@mswjs/data

Tools for modeling and querying data in tests.

What it does

Tools for modeling and querying data in tests.

Building a stateful mocked backend for application test scenarios.

@msw/playwright — Controlling network responses during browser-level application tests.
Argos — Detecting interface changes by comparing screenshots in development workflows.
enforce-unique — Avoiding duplicate fixture values while creating test data.
Faker — Creating sample users, records, and large development datasets.
Falso — Creating typed fixtures such as names, addresses, and product details.

Editorial overview reviewed on October 24, 2026. Follow the source for current setup, compatibility, and licensing.