.eslintrc.json

{
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module"
  },
  "env": {
    "browser": true,
    "es6": true
  },
  "globals": {
    "currentPlayerId": true,
    "handlers": true,
    "http": true,
    "server": true,
    "log": true
  },
  "rules": {
    "no-throw-literal": "off",
    "brace-style": "error",
    "comma-spacing": "error",
    "comma-dangle": ["error", "always-multiline"],
    "eqeqeq": "error",
    "func-call-spacing": "error",
    "indent": [
      "error",
      2,
      {
        "MemberExpression": 1,
        "SwitchCase": 1,
        "VariableDeclarator": {
          "var": 2,
          "let": 2,
          "const": 3
        }
      }
    ],
    "key-spacing": "error",
    "keyword-spacing": "error",
    "no-array-constructor": "error",
    "no-extra-parens": "error",
    "no-extra-semi": "error",
    "no-multi-spaces": "error",
    "no-unused-vars": [
      "error",
      {
        "args": "none"
      }
    ],
    "no-useless-escape": "off",
    "no-whitespace-before-property": "error",
    "object-curly-spacing": [
      "error",
      "always"
    ],
    "object-shorthand": [
      "error",
      "methods"
    ],
    "semi": [
      "error",
      "always"
    ],
    "semi-spacing": "error",
    "space-before-blocks": "error",
    "space-before-function-paren": [
      "error",
      "never"
    ],
    "space-in-parens": "error",
    "space-infix-ops": "error",
    "no-console": "off",
    "max-nested-callbacks": [
      1,
      3
    ],
    "max-len": [
      1,
      200,
      2
    ],
    "max-params": [
      1,
      4
    ],
    "max-statements": [
      1,
      60
    ],
    "no-underscore-dangle": 0,
    "quotes": [
      "error",
      "single"
    ]
  }
}