.eslintrc.json

{
  "extends": ["eslint:recommended", "plugin:prettier/recommended"],
  "parserOptions": {
    "ecmaVersion": 12,
    "sourceType": "module"
  },
  "plugins": ["jest"],
  "rules": {
    "no-var": 2,
    "prefer-arrow-callback": 2
  },
  "overrides": [
    {
      "files": ["*.ts", "*.tsx"],
      "parser": "@typescript-eslint/parser",
      "plugins": ["@typescript-eslint"],
      "extends": ["plugin:@typescript-eslint/recommended"],
      "rules": {
        "@typescript-eslint/ban-ts-comment": 0,
        "@typescript-eslint/ban-types": 1,
        "@typescript-eslint/no-empty-function": 1,
        "@typescript-eslint/no-var-requires": 0,
        "@typescript-eslint/member-ordering": 1
      }
    }
  ],
  "env": {
    "browser": false,
    "node": true,
    "es6": true,
    "jest/globals": true
  },
  "globals": { "google": "readonly" }
}