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npm · npm:is

is active

the definitive JavaScript type testing library

The latest stable version of is is 3.3.2, published on 2025-07-19. Verified by Vigia on 2026-11-12.

Latest stable version3.3.2
Published2025-07-19 19:13:33 UTC
Installnpm install is@latest
Requires (engines){"node":">= 0.4"}
Peer dependencies—
Dist-tagslatest: 3.3.2
LicenseMIT
Advisories on latest versionnone known
Last verified2026-11-12 12:04:38 UTC
Sourcesapi.deps.dev, registry.npmjs.org, registry.npmjs.org

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Maintenance

Activityslowing down
Last stable release2025-07-19 19:13:33 UTC · 481 days ago
Stable releases in the last 12 months0
Published versions31

Heuristic based only on release dates; it does not measure issue or security response times.

Version history

VersionPublished
3.3.22025-07-19 19:13:33 UTC
3.3.02018-12-14 21:51:39 UTC
3.2.12017-02-27 18:41:40 UTC
3.2.02016-10-25 02:12:57 UTC
3.1.02015-09-19 15:29:02 UTC
3.0.12015-02-22 19:24:08 UTC
2.2.12015-02-06 08:55:07 UTC
2.2.02014-11-29 08:11:22 UTC
2.1.02014-10-21 17:40:47 UTC
2.0.22014-10-05 07:52:12 UTC
2.0.12014-09-02 07:07:47 UTC
2.0.02014-08-26 05:47:48 UTC
1.1.02014-08-22 08:56:36 UTC
1.0.02014-08-07 17:27:22 UTC
0.3.02014-03-02 22:29:10 UTC
0.2.72013-12-26 22:04:46 UTC
0.2.62013-05-06 23:22:36 UTC
0.2.52013-04-25 03:50:20 UTC
0.2.42013-04-18 02:51:29 UTC
0.2.32013-04-17 16:53:53 UTC

Showing the 20 most recent of 31 versions. JSON

Version compatibility

Newest stable version that declares support for each runtime version (from the requirements published with each version).

RuntimeNewest compatible version
node 163.3.2
node 183.3.2
node 203.3.2
node 223.3.2
node 243.3.2

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Frequently asked questions

What is the latest version of is?

The latest stable version of is is 3.3.2, published on 2025-07-19. Verified by Vigia on 2026-11-12.

How do I install the latest version of is?

Run npm install is@latest. The latest stable version is 3.3.2 (verified 2026-11-12).

Is is deprecated?

No. is is not marked as deprecated in the registry.

Which Node.js version does is require?

is 3.3.2 declares this requirement: {"node":">= 0.4"}.

Does is 3.3.2 have known vulnerabilities?

No known advisories affect is 3.3.2 according to the data Vigia checks.

Is is still maintained?

is published 0 stable releases in the last 12 months; the most recent was 481 days ago. Activity: slowing down.

Observed changes

No changes observed yet since Vigia started tracking this package.

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