.eslintrc.json

{
    "env": {
        "es6": true,
        "node": true
    },
    "parserOptions": {
        "sourceType": "script",
        "ecmaVersion": 2018
    },
    "rules": {
        "accessor-pairs": "off",
        "array-callback-return": "error",
        "block-scoped-var": "error",
        "complexity": [
            "off",
            11
        ],
        "class-methods-use-this": [
            "warn"
        ],
        "consistent-return": "warn",
        "curly": [
            "warn",
            "multi-or-nest",
            "consistent"
        ],
        "default-case": [
            "error",
            {
                "commentPattern": "^no default$"
            }
        ],
        "dot-notation": [
            "error",
            {
                "allowKeywords": true
            }
        ],
        "dot-location": [
            "error",
            "property"
        ],
        "eqeqeq": [
            "warn",
            "allow-null"
        ],
        "guard-for-in": "error",
        "no-alert": "warn",
        "no-caller": "error",
        "no-case-declarations": "error",
        "no-div-regex": "off",
        "no-else-return": "warn",
        "no-empty-function": [
            "warn",
            {
                "allow": [
                    "arrowFunctions",
                    "methods",
                    "getters"
                ]
            }
        ],
        "no-empty-pattern": "error",
        "no-eq-null": "off",
        "no-eval": "error",
        "no-extend-native": "error",
        "no-extra-bind": "error",
        "no-extra-label": "error",
        "no-fallthrough": "error",
        "no-floating-decimal": "error",
        "no-global-assign": [
            "error",
            {
                "exceptions": []
            }
        ],
        "no-native-reassign": "off",
        "no-implicit-coercion": [
            "off",
            {
                "boolean": false,
                "number": true,
                "string": true,
                "allow": []
            }
        ],
        "no-implicit-globals": "off",
        "no-implied-eval": "error",
        "no-invalid-this": "off",
        "no-iterator": "error",
        "no-labels": [
            "error",
            {
                "allowLoop": false,
                "allowSwitch": false
            }
        ],
        "no-lone-blocks": "error",
        "no-loop-func": "error",
        "no-magic-numbers": [
            "off",
            {
                "ignore": [],
                "ignoreArrayIndexes": true,
                "enforceConst": true,
                "detectObjects": false
            }
        ],
        "no-multi-spaces": "warn",
        "no-multi-str": "error",
        "no-new": "error",
        "no-new-func": "error",
        "no-new-wrappers": "error",
        "no-octal": "error",
        "no-octal-escape": "error",
        "no-param-reassign": [
            "warn",
            {
                "props": false
            }
        ],
        "no-proto": "error",
        "no-redeclare": "error",
        "no-restricted-properties": [
            "error",
            {
                "object": "arguments",
                "property": "callee",
                "message": "arguments.callee is deprecated"
            },
            {
                "property": "__defineGetter__",
                "message": "Please use Object.defineProperty instead."
            },
            {
                "property": "__defineSetter__",
                "message": "Please use Object.defineProperty instead."
            },
            {
                "object": "Math",
                "property": "pow",
                "message": "Use the exponentiation operator (**) instead."
            }
        ],
        "no-return-assign": "error",
        "no-return-await": "error",
        "no-script-url": "error",
        "no-self-assign": "error",
        "no-self-compare": "error",
        "no-sequences": "error",
        "no-throw-literal": "error",
        "no-unmodified-loop-condition": "off",
        "no-unused-expressions": [
            "error",
            {
                "allowShortCircuit": false,
                "allowTernary": false
            }
        ],
        "no-unused-labels": "error",
        "no-useless-call": "off",
        "no-useless-concat": "error",
        "no-useless-escape": "error",
        "no-useless-return": "error",
        "no-void": "error",
        "no-warning-comments": [
            "off",
            {
                "terms": [
                    "todo",
                    "fixme",
                    "xxx"
                ],
                "location": "start"
            }
        ],
        "no-with": "error",
        "radix": "error",
        "vars-on-top": "error",
        "wrap-iife": [
            "error",
            "outside",
            {
                "functionPrototypeMethods": false
            }
        ],
        "yoda": "error",
        "no-mixed-requires": "warn",
        "callback-return": "off",
        "global-require": "error",
        "handle-callback-err": "off",
        "no-new-require": "error",
        "no-path-concat": "error",
        "no-process-env": "off",
        "no-process-exit": "off",
        "no-restricted-modules": "off",
        "no-sync": "off",
        "arrow-body-style": [
            "warn",
            "as-needed"
        ],
        "arrow-parens": [
            "error",
            "as-needed"
        ],
        "arrow-spacing": [
            "error",
            {
                "before": true,
                "after": true
            }
        ],
        "constructor-super": "error",
        "generator-star-spacing": [
            "error",
            {
                "before": false,
                "after": true
            }
        ],
        "no-class-assign": "error",
        "no-confusing-arrow": [
            "error",
            {
                "allowParens": true
            }
        ],
        "no-const-assign": "error",
        "no-dupe-class-members": "error",
        "no-duplicate-imports": "error",
        "no-new-symbol": "error",
        "no-restricted-imports": "off",
        "no-this-before-super": "error",
        "no-useless-computed-key": "error",
        "no-useless-constructor": "error",
        "no-useless-rename": [
            "error",
            {
                "ignoreDestructuring": false,
                "ignoreImport": false,
                "ignoreExport": false
            }
        ],
        "no-var": "error",
        "object-shorthand": [
            "warn",
            "always",
            {
                "ignoreConstructors": false,
                "avoidQuotes": true
            }
        ],
        "prefer-arrow-callback": [
            "warn",
            {
                "allowNamedFunctions": false,
                "allowUnboundThis": true
            }
        ],
        "prefer-const": [
            "error",
            {
                "destructuring": "any",
                "ignoreReadBeforeAssign": true
            }
        ],
        "prefer-numeric-literals": "error",
        "prefer-reflect": "off",
        "prefer-rest-params": "warn",
        "prefer-spread": "error",
        "prefer-template": "warn",
        "require-yield": "error",
        "rest-spread-spacing": [
            "error",
            "never"
        ],
        "sort-imports": [
            "off",
            {
                "ignoreCase": false,
                "ignoreMemberSort": false,
                "memberSyntaxSortOrder": [
                    "none",
                    "all",
                    "multiple",
                    "single"
                ]
            }
        ],
        "symbol-description": "warn",
        "template-curly-spacing": "error",
        "yield-star-spacing": [
            "error",
            "after"
        ],
        "comma-dangle": [
            "warn",
            "never"
        ],
        "no-cond-assign": [
            "error",
            "always"
        ],
        "no-console": "warn",
        "no-constant-condition": "warn",
        "no-control-regex": "error",
        "no-debugger": "error",
        "no-dupe-args": "error",
        "no-dupe-keys": "error",
        "no-duplicate-case": "error",
        "no-empty": "warn",
        "no-empty-character-class": "error",
        "no-ex-assign": "error",
        "no-extra-boolean-cast": "error",
        "no-extra-parens": [
            "off",
            "all",
            {
                "conditionalAssign": true,
                "nestedBinaryExpressions": false,
                "returnAssign": false
            }
        ],
        "no-extra-semi": "error",
        "no-func-assign": "error",
        "no-inner-declarations": "error",
        "no-invalid-regexp": "error",
        "no-irregular-whitespace": "error",
        "no-obj-calls": "error",
        "no-prototype-builtins": "error",
        "no-regex-spaces": "error",
        "no-sparse-arrays": "error",
        "no-template-curly-in-string": "error",
        "no-unexpected-multiline": "error",
        "no-unsafe-finally": "error",
        "no-unsafe-negation": "error",
        "no-negated-in-lhs": "off",
        "use-isnan": "error",
        "valid-jsdoc": "off",
        "valid-typeof": [
            "error",
            {
                "requireStringLiterals": true
            }
        ],
        "array-bracket-spacing": [
            "error",
            "never"
        ],
        "block-spacing": [
            "error",
            "always"
        ],
        "brace-style": [
            "warn",
            "stroustrup",
            {
                "allowSingleLine": false
            }
        ],
        "camelcase": [
            "warn",
            {
                "properties": "never"
            }
        ],
        "comma-spacing": [
            "error",
            {
                "before": false,
                "after": true
            }
        ],
        "comma-style": [
            "error",
            "last"
        ],
        "computed-property-spacing": [
            "error",
            "never"
        ],
        "consistent-this": "off",
        "eol-last": [
            "error",
            "always"
        ],
        "func-call-spacing": [
            "error",
            "never"
        ],
        "func-name-matching": [
            "off",
            "always",
            {
                "includeCommonJSModuleExports": false
            }
        ],
        "func-names": "warn",
        "func-style": [
            "off",
            "expression"
        ],
        "id-blacklist": "off",
        "id-length": "off",
        "id-match": "off",
        "indent": [
            "warn",
            "tab",
            {
                "SwitchCase": 1,
                "VariableDeclarator": 1,
                "outerIIFEBody": 1,
                "FunctionDeclaration": {
                    "parameters": 1,
                    "body": 1
                },
                "FunctionExpression": {
                    "parameters": 1,
                    "body": 1
                }
            }
        ],
        "jsx-quotes": [
            "off",
            "prefer-double"
        ],
        "key-spacing": [
            "error",
            {
                "beforeColon": false,
                "afterColon": true
            }
        ],
        "keyword-spacing": [
            "error",
            {
                "before": true,
                "after": true,
                "overrides": {
                    "return": {
                        "after": true
                    },
                    "throw": {
                        "after": true
                    },
                    "case": {
                        "after": true
                    }
                }
            }
        ],
        "line-comment-position": [
            "off",
            {
                "position": "above",
                "ignorePattern": "",
                "applyDefaultPatterns": true
            }
        ],
        "linebreak-style": [
            "error",
            "unix"
        ],
        "lines-around-comment": [
            "warn",
            {
                "beforeBlockComment": true,
                "afterBlockComment": false,
                "beforeLineComment": true,
                "afterLineComment": false,
                "allowBlockStart": true,
                "allowObjectStart": true,
                "allowArrayStart": true
            }
        ],
        "lines-around-directive": [
            "warn",
            {
                "before": "never",
                "after": "always"
            }
        ],
        "max-depth": [
            "off",
            4
        ],
        "max-len": [
            "warn",
            120,
            2,
            {
                "ignoreUrls": true,
                "ignoreComments": false,
                "ignoreRegExpLiterals": true,
                "ignoreStrings": true,
                "ignoreTemplateLiterals": true
            }
        ],
        "max-lines": [
            "off",
            {
                "max": 300,
                "skipBlankLines": true,
                "skipComments": true
            }
        ],
        "max-nested-callbacks": "off",
        "max-params": [
            "off",
            3
        ],
        "max-statements": [
            "off",
            10
        ],
        "max-statements-per-line": [
            "off",
            {
                "max": 1
            }
        ],
        "multiline-ternary": [
            "off",
            "never"
        ],
        "new-cap": [
            "error",
            {
                "newIsCap": true,
                "newIsCapExceptions": [],
                "capIsNew": false,
                "capIsNewExceptions": [
                    "Immutable.Map",
                    "Immutable.Set",
                    "Immutable.List"
                ]
            }
        ],
        "new-parens": "error",
        "newline-after-var": "off",
        "newline-before-return": "off",
        "newline-per-chained-call": [
            "error",
            {
                "ignoreChainWithDepth": 4
            }
        ],
        "no-array-constructor": "error",
        "no-bitwise": "error",
        "no-continue": "off",
        "no-inline-comments": "off",
        "no-lonely-if": "error",
        "no-mixed-operators": [
            "warn",
            {
                "groups": [
                    [
                        "+",
                        "-",
                        "*",
                        "/",
                        "%",
                        "**"
                    ],
                    [
                        "&",
                        "|",
                        "^",
                        "~",
                        "<<",
                        ">>",
                        ">>>"
                    ],
                    [
                        "==",
                        "!=",
                        "===",
                        "!==",
                        ">",
                        ">=",
                        "<",
                        "<="
                    ],
                    [
                        "&&",
                        "||"
                    ],
                    [
                        "in",
                        "instanceof"
                    ]
                ],
                "allowSamePrecedence": false
            }
        ],
        "no-mixed-spaces-and-tabs": "warn",
        "no-multiple-empty-lines": [
            "warn",
            {
                "max": 2,
                "maxEOF": 1
            }
        ],
        "no-negated-condition": "off",
        "no-nested-ternary": "warn",
        "no-new-object": "error",
        "no-plusplus": [
            "warn",
            {
                "allowForLoopAfterthoughts": true
            }
        ],
        "no-restricted-syntax": [
            "error",
            "ForInStatement",
            "LabeledStatement",
            "WithStatement"
        ],
        "no-spaced-func": "error",
        "no-ternary": "off",
        "no-trailing-spaces": "warn",
        "no-underscore-dangle": [
            "off",
            {
                "allowAfterThis": true
            }
        ],
        "no-unneeded-ternary": [
            "error",
            {
                "defaultAssignment": false
            }
        ],
        "no-whitespace-before-property": "error",
        "object-curly-spacing": [
            "warn",
            "always"
        ],
        "object-curly-newline": [
            "off",
            {
                "ObjectExpression": {
                    "minProperties": 0,
                    "multiline": true
                },
                "ObjectPattern": {
                    "minProperties": 0,
                    "multiline": true
                }
            }
        ],
        "object-property-newline": [
            "error",
            {
                "allowMultiplePropertiesPerLine": true
            }
        ],
        "one-var": [
            "error",
            "never"
        ],
        "one-var-declaration-per-line": [
            "error",
            "always"
        ],
        "operator-assignment": [
            "error",
            "always"
        ],
        "operator-linebreak": "off",
        "padded-blocks": [
            "off",
            "never"
        ],
        "quote-props": [
            "error",
            "as-needed",
            {
                "keywords": false,
                "unnecessary": true,
                "numbers": false
            }
        ],
        "quotes": [
            "warn",
            "single",
            {
                "avoidEscape": true
            }
        ],
        "require-jsdoc": [
            "warn",
            {
                "require": {
                    "FunctionDeclaration": false,
                    "MethodDefinition": true,
                    "ClassDeclaration": false,
                    "ArrowFunctionExpression": false
                }
            }
        ],
        "semi": [
            "error",
            "always"
        ],
        "semi-spacing": [
            "error",
            {
                "before": false,
                "after": true
            }
        ],
        "sort-keys": [
            "off",
            "asc",
            {
                "caseSensitive": false,
                "natural": true
            }
        ],
        "sort-vars": "off",
        "space-before-blocks": "error",
        "space-before-function-paren": [
            "error",
            {
                "anonymous": "always",
                "named": "never",
                "asyncArrow": "always"
            }
        ],
        "space-in-parens": [
            "error",
            "never"
        ],
        "space-infix-ops": "error",
        "space-unary-ops": [
            "error",
            {
                "words": true,
                "nonwords": false,
                "overrides": {}
            }
        ],
        "spaced-comment": [
            "error",
            "always",
            {
                "line": {
                    "exceptions": [
                        "-",
                        "+"
                    ],
                    "markers": [
                        "=",
                        "!"
                    ]
                },
                "block": {
                    "exceptions": [
                        "-",
                        "+"
                    ],
                    "markers": [
                        "=",
                        "!"
                    ],
                    "balanced": false
                }
            }
        ],
        "unicode-bom": [
            "error",
            "never"
        ],
        "wrap-regex": "off",
        "init-declarations": "off",
        "no-catch-shadow": "off",
        "no-delete-var": "error",
        "no-label-var": "error",
        "no-restricted-globals": "off",
        "no-shadow": "error",
        "no-shadow-restricted-names": "error",
        "no-undef": "error",
        "no-undef-init": "error",
        "no-undefined": "off",
        "no-unused-vars": [
            "warn",
            {
                "vars": "local",
                "args": "after-used"
            }
        ],
        "no-use-before-define": "error",
        "strict": [
            "error",
            "global"
        ]
    }
}