Package

isomorphic-ws

Isomorphic implementation of WebSocket

v5.0.0, 27 Jun 2022MITCommonJSTypes: BundledWebSockets and realtime DOM and browser utilities

$ npm install isomorphic-ws

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 14.4m; +75% over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 0; Direct, from package.json
Last release: 4 years ago; v5.0.0
GitHub stars: 417; 46 forks
Open issues / PRs: 9 / 3
Contributors: -
Commits, last 52 weeks: 0

Downloads

Last week 2026-09-15 to 2026-09-21

Weekly npm downloads, one point per week, weeks starting 23 Sept 2025 to 15 Sept 2026. The y axis starts at zero.

14,368,173 downloads last week, 66,192,144 in the last month. The 12-month change of +75% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months: 05 in total
Latest version: 5.0.0, 27 Jun 20224 years ago
First published: 28 Apr 2017
Last push to GitHub: 20 Jun 20231,192 days before the snapshot
Repository archived: No
Open issues: 9
Open pull requests: 3
Commits, last 52 weeks: 0
Dependents on npm: 1,581

Major versions

v5 first release 5.0.0, 27 Jun 2022
v4 first release 4.0.0, 7 Feb 2018
v3 first release 3.2.0, 5 Oct 2017
v2 first release 2.3.1, 28 Apr 2017

Recent releases

Version	Published
5.0.0	27 Jun 2022
4.0.1	27 Apr 2018
4.0.0	7 Feb 2018
3.2.0	5 Oct 2017
2.3.1	28 Apr 2017

Compatibility

Module format: CommonJSFrom package.json type, main and exports fields
TypeScript types: Bundled
Node.js engine range: Not declared
Runtimes: -
Unpacked size (npm): 3.9 kB
Dependencies (0): None
Peer dependencies (1): ws

Install

npm install isomorphic-ws

CDN

jsDelivr: 59.3k requests in 30 days

jsDelivrhttps://cdn.jsdelivr.net/npm/isomorphic-ws@5.0.0/
unpkghttps://unpkg.com/isomorphic-ws@5.0.0/
esm.shhttps://esm.sh/isomorphic-ws@5.0.0

Alternatives

Package	Weekly downloads	Gzip	Last release	Module	Comparison
@d-fischer/isomorphic-ws Isomorphic implementation of WebSocket	661.7k	-	2 years ago	ESM + CommonJS	-
simple-websocket Simple, EventEmitter API for WebSockets (browser)	696.2k	-	5 years ago	CommonJS	-
isows Isomorphic WebSocket	6.3m	-	1 year ago	ESM + CommonJS	-
sockjs SockJS-node is a server counterpart of SockJS-client a JavaScript library that provides a WebSocket-like object in the browser. SockJS gives you a coherent, cross-browser, Javascript API which creates a low latency, full duplex, cross-domain communication	13.9m	-	4 years ago	CommonJS	-
@libsql/isomorphic-ws Isomorphic WebSockets in Node, Bun, Deno and Cloudflare Workers	1.9m	-	3 years ago	ESM + CommonJS	-

Sources: npm registry, npm downloads API, GitHub API, jsDelivr. Data fetched 25 Sept 2026.

Indexability: Indexed.