.eslintrc.json

{
  "env": {
    "browser": true,
    "jquery": true
  },
  "extends": [
    "eslint:recommended"
  ],
  "globals": {
    "bootstrap": "readonly",
    "FullCalendar": "readonly"
  },
  "parserOptions": {
  },
  "rules": {
    "arrow-spacing": "error",
    "block-spacing": "error",
    "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
    "indent": ["error", 2],
    "keyword-spacing": "error",
    "max-len": ["error", {"code": 120}],
    "no-trailing-spaces": "error",
    "quotes": ["error", "single", { "avoidEscape": true, "allowTemplateLiterals": true }],
    "space-before-blocks": "error",
    "space-infix-ops": ["error", { "int32Hint": false }],
    "no-unused-vars": ["error", { "vars": "local" }]
  },
  "overrides": [
    {
      "files": ["**/*.es6"],
      "env": {
        "es6": true
      },
      "extends": ["google"],
      "rules": {
        "comma-dangle": "off",
        "curly": ["error", "multi-or-nest"],
        "max-len": ["error", { "code": 120 }]
      }
    }
  ]
}