.eslintrc.js

module.exports = {
    parser: 'babel-eslint',
  
    parserOptions: {
      ecmaVersion: 6,
      sourceType: 'module',
      ecmaFeatures: {
        impliedStrict: true
      },
    },
  
    // plugins: [
    //   "react"
    // ],
  
    env: {
      es6: true,
      jest: true,
      node: true
    },
  
    rules: {
      'no-alert': 1,
      'no-array-constructor': 1,
      'no-bitwise': 0,
      'no-caller': 1,
      'no-catch-shadow': 0,
      'no-class-assign': 0,
      'no-cond-assign': 1,
      'no-confusing-arrow': 0,
      'no-console': 0,
      'no-const-assign': 2,
      'no-constant-condition': 0,
      'no-continue': 0,
      'no-control-regex': 1,
      'no-debugger': 1,
      'no-delete-var': 2,
      'no-div-regex': 1,
      'no-dupe-keys': 2,
      'no-dupe-args': 2,
      'no-duplicate-case': 2,
      'no-else-return': 0,
      'no-empty': 0,
      'no-empty-character-class': 1,
      'no-eq-null': 0,
      'no-eval': 1,
      'no-ex-assign': 1,
      'no-extend-native': 1,
      'no-extra-bind': 1,
      'no-extra-boolean-cast': 1,
      'no-extra-parens': 0,
      'no-extra-semi': 1,
      'no-fallthrough': 1,
      'no-floating-decimal': 1,
      'no-func-assign': 2,
      'no-implied-eval': 1,
      'no-inline-comments': 0,
      'no-inner-declarations': [0, 'functions'],
      'no-invalid-regexp': 2,
      'no-irregular-whitespace': 1,
      'no-iterator': 1,
      'no-label-var': 1,
      'no-labels': [1, { allowLoop: true, allowSwitch: true }],
      'no-lone-blocks': 1,
      'no-lonely-if': 0,
      'no-loop-func': 0,
      'no-mixed-requires': [0, false],
      'no-mixed-spaces-and-tabs': [1, false],
      'no-multi-spaces': 0,
      'no-multi-str': 0,
      'no-multiple-empty-lines': [0, { max: 2 }],
      'no-native-reassign': 0,
      'no-negated-in-lhs': 1,
      'no-nested-ternary': 0,
      'no-new': 1,
      'no-new-func': 1,
      'no-new-object': 1,
      'no-new-require': 1,
      'no-new-wrappers': 1,
      'no-obj-calls': 1,
      'no-octal': 1,
      'no-octal-escape': 1,
      'no-param-reassign': 0,
      'no-path-concat': 1,
      'no-plusplus': 0,
      'no-process-env': 0,
      'no-process-exit': 0,
      'no-proto': 1,
      'no-redeclare': 1,
      'no-regex-spaces': 0,
      'no-reserved-keys': 0,
      'no-restricted-modules': 0,
      'no-return-assign': 1,
      'no-script-url': 1,
      'no-self-compare': 1,
      'no-sequences': 1,
      'no-shadow': 0,
      'no-shadow-restricted-names': 1,
      'no-spaced-func': 1,
      'no-sparse-arrays': 1,
      'no-sync': 0,
      'no-ternary': 0,
      'no-trailing-spaces': 1,
      'no-this-before-super': 0,
      'no-throw-literal': 1,
      'no-undef': 2,
      'no-undef-init': 0,
      'no-undefined': 0,
      'no-unexpected-multiline': 1,
      'no-underscore-dangle': 0,
      'no-unneeded-ternary': 1,
      'no-unreachable': 1,
      'no-unused-expressions': 1,
      'no-unused-vars': [1, { vars: 'all', args: 'none' }],
      'no-use-before-define': 0,
      'no-useless-call': 0,
      'no-void': 1,
      'no-var': 0,
      'no-warning-comments': [0, { terms: ['todo', 'fixme', 'xxx'], location: 'start' }],
      'no-with': 1,
      'array-bracket-spacing': [1, 'never'],
      'arrow-parens': 0,
      'arrow-spacing': [1, { before: true, after: true }],
      'accessor-pairs': 0,
      'block-scoped-var': 0,
      'brace-style': [0, '1tbs'],
      'callback-return': 0,
      'camelcase': 0,
      'comma-dangle': [1, 'never'],
      'comma-spacing': [1, { before: false, after: true }],
      'comma-style': [1, 'last'],
      'complexity': [0, 11],
      'computed-property-spacing': [0, 'never'],
      'consistent-return': 0,
      'consistent-this': [0, 'self'],
      'constructor-super': 1,
      'curly': [0, 'multi'],
      'default-case': 0,
      'dot-location': [1, 'property'],
      'dot-notation': [0, { allowKeywords: true }],
      'eol-last': 1,
      'eqeqeq': [1, 'smart'],
      'func-names': 0,
      'func-style': [0, 'declaration'],
      'generator-star-spacing': [1, 'after'],
      'guard-for-in': 0,
      'handle-callback-err': [1, '^(err|error)$'],
      'indent': [1, 2],
      'init-declarations': 0,
      'jsx-quotes': [1, 'prefer-double'],
      'key-spacing': [0, { beforeColon: false, afterColon: true }],
      'keyword-spacing': [1, { before: true, after: true }],
      'linebreak-style': [0, 'unix'],
      'lines-around-comment': 0,
      'max-depth': [0, 4],
      'max-len': [0, 80, 4],
      'max-nested-callbacks': [0, 2],
      'max-params': [0, 3],
      'max-statements': [0, 10],
      'new-cap': 0,
      'new-parens': 1,
      'newline-after-var': 0,
      'object-curly-spacing': [0, 'always', { objectsInObjects: false }],
      'object-shorthand': [1, 'always'],
      'one-var': [0, 'never'],
      'operator-assignment': [0, 'always'],
      'operator-linebreak': [1, 'after'],
      'padded-blocks': 0,
      'prefer-const': 0,
      'prefer-spread': 1,
      'quote-props': 0,
      'quotes': [0, 'single', 'avoid-escape'],
      'radix': 1,
      // 'react/jsx-uses-vars': ["error"],
      'require-yield': 0,
      'semi': 1,
      'semi-spacing': [1, { before: false, after: true }],
      'sort-vars': 0,
      'space-before-blocks': [1, 'always'],
      'space-before-function-paren': [1, { anonymous: 'never', named: 'never' }],
      'space-in-parens': [1, 'never'],
      'space-infix-ops': 1,
      'space-unary-ops': [0, { words: true, nonwords: false }],
      'spaced-comment': 0,
      'strict': [0, 'global'],
      'use-isnan': 2,
      'valid-jsdoc': 0,
      'valid-typeof': 2,
      'vars-on-top': 0,
      'wrap-iife': 0,
      'wrap-regex': 0,
      'yoda': [1, 'never', { exceptRange: true }],
    }
  };