.eslintrc.json

{
  "parser": "babel-eslint",
  "extends": "eslint:recommended",
  "env": {
    "node": true,
    "es6": true,
    "browser": true,
    "mocha": true,
    "jquery": true
  },
  "plugins": ["flowtype", "mocha"],
  "parserOptions": {
    "ecmaVersion": 2017,
    "sourceType": "module"
  },
  "rules": {
    "semi":  "off",
    "camelcase": "off",
    "consistent-return": "off",
    "curly": "off",
    "mocha/no-exclusive-tests": "error",
    "max-len": ["error", 110, 2],
    "new-cap": "off",
    "no-case-declarations": "off",
    "no-cond-assign": "off",
    "no-confusing-arrow": "error",
    "no-console": "off",
    "no-constant-condition": "off",
    "no-empty": "off",
    "no-fallthrough": "off",
    "no-inner-declarations": "off",
    "no-labels": "off",
    "no-loop-func": "off",
    "no-process-exit": "off",
    "no-return-assign": "off",
    "no-shadow": "off",
    "no-underscore-dangle": "off",
    "no-unreachable": "off",
    "no-use-before-define": "off",
    "no-var": "error",
    "prefer-const": "off",
    "strict": "off",
    "flowtype/define-flow-type": "warn",
    "flowtype/use-flow-type": "warn"
  },
  "globals": {
    "Iterator": true,
    "$Keys": true
  }
}