.eslintrc.json

{
    "extends": "eslint:recommended",
    "parserOptions": {
        "ecmaVersion": 2018,
        "sourceType": "module"
    },
    "env": {
        "browser": true,
        "node": true,
        "jest/globals": true
    },
    "globals": {
        "Promise": false
    },
    "plugins": ["jest"]
}