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npm · npm:eventsource

eventsource active

WhatWG/W3C compliant EventSource client for Node.js and browsers

The latest stable version of eventsource is 5.1.5, published on 2026-11-08. Verified by Vigia on 2026-11-12.

Latest stable version5.1.5
Published2026-11-08 19:07:06 UTC
Installnpm install eventsource@latest
Requires (engines){"node":">=22.12.0"}
Peer dependencies—
Dist-tagsumd: 3.0.5-umd.0 next: 3.0.0-beta.0 latest: 5.1.5
LicenseMIT
Advisories on latest versionnone known
Last verified2026-11-12 19:38:05 UTC
Sourcesapi.deps.dev, registry.npmjs.org, registry.npmjs.org

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Maintenance

Activityactive
Last stable release2026-11-08 19:07:06 UTC · 4 days ago
Stable releases in the last 12 months9
Published versions55

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

Version history

VersionPublished
5.1.52026-11-08 19:07:06 UTC
5.1.42026-10-28 20:23:14 UTC
5.1.32026-10-14 15:43:33 UTC
5.1.22026-09-21 17:33:35 UTC
5.1.12026-08-20 20:01:15 UTC
5.1.02026-08-14 02:07:35 UTC
5.0.02026-08-10 21:09:54 UTC
4.1.12026-08-04 23:10:01 UTC
4.1.02025-11-19 22:44:31 UTC
4.0.02025-05-13 07:53:28 UTC
3.0.72025-05-09 10:32:51 UTC
3.0.62025-03-27 05:45:48 UTC
3.0.52025-01-28 00:54:24 UTC
3.0.42025-01-28 00:03:30 UTC
3.0.32025-01-27 21:29:37 UTC
3.0.22024-12-13 00:13:44 UTC
3.0.12024-12-07 19:15:41 UTC
3.0.02024-12-07 19:12:06 UTC
1.1.22022-06-08 14:06:53 UTC
1.1.12022-05-12 04:42:52 UTC

Showing the 20 most recent of 53 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 162.0.2
node 183.0.7
node 204.1.1
node 225.1.5
node 245.1.5

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Frequently asked questions

What is the latest version of eventsource?

The latest stable version of eventsource is 5.1.5, published on 2026-11-08. Verified by Vigia on 2026-11-12.

How do I install the latest version of eventsource?

Run npm install eventsource@latest. The latest stable version is 5.1.5 (verified 2026-11-12).

Is eventsource deprecated?

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

Which Node.js version does eventsource require?

eventsource 5.1.5 declares this requirement: {"node":">=22.12.0"}.

Does eventsource 5.1.5 have known vulnerabilities?

No known advisories affect eventsource 5.1.5 according to the data Vigia checks.

Is eventsource still maintained?

eventsource published 9 stable releases in the last 12 months; the most recent was 4 days ago. Activity: active.

Observed changes

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