Package
effect
The missing standard library for TypeScript, for writing production-grade software.
Key numbers
As of 25 Sept 2026
- Weekly downloads
- 26.3m
- +544% over 12 months
- Gzip bundle size
- -
- No Bundlephobia data
- Dependencies
- 2
- Direct, from package.json
- Last release
- 15 days ago
- v3.22.2
- GitHub stars
- 16.2k
- 767 forks
- Open issues / PRs
- 174 / 110
- Contributors
- -
- Commits, last 52 weeks
- 3,194
Downloads
Last week 2026-09-15 to 2026-09-21
26,315,867 downloads last week, 120,527,897 in the last month. The 12-month change of +544% compares the average of the last 4 weeks with the first 4 weeks of the series.
- Releases, last 12 months
- 37273 in total
- Latest version
- 3.22.2, 9 Sept 202615 days ago
- First published
- 23 Nov 2022
- Last push to GitHub
- 25 Sept 2026same day as the snapshot
- Repository archived
- No
- Open issues
- 174
- Open pull requests
- 110
- Commits, last 52 weeks
- 3,194
- Dependents on npm
- 3,329
Major versions
- v3 first release 3.0.0, 16 Apr 2024
- v2 first release 2.0.0, 3 Jan 2024
Recent releases
| Version | Published |
|---|---|
| 3.22.2 | 9 Sept 2026 |
| 3.22.1 | 30 Jul 2026 |
| 3.22.0 | 13 Jul 2026 |
| 3.21.5 | 13 Jul 2026 |
| 3.21.4 | 18 Jun 2026 |
| 3.21.3 | 5 Jun 2026 |
| 3.21.2 | 22 Apr 2026 |
| 3.21.1 | 17 Apr 2026 |
| 3.21.0 | 20 Mar 2026 |
| 3.20.1 | 19 Mar 2026 |
| 3.20.0 | 16 Mar 2026 |
| 3.19.19 | 21 Feb 2026 |
| 3.19.18 | 17 Feb 2026 |
| 3.19.17 | 14 Feb 2026 |
- Module format
- ESM + CommonJSFrom package.json type, main and exports fields
- TypeScript types
- Bundled
- Node.js engine range
- Not declared
- Runtimes
- -
- Unpacked size (npm)
- 25.9 MB
- Dependencies (2)
fast-check@standard-schema/spec
npm install effectCDN
jsDelivr: 1.5m requests in 30 days
- jsDelivr
https://cdn.jsdelivr.net/npm/effect@3.22.2/ - unpkg
https://unpkg.com/effect@3.22.2/ - esm.sh
https://esm.sh/effect@3.22.2
| Package | Weekly downloads | Gzip | Last release | Module | Comparison |
|---|---|---|---|---|---|
| tsx | 63.8m | - | 4 days ago | ESM + CommonJS | tsx vs effect |
| json-schema-to-ts | 24.9m | - | 2 years ago | ESM + CommonJS | effect vs json-schema-to-ts |
| io-ts | 2m | - | 1 year ago | ESM + CommonJS | - |
| json-schema-to-typescript-lite | 629.1k | - | 1 year ago | ESM + CommonJS | - |
| inversify | 1.9m | - | 2 months ago | ESM only | - |
| @inversifyjs/core | 1.1m | - | 2 months ago | ESM only | - |
| @inversifyjs/reflect-metadata-utils | 1.1m | - | 6 months ago | ESM only | - |
| @inversifyjs/common | 1.1m | - | 6 months ago | ESM only | - |
Related
Indexability: Indexed.