.eslintrc.json

{
  "env": {
    "commonjs": true,
    "es6": true,
    "node": true,
    "jest": true
  },
  "extends": ["google"],
  "globals": {
    "Atomics": "readonly",
    "SharedArrayBuffer": "readonly"
  },
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 2018,
    "sourceType": "module",
    "allowImportExportEverywhere": true
  },
  "rules": {
    "object-curly-spacing": ["error", "always"],
    "max-len": ["error", { "code": 140 }],
    "indent": ["error", 2, { "SwitchCase": 1 }],
    "require-jsdoc": "off",
    "space-before-function-paren": [
      "error",
      {
        "anonymous": "always",
        "named": "never",
        "asyncArrow": "always"
      }
    ],
    "arrow-parens": ["error", "always"],
    "quote-props": ["error", "as-needed"],
    "no-undef": "error",
    "no-const-assign": "error",
    "operator-linebreak": "off",
    "no-dupe-keys": "error"
  }
}