.eslintrc.json

{
  "env": {
      "es6": true,
      "browser": true
  },
"globals": {
  "ENV": true
},
"parserOptions": {
  "sourceType": "module"
},
  "extends": "eslint:recommended",
  "rules": {
      "indent": [
          "error",
          2
      ],
      "linebreak-style": [
          "error",
          "unix"
      ],
      "quotes": [
          "error",
          "single"
      ],
      "semi": [
          "error",
          "always"
      ],
      "eqeqeq": [
          "error",
          "always"
      ],
      "space-infix-ops": [
          "error",
          {"int32Hint": false}
      ],
      "max-len": [
          "error",
          80,
          2
      ],
      "prefer-const": "error",
      "no-const-assign": "error",
      "no-var": "error",
      "no-new-object": "error",
      "no-array-constructor": "error",
      "prefer-arrow-callback": "error",
      "brace-style": "error"
  }
}