.eslintrc.json

{
  "extends": ["eslint:recommended", "prettier"],
  "plugins": ["compat"],
  "env": {
    "browser": true,
    "mocha": true,
    "node": true
  },
  "parser": "@babel/eslint-parser",
  "rules": {
    "func-names": "off",
    "no-underscore-dangle": "off",
    "no-prototype-builtins": "off",
    "no-param-reassign": "off",
    "consistent-return": "off",
    "vars-on-top": "off",
    "compat/compat": "error",
    "no-var": 0,
    "object-shorthand": 0,
    "prefer-template": 0,
    "prefer-arrow-callback": 0,
    "no-plusplus": 0,
    "import/newline-after-import": 0,
    "no-useless-return": 0,
    "import/no-mutable-exports": 0,
    "import/first": 0,
    "prefer-spread": 0,
    "prefer-rest-params": 0,
    "lines-around-directive": 0,
    "valid-typeof": 0,
    "radix": "off"
  },
  "settings": {
    "polyfills": ["Object.assign"]
  }
}