 'error',
    'dot-location': ['error', 'property'],
    'dot-notation': 'error',
    'eol-last': 'error',
    eqeqeq: 'error',
    'func-call-spacing': ['error', 'never'],
    'func-names': 'error',
    'func-style': [
      'error',
      'declaration',
      {
        allowArrowFunctions: true
      }
    ],
    'generator-star-spacing': [
      'error',
      {
        before: false,
        after: true
      }
    ],
    'global-require': 'error',
    'guard-for-in': 'error',
    'handle-callback-err': ['error', '^(err|error)$'],
    'id-blacklist': 'off',
    'id-length': 'off',
    'id-match': 'off',
    indent: [
      'error',
      2,
      {
        SwitchCase: 1
      }
    ],
    'init-declarations': 'off',
    'jsx-quotes': ['error', 'prefer-single'],
    'key-spacing': [
      'error',
      {
        beforeColon: false,
        afterColon: true,
        mode: 'strict'
      }
    ],
    'keyword-spacing': [
      'error',
      {
        before: true,
        after: true
      }
    ],
    'linebreak-style': ['error', 'unix'],
    'lines-around-comment': 'off',
    'max-depth': ['warn', 4],
    'max-len': 'off',
    'max-lines': [
      'error',
      {
        max: 500,
        skipBlankLines: true,
        skipComments: true
      }
    ],
    'max-nested-callbacks': ['error', 3],
    'max-params': ['error', 5],
    'max-statements': 'off',
    'max-statements-per-line': [
      'error',
      {
        max: 1
      }
    ],
    'multiline-ternary': 'off',
    'new-cap': 'error',
    'new-parens': 'error',
    'newline-after-var': 'off',
    'newline-before-return': 'off',
    'newline-per-chained-call': [
      'error',
      {
        ignoreChainWithDepth: 3
      }
    ],
    'no-alert': 'error',
    'no-array-constructor': 'error',
    'no-bitwise': 'error',
    'no-caller': 'error',
    'no-case-declarations': 'error',
    'no-catch-shadow': 'error',
    'no-class-assign': 'error',
    'no-cond-assign': ['error', 'always'],
    'no-confusing-arrow': [
      'error',
      {
        allowParens: true
      }
    ],
    'no-console': 'off',
    'no-const-assign': 'error',
    'no-constant-condition': 'error',
    'no-continue': 'error',
    'no-control-regex': 'error',
    'no-debugger': 'warn',
    'no-delete-var': 'error',
    'no-div-regex': 'error',
    'no-dupe-args': 'error',
    'no-dupe-class-members': 'error',
    'no-dupe-keys': 'error',
    'no-duplicate-case': 'error',
    'no-duplicate-imports': 'error',
    'no-else-return': 'error',
    'no-empty': 'error',
    'no-empty-character-class': 'error',
    'no-empty-function': 'warn',
    'no-empty-pattern': 'error',
    'no-eq-null': 'error',
    'no-eval': 'error',
    'no-ex-assign': 'error',
    'no-extend-native': 'error',
    'no-extra-bind': 'error',
    'no-extra-boolean-cast': 'error',
    'no-extra-label': 'error',
    'no-extra-parens': ['error', 'functions'],
    'no-extra-semi': 'error',
    'no-fallthrough': 'error',
    'no-floating-decimal': 'error',
    'no-func-assign': 'error',
    'no-global-assign': 'error',
    'no-implicit-coercion': 'error',
    'no-implicit-globals': 'error',
    'no-implied-eval': 'error',
    'no-inner-declarations': ['error', 'both'],
    'no-inline-comments': 'off',
    'no-invalid-regexp': [
      'error',
      {
        allowConstructorFlags: ['u', 'y']
      }
    ],
    'no-invalid-this': 'error',
    'no-irregular-whitespace': 'error',
    'no-iterator': 'error',
    'no-label-var': 'error',
    'no-labels': 'error',
    'no-lone-blocks': 'error',
    'no-lonely-if': 'error',
    'no-loop-func': 'error',
    'no-magic-numbers': 'off',
    'no-mixed-operators': 'error',
    'no-mixed-requires': 'error',
    'no-mixed-spaces-and-tabs': 'error',
    'no-multi-spaces': 'error',
    'no-multi-str': 'error',
    'no-multiple-empty-lines': [
      'error',
      {
        max: 2
      }
    ],
    'no-native-reassign': 'error',
    'no-negated-condition': 'off',
    'no-negated-in-lhs': 'error',
    'no-nested-ternary': 'error',
    'no-new': 'error',
    'no-new-func': 'error',
    'no-new-object': 'error',
    'no-new-require': 'error',
    'no-new-symbol': 'error',
    'no-new-wrappers': 'error',
    'no-obj-calls': 'error',
    'no-octal': 'error',
    'no-octal-escape': 'error',
    'no-path-concat': 'error',
    'no-param-reassign': [
      'error',
      {
        props: true
      }
    ],
    'no-plusplus': [
      'error',
      {
        allowForLoopAfterthoughts: true
      }
    ],
    'no-process-env': 'off',
    'no-process-exit': 'off',
    'no-proto': 'error',
    'no-prototype-builtins': 'off',
    'no-redeclare': 'error',
    'no-regex-spaces': 'error',
    'no-restricted-globals': 'off',
    'no-restricted-imports': ['error', 'underscore'],
    'no-restricted-modules': 'off',
    'no-restricted-syntax': 'off',
    'no-return-assign': 'error',
    'no-script-url': 'error',
    'no-self-assign': 'error',
    'no-self-compare': 'error',
    'no-sequences': 'error',
    'no-shadow': [
      'error',
      {
        builtinGlobals: false
      }
    ],
    'no-shadow-restricted-names': 'error',
    'no-spaced-func': 'off',
    'no-sparse-arrays': 'error',
    'no-sync': 'off',
    'no-tabs': 'error',
    'no-template-curly-in-string': 'error',
    'no-ternary': 'off',
    'no-this-before-super': 'error',
    'no-throw-literal': 'error',
    'no-trailing-spaces': [
      'error',
      {
        skipBlankLines: true
      }
    ],
    'no-undef': [
      'error',
      {
        typeof: true
      }
    ],
    'no-undef-init': 'error',
    'no-undefined': 'off',
    'no-underscore-dangle': 'off',
    'no-unexpected-multiline': 'off',
    'no-unmodified-loop-condition': 'error',
    'no-unneeded-ternary': 'error',
    'no-unreachable': 'error',
    'no-unsafe-finally': 'error',
    'no-unsafe-negation': 'error',
    'no-unused-expressions': 'error',
    'no-unused-labels': 'error',
    'no-unused-vars': [
      'error',
      {
        vars: 'all',
        args: 'all',
        argsIgnorePattern: '_'
      }
    ],
    'no-use-before-define': [
      'error',
      {
        functions: true,
        classes: true
      }
    ],
    'no-useless-call': 'error',
    'no-useless-computed-key': 'error',
    'no-useless-concat': 'error',
    'no-useless-constructor': 'error',
    'no-useless-escape': 'error',
    'no-useless-rename': [
      'error',
      {
        ignoreDestructuring: false,
        ignoreImport: false,
        ignoreExport: false
      }
    ],
    'no-var': 'error',
    'no-void': 'error',
    'no-warning-comments': 'error',
    'no-whitespace-before-property': 'error',
    'no-with': 'error',
    'object-curly-newline': 'off',
    'object-curly-spacing': ['error', 'always'],
    'object-property-newline': [
      'error',
      {
        allowMultiplePropertiesPerLine: true
      }
    ],
    'object-shorthand': [
      'error',
      'always',
      {
        avoidQuotes: true
      }
    ],
    'one-var': ['error', 'never'],
    'one-var-declaration-per-line': 'off',
    'operator-assignment': ['error', 'never'],
    'operator-linebreak': ['error', 'after'],
    'padded-blocks': ['error', 'never'],
    'prefer-arrow-callback': [
      'error',
      {
        allowNamedFunctions: true
      }
    ],
    'prefer-const': 'error',
    'prefer-reflect': 'error',
    'prefer-rest-params': 'error',
    'prefer-spread': 'error',
    'prefer-template': 'error',
    'quote-props': ['error', 'as-needed'],
    quotes: ['error', 'single', 'avoid-escape'],
    radix: 'off',
    'require-jsdoc': 'off',
    'require-yield': 'error',
    'rest-spread-spacing': ['error', 'never'],
    semi: ['error', 'never'],
    'semi-spacing': [
      'error',
      {
        before: false,
        after: true
      }
    ],
    'sort-imports': 'off',
    'sort-keys': 'off',
    'sort-vars': 'off',
    'space-before-blocks': 'error',
    'space-before-function-paren': 'error',
    'space-in-parens': ['error', 'never'],
    'space-infix-ops': 'error',
    'space-unary-ops': [
      'error',
      {
        words: true,
        nonwords: false
      }
    ],
    'spaced-comment': 'off',
    strict: 'off',
    'symbol-description': 'error',
    'template-curly-spacing': 'error',
    'unicode-bom': ['error', 'never'],
    'use-isnan': 'error',
    'valid-jsdoc': [
      'error',
      {
        prefer: {
          return: 'return'
        },
        requireReturn: false
      }
    ],
    'valid-typeof': 'error',
    'vars-on-top': 'off',
    'wrap-iife': ['error', 'any'],
    'wrap-regex': 'error',
    'yield-star-spacing': ['error', 'after'],
    yoda: 'error',

    'fp/no-arguments': 'error',
    'fp/no-class': 'error',
    'fp/no-delete': 'error',
    'fp/no-events': 'error',
    'fp/no-get-set': 'error',
    'fp/no-let': 'error',
    'fp/no-loops': 'error',
    'fp/no-mutating-assign': 'error',
    'fp/no-mutating-methods': [
      'error',
      {
        allowedObjects: ['_', 'R']
      }
    ],
    'fp/no-mutation': [
      'error',
      {
        commonjs: true
      }
    ],
    'fp/no-nil': 'off',
    'fp/no-proxy': 'off',
    'fp/no-rest-parameters': 'off',
    'fp/no-this': 'off',
    'fp/no-throw': 'off',
    'fp/no-unused-expression': 'off',
    'fp/no-valueof-field': 'error',

    'import/default': 'error',
    'import/export': 'error',
    'import/extensions': [
      'error',
      {
        js: 'never',
        jsx: 'always',
        json: 'always',
        css: 'always'
      }
    ],
    'import/imports-first': 'error',
    'import/named': 'error',
    'import/namespace': 'error',
    'import/newline-after-import': 'error',
    'import/no-amd': 'error',
    'import/no-commonjs': 'error',
    'import/no-deprecated': 'error',
    'import/no-duplicates': 'error',
    'import/no-extraneous-dependencies': 'error',
    'import/no-mutable-exports': 'error',
    'import/no-named-as-default-member': 'error',
    'import/no-named-as-default': 'error',
    'import/no-namespace': 'off',
    'import/no-nodejs-modules': 'off',
    'import/no-restricted-paths': 'off',
    'import/no-unresolved': 'error',
    'import/order': [
      'error',
      {
        groups: [
          'builtin',
          'external',
          'internal',
          'parent',
          'sibling',
          'index'
        ]
      }
    ],
    'import/prefer-default-export': 'off'
  }
}