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@types/chai

TypeScript definitions for chai

v5.2.3, 20 Oct 2025MITESM onlyTypes: Bundled
$ npm install @types/chai
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Key numbers

As of 25 Sept 2026
Weekly downloads
63.6m
+395% over 12 months
Gzip bundle size
-
No Bundlephobia data
Dependencies
2
Direct, from package.json
Last release
11 months ago
v5.2.3
GitHub stars
51.4k
30.4k forks
Open issues / PRs
558 / 143
Contributors
22,114
Commits, last 52 weeks
1,474

Downloads

Last week 2026-09-15 to 2026-09-21
025m50m75m100mSept 2025Mar 2026Sept 2026High 85.1m (25 Aug 2026)Low 9.5m (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.

63,633,402 downloads last week, 313,727,204 in the last month. The 12-month change of +395% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months
188 in total
Latest version
5.2.3, 20 Oct 202511 months ago
First published
17 May 2016
Last push to GitHub
24 Sept 2026same day as the snapshot
Repository archived
No
Open issues
558
Open pull requests
143
Commits, last 52 weeks
1,474
Dependents on npm
1,162

Major versions

  1. v5 first release 5.0.0, 24 Sept 2024
  2. v4 first release 4.0.0, 1 Jun 2017
  3. v2 first release 2.0.0, 10 Jan 2017
  4. v3 first release 3.4.28, 14 Jul 2016

Recent releases

VersionPublished
5.2.320 Oct 2025
5.2.25 May 2025
5.2.124 Mar 2025
5.2.05 Mar 2025
5.0.128 Oct 2024
4.3.2024 Sept 2024
5.0.024 Sept 2024
4.3.1927 Aug 2024
4.3.1826 Aug 2024
4.3.171 Aug 2024
4.3.164 May 2024
4.3.152 May 2024
4.3.1420 Mar 2024
4.3.1319 Mar 2024

Compatibility

Module format
ESM onlyFrom package.json type, main and exports fields
TypeScript types
Bundled
Node.js engine range
Not declared
Runtimes
-
Unpacked size (npm)
90 kB
Dependencies (2)
@types/deep-eqlassertion-error

Install

npm install @types/chai

CDN

jsDelivr: 103.7k requests in 30 days
  • jsDelivrhttps://cdn.jsdelivr.net/npm/@types/chai@5.2.3/
  • unpkghttps://unpkg.com/@types/chai@5.2.3/
  • esm.shhttps://esm.sh/@types/chai@5.2.3
Sources: npm registry, npm downloads API, GitHub API, jsDelivr. Data fetched 25 Sept 2026.

Indexability: Not indexed (discovery only): no category.