Testing · Junior · Question 37 of 78

What is MSW (Mock Service Worker)?

✓Correct answer: A library that intercepts requests at the network level and answers with mock responses, in the browser and in Node.js
2A service worker that caches the site for offline use
3A Jest plugin for snapshot tests

Explanation

The app code keeps calling real fetch; MSW returns responses from handlers. The same handlers work in tests, Storybook and local development.

Further reading

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