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effect

The missing standard library for TypeScript, for writing production-grade software.
Licenses: MIT
Published: 3 years ago Last updated: 22 days ago Latest version: 3.22.1 Latest non-vulnerable version: 4.0.0-rc.111
npm
GitHub

Package Health Score

89/100
  • securityNo known security issues
  • popularityKey ecosystem project
  • maintenanceHealthy
  • communityActive

Maintenance

HEALTHY

Commit Frequency

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Open Issues
159
Open PR
65
New PRS
0
Last Release
22 days ago
Last Commit
1 months ago
Maintainers
2

Further analysis of the maintenance status of effect based on released npm versions cadence, the repository activity, and other data points determined that its maintenance is Healthy.

We found that effect demonstrates a positive version release cadence with at least one new version released in the past 3 months.

In the past month we didn't find any pull request activity or change in issues status has been detected for the GitHub repository.

Popularity

KEY ECOSYSTEM PROJECT
Weekly downloads (28.2M)
GitHub Stars
14.9k
Forks
604
Contributors
210

The npm package effect receives a total of 28,235,639 downloads a week. As such, we scored effect popularity level to be Key ecosystem project.

Based on project statistics from the GitHub repository for the npm package effect, we found that it has been starred 14,857 times.

Downloads are calculated as moving averages for a period of the last 12 months, excluding weekends and known missing data points.

Community

ACTIVE
Readme.md
No
Contributing.md
No
Code of Conduct
Yes
Contributors
210
Funding
Yes
LICENSE
MIT

A good and healthy external contribution signal for effect project, which invites more than one hundred open source maintainers to collaborate on the repository.

How about a good first contribution to this project? It seems that effect is missing a README file.

License

MIT>=0;
Report a new vulnerability Found a mistake?

Direct Vulnerabilities

Known vulnerabilities in the effect package. This does not include vulnerabilities belonging to this package’s dependencies.

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Security

NO KNOWN SECURITY ISSUES
Show only direct vulnerabilities in latest version
No vulnerabilities found

No vulnerabilities found in the latest version

There are 1 total vulnerabilities, but none affect the latest version (3.22.1)

Package versions

476 VERSIONS IN TOTAL See all versions
versionpublisheddirect vulnerabilities
4.0.0-rc.11120 Aug, 2026
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4.0.0-rc.11017 Aug, 2026
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4.0.0-rc.10914 Aug, 2026
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4.0.0-rc.10812 Aug, 2026
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4.0.0-beta.10710 Aug, 2026
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4.0.0-beta.1068 Aug, 2026
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4.0.0-beta.1057 Aug, 2026
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4.0.0-beta.1046 Aug, 2026
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4.0.0-beta.1034 Aug, 2026
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4.0.0-beta.10226 Jul, 2026
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effect dependencies

2 IN TOTAL
fast-check@standard-schema/spec