dubzzz / fast-check
Property based testing framework for JavaScript (like QuickCheck) written in TypeScript
- Stars
- 5,247 stars
- Forks
- 219 forks
- Language
- TypeScript
- License
- MIT
- Created
- Oct 30, 2017
- Last push
- Nov 11, 2026
- Updated
- Nov 11, 2026
Why these Tags: an agent read the README and quoted it
- Test framework from the description:
Property based testing framework for JavaScript (like QuickCheck) written in TypeScript
An agent gave these Tags from the fixed Tag list in the AwesomeRepos source code. A code check kept each Tag only when its quote is in the text. A wrong Tag? Report an error with the form at the end of this page.
Admitted to the Repository Index on Nov 10, 2026: 5,242 stars on 2026-11-10.
Star History
188 days recorded, May 8, 2026 – Nov 11, 2026 (UTC). Net change +348 stars.
The star count of each day is the latest count minus the net stars of the later days.
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Star History chart
[](https://awesomerepos.com/dubzzz/fast-check) Badge
[](https://awesomerepos.com/dubzzz/fast-check) Timeline
It gained stars on 145 of the 188 days recorded since May 8, 2026.
Its largest 7 days were May 19, 2026 to May 25, 2026: 64 stars.
In the 30 days to Nov 11, 2026 it got 55 stars, 8% fewer than in the 30 days before.
- Created on the Repository Host
- +7 stars in one day
- Largest star day recorded: +43 stars
- Reached 5,000 stars, 3,144 days after it was created
- Release v4.10.0: New plugin API and deprecations ahead of v5
- Release vitest/v0.5.0: Support for plugins and for Vitest v5
- Release jest/v2.3.0: Support for plugins
- Release v4.10.1: Fix fake-timer compatibility in timeout and interrupt plugins
- Release v4.10.2
- +8 stars in one day
- Entered the Repository Index: 5,242 stars on 2026-11-10
- Latest push
The timeline comes from the creation date and the releases on the Repository Host, the Admission, the Star History, and the Observations. Star milestones show only when the Star History records the day. The list shows up to 5 stable releases from the latest 10 releases recorded. When none of them is stable, one item counts the pre-releases. On the chart of net stars each day, a solid line marks each recorded release.
Forks and pushes
From 2 Observations, Nov 11, 2026 – Nov 12, 2026. Forks 0. AwesomeRepos saw a new push on 1 of 1 days.
- Nov 12, 2026: new push
A filled day: the last push time changed since the Observation before it.
Health facts
Measured facts in four separate dimensions, each with a date and a source. AwesomeRepos does not add them into one score. AwesomeRepos reads the weekly commits, the changelog, and the community files each week for the 5,000 visible repositories with the most stars and for each rising repository. How AwesomeRepos defines each check
Maintenance
2 of 4 checks (2 without data)-
Yes: Not archived
GitHub does not mark the repository as archived. Source
-
Yes: A push in the last 90 days
Last push on 2026-11-11, 0 days ago. Source
-
No data: Commits in the last 13 weeks
No data: AwesomeRepos has not read the weekly commits.
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No data: Commits in 26 or more of the last 52 weeks
No data: AwesomeRepos has not read the weekly commits.
Releases
2 of 3 checks (1 without data)-
Yes: A release in the last 365 days
Newest release v4.10.2 on 2026-09-19, 53 days ago. 10 or more releases in the last 365 days. Source
-
Yes: The newest release tag is a semantic version
The newest release tag is v4.10.2. Source
-
No data: A changelog file at the root
No data: AwesomeRepos has not scanned this repository.
Security practice
0 of 1 check (1 without data)-
No data: A security policy
No data: AwesomeRepos has not scanned this repository.
AwesomeRepos has not asked OpenSSF Scorecard about this repository.
Community files
1 of 3 checks (2 without data)-
Yes: A licence
GitHub finds the licence MIT. Source
-
No data: A contributing guide
No data: AwesomeRepos has not scanned this repository.
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No data: A code of conduct
No data: AwesomeRepos has not scanned this repository.
Dependencies in the index
This section shows the packages that connect this repository to other repositories in the index.
The GitHub dependency graph of this repository names 157 direct packages (scanned on Nov 12, 2026). None of them comes from another repository in the index.
126 scanned repositories name a package from this repository.
Uses (in the index) · 0
None.
Used by (in the index) · 126
- morluto/rea 453K
npm: @fast-check/vitest
- anomalyco/opencode 226K
npm: fast-check
- n8n-io/n8n 210K
npm: fast-check
-
npm: fast-check
- pingdotgg/t3code 57K
npm: fast-check
-
npm: fast-check
-
npm: fast-check
- jestjs/jest 45K
npm: @fast-check/jest
-
npm: fast-check
- alibaba/nacos 34K
npm: fast-check
Show 20 more
-
npm: fast-check
-
npm: fast-check
- ReactiveX/rxjs 32K
npm: fast-check
-
npm: fast-check
-
npm: fast-check
-
npm: fast-check
- readest/readest 26K
npm: fast-check
-
npm: fast-check
- ramda/ramda 24K
npm: fast-check
- meta/lexical 24K
npm: fast-check
-
npm: fast-check
- teableio/teable 22K
npm: fast-check
- elastic/kibana 21K
npm: @fast-check/jest
- elizaOS/eliza 20K
npm: fast-check
- google/magika 19K
npm: fast-check
- Effect-TS/effect 18K
npm: fast-check
- cure53/DOMPurify 18K
npm: fast-check
- udecode/plate 17K
npm: fast-check
- tinymce/tinymce 16K
npm: fast-check
- cursor/plugins 16K
npm: fast-check
The page lists the 30 with the most stars, of 126.
Sources: the GitHub dependency graph of each repository, and deps.dev for the source repository of each package . A dependency graph also names development packages. deps.dev takes most source repositories from package metadata. How the dependency graph is made
Observations
Latest Observation, Nov 12, 2026: 5,247 stars, 219 forks, last push Nov 11, 2026, not archived. One of 2 Observations since Nov 11, 2026.