.eslintrc.json

{
    "env": {
        "browser": true,
        "es6": true
    },
    "extends": [
        "airbnb-base"
    ],
    "globals": {
        "Atomics": "readonly",
        "SharedArrayBuffer": "readonly"
    },
    "parserOptions": {
        "ecmaVersion": 2018,
        "sourceType": "module"
    },
    "rules": {
        "comma-dangle": ["error", "never"],
        "import/no-extraneous-dependencies": ["error", {"packageDir": "./"}]
    },
    "overrides": [
        {
            "files": [
                "**/__tests__/**"
            ],
            "env": {
                "jest": true
            },
            "plugins": ["jest"],
            "globals": {
                "expect": true,
                "test": true,
                "describe": true,
                "beforeAll": true,
                "beforeEach": true,
                "TestHelpers": "readonly"
            },
            "rules": {
                "jest/no-disabled-tests": "warn",
                "jest/no-focused-tests": "error",
                "jest/no-identical-title": "error",
                "jest/prefer-to-have-length": "warn",
                "jest/valid-expect": "error"
            }
        }
    ]
}