.eslintrc

{
  "ecmaFeatures": {
    "arrowFunctions": true,
    "binaryLiterals": false,
    "blockBindings": true,
    "classes": true,
    "defaultParams": true,
    "destructuring": true,
    "forOf": true,
    "generators": true,
    "modules": false,
    "objectLiteralComputedProperties": true,
    "objectLiteralDuplicateProperties": false,
    "objectLiteralShorthandMethods": true,
    "objectLiteralShorthandProperties": true,
    "octalLiterals": false,
    "regexUFlag": false,
    "regexYFlag": false,
    "restParams": true,
    "spread": true,
    "superInFunctions": true,
    "templateStrings": true,
    "unicodePointEscapes": true,
    "globalReturn": false,
    "jsx": true
  },
  "env": {
    "browser": true,
    "node": true
  },
  "parser": "babel-eslint",
  "plugins": [
    "flowtype",
    "flowtype-errors"
  ],
  "rules": {

    /*Possible Errors */
    "comma-dangle": [1, "always-multiline"],
    "no-cond-assign": [1, "except-parens"],
    "no-console": 0,
    "no-constant-condition": 1,
    "no-control-regex": 1,
    "no-debugger": 1,
    "no-dupe-args": 1,
    "no-dupe-keys": 1,
    "no-duplicate-case": 0,
    "no-empty-character-class": 1,
    "no-empty": 1,
    "no-ex-assign": 1,
    "no-extra-boolean-cast": 1,
    "no-extra-parens": 0,
    "no-extra-semi": 1,
    "no-func-assign": 1,
    "no-inner-declarations": [1, "functions"],
    "no-invalid-regexp": 1,
    "no-irregular-whitespace": 1,
    "no-negated-in-lhs": 1,
    "no-obj-calls": 1,
    "no-regex-spaces": 1,
    "no-reserved-keys": 0,
    "no-sparse-arrays": 1,
    "no-unexpected-multiline": 1,
    "no-unreachable": 1,
    "use-isnan": 1,
    "valid-jsdoc": 1,
    "valid-typeof": 1,

    /* Best Practices */
    "accessor-pairs": 0,
    "block-scoped-var": 0, // see Babel section
    "complexity": 0,
    "consistent-return": 1,
    "curly": [1, "multi-line"],
    "default-case": 0,
    "dot-notation": [1, { "allowKeywords": true, "allowPattern": "" }],
    "dot-location": [1, "property"],
    "eqeqeq": 1,
    "guard-for-in": 0,
    "no-alert": 1,
    "no-caller": 1,
    "no-div-regex": 1,
    "no-else-return": 1,
    "no-eq-null": 0,
    "no-eval": 1,
    "no-extend-native": 1,
    "no-extra-bind": 1,
    "no-fallthrough": 0,
    "no-floating-decimal": 1,
    "no-implied-eval": 1,
    "no-iterator": 1,
    "no-labels": 1,
    "no-lone-blocks": 1,
    "no-loop-func": 1,
    "no-multi-spaces": 1,
    "no-multi-str": 1,
    "no-native-reassign": 1,
    "no-new-func": 1,
    "no-new-wrappers": 1,
    "no-new": 1,
    "no-octal-escape": 1,
    "no-octal": 1,
    "no-param-reassign": 0,
    "no-process-env": 0,
    "no-proto": 1,
    "no-redeclare": 1,
    "no-return-assign": 1,
    "no-script-url": 1,
    "no-self-compare": 1,
    "no-sequences": 1,
    "no-throw-literal": 1,
    "no-unused-expressions": 0,
    "no-void": 0,
    "no-warning-comments": [1, { "terms": ["tofix"], "location": "start" }],
    "no-with": 1,
    "radix": 1,
    "vars-on-top": 1,
    "wrap-iife": [1, "inside"],
    "yoda": [1, "never"],

    /* Strict Mode */
    /* ("strict": [1, "never"], */

    /* Variables */
    "no-catch-shadow": 0,
    "no-delete-var": 1,
    "no-label-var": 1,
    "no-shadow-restricted-names": 1,
    "no-shadow": 1,
    "no-undef-init": 1,
    "no-undef": 1,
    /* "no-undefined": 1, */
    "no-unused-vars": [1, { "vars": "local", "args": "none" }],
    "no-use-before-define": 1,

    /* Node.js */
    "handle-callback-err": 1,
    "no-mixed-requires": 1,
    "no-new-require": 1,
    "no-path-concat": 1,
    "no-restricted-modules": [1, ""], // add any unwanted Node.js core modules
    /* "no-sync": 1, */

    /* Stylistic Issues */
    "array-bracket-spacing": [1, "never"],
    "brace-style": [1, "stroustrup", { "allowSingleLine": true }],
    "camelcase": [1, { "properties": "always" }],
    "comma-spacing": [1, { "before": false, "after": true }],
    "comma-style": [1, "last"],
    "computed-property-spacing": 0,
    "consistent-this": 0,
    "eol-last": 1,
    "func-names": 1,
    "func-style": 0,
    "indent": [1, 2],
    "key-spacing": [1, { "beforeColon": false, "afterColon": true }],
    "linebreak-style": 0,
    "max-nested-callbacks": [0, 3],
    "new-cap": 0, // see Babel section
    "new-parens": 1,
    "newline-after-var": 0,
    "no-array-constructor": 1,
    "no-continue": 1,
    "no-inline-comments": 0,
    "no-lonely-if": 1,
    "no-mixed-spaces-and-tabs": 1,
    "no-multiple-empty-lines": [1, { "max": 1 }],
    "no-nested-ternary": 0,
    "no-new-object": 1,
    "no-spaced-func": 1,
    "no-ternary": 0,
    "no-trailing-spaces": 1,
    "no-underscore-dangle": 0,
    "no-unneeded-ternary": 1,
    "object-curly-spacing": 0, // see Babel section
    "one-var": [1, "never"],
    "operator-assignment": [1, "never"],
    "padded-blocks": [0, "never"],
    "quote-props": [0, "as-needed"],
    "quotes": [1, "single"],
    "semi-spacing": [1, { "before": false, "after": true }],
    "semi": [1, "always"],
    "sort-vars": 0,
    "space-after-keywords": 0,
    "space-before-blocks": [1, "always"],
    "space-before-function-paren": [1, "never"],
    "space-in-parens": [1, "never"],
    "space-infix-ops": 1,
    "space-unary-ops": 0,
    "spaced-comment": [1, "always"],
    "wrap-regex": 1,

    /* ECMAScript 6 */
    "constructor-super": 1,
    "generator-star-spacing": 0, // see Babel section
    "no-this-before-super": 1,
    "no-var": 1,
    "object-shorthand": 0, // see Babel section
    "prefer-const": 1,

    /* Legacy */
    "max-depth": [0, 3],
    "max-len": [1, 121, 2],
    "max-params": 0,
    "max-statements": 0,
    "no-bitwise": [1, { "int32Hint": true }],

    /* Flow Types */
    "flowtype/boolean-style": [2,"boolean"],
    "flowtype/define-flow-type": 1,
    "flowtype/delimiter-dangle": [2,"never"],
    "flowtype/generic-spacing": [2,"never"],
    /* "flowtype/no-weak-types": 2, */
    "flowtype/require-parameter-type": 2,
    "flowtype/require-return-type": [2,"always",{ "annotateUndefined": "never"}],
    "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,"never"],
    "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,

    /* Flow Type Errors */
    "flowtype-errors/show-errors": 2
  },
  "settings": {
    "flowtype": {
      "onlyFilesWithFlowAnnotation": true
    }
  }
}