Skip to content
JS
Package

eventemitter2

A feature-rich Node.js event emitter implementation with namespaces, wildcards, TTL, async listeners and browser/worker support.

v6.4.9, 12 Sept 2022MITCommonJSTypes: Bundled
$ npm install eventemitter2
npmGitHubHomepage

Key numbers

As of 25 Sept 2026
Weekly downloads
11.6m
-5% over 12 months
Gzip bundle size
-
No Bundlephobia data
Dependencies
0
Direct, from package.json
Last release
4 years ago
v6.4.9
GitHub stars
2.9k
248 forks
Open issues / PRs
34 / 16
Contributors
-
Commits, last 52 weeks
0

Downloads

Last week 2026-09-15 to 2026-09-21
05m10m15m20mSept 2025Mar 2026Sept 2026High 17m (10 Mar 2026)Low 7.6m (23 Dec 2025)
Weekly npm downloads, one point per week, weeks starting 23 Sept 2025 to 15 Sept 2026. The y axis starts at zero.

11,635,463 downloads last week, 52,918,296 in the last month. The 12-month change of -5% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months
062 in total
Latest version
6.4.9, 12 Sept 20224 years ago
First published
1 Jun 2011
Last push to GitHub
19 Feb 2024948 days before the snapshot
Repository archived
No
Open issues
34
Open pull requests
16
Commits, last 52 weeks
0
Dependents on npm
2,027

Major versions

  1. v6 first release 6.0.0, 23 Dec 2019
  2. v5 first release 5.0.0, 1 Dec 2017
  3. v4 first release 4.0.0, 22 Mar 2017
  4. v3 first release 3.0.0, 23 Jan 2017
  5. v2 first release 2.0.0, 4 Jul 2016
  6. v1 first release 1.0.0, 24 Feb 2016
  7. v0 first release 0.0.1, 1 Jun 2011

Recent releases

VersionPublished
6.4.912 Sept 2022
6.4.86 Sept 2022
6.4.71 Aug 2022
6.4.630 Jun 2022
6.4.53 Oct 2021
6.4.424 Feb 2021
6.4.322 Jun 2020
6.4.230 May 2020
6.4.120 May 2020
6.4.06 May 2020
6.3.128 Mar 2020
6.3.028 Mar 2020
6.2.120 Mar 2020
6.2.020 Mar 2020

Compatibility

Module format
CommonJSFrom package.json type, main and exports fields
TypeScript types
Bundled
Node.js engine range
Not declared
Runtimes
-
Unpacked size (npm)
79 kB
Dependencies (0)
None

Install

npm install eventemitter2

CDN

jsDelivr: 135.4k requests in 30 days
  • jsDelivrhttps://cdn.jsdelivr.net/npm/eventemitter2@6.4.9/
  • unpkghttps://unpkg.com/eventemitter2@6.4.9/
  • esm.shhttps://esm.sh/eventemitter2@6.4.9
Sources: npm registry, npm downloads API, GitHub API, jsDelivr. Data fetched 25 Sept 2026.

Indexability: Not indexed (discovery only): no category.