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happy-dom active

Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.

The latest stable version of happy-dom is 21.0.4, published on 2026-10-20. Verified by Vigia on 2026-11-13.

Latest stable version21.0.4
Published2026-10-20 18:05:53 UTC
Installnpm install happy-dom@latest
Requires (engines){"node":">=20.0.0"}
Peer dependencies—
Dist-tagslatest: 21.0.4
LicenseMIT
Advisories on latest versionnone known
Last verified2026-11-13 04:35:48 UTC
Sourcesapi.deps.dev, registry.npmjs.org, registry.npmjs.org

Maintenance

Activityactive
Last stable release2026-10-15 23:32:07 UTC · 28 days ago
Stable releases in the last 12 months81
Published versions777

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

Version history

VersionPublished
21.0.32026-10-15 23:32:07 UTC
21.0.22026-10-15 22:53:49 UTC
21.0.12026-10-12 00:31:42 UTC
21.0.02026-10-11 23:46:41 UTC
20.14.62026-10-08 23:18:02 UTC
20.14.52026-09-12 00:07:47 UTC
20.14.42026-09-12 00:05:02 UTC
20.14.32026-09-09 22:39:32 UTC
20.14.22026-09-09 22:00:22 UTC
20.14.12026-09-09 21:50:01 UTC
20.14.02026-09-03 21:41:56 UTC
20.13.22026-09-02 15:52:14 UTC
20.13.12026-09-02 12:03:07 UTC
20.13.02026-09-02 09:40:37 UTC
20.12.22026-09-02 00:25:23 UTC
20.12.12026-09-01 23:35:11 UTC
20.12.02026-08-29 16:12:16 UTC
20.11.152026-08-28 23:47:38 UTC
20.11.142026-08-28 22:51:26 UTC
20.11.132026-08-28 15:19:50 UTC

Showing the 20 most recent of 777 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 1614.12.3
node 1817.6.1
node 2021.0.3
node 2221.0.3
node 2421.0.3

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Frequently asked questions

What is the latest version of happy-dom?

The latest stable version of happy-dom is 21.0.4, published on 2026-10-20. Verified by Vigia on 2026-11-13.

How do I install the latest version of happy-dom?

Run npm install happy-dom@latest. The latest stable version is 21.0.4 (verified 2026-11-13).

Is happy-dom deprecated?

No. happy-dom is not marked as deprecated in the registry.

Which Node.js version does happy-dom require?

happy-dom 21.0.4 declares this requirement: {"node":">=20.0.0"}.

Does happy-dom 21.0.4 have known vulnerabilities?

No known advisories affect happy-dom 21.0.4 according to the data Vigia checks.

Is happy-dom still maintained?

happy-dom published 81 stable releases in the last 12 months; the most recent was 28 days ago. Activity: active.

Observed changes

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