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vitest

Next generation testing framework powered by Vite

v5.0.1, 15 Sept 2026MITESM + CommonJSTypes: BundledTesting
$ npm install vitest
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Key numbers

As of 25 Sept 2026
Weekly downloads
73.8m
+425% over 12 months
Gzip bundle size
-
No Bundlephobia data
Dependencies
13
Direct, from package.json
Last release
9 days ago
v5.0.1
GitHub stars
17.2k
2k forks
Open issues / PRs
346 / 98
Contributors
820
Commits, last 52 weeks
1,200

Downloads

Last week 2026-09-15 to 2026-09-21
050m100m150mSept 2025Mar 2026Sept 2026High 101.3m (25 Aug 2026)Low 10.5m (23 Dec 2025)
Weekly npm downloads, one point per week, weeks starting 23 Sept 2025 to 15 Sept 2026. The y axis starts at zero.

73,825,000 downloads last week, 370,811,021 in the last month. The 12-month change of +425% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months
36411 in total
Latest version
5.0.1, 15 Sept 20269 days ago
First published
3 Dec 2021
Last push to GitHub
25 Sept 2026same day as the snapshot
Repository archived
No
Open issues
346
Open pull requests
98
Commits, last 52 weeks
1,200
Dependents on npm
1,889

Major versions

  1. v5 first release 5.0.0, 3 Sept 2026
  2. v4 first release 4.0.0, 22 Oct 2025
  3. v3 first release 3.0.0, 16 Jan 2025
  4. v2 first release 2.0.0, 8 Jul 2024
  5. v1 first release 1.0.0, 4 Dec 2023
  6. v0 first release 0.0.0, 3 Dec 2021

Recent releases

VersionPublished
5.0.115 Sept 2026
5.0.03 Sept 2026
4.1.1118 Aug 2026
4.1.106 Jul 2026
3.2.76 Jul 2026
4.1.915 Jun 2026
3.2.61 Jun 2026
3.2.51 Jun 2026
4.1.81 Jun 2026
4.1.720 May 2026
4.1.611 May 2026
4.1.521 Apr 2026
4.1.49 Apr 2026
4.1.37 Apr 2026

Compatibility

Module format
ESM + CommonJSFrom package.json type, main and exports fields
TypeScript types
Bundled
Node.js engine range
^22.12.0 || ^24.0.0 || >=26.0.0
Runtimes
-
Unpacked size (npm)
2.6 MB
Dependencies (13)
chaiobugstd-envtinyexecpicomatchtinybenchtinyglobby@types/chaiexpect-typemagic-string@vitest/mockeres-module-lexerwhy-is-node-running
Peer dependencies (12)
vitejsdomhappy-dom@vitest/ui@types/node@edge-runtime/vm@opentelemetry/api@vitest/coverage-v8@vitest/browser-preview@vitest/coverage-istanbul@vitest/browser-playwright@vitest/browser-webdriverio

Install

npm install vitest

CDN

jsDelivr: 11.3m requests in 30 days
  • jsDelivrhttps://cdn.jsdelivr.net/npm/vitest@5.0.1/
  • unpkghttps://unpkg.com/vitest@5.0.1/
  • esm.shhttps://esm.sh/vitest@5.0.1
Sources: npm registry, npm downloads API, GitHub API, jsDelivr. Data fetched 25 Sept 2026.

Indexability: Indexed.