.eslintrc.json

{
  "extends": [
    "eslint:recommended"
  ],
  "parserOptions": {
    "ecmaVersion": 8,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true,
      "impliedStrict": true,
      "modules": true
    }
  },
  "parser": "babel-eslint",
  "plugins": [
    "header"
  ],
  "env": {
    "browser": true,
    "node": true,
    "jquery": true,
    "es6": true
  },
  "rules": {
    "array-bracket-spacing": [
      2,
      "always"
    ],
    "array-callback-return": 2,
    "arrow-body-style": 0,
    "arrow-parens": [
      2,
      "always"
    ],
    "arrow-spacing": [
      2,
      {
        "before": true,
        "after": true
      }
    ],
    "block-scoped-var": 2,
    "brace-style": [
      2,
      "1tbs",
      {
        "allowSingleLine": false
      }
    ],
    "camelcase": [
      2,
      {
        "properties": "never"
      }
    ],
    "capitalized-comments": 0,
    "class-methods-use-this": 0,
    "comma-spacing": [
      2,
      {
        "before": false,
        "after": true
      }
    ],
    "comma-style": [
      2,
      "last"
    ],
    "complexity": [
      0,
      10
    ],
    "consistent-this": [
      2,
      "self"
    ],
    "constructor-super": 2,
    "curly": [
      2,
      "all"
    ],
    "dot-notation": 2,
    "eqeqeq": [
      2,
      "smart"
    ],
    "func-call-spacing": [
      2,
      "never"
    ],
    "func-name-matching": 0,
    "func-names": 2,
    "func-style": [
      2,
      "declaration",
      {
        "allowArrowFunctions": true
      }
    ],
    "generator-star-spacing": [
      2,
      {
        "before": false,
        "after": true
      }
    ],
    "global-require": 2,
    "guard-for-in": 2,
    "id-blacklist": 0,
    "indent": [
      2,
      4,
      {
        "SwitchCase": 0
      }
    ],
    "jsx-quotes": [
      2,
      "prefer-double"
    ],
    "key-spacing": [
      2,
      {
        "beforeColon": false,
        "afterColon": true,
        "mode": "strict"
      }
    ],
    "keyword-spacing": [
      2,
      {
        "before": true,
        "after": true,
        "overrides": {}
      }
    ],
    "line-comment-position": 0,
    "linebreak-style": 2,
    "max-lines": [
      1,
      {
        "max": 450,
        "skipBlankLines": true,
        "skipComments": false
      }
    ],
    "max-nested-callbacks": [
      2,
      {
        "max": 2
      }
    ],
    "max-statements-per-line": [
      2,
      {
        "max": 1
      }
    ],
    "multiline-ternary": [
      1,
      "never"
    ],
    "new-cap": 2,
    "new-parens": 2,
    "newline-before-return": 0,
    "newline-per-chained-call": 0,
    "no-alert": 2,
    "no-array-constructor": 2,
    "no-await-in-loop": 2,
    "no-caller": 2,
    "no-case-declarations": 2,
    "no-class-assign": 2,
    "no-compare-neg-zero": 2,
    "no-cond-assign": [
      2,
      "except-parens"
    ],
    "no-confusing-arrow": 2,
    "no-console": 2,
    "no-const-assign": 2,
    "no-constant-condition": 2,
    "no-debugger": 2,
    "no-div-regex": 2,
    "no-dupe-args": 2,
    "no-dupe-class-members": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-duplicate-imports": [
      2,
      {
        "includeExports": true
      }
    ],
    "no-else-return": 2,
    "no-empty": 2,
    "no-empty-function": 2,
    "no-empty-pattern": 2,
    "no-eval": 2,
    "no-ex-assign": 2,
    "no-extend-native": 2,
    "no-extra-bind": 2,
    "no-extra-label": 2,
    "no-extra-parens": 0,
    "no-extra-semi": 2,
    "no-fallthrough": 2,
    "no-floating-decimal": 2,
    "no-func-assign": 2,
    "no-global-assign": 2,
    "no-implicit-globals": 0,
    "no-implied-eval": 2,
    "no-inner-declarations": 0,
    "no-invalid-regexp": 2,
    "no-irregular-whitespace": 2,
    "no-iterator": 2,
    "no-labels": 2,
    "no-lone-blocks": 2,
    "no-lonely-if": 2,
    "no-loop-func": 2,
    "no-magic-numbers": 0,
    "no-mixed-operators": [
      2,
      {
        "allowSamePrecedence": false
      }
    ],
    "no-mixed-spaces-and-tabs": 2,
    "no-multi-assign": 2,
    "no-multi-spaces": [
      2,
      {
        "exceptions": {
          "Property": false
        }
      }
    ],
    "no-multi-str": 0,
    "no-multiple-empty-lines": [
      2,
      {
        "max": 1
      }
    ],
    "no-native-reassign": 2,
    "no-negated-condition": 2,
    "no-nested-ternary": 2,
    "no-new": 2,
    "no-new-func": 2,
    "no-new-object": 2,
    "no-new-symbol": 2,
    "no-new-wrappers": 2,
    "no-octal-escape": 2,
    "no-process-env": 2,
    "no-process-exit": 2,
    "no-proto": 2,
    "no-redeclare": 2,
    "no-return-assign": [
      2,
      "always"
    ],
    "no-return-await": 2,
    "no-script-url": 2,
    "no-self-assign": [
      2,
      {
        "props": true
      }
    ],
    "no-self-compare": 2,
    "no-sequences": 2,
    "no-shadow": [
      2,
      {
        "hoist": "functions"
      }
    ],
    "no-shadow-restricted-names": 2,
    "no-spaced-func": 2,
    "no-tabs": 0,
    "no-template-curly-in-string": 2,
    "no-ternary": 0,
    "no-this-before-super": 2,
    "no-throw-literal": 2,
    "no-undef-init": 2,
    "no-undefined": 2,
    "no-underscore-dangle": 2,
    "no-unexpected-multiline": 2,
    "no-unmodified-loop-condition": 2,
    "no-unneeded-ternary": [
      2,
      {
        "defaultAssignment": false
      }
    ],
    "no-unreachable": 2,
    "no-unsafe-finally": 2,
    "no-unsafe-negation": 2,
    "no-unused-expressions": 2,
    "no-unused-vars": [
      2,
      {
        "vars": "all",
        "args": "after-used"
      }
    ],
    "no-use-before-define": [
      2,
      {
        "classes": false,
        "functions": false,
        "variables": false
      }
    ],
    "no-useless-computed-key": 2,
    "no-useless-concat": 2,
    "no-useless-constructor": 2,
    "no-useless-escape": 2,
    "no-useless-rename": 2,
    "no-useless-return": 2,
    "no-var": 0,
    "no-void": 2,
    "no-warning-comments": 1,
    "no-whitespace-before-property": 2,
    "no-with": 2,
    "object-curly-newline": 0,
    "object-curly-spacing": [
      2,
      "always"
    ],
    "object-property-newline": [
      2,
      {
        "allowMultiplePropertiesPerLine": true
      }
    ],
    "object-shorthand": [
      2,
      "always"
    ],
    "one-var": [
      2,
      "never"
    ],
    "one-var-declaration-per-line": 0,
    "operator-assignment": [
      2,
      "always"
    ],
    "padded-blocks": [
      2,
      "never"
    ],
    "prefer-arrow-callback": 2,
    "prefer-const": 2,
    "prefer-destructuring": 0,
    "prefer-numeric-literals": 2,
    "prefer-promise-reject-errors": 2,
    "prefer-rest-params": 2,
    "prefer-spread": 2,
    "prefer-template": 0,
    "quote-props": [
      2,
      "as-needed"
    ],
    "quotes": [
      2,
      "single",
      "avoid-escape"
    ],
    "radix": 2,
    "require-yield": 2,
    "rest-spread-spacing": [
      2,
      "never"
    ],
    "semi": [
      2,
      "always"
    ],
    "semi-spacing": [
      2,
      {
        "before": false,
        "after": true
      }
    ],
    "sort-imports": 0,
    "sort-keys": 0,
    "space-before-blocks": [
      2,
      "always"
    ],
    "space-before-function-paren": [
      2,
      {
        "anonymous": "never",
        "named": "never",
        "asyncArrow": "always"
      }
    ],
    "space-in-parens": [
      2,
      "always"
    ],
    "space-infix-ops": 2,
    "symbol-description": 2,
    "valid-typeof": [
      2,
      {
        "requireStringLiterals": false
      }
    ],
    "vars-on-top": 0,
    "wrap-iife": [
      2,
      "outside"
    ],
    "wrap-regex": 2
  },
  "overrides": [
    {
      "files": ["*.test.js", "*.test.jsx", "tests/**"],
      "globals": {
        "after": true,
        "afterAll": true,
        "afterEach": true,
        "before": true,
        "beforeAll": true,
        "beforeEach": true,
        "describe": true,
        "expect": true,
        "it": true,
        "jest": true,
        "test": true
      },
      "rules": {
        "no-empty-function": 0,
        "no-console": 0,
        "max-nested-callbacks": 0,
        "no-undefined": 0
      }
    }
  ]
}