.eslintrc.json

{
    "extends": ["eslint:recommended"],
    "parserOptions": {
      "parser": "babel-eslint",
      "ecmaVersion": 2019,
      "sourceType": "module"
    },
    "env" : {
      "browser": true,
      "node" : true
    },
    "rules": {
      // The rules below are listed in the order they appear on the eslint
      // rules page. All rules are listed to make it easier to keep in sync
      // as new ESLint rules are added.
      // http://eslint.org/docs/rules/
      // - Rules in the `eslint:recommended` ruleset that aren"t specifically
      //   mentioned by the google styleguide are listed but commented out (so
      //   they don"t override a base ruleset).
      // - Rules that are recommended but contradict the Google styleguide
      //   are explicitely set to the Google styleguide value.
  
      // Possible Errors
      // http://eslint.org/docs/rules/#possible-errors
      // ---------------------------------------------
      "no-cond-assign": 0, // eslint:recommended
      "no-console": 0, // eslint:recommended
      "no-constant-condition": 2, // eslint:recommended
      "no-control-regex": 2, // eslint:recommended
      "no-debugger": 2, // eslint:recommended
      "no-dupe-args": 2, // eslint:recommended
      "no-dupe-keys": 2, // eslint:recommended
      "no-duplicate-case": 2, // eslint:recommended
      "no-empty-character-class": 2, // eslint:recommended
      "no-empty": 2, // eslint:recommended
      "no-ex-assign": 2, // eslint:recommended
      "no-extra-boolean-cast": 2, // eslint:recommended
      "no-extra-parens": 0,
      "no-extra-semi": 2, // eslint:recommended
      "no-func-assign": 2, // eslint:recommended
      "no-inner-declarations": 2, // eslint:recommended
      "no-invalid-regexp": 2, // eslint:recommended
      "no-irregular-whitespace": 2, // eslint:recommended
      "no-obj-calls": 2, // eslint:recommended
      "no-prototype-builtins": 0,
      "no-regex-spaces": 2, // eslint:recommended
      "no-sparse-arrays": 2, // eslint:recommended
      "no-template-curly-in-string": 0,
      "no-unexpected-multiline": 2, // eslint:recommended
      "no-unreachable": 2, // eslint:recommended
      "no-unsafe-finally": 2, // eslint:recommended
      "no-unsafe-negation": 0,
      "use-isnan": 2, // eslint:recommended
      "valid-typeof": 2, // eslint:recommended
  
      // Best Practices
      // http://eslint.org/docs/rules/#best-practices
      // --------------------------------------------
  
      // "accessor-pairs": 0,
      // "array-callback-return": 0,
      // "block-scoped-var": 0,
      // "class-methods-use-this": 0,
      // "complexity": 0,
      // "consistent-return": 0
      // "curly": 0, // TODO(philipwalton): add an option to enforce braces with
      // the exception of simple, single-line if statements.
      // "default-case": 0,
      // "dot-location": 0,
      // "dot-notation": 0,
      // "eqeqeq": 0,
      "guard-for-in": 0,
      // "no-alert": 0,
      "no-caller": 2,
      // "no-case-declarations": 2, // eslint:recommended
      // "no-div-regex": 0,
      // "no-else-return": 0,
      // "no-empty-function": 0,
      // "no-empty-pattern": 2, // eslint:recommended
      // "no-eq-null": 0,
      // "no-eval": 0,
      "no-extend-native": 2,
      "no-extra-bind": 2,
      // "no-extra-label": 0,
      // "no-fallthrough": 2, // eslint:recommended
      // "no-floating-decimal": 0,
      // "no-global-assign": 0,
      // "no-implicit-coercion": 0,
      // "no-implicit-globals": 0,
      // "no-implied-eval": 0,
      "no-invalid-this": 0,
      // "no-iterator": 0,
      // "no-labels": 0,
      // "no-lone-blocks": 0,
      // "no-loop-func": 0,
      // "no-magic-numbers": 0,
      "no-multi-spaces": 2,
      "no-multi-str": 2,
      // "no-new-func": 0,
      "no-new-wrappers": 2,
      // "no-new": 0,
      // "no-octal-escape": 0,
      // "no-octal": 2, // eslint:recommended
      // "no-param-reassign": 0,
      // "no-proto": 0,
      // "no-redeclare": 2, // eslint:recommended
      // "no-return-assign": 0,
      // "no-script-url": 0,
      // "no-self-assign": 2, // eslint:recommended
      // "no-self-compare": 0,
      // "no-sequences": 0,
      "no-throw-literal": 2, // eslint:recommended
      // "no-unmodified-loop-condition": 0,
      // "no-unused-expressions": 0,
      // "no-unused-labels": 2, // eslint:recommended
      // "no-useless-call": 0,
      // "no-useless-concat": 0,
      // "no-useless-escape": 0,
      // "no-void": 0,
      // "no-warning-comments": 0,
      "no-with": 2,
      // "radix": 0,
      // "vars-on-top": 0,
      // "wrap-iife": 0,
      // "yoda": 0,
  
      // Strict Mode
      // http://eslint.org/docs/rules/#strict-mode
      // -----------------------------------------
      // "script": 0,
  
      // Variables
      // http://eslint.org/docs/rules/#variables
      // ---------------------------------------
      // "init-declarations": 0,
      // "no-catch-shadow": 0,
      // "no-delete-var": 2, // eslint:recommended
      // "no-label-var": 0,
      // "no-restricted-globals": 0,
      // "no-shadow-restricted-names": 0,
      // "no-shadow": 0,
      // "no-undef-init": 0,
      "no-undef": 0, // eslint:recommended
      // "no-undefined": 0,
      "no-unused-vars": [2, {"args": "none"}], // eslint:recommended
      // "no-use-before-define": 0,
  
      // Node.js and CommonJS
      // http://eslint.org/docs/rules/#nodejs-and-commonjs
      // -------------------------------------------------
      // "callback-return": 0,
      // "global-require": 0,
      // "handle-callback-err": 0,
      // "no-mixed-requires": 0,
      // "no-new-require": 0,
      // "no-path-concat": 0,
      // "no-process-env": 0,
      // "no-process-exit": 0,
      // "no-restricted-modules": 0,
      // "no-restricted-properties": 0,
      // "no-sync": 0,
  
      // Stylistic Issues
      // http://eslint.org/docs/rules/#stylistic-issues
      // ----------------------------------------------
      "array-bracket-spacing": [2, "never"],
      // "block-spacing": 0,
      //"brace-style": 2,
      "camelcase": 1,
      "comma-dangle": 0,
      "comma-spacing": 2,
      "comma-style": 2,
      "computed-property-spacing": 2,
      // "consistent-this": 0,
      "func-call-spacing": 2,
      // "func-name-matching": 0,
      // "func-names": 0,
      // "func-style": 0,
      // "id-blacklist": 0,
      // "id-length": 0,
      // "id-match": 0,
      // "indent": 0, // TODO(philipwalton): this rule isn"t compatible with
      // Google"s 4-space indent for line continuations.
      // "jsx-quotes": 0,
      "key-spacing": 2,
      "keyword-spacing": 0,
      // "line-comment-position": 0,
      // "lines-around-comment": 0,
      // "lines-around-directive": 0,
      // "max-depth": 0,
      // "max-lines": 0,
      // "max-nested-callbacks": 0,
      // "max-params": 0,
      // "max-statements-per-line": 0,
      // "max-statements": 0,
      // "multiline-ternary": 0, // TODO(philipwalton): add a rule to enforce the
      // operator appearing at the end of the line.
      "new-cap": 2,
      // "new-parens": 0,
      // "newline-after-var": 0,
      // "newline-before-return": 0,
      // "newline-per-chained-call": 0,
      "no-array-constructor": 2,
      // "no-bitwise": 0,
      // "no-continue": 0,
      // "no-inline-comments": 0,
      // "no-lonely-if": 0,
      // "no-mixed-operators": 0,
      "no-mixed-spaces-and-tabs": 2, // eslint:recommended
      "no-multiple-empty-lines": [2, {"max": 2}],
      // "no-negated-condition": 0,
      // "no-nested-ternary": 0,
      "no-new-object": 2,
      // "no-plusplus": 0,
      // "no-restricted-syntax": 0,
      // "no-tabs": 0,
      // "no-ternary": 0,
      "no-trailing-spaces": 2,
      // "no-underscore-dangle": 0,
      // "no-unneeded-ternary": 0,
      // "no-whitespace-before-property": 0,
      // "object-curly-newline": 0,
      // "object-property-newline": 0,
      // "one-var-declaration-per-line": 0,
      "one-var": [2, {
        "var": "never",
        "let": "never",
        "const": "never"
      }],
      // "operator-assignment": 0,
      // "operator-linebreak": 0,
      "padded-blocks": [2, "never"],
      "quote-props": [2, "as-needed"],
      "quotes": [2, "single", {"allowTemplateLiterals": true}],
      "semi-spacing": 2,
      "semi": [2, "always", { "omitLastInOneLineBlock": true }],
      // "sort-keys": 0,
      // "sort-vars": 0,
      "space-before-function-paren": [2, "never"],
      // "space-in-parens": 0,
      // "space-infix-ops": 0,
      // "space-unary-ops": 0,
      "spaced-comment": 0,
      // "unicode-bom": 0,
      // "wrap-regex": 0,
  
      // ECMAScript 6
      // http://eslint.org/docs/rules/#ecmascript-6
      // ------------------------------------------
      // "arrow-body-style": 0,
      "arrow-parens": [2, "as-needed"], // TODO(philipwalton): technically arrow
      // parens are optional but recommended.
      // ESLint doesn"t support a *consistent*
      // setting so "always" is used.
      // "arrow-spacing": 0,
      "constructor-super": 2, // eslint:recommended
      "generator-star-spacing": [2, "after"],
      // "no-class-assign": 0,
      // "no-confusing-arrow": 0,
      // "no-const-assign": 0, // eslint:recommended
      // "no-dupe-class-members": 0, // eslint:recommended
      // "no-duplicate-imports": 0,
      "no-new-symbol": 2, // eslint:recommended
      // "no-restricted-imports": 0,
      "no-this-before-super": 2,  // eslint:recommended
      // "no-useless-computed-key": 0,
      // "no-useless-constructor": 0,
      // "no-useless-rename": 0,
      // "object-shorthand": 0,
      // "prefer-arrow-callback": 0,
      "prefer-const": 2,
      // "prefer-numeric-literals": 0,
      // "prefer-reflect": 0,
      "prefer-spread": 2,
      "require-jsdoc": 0,
      // "prefer-template": 0,
      // "require-yield": 2, // eslint:recommended
      "rest-spread-spacing": 2,
      // "sort-imports": 0,
      // "symbol-description": 0,
      // "template-curly-spacing": 0,
      "yield-star-spacing": [2, "after"],
  
      // ^Google style
      // Brian Style
      "prefer-rest-params": 0,
      "linebreak-style": 0,
      "no-var": 2,
      "object-curly-spacing": 0,
      "brace-style":  [2, "stroustrup", { "allowSingleLine": true }],
      "max-len" : 0,
      "space-before-blocks" : [2, "never"],
      "eol-last" : [2, "never"]
    }
  }