Key numbers
As of 25 Sept 2026
- Weekly downloads
- 61m
- +90% over 12 months
- Gzip bundle size
- -
- No Bundlephobia data
- Dependencies
- 0
- Direct, from package.json
- Last release
- 2 years ago
- v2.0.2
- GitHub stars
- 3
- 2 forks
- Open issues / PRs
- 1 / 0
- Contributors
- 1
- Commits, last 52 weeks
- 1
Downloads
Last week 2026-09-15 to 2026-09-21
61,036,643 downloads last week, 272,068,456 in the last month. The 12-month change of +90% compares the average of the last 4 weeks with the first 4 weeks of the series.
- Releases, last 12 months
- 05 in total
- Latest version
- 2.0.2, 8 Mar 20242 years ago
- First published
- 18 Feb 2015
- Last push to GitHub
- 13 Jan 2026254 days before the snapshot
- Repository archived
- No
- Open issues
- 1
- Open pull requests
- 0
- Commits, last 52 weeks
- 1
- Dependents on npm
- 648
Major versions
- v2 first release 2.0.0, 12 Nov 2019
- v1 first release 1.0.0, 18 Feb 2015
Recent releases
| Version | Published |
|---|---|
| 2.0.2 | 8 Mar 2024 |
| 2.0.1 | 18 Dec 2019 |
| 2.0.0 | 12 Nov 2019 |
| 1.0.1 | 31 Aug 2015 |
| 1.0.0 | 18 Feb 2015 |
- Module format
- CommonJSFrom package.json type, main and exports fields
- TypeScript types
- Bundled
- Node.js engine range
- >= 0.4
- Runtimes
- -
- Unpacked size (npm)
- 20 kB
- Dependencies (0)
- None
npm install is-weakmap- jsDelivr
https://cdn.jsdelivr.net/npm/is-weakmap@2.0.2/ - unpkg
https://unpkg.com/is-weakmap@2.0.2/ - esm.sh
https://esm.sh/is-weakmap@2.0.2
Indexability: Not indexed (discovery only): no category.