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HTTP/2 200
access-control-allow-origin: *
age: 31243
cache-control: public, max-age=0, must-revalidate
content-disposition: inline
content-encoding: gzip
content-type: text/html; charset=utf-8
date: Sat, 27 Dec 2025 12:25:51 GMT
etag: W/"c6844f47721aa9f72664017fec4b8180"
last-modified: Sat, 27 Dec 2025 03:45:08 GMT
server: Vercel
strict-transport-security: max-age=63072000
x-vercel-cache: HIT
x-vercel-id: bom1::sd6jw-1766838351799-66bda2f7776d
Socket.IO
Latest blog post (July 25, 2024): npm package provenance.
Performant
In most cases, the connection will be established with WebSocket, providing a low-overhead communication channel between the server and the client.
Reliable
Rest assured! In case the WebSocket connection is not possible, it will fall back to HTTP long-polling. And if the connection is lost, the client will automatically try to reconnect.
Scalable
Scale to multiple servers and send events to all connected clients with ease.
Basic example
Run this example on Replit / StackBlitz / CodeSandbox
Latest blog posts
- August 22, 2025 - Bun engine
- July 25, 2024 - npm package provenance
- July 12, 2024 - Socket.IO monorepo
- March 29, 2024 - Three new adapters
- January 12, 2024 - Chat platform
