.eslintrc.json

{
  "env": {
    "browser": true
  },
  "rules": {
    "block-scoped-var": "error",
    "comma-style": [
      "error",
      "last"
    ],
    "curly": [
      "error",
      "all"
    ],
    "dot-notation": [
      "error",
      {
        "allowKeywords": false
      }
    ],
    "eol-last": "error",
    "eqeqeq": [
      "error",
      "allow-null"
    ],
    "indent": ["error", 4],
    "new-cap": ["error", { "properties": false }],
    "no-caller": "error",
    "no-cond-assign": [
      "error",
      "except-parens"
    ],
    "no-debugger": "error",
    "no-empty": ["error", {"allowEmptyCatch": true}],
    "no-eval": "error",
    "no-extend-native": "error",
    "no-irregular-whitespace": "error",
    "no-iterator": "error",
    "no-loop-func": "error",
    "no-multi-str": "error",
    "no-new": "error",
    "no-proto": "error",
    "no-script-url": "error",
    "no-sequences": "error",
    "no-trailing-spaces": "error",
    "no-undef": "error",
    "no-unused-vars": "error",
    "no-with": "error",
    "quotes": [
      "error",
      "double"
    ],
    "semi": [
      "error",
      "always"
    ],
    "space-before-blocks": ["error", "always"],
    "space-before-function-paren": ["error", {"anonymous": "always", "named": "never"}],
    "space-infix-ops": "error",
    "space-unary-ops": [
      "error", {
        "words": true,
        "nonwords": false,
        "overrides": {
            "typeof": false
        }
    }],
    "strict": ["error", "safe"],
    "valid-typeof": "error",
    "wrap-iife": [
      "error",
      "inside"
    ]
  }
}