jest
Delightful JavaScript Testing.
The batteries-included testing framework.
When to choose it: React and Node projects that want everything in one tool — runner, assertions, mocking and snapshots — with a vast ecosystem.
- + All-in-one (assert + mock + snapshots)
- + Huge ecosystem
- + Well documented
- - Slower than Vitest
- - ESM/TS setup can be fiddly
- Latest version
- 30.4.2
- Monthly downloads
- 180,895,668
- GitHub stars
- 45,353
- Minified + gzip
- —
- Dependencies
- —
- License
- MIT
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Data from npm, Bundlephobia and GitHub. Last updated 2026-06-02.