.eslintrc.json

{
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaFeatures": {
      "ecmaVersion": 2017,
      "sourceType": "module"
    }
  },
  "env": {
    "browser": true,
    "node": true
  },
  "rules": {
    "accessor-pairs": 2,
    "array-bracket-spacing": [
      2,
      "never"
    ],
    "array-bracket-newline": 0,
    "array-callback-return": 2,
    "array-element-newline": 0,
    "arrow-body-style": [
      2,
      "as-needed"
    ],
    "arrow-parens": [
      2,
      "always"
    ],
    "arrow-spacing": [
      2,
      {
        "before": true,
        "after": true
      }
    ],
    "block-scoped-var": 2,
    "block-spacing": [
      2,
      "never"
    ],
    "brace-style": [
      2,
      "1tbs",
      {
        "allowSingleLine": false
      }
    ],
    "callback-return": 2,
    "camelcase": [
      2,
      {
        "properties": "always"
      }
    ],
    "capitalized-comments": 2,
    "class-methods-use-this": 2,
    "comma-dangle": [
      2,
      "always-multiline"
    ],
    "comma-spacing": [
      2,
      {
        "before": false,
        "after": true
      }
    ],
    "comma-style": [
      2,
      "last"
    ],
    "complexity": [
      2,
      {
        "max": 5
      }
    ],
    "computed-property-spacing": [
      2,
      "never"
    ],
    "consistent-return": 2,
    "consistent-this": 2,
    "constructor-super": 2,
    "curly": 2,
    "default-case": 2,
    "dot-location": [
      2,
      "property"
    ],
    "dot-notation": [
      2,
      {
        "allowKeywords": true
      }
    ],
    "eol-last": [
      2,
      "always"
    ],
    "eqeqeq": [
      2,
      "always",
      {
        "null": "ignore"
      }
    ],
    "for-direction": 2,
    "func-call-spacing": 2,
    "func-name-matching": 2,
    "func-names": 2,
    "func-style": [
      2,
      "declaration"
    ],
    "function-paren-newline": [
      2,
      "multiline"
    ],
    "generator-star-spacing": [
      2,
      {
        "before": false,
        "after": true
      }
    ],
    "getter-return": 2,
    "global-require": 2,
    "guard-for-in": 2,
    "handle-callback-err": 2,
    "id-blacklist": [
      2,
      "error",
      "err",
      "cb",
      "callback"
    ],
    "id-length": [
      2,
      {
        "exceptions": [
          "e",
          "i"
        ]
      }
    ],
    "id-match": 2,
    "indent": [
      2,
      4
    ],
    "init-declarations": 2,
    "jsx-quotes": [
      2,
      "prefer-double"
    ],
    "key-spacing": [
      2,
      {
        "afterColon": true,
        "mode": "strict"
      }
    ],
    "keyword-spacing": 2,
    "line-comment-position": [
      2,
      {
        "position": "above"
      }
    ],
    "linebreak-style": [
      2,
      "unix"
    ],
    "lines-around-comment": [
      2,
      {
        "beforeLineComment": true,
        "beforeBlockComment": true,
        "allowObjectStart": false,
        "allowObjectEnd": false,
        "allowArrayStart": false,
        "allowArrayEnd": false
      }
    ],
    "lines-around-directive": [
      2,
      "always"
    ],
    "max-depth": [
      2,
      {
        "max": 4
      }
    ],
    "max-len": [
      2,
      120,
      4,
      {
        "ignoreUrls": true,
        "ignoreComments": false,
        "ignoreTrailingComments": false,
        "ignorePattern": "^(import.*|const\\s.*\\s=\\srequire.*)$"
      }
    ],
    "max-lines": [
      2,
      {
        "max": 250,
        "skipBlankLines": false,
        "skipComments": false
      }
    ],
    "max-nested-callbacks": [
      2,
      {
        "max": 2
      }
    ],
    "max-params": [
      2,
      3
    ],
    "max-statements": 2,
    "max-statements-per-line": 2,
    "multiline-comment-style": 2,
    "multiline-ternary": [
      2,
      "never"
    ],
    "new-cap": 2,
    "new-parens": 2,
    "newline-after-var": [
      2,
      "always"
    ],
    "newline-before-return": 2,
    "newline-per-chained-call": [
      2,
      {
        "ignoreChainWithDepth": 2
      }
    ],
    "no-alert": 2,
    "no-array-constructor": 2,
    "no-await-in-loop": 2,
    "no-bitwise": 2,
    "no-buffer-constructor": 2,
    "no-caller": 2,
    "no-case-declarations": 2,
    "no-catch-shadow": 2,
    "no-class-assign": 2,
    "no-compare-neg-zero": 2,
    "no-cond-assign": 2,
    "no-confusing-arrow": 2,
    "no-console": 2,
    "no-const-assign": 2,
    "no-constant-condition": 2,
    "no-continue": 2,
    "no-control-regex": 2,
    "no-debugger": 2,
    "no-delete-var": 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-character-class": 2,
    "no-empty-function": 2,
    "no-empty-pattern": 2,
    "no-eq-null": 2,
    "no-eval": 2,
    "no-ex-assign": 2,
    "no-extend-native": 2,
    "no-extra-bind": 2,
    "no-extra-boolean-cast": 2,
    "no-extra-label": 2,
    "no-extra-parens": 2,
    "no-extra-semi": 2,
    "no-fallthrough": 2,
    "no-floating-decimal": 2,
    "no-func-assign": 2,
    "no-global-assign": 2,
    "no-implicit-coercion": [
      2,
      {
        "allow": [
          "+",
          "!!"
        ]
      }
    ],
    "no-implicit-globals": 2,
    "no-implied-eval": 2,
    "no-inline-comments": 2,
    "no-inner-declarations": 2,
    "no-invalid-regexp": 2,
    "no-invalid-this": 2,
    "no-irregular-whitespace": 2,
    "no-iterator": 2,
    "no-label-var": 2,
    "no-labels": 2,
    "no-lone-blocks": 2,
    "no-lonely-if": 2,
    "no-loop-func": 2,
    "no-magic-numbers": [
      2,
      {
        "enforceConst": true,
        "ignore": [
          -1,
          0,
          1,
          10,
          100
        ],
        "ignoreArrayIndexes": true
      }
    ],
    "no-mixed-operators": 2,
    "no-mixed-requires": 2,
    "no-mixed-spaces-and-tabs": 2,
    "no-multi-spaces": 2,
    "no-multi-str": 2,
    "no-multiple-empty-lines": [
      2,
      {
        "max": 1,
        "maxBOF": 0,
        "maxEOF": 1
      }
    ],
    "no-negated-condition": 2,
    "no-nested-ternary": 2,
    "no-new": 2,
    "no-new-func": 2,
    "no-new-object": 2,
    "no-new-require": 2,
    "no-new-symbol": 2,
    "no-new-wrappers": 2,
    "no-obj-calls": 2,
    "no-octal": 2,
    "no-octal-escape": 2,
    "no-param-reassign": [
      2,
      {
        "props": true
      }
    ],
    "no-path-concat": 2,
    "no-plusplus": [
      2,
      {
        "allowForLoopAfterthoughts": true
      }
    ],
    "no-process-env": 0,
    "no-process-exit": 0,
    "no-proto": 2,
    "no-prototype-builtins": 2,
    "no-redeclare": [
      2,
      {
        "builtinGlobals": true
      }
    ],
    "no-regex-spaces": 2,
    "no-restricted-globals": 2,
    "no-restricted-imports": 2,
    "no-restricted-modules": 2,
    "no-restricted-properties": [
      2,
      {
        "message": "Please use Object.defineProperty instead.",
        "property": "__defineGetter__"
      },
      {
        "message": "Unexpected use of \"forEach\".",
        "property": "forEach"
      }
    ],
    "no-restricted-syntax": [
      2,
      "BreakStatement",
      "ContinueStatement",
      "ForOfStatement",
      "ImportExpression",
      "SwitchStatement",
      "WhileStatement"
    ],
    "no-return-assign": [
      2,
      "always"
    ],
    "no-return-await": 2,
    "no-script-url": 2,
    "no-self-assign": 2,
    "no-self-compare": 2,
    "no-sequences": 2,
    "no-shadow": 2,
    "no-shadow-restricted-names": 2,
    "no-sparse-arrays": 2,
    "no-sync": 2,
    "no-tabs": 2,
    "no-template-curly-in-string": 2,
    "no-ternary": 0,
    "no-this-before-super": 2,
    "no-throw-literal": 2,
    "no-trailing-spaces": [
      2,
      {
        "skipBlankLines": false
      }
    ],
    "no-undef": 2,
    "no-undef-init": 2,
    "no-undefined": 0,
    "no-underscore-dangle": 2,
    "no-unexpected-multiline": 2,
    "no-unmodified-loop-condition": 2,
    "no-unneeded-ternary": 2,
    "no-unreachable": 2,
    "no-unsafe-finally": 2,
    "no-unsafe-negation": 2,
    "no-unused-expressions": 2,
    "no-unused-labels": 2,
    "no-unused-vars": 2,
    "no-use-before-define": [
      2,
      "nofunc"
    ],
    "no-useless-call": 2,
    "no-useless-computed-key": 2,
    "no-useless-concat": 2,
    "no-useless-constructor": 2,
    "no-useless-escape": 2,
    "no-useless-rename": [
      2,
      {
        "ignoreImport": false,
        "ignoreExport": false,
        "ignoreDestructuring": false
      }
    ],
    "no-useless-return": 2,
    "no-var": 2,
    "no-void": 2,
    "no-warning-comments": [
      1,
      {
        "terms": [
          "FIXME",
          "NOTE",
          "TODO"
        ]
      }
    ],
    "no-whitespace-before-property": 2,
    "no-with": 2,
    "nonblock-statement-body-position": 2,
    "object-curly-newline": [
      2,
      {
        "ObjectExpression": {
          "consistent": true,
          "minProperties": 1
        },
        "ObjectPattern": {
          "consistent": true,
          "multiline": true
        }
      }
    ],
    "object-curly-spacing": [
      2,
      "always"
    ],
    "object-property-newline": [
      2,
      {
        "allowMultiplePropertiesPerLine": false
      }
    ],
    "object-shorthand": [
      2,
      "always",
      {
        "avoidQuotes": false,
        "ignoreConstructors": false
      }
    ],
    "one-var": [
      2,
      "never"
    ],
    "one-var-declaration-per-line": [
      2,
      "always"
    ],
    "operator-assignment": [
      2,
      "always"
    ],
    "operator-linebreak": [
      2,
      "after"
    ],
    "padded-blocks": [
      2,
      "never"
    ],
    "padding-line-between-statements": [
      2,
      {
        "blankLine": "always",
        "prev": "directive",
        "next": "*"
      },
      {
        "blankLine": "always",
        "prev": "import",
        "next": "export"
      },
      {
        "blankLine": "always",
        "prev": [
          "export",
          "import"
        ],
        "next": [
          "block-like",
          "const",
          "let",
          "var"
        ]
      },
      {
        "blankLine": "always",
        "prev": [
          "const",
          "let",
          "var"
        ],
        "next": "block-like"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": "function"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": [
          "block-like",
          "multiline-block-like"
        ]
      }
    ],
    "prefer-arrow-callback": 0,
    "prefer-const": [
      2,
      {
        "destructuring": "all"
      }
    ],
    "prefer-destructuring": [
      2,
      {
        "array": false,
        "object": true
      }
    ],
    "prefer-numeric-literals": 2,
    "prefer-promise-reject-errors": 2,
    "prefer-rest-params": 2,
    "prefer-spread": 2,
    "prefer-template": 2,
    "quote-props": [
      2,
      "as-needed",
      {
        "keywords": false
      }
    ],
    "quotes": [
      2,
      "single",
      {
        "avoidEscape": false,
        "allowTemplateLiterals": true
      }
    ],
    "radix": 0,
    "require-await": 2,
    "require-jsdoc": 0,
    "require-yield": 2,
    "rest-spread-spacing": [
      2,
      "never"
    ],
    "semi": [
      2,
      "always"
    ],
    "semi-spacing": [
      2,
      {
        "before": false,
        "after": true
      }
    ],
    "semi-style": [
      2,
      "last"
    ],
    "sort-imports": 0,
    "sort-keys": [
      2,
      "asc",
      {
        "caseSensitive": true
      }
    ],
    "sort-vars": 0,
    "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"
    ],
    "strict": [
      2,
      "never"
    ],
    "switch-colon-spacing": 2,
    "symbol-description": 2,
    "template-curly-spacing": [
      2,
      "never"
    ],
    "template-tag-spacing": [
      2,
      "never"
    ],
    "unicode-bom": [
      2,
      "never"
    ],
    "use-isnan": 2,
    "valid-jsdoc": 0,
    "valid-typeof": 2,
    "vars-on-top": 2,
    "wrap-iife": [
      2,
      "inside"
    ],
    "wrap-regex": 0,
    "yield-star-spacing": [
      2,
      {
        "before": true,
        "after": false
      }
    ],
    "yoda": 2
  }
}