.eslintrc

{
  "plugins": ["mocha"],
  "extends": ["eslint:recommended", "google"],
  "parserOptions": {
    "ecmaVersion": 8,
    "ecmaFeatures": {
      "jsx": true
    },
    "sourceType": "module"
  },
  "rules": {
    "valid-jsdoc": [ 2, {
      "requireReturn": true,
      "requireReturnDescription": true,
      "requireParamDescription": true,
      "prefer": {
        "return": "return"
      }
    }],
    "comma-dangle": 0,
    "curly": 2,
    "semi": [2, "always"],
    "no-console": 0,
    "no-debugger": 2,
    "no-extra-semi": 2,
    "no-constant-condition": 2,
    "no-alert": 2,
    "one-var-declaration-per-line": [2, "always"],
    "operator-linebreak": [
      2,
      "after"
    ],
    "max-len": [
      2,
      240
    ],
    "indent": [
      2,
      2,
      {
        "SwitchCase": 1
      }
    ],
    "quotes": [
      2,
      "single",
      {
        "avoidEscape": true
      }
    ],
    "no-multi-str": 2,
    "no-mixed-spaces-and-tabs": 2,
    "no-trailing-spaces": 2,
    "space-unary-ops": [
      2,
      {
        "nonwords": false,
        "overrides": {}
      }
    ],
    "one-var": [
      2,
      {
        "uninitialized": "always",
        "initialized": "never"
      }
    ],
    "no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
    "keyword-spacing": [
      2,
      {}
    ],
    "space-infix-ops": 2,
    "space-before-blocks": [
      2,
      "always"
    ],
    "eol-last": 2,
    "space-in-parens": [
      2,
      "never"
    ],
    "no-multiple-empty-lines": 2,
    "no-multi-spaces": 2,
    "key-spacing": [
      2,
      {
        "beforeColon": false,
        "afterColon": true
      }
    ]
  },
  "env": {
    "browser": true,
    "node": true,
    "es6": true,
    "mocha": true
  },
  "globals": {
    "-": 0
  }
}