is

npmv3.3.2

the definitive JavaScript type testing library

License MITpermissive31 versions1 maintainers0 deps2,960,639 weekly dl
git://github.com/enricomarino/is
69
/ 100
Health
safe to use

[email protected] is safe to use (health: 69/100)

Health breakdown0 – 100
10/25
maintenance
17/20
popularity
25/25
security
15/15
maturity
2/15
community
Vulnerabilities
0
none known

Bundle & TypeScript

📦

Bundle Size

4.9 KBminified
1.4 KB gzipped
0 direct dependencies
side effects
🌟

TypeScript

7/10typed
Types from @types/is (DefinitelyTyped)
Quality signals
OSS Criticality
0.68high

Health History

Dependency Tree

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First published · 2011-11-19T23:50:28.498Z

Last updated · 2025-07-19T19:13:33.146Z