Package
fast-check
Property based testing framework for JavaScript (like QuickCheck)
Key numbers
As of 25 Sept 2026
- Weekly downloads
- 30m
- +535% over 12 months
- Gzip bundle size
- -
- No Bundlephobia data
- Dependencies
- 1
- Direct, from package.json
- Last release
- 5 days ago
- v4.10.2
- GitHub stars
- 5.2k
- 212 forks
- Open issues / PRs
- 58 / 18
- Contributors
- -
- Commits, last 52 weeks
- 896
Downloads
Last week 2026-09-15 to 2026-09-21
30,040,703 downloads last week, 137,254,044 in the last month. The 12-month change of +535% compares the average of the last 4 weeks with the first 4 weeks of the series.
- Releases, last 12 months
- 12195 in total
- Latest version
- 4.10.2, 19 Sept 20265 days ago
- First published
- 28 Dec 2017
- Last push to GitHub
- 24 Sept 2026same day as the snapshot
- Repository archived
- No
- Open issues
- 58
- Open pull requests
- 18
- Commits, last 52 weeks
- 896
- Dependents on npm
- 193
Major versions
- v4 first release 4.0.0, 10 Mar 2025
- v3 first release 3.0.0, 25 May 2022
- v2 first release 2.0.0, 25 Jul 2020
- v1 first release 1.0.0, 21 Apr 2018
- v0 first release 0.0.1, 28 Dec 2017
Recent releases
| Version | Published |
|---|---|
| 4.10.2 | 19 Sept 2026 |
| 4.10.1 | 15 Sept 2026 |
| 4.10.0 | 11 Sept 2026 |
| 4.9.0 | 8 Jul 2026 |
| 4.8.0 | 11 May 2026 |
| 4.7.0 | 17 Apr 2026 |
| 4.6.0 | 8 Mar 2026 |
| 4.5.3 | 30 Dec 2025 |
| 4.5.2 | 21 Dec 2025 |
| 4.5.1 | 21 Dec 2025 |
| 4.5.0 | 20 Dec 2025 |
| 4.4.0 | 6 Dec 2025 |
| 4.3.0 | 29 Aug 2025 |
| 4.2.0 | 5 Jul 2025 |
- Module format
- ESM + CommonJSFrom package.json type, main and exports fields
- TypeScript types
- Bundled
- Node.js engine range
- >=12.17.0
- Runtimes
- -
- Unpacked size (npm)
- 1.5 MB
- Dependencies (1)
pure-rand
npm install fast-checkCDN
jsDelivr: 326.6k requests in 30 days
- jsDelivr
https://cdn.jsdelivr.net/npm/fast-check@4.10.2/ - unpkg
https://unpkg.com/fast-check@4.10.2/ - esm.sh
https://esm.sh/fast-check@4.10.2
| Package | Weekly downloads | Gzip | Last release | Module | Comparison |
|---|---|---|---|---|---|
| rewire | 509.2k | - | 1 year ago | CommonJS | fast-check vs rewire |
| ng-mocks | 404.6k | - | 6 days ago | ESM + CommonJS | - |
| mockttp | 399.2k | - | 13 days ago | CommonJS | - |
| mock-property | 450.6k | - | 3 months ago | CommonJS | - |
| mock-socket | 684.5k | - | 3 years ago | CommonJS | - |
| xhr-mocklet | 332.8k | - | 7 years ago | ESM + CommonJS | - |
| @jest-mock/express | 502.9k | - | 1 year ago | CommonJS | - |
| fetch-mock-cache | 456.8k | - | 2 months ago | ESM only | - |
Indexability: Indexed.