.eslintrc

{
  "parserOptions": {
    "parser": "espree",
    "ecmaVersion": 8,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true,
      "experimentalObjectRestSpread": true,
      "impliedStrict": true,
      "templateStrings": true
    }
  },
  "env": {
    "node": true,
    "browser": true,
    "shared-node-browser": true,
    "worker": true,
    "serviceworker": true,
    "commonjs": true,
    "jquery": true,
    "mongo": true,
    "jasmine": true,
    "mocha": true,
    "es6": true
  },
  "rules": {
    "for-direction": 2,
    "no-await-in-loop": 1,
    "function-paren-newline": [
      1,
      "multiline"
    ],
    "no-compare-neg-zero": 2,
    "no-cond-assign": [
      2,
      "except-parens"
    ],
    "no-console": 0,
    "no-constant-condition": 1,
    "no-control-regex": 1,
    "no-debugger": 1,
    "no-dupe-args": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-empty": 1,
    "no-empty-function": 1,
    "no-empty-character-class": 1,
    "no-ex-assign": 2,
    "no-extra-boolean-cast": 2,
    "no-extra-parens": [
      1,
      "all",
      {
        "conditionalAssign": true,
        "returnAssign": true,
        "nestedBinaryExpressions": true,
        "ignoreJSX": "all",
        "enforceForArrowConditionals": false
      }
    ],
    "no-extra-semi": 2,
    "no-func-assign": 2,
    "no-inner-declarations": [
      2,
      "both"
    ],
    "no-invalid-regexp": 2,
    "no-irregular-whitespace": [
      2,
      {
        "skipComments": true,
        "skipTemplates": true,
        "skipStrings": true,
        "skipRegExps": true
      }
    ],
    "no-obj-calls": 2,
    "no-prototype-builtins": 0,
    "no-regex-spaces": 2,
    "no-sparse-arrays": 2,
    "no-template-curly-in-string": 1,
    "no-unexpected-multiline": 2,
    "no-unreachable": 2,
    "no-unsafe-finally": 2,
    "no-unsafe-negation": 2,
    "use-isnan": 2,
    "valid-jsdoc": [
      1,
      {
        "requireReturn": false,
        "prefer": {
          "arg": "param",
          "argument": "param",
          "returns": "return"
        },
        "preferType": {
          "Boolean": "boolean",
          "Function": "function",
          "Array": "array",
          "Set": "set",
          "Map": "map",
          "Number": "number",
          "Object": "object",
          "String": "string"
        }
      }
    ],
    "valid-typeof": [
      2,
      {
        "requireStringLiterals": true
      }
    ],
    "accessor-pairs": 1,
    "array-callback-return": 2,
    "block-scoped-var": 2,
    "class-methods-use-this": 1,
    "complexity": 0,
    "consistent-return": 0,
    "curly": [
      1,
      "all"
    ],
    "default-case": 2,
    "dot-location": [
      1,
      "property"
    ],
    "dot-notation": 1,
    "eqeqeq": [
      2,
      "always"
    ],
    "guard-for-in": 1,
    "no-alert": 2,
    "no-caller": 2,
    "no-case-declarations": 2,
    "no-div-regex": 1,
    "no-else-return": 1,
    "no-empty-pattern": 2,
    "no-eq-null": 2,
    "no-eval": 2,
    "no-extend-native": 0,
    "no-extra-bind": 2,
    "no-extra-label": 2,
    "no-fallthrough": 2,
    "no-floating-decimal": 2,
    "no-global-assign": 2,
    "no-implicit-coercion": 2,
    "no-implicit-globals": 0,
    "no-implied-eval": 2,
    "no-invalid-this": 0,
    "no-iterator": 2,
    "no-labels": 2,
    "no-lone-blocks": 2,
    "no-loop-func": 2,
    "no-magic-numbers": 0,
    "no-multi-spaces": [
      1,
      {
        "ignoreEOLComments": true
      }
    ],
    "no-multi-str": 2,
    "no-new": 1,
    "no-new-func": 2,
    "no-new-wrappers": 2,
    "no-octal": 2,
    "no-octal-escape": 2,
    "no-param-reassign": [
      2,
      {
        "props": false
      }
    ],
    "no-proto": 0,
    "no-redeclare": [
      2,
      {
        "builtinGlobals": true
      }
    ],
    "no-restricted-properties": 0,
    "no-return-assign": [
      2,
      "except-parens"
    ],
    "no-return-await": 1,
    "no-script-url": 2,
    "no-self-assign": [
      2,
      {
        "props": true
      }
    ],
    "no-self-compare": 2,
    "no-sequences": 2,
    "no-throw-literal": 1,
    "no-unmodified-loop-condition": 1,
    "no-unused-expressions": [
      2,
      {
        "allowTaggedTemplates": true
      }
    ],
    "no-unused-labels": 1,
    "no-useless-call": 1,
    "no-useless-concat": 1,
    "no-useless-escape": 1,
    "no-useless-return": 1,
    "no-void": 1,
    "no-warning-comments": 0,
    "no-with": 2,
    "prefer-promise-reject-errors": 0,
    "radix": 2,
    "require-await": 2,
    "vars-on-top": 2,
    "wrap-iife": [
      2,
      "inside",
      {
        "functionPrototypeMethods": true
      }
    ],
    "yoda": [
      2,
      "never",
      {
        "onlyEquality": true
      }
    ],
    "strict": 0,
    "init-declarations": 0,
    "no-catch-shadow": 2,
    "no-delete-var": 2,
    "no-label-var": 2,
    "no-restricted-globals": 0,
    "no-shadow": [
      2,
      {
        "builtinGlobals": true,
        "hoist": "all",
        "allow": [
          "event",
          "e",
          "error"
        ]
      }
    ],
    "no-shadow-restricted-names": 2,
    "no-undef": 1,
    "no-undef-init": 2,
    "no-undefined": 0,
    "no-unused-vars": [
      1,
      {
        "caughtErrors": "all",
        "args": "after-used",
        "ignoreRestSiblings": true
      }
    ],
    "no-use-before-define": 2,
    "callback-return": 0,
    "global-require": 0,
    "handle-callback-err": [
      1,
      "^.*(e|E)rr"
    ],
    "no-buffer-constructor": 2,
    "no-mixed-requires": 0,
    "no-new-require": 2,
    "no-path-concat": 2,
    "no-process-env": 0,
    "no-process-exit": 0,
    "no-restricted-modules": 0,
    "no-sync": 2,
    "array-bracket-newline": [
      1,
      {
        "multiline": true
      }
    ],
    "array-bracket-spacing": [
      1,
      "never"
    ],
    "array-element-newline": 0,
    "block-spacing": [
      1,
      "never"
    ],
    "brace-style": [
      1,
      "stroustrup",
      {
        "allowSingleLine": true
      }
    ],
    "camelcase": [
      1,
      {
        "properties": "never"
      }
    ],
    "capitalized-comments": 0,
    "comma-dangle": [
      1,
      "never"
    ],
    "comma-spacing": [
      1,
      {
        "before": false,
        "after": true
      }
    ],
    "comma-style": [
      1,
      "last"
    ],
    "computed-property-spacing": [
      1,
      "never"
    ],
    "consistent-this": [
      1,
      "that"
    ],
    "eol-last": 0,
    "func-call-spacing": [
      1,
      "never"
    ],
    "func-name-matching": [
      1,
      "always"
    ],
    "func-names": [
      1,
      "as-needed"
    ],
    "func-style": [
      1,
      "declaration",
      {
        "allowArrowFunctions": true
      }
    ],
    "id-blacklist": 0,
    "id-length": 0,
    "id-match": 0,
    "indent": [
      1,
      2,
      {
        "VariableDeclarator": {
          "var": 2,
          "let": 2,
          "const": 3
        },
        "FunctionExpression": {
          "body": 1,
          "parameters": "first"
        },
        "FunctionDeclaration": {
          "body": 1,
          "parameters": "first"
        },
        "MemberExpression": 1,
        "ArrayExpression": 1,
        "ObjectExpression": 1,
        "CallExpression": {
          "arguments": 1
        },
        "SwitchCase": 1,
        "outerIIFEBody": 1
      }
    ],
    "jsx-quotes": [
      1,
      "prefer-double"
    ],
    "key-spacing": [
      1,
      {
        "beforeColon": false,
        "afterColon": true,
        "mode": "strict"
      }
    ],
    "keyword-spacing": [
      1,
      {
        "before": true,
        "after": true
      }
    ],
    "line-comment-position": 0,
    "linebreak-style": 0,
    "lines-around-comment": 0,
    "max-depth": 0,
    "max-len": [
      2,
      {
        "code": 85,
        "ignoreComments": false,
        "ignoreTrailingComments": true,
        "ignoreTemplateLiterals": true,
        "ignoreRegExpLiterals": true,
        "ignoreStrings": true,
        "ignoreUrls": true,
        "tabWidth": 2
      }
    ],
    "max-lines": 0,
    "max-nested-callbacks": [
      1,
      5
    ],
    "max-params": [
      1,
      5
    ],
    "max-statements": [
      2,
      50
    ],
    "max-statements-per-line": [
      1,
      {
        "max": 4
      }
    ],
    "multiline-ternary": 0,
    "new-cap": [
      1,
      {
        "newIsCap": true,
        "capIsNew": false,
        "properties": false
      }
    ],
    "new-parens": 2,
    "newline-per-chained-call": 0,
    "no-array-constructor": 2,
    "no-bitwise": [
      1,
      {
        "allow": [
          "~",
          ">>>",
          ">>",
          "<<"
        ],
        "int32Hint": true
      }
    ],
    "no-continue": 0,
    "no-inline-comments": 0,
    "no-lonely-if": 2,
    "no-mixed-operators": 0,
    "no-mixed-spaces-and-tabs": 2,
    "no-multi-assign": 0,
    "no-multiple-empty-lines": [
      1,
      {
        "max": 2
      }
    ],
    "no-negated-condition": 0,
    "no-nested-ternary": 2,
    "no-new-object": 2,
    "no-plusplus": 0,
    "no-restricted-syntax": 0,
    "no-tabs": 0,
    "no-ternary": 0,
    "no-trailing-spaces": [
      1,
      {
        "skipBlankLines": false,
        "ignoreComments": true
      }
    ],
    "no-underscore-dangle": 0,
    "no-unneeded-ternary": [
      2,
      {
        "defaultAssignment": true
      }
    ],
    "no-whitespace-before-property": 1,
    "nonblock-statement-body-position": [
      1,
      "beside"
    ],
    "object-curly-newline": [
      1,
      {
        "multiline": true,
        "consistent": true
      }
    ],
    "object-curly-spacing": [
      1,
      "never"
    ],
    "object-property-newline": [
      1,
      {
        "allowMultiplePropertiesPerLine": true
      }
    ],
    "one-var": 0,
    "one-var-declaration-per-line": [
      1,
      "initializations"
    ],
    "operator-assignment": 0,
    "operator-linebreak": [
      1,
      "after"
    ],
    "padded-blocks": [
      1,
      "never"
    ],
    "padding-line-between-statements": [
      1,
      {
        "blankLine": "always",
        "prev": "*",
        "next": "return"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": "continue"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": "break"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": "function"
      },
      {
        "blankLine": "always",
        "prev": "function",
        "next": "*"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": "for"
      },
      {
        "blankLine": "always",
        "prev": "for",
        "next": "*"
      },
      {
        "blankLine": "always",
        "prev": [
          "const",
          "let",
          "var"
        ],
        "next": "*"
      },
      {
        "blankLine": "any",
        "prev": [
          "const",
          "let",
          "var"
        ],
        "next": [
          "const",
          "let",
          "var"
        ]
      },
      {
        "blankLine": "always",
        "prev": "import",
        "next": "*"
      },
      {
        "blankLine": "any",
        "prev": "import",
        "next": "import"
      },
      {
        "blankLine": "always",
        "prev": "for",
        "next": "*"
      },
      {
        "blankLine": "always",
        "prev": "directive",
        "next": "*"
      },
      {
        "blankLine": "always",
        "prev": "if",
        "next": "*"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": "if"
      },
      {
        "blankLine": "any",
        "prev": "if",
        "next": "if"
      }
    ],
    "quote-props": [
      1,
      "consistent-as-needed",
      {
        "numbers": true
      }
    ],
    "quotes": [
      1,
      "single",
      {
        "avoidEscape": true
      }
    ],
    "require-jsdoc": [
      1,
      {
        "require": {
          "FunctionDeclaration": false,
          "MethodDefinition": false,
          "ClassDeclaration": true,
          "ArrowFunctionExpression": false
        }
      }
    ],
    "semi": [
      1,
      "never"
    ],
    "semi-spacing": 0,
    "semi-style": 0,
    "sort-keys": 0,
    "sort-vars": 0,
    "space-before-blocks": [
      1,
      "always"
    ],
    "space-before-function-paren": [
      1,
      "always"
    ],
    "space-in-parens": [
      1,
      "never"
    ],
    "space-infix-ops": [
      1,
      {
        "int32Hint": true
      }
    ],
    "space-unary-ops": [
      1,
      {
        "words": true,
        "nonwords": false
      }
    ],
    "spaced-comment": [
      1,
      "always"
    ],
    "no-useless-constructor": 1,
    "no-useless-rename": 1,
    "no-var": 2,
    "object-shorthand": [
      1,
      "always"
    ],
    "switch-colon-spacing": [
      1,
      {
        "after": true,
        "before": false
      }
    ],
    "template-tag-spacing": [
      1,
      "never"
    ],
    "unicode-bom": [
      2,
      "never"
    ],
    "wrap-regex": 1,
    "arrow-body-style": [
      1,
      "as-needed"
    ],
    "arrow-parens": [
      1,
      "as-needed"
    ],
    "arrow-spacing": [
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      {
        "before": true,
        "after": true
      }
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    "constructor-super": 2,
    "generator-star-spacing": [
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      {
        "before": true,
        "after": false
      }
    ],
    "no-class-assign": 2,
    "no-confusing-arrow": [
      1,
      {
        "allowParens": true
      }
    ],
    "no-const-assign": 2,
    "no-dupe-class-members": 2,
    "no-duplicate-imports": 1,
    "no-new-symbol": 2,
    "no-restricted-imports": 0,
    "no-this-before-super": 2,
    "no-useless-computed-key": 1,
    "prefer-arrow-callback": 0,
    "prefer-const": [
      1,
      {
        "destructuring": "all"
      }
    ],
    "prefer-destructuring": 0,
    "prefer-numeric-literals": 0,
    "prefer-rest-params": 1,
    "prefer-spread": 1,
    "prefer-template": 1,
    "require-yield": 2,
    "rest-spread-spacing": [
      1,
      "never"
    ],
    "sort-imports": 0,
    "symbol-description": 1,
    "template-curly-spacing": [
      1,
      "never"
    ],
    "yield-star-spacing": [
      1,
      "after"
    ]
  }
}