.eslintrc.json

{
  "env": {
    "es6": true,
    "jest": true
  },
  "extends": [
    "eslint:recommended"
  ],
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 7,
    "sourceType": "module",
    "ecmaFeatures": {
      "arrowFunctions": true,
      "binaryLiterals": true,
      "blockBindings": true,
      "classes": true,
      "defaultParams": true,
      "destructuring": true,
      "forOf": true,
      "generators": true,
      "jsx": true,
      "modules": true,
      "objectLiteralComputedProperties": true,
      "objectLiteralDuplicateProperties": true,
      "objectLiteralShorthandMethods": true,
      "objectLiteralShorthandProperties": true,
      "octalLiterals": true,
      "regexUFlag": true,
      "regexYFlag": true,
      "spread": true,
      "superInFunctions": true,
      "templateStrings": true,
      "unicodeCodePointEscapes": true,
      "globalReturn": true,
      "experimentalObjectRestSpread": true
    }
  },
  "plugins": [
    "flowtype"
  ],
  "globals": {
    "process": false
  },
  "rules": {
    "eqeqeq": [ "error", "always" ],
    "linebreak-style": [ "error", "unix" ],
    "no-unused-vars": ["error", { "argsIgnorePattern": "^_+$" }],
    "quotes": [ "error", "single", { "avoidEscape": true } ],
    "semi": [ "error", "always" ],
    "flowtype/boolean-style": [ 2, "boolean" ],
    "flowtype/define-flow-type": 1,
    "flowtype/delimiter-dangle": 0,
    "flowtype/generic-spacing": [ 2, "never" ],
    "flowtype/no-weak-types": 0,
    "flowtype/require-parameter-type": 0,
    "flowtype/require-return-type": 0,
    "flowtype/require-valid-file-annotation": 0,
    "flowtype/semi": 0,
    "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": 0,
    "flowtype/union-intersection-spacing": [ 2, "always" ],
    "flowtype/use-flow-type": 1,
    "flowtype/valid-syntax": 1
  },
  "settings": {
    "flowtype": {
      "onlyFilesWithFlowAnnotation": false
    }
  }
}