.eslintrc

{

    "parser": "babel-eslint",

    "plugins": [
        "flowtype"
    ],

    "env": {
        "browser": false,
        "node": true,
        "amd": true,
        "mocha": true,
        "es6": true
    },

    "ecmaFeatures": {
        "modules": true
    },

    "parserOptions": {
        "sourceType": "module"
    },

    "globals": {
        "window": true,
        "document": true,
        "Promise": false,
        "performance": true,
        "assert": true,
        "__TEST__": true,
        "__MINOR_VERSION__": true,
        "__MAJOR_VERSION__": true,
        "__FILE_NAME__": true,
        "__FILE_VERSION__": true,
        "__DEFAULT_LOG_LEVEL__": true,
        "__LEGACY_SUPPORT__": true,
        "__IE_POPUP_SUPPORT__": true,
        "__ALLOW_POSTMESSAGE_POPUP__": true
    },

    "fix": true,

    "rules": {
        // possible errors
        "comma-dangle": 2,
        "no-cond-assign": 2,
        "no-console": 0,
        "no-constant-condition": 0,
        "no-control-regex": 2,
        "no-debugger": 2,
        "no-dupe-args": 0,
        "no-dupe-keys": 2,
        "no-duplicate-case": 0,
        "no-empty-character-class": 2,
        "no-empty": 2,
        "no-ex-assign": 2,
        "no-extra-boolean-cast": 2,
        "no-extra-parens": 0,
        "no-extra-semi": 2,
        "no-func-assign": 2,
        "no-inner-declarations": [2, "functions"],
        "no-invalid-regexp": 2,
        "no-irregular-whitespace": 0,
        "no-negated-in-lhs": 2,
        "no-obj-calls": 2,
        "no-regex-spaces": 2,
        "no-sparse-arrays": 2,
        "no-unexpected-multiline": 0,
        "no-unreachable": 2,
        "quote-props": 0,
        "use-isnan": 2,
        "valid-jsdoc": 0,
        "valid-typeof": 2,

        // best practices
        "accessor-pairs": 0,
        "array-callback-return": 0,
        "block-scoped-var": 2,
        "complexity": [0, 10], // would love to turn this on someday
        "consistent-return": 0,
        "curly": [2, "all"],
        "default-case": 2,
        "dot-location": 0,
        "dot-notation": 2,
        "eqeqeq": 2,
        "guard-for-in": 0,
        "no-alert": 2,
        "no-caller": 2,
        "no-case-declarations": 0,
        "no-div-regex": 2,
        "no-else-return": 0,
        "no-empty-function": 2,
        "no-empty-pattern": 0,
        "no-eq-null": 2,
        "no-eval": 2,
        "no-extend-native": 2,
        "no-extra-bind": 2,
        "no-extra-label": 2,
        "no-fallthrough": 2,
        "no-floating-decimal": 2,
        "no-implicit-coercion": 0,
        "no-implicit-globals": 2,
        "no-implied-eval": 2,
        "no-invalid-this": 0,
        "no-iterator": 2,
        "no-labels": 2,
        "no-lone-blocks": 2,
        "no-loop-func": 0,
        "no-magic-numbers": 0,
        "no-multi-spaces": 0,
        "no-multi-str": 2,
        "no-native-reassign": 2,
        "no-new-func": 2,
        "no-new-wrappers": 2,
        "no-new": 2,
        "no-octal-escape": 2,
        "no-octal": 2,
        "no-param-reassign": 0,
        "no-process-env": 0,
        "no-proto": 2,
        "no-redeclare": 2,
        "no-return-assign": 2,
        "no-script-url": 2,
        "no-self-assign": 2,
        "no-self-compare": 2,
        "no-sequences": 2,
        "no-throw-literal": 2,
        "no-unmodified-loop-condition": 2,
        "no-unused-expressions": 2,
        "no-unused-labels": 2,
        "no-useless-call": 0,
        "no-useless-concat": 0,
        "no-void": 2,
        "no-warning-comments": 0,
        "no-with": 2,
        "radix": 2,
        "vars-on-top": 0,
        "wrap-iife": 2,
        "yoda": 2,

        // strict
        "strict": [2, "global"],

        // variables
        "init-declarations": 0,
        "no-catch-shadow": 2,
        "no-delete-var": 2,
        "no-label-var": 2,
        "no-restricted-globals": 0,
        "no-shadow-restricted-names": 2,
        "no-shadow": 2,
        "no-undef-init": 2,
        "no-undef": 2,
        "no-undefined": 0,
        "no-unused-vars": [2, {"vars": "all", "args": "none"}],
        "no-use-before-define": 2,

        // node.js
        "callback-return": 0,
        "global-require": 0,
        "handle-callback-err": 2,
        "no-mixed-requires": 2,
        "no-new-require": 2,
        "no-path-concat": 2,
        "no-process-exit": 2,
        "no-restricted-modules": 0,
        "no-sync": 0,

        // stylistic issues
        "array-bracket-spacing": 0,
        "block-spacing": 0,
        "brace-style": 0,
        "camelcase": 0,
        "comma-spacing": [2, {"before": false, "after": true}],
        "comma-style": [1, "last"],
        "computed-property-spacing": 0,
        "consistent-this": [2, "self"],
        "eol-last": 0,
        "func-names": 0,
        "func-style": [0, "declaration"],
        "id-blacklist": 0,
        "id-length": 0,
        "id-match": 0,
        "indent": [2, 4, {"SwitchCase": 1}],
        "jsx-quotes": 0,
        "key-spacing": 0,
        "keyword-spacing": 2,
        "linebreak-style": 0,
        "lines-around-comment": 0,
        "max-depth": [0, 4],
        "max-len": [0, 80, 4],
        "max-nested-callbacks": [0, 2],
        "max-params": [1, 5],
        "max-statements": 0,
        "new-cap": 2,
        "new-parens": 2,
        "newline-after-var": 0,
        "newline-before-return": 0,
        "newline-per-chained-call": 0,
        "no-array-constructor": 2,
        "no-bitwise": 2,
        "no-continue": 0,
        "no-inline-comments": 0,
        "no-lonely-if": 0,
        "no-mixed-spaces-and-tabs": [2, true],
        "no-multiple-empty-lines": 0,
        "no-negated-condition": 0,
        "no-nested-ternary": 2,
        "no-new-object": 2,
        "no-plusplus": 0,
        "no-restricted-syntax": 0,
        "no-spaced-func": 2,
        "no-ternary": 0,
        "no-trailing-spaces": 0,
        "no-underscore-dangle": 0,
        "no-unneeded-ternary": 0,
        "no-whitespace-before-property": 2,
        "object-curly-spacing": 0,
        "one-var": 0,
        "one-var-declaration-per-line": [1, "always"],
        "operator-assignment": 0,
        "operator-linebreak": 0,
        "padded-blocks": 0,
        "quotes": [2, "single", {"allowTemplateLiterals":true}],
        "require-jsdoc": 0,
        "semi-spacing": 2,
        "semi": 2,
        "sort-imports": 0,
        "sort-vars": 0,
        "space-before-blocks": [2, "always"],
        "space-before-function-paren": 0,
        "space-in-parens": 2,
        "space-infix-ops": 2,
        "space-unary-ops": [2, { "words": true, "nonwords": false }],
        "spaced-comment": 2,
        "wrap-regex": 2,

        // ES6

        // require braces in arrow function body
        "arrow-body-style": 0,
        // require parens in arrow function arguments
        "arrow-parens": 0,
        // require space before/after arrow functions arrow
        "arrow-spacing": 2,
        // verify super() callings in constructors
        "constructor-super": 2,
        // enforce the spacing around the * in generator functions
        "generator-star-spacing": 0,
        // disallow modifying variables of class declarations
        "no-class-assign": 2,
        "no-confusing-arrow": 2,
        // disallow modifying variables that are declared using const
        "no-const-assign": 2,
        // disallow duplicate name in class members
        "no-dupe-class-members": 2,
        "no-new-symbol": 2,
        "no-restricted-imports": 0,
        // disallow to use this/super before super() calling in constructors.
        "no-this-before-super": 2,
        "no-useless-constructor": 2,
        // require let or const instead of var
        "no-var": 1,
        // require method and property shorthand syntax for object literals
        "object-shorthand": 1,
        // suggest using arrow functions as callbacks
        "prefer-arrow-callback": 2,
        // suggest using of const declaration for variables that are never modified after declared
        "prefer-const": 0,
        "prefer-rest-params": 0,
        // suggest using Reflect methods where applicable
        "prefer-reflect": 0,
        // suggest using the spread operator instead of .apply()
        "prefer-spread": 0,
        // suggest using template literals instead of strings concatenation
        "prefer-template": 2,
        // disallow generator functions that do not have yield
        "require-yield": 2,
        "template-curly-spacing": 0,
        "yield-star-spacing": 0,

        "flowtype/boolean-style": [
            2,
            "boolean"
        ],
        "flowtype/define-flow-type": 1,
        "flowtype/delimiter-dangle": [
            2,
            "never"
        ],
        "flowtype/generic-spacing": [
            2,
            "never"
        ],
        "flowtype/no-primitive-constructor-types": 2,
        "flowtype/no-weak-types": [
            2,
            {
                "any": true,
                "Object": false,
                "Function": false
            }
        ],
        "flowtype/object-type-delimiter": [
            2,
            "comma"
        ],
        "flowtype/require-parameter-type": 0,
        "flowtype/require-return-type": [
            2,
            "always",
            {
                "annotateUndefined": "never",
                "excludeArrowFunctions": true
            }
        ],
        "flowtype/require-valid-file-annotation": 2,
        "flowtype/semi": [
            2,
            "always"
        ],
        "flowtype/space-after-type-colon": [
            2,
            "always"
        ],
        "flowtype/space-before-generic-bracket": [
            2,
            "never"
        ],
        "flowtype/space-before-type-colon": [
            2,
            "always"
        ],
        "flowtype/type-id-match": [
            2,
            "^([A-Z][a-z0-9]+)+$"
        ],
        "flowtype/union-intersection-spacing": [
            2,
            "always"
        ],
        "flowtype/use-flow-type": 1,
        "flowtype/valid-syntax": 1
    }

}