.eslintrc.json

{
  "rules": {
    "no-with": 2,
    "template-curly-spacing": [
      "error",
      "always"
    ],
    "max-len": [
      2,
      250
    ],
    "no-undef": "off",
    "no-extra-semi": [
      "error"
    ],
    "no-empty": [
      "error"
    ],
    "multiline-comment-style": [
      "error",
      "starred-block"
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "no-unused-vars": [
      "error"
    ],
    "no-trailing-spaces": [
      "error"
    ],
    "no-console": [
      "warn",
      {
        "allow": [
          "warn",
          "error"
        ]
      }
    ],
    "indent": [
      2,
      4,
      {
        "SwitchCase": 1
      }
    ]
  },
  "env": {
    "es6": true,
    "jest": true,
    "node": true
  },
  "extends": [
    "eslint:recommended"
  ],
  "parserOptions": {
    "ecmaVersion": 9,
    "sourceType": "module"
  }
}