socketio/socket.io

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Bidirectional and low-latency communication for every platform

Stars: 63.2k
Forks: 10.3k
Open beginner issues: 0
Indexed issues: 164
Avg merge: 11d 20h
Merged PRs (30d): 2

Dominant language: TypeScript
License: MIT
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

Open All

164 open issues indexed

Connection State Recovery fails if client reconnects before server emits any events ("Zero-Event" reconnect) Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 56/100

socketio/socket.io#5538 · 1 comment · Opened Aug 21, 2026
RFC: Standard Schema validation and type inference for Socket.IO Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

socketio/socket.io#5512 · 2 comments · 4 reactions · Opened Jun 11, 2026
Official documentation can't open Open

needs investigation

Difficulty 3/5 1-2 days Newbie friendliness 35/100

socketio/socket.io#5511 · 19 comments · Opened Jun 11, 2026
A client receiving an `Object` with more than 10 binary fields closes the connection Open

question

Difficulty 4/5 3-5 days Newbie friendliness 48/100

socketio/socket.io#5504 · 4 comments · Opened May 26, 2026
Can't set response headers in Server.handleUpgrade Open

question

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

socketio/socket.io#5497 · 2 comments · Opened May 11, 2026
WebTransport ignores query parameters in URL Open

question

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

socketio/socket.io#5496 · 2 comments · Opened May 10, 2026
Error in mTLS in node js using PKCS11 proxy and HSM Open

question

Difficulty 5/5 Over a week Newbie friendliness 30/100

socketio/socket.io#5480 · 2 comments · Opened Mar 27, 2026
Heartbeat timeout is no longer reset on packet Open

needs investigation

Difficulty 3/5 1-2 days Newbie friendliness 48/100

socketio/socket.io#5450 · 3 comments · Opened Jan 24, 2026
Incorrect acknowledgment callback signature when emitting before connection with ackTimeout option Open

question

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

socketio/socket.io#5446 · 3 comments · Opened Jan 18, 2026
Korean Docs Request Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 38/100

socketio/socket.io#5427 · 1 comment · 3 reactions · Opened Dec 16, 2025
Send message to a Set<Room> Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

socketio/socket.io#5418 · Opened Nov 17, 2025
TypeScript type breakage under pnpm / preserveSymlinks=true due to extending Emitter from another package Open

needs investigation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

socketio/socket.io#5411 · 2 comments · Opened Nov 3, 2025
Leave multiple rooms at once Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

socketio/socket.io#5391 · 4 comments · Opened Sep 9, 2025
`socket.io-client` on the browser Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

socketio/socket.io#5383 · 1 comment · Opened Aug 28, 2025
Publish to JSR Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

socketio/socket.io#5381 · Opened Aug 25, 2025
WebSocket is closed before the connection is established. Open

needs investigation

Difficulty 4/5 3-5 days Newbie friendliness 42/100

socketio/socket.io#5371 · 1 comment · Opened Jul 10, 2025
Issue: recv() failed (104: Connection reset by peer) while proxying/upgrading WebSocket in NGINX with Socket.IO Open

needs investigation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

socketio/socket.io#5370 · 3 comments · Opened Jul 7, 2025
Connection State Recovery: Client->Server resync Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

socketio/socket.io#5363 · Opened Jun 23, 2025
Long-lived connections experience false disconnections due to timer reliability issues Open

to triage

Difficulty 5/5 Over a week Newbie friendliness 25/100

socketio/socket.io#5357 · 3 comments · Opened Jun 11, 2025
Pooled memory management currently impossible with socket.io interface Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 32/100

socketio/socket.io#5353 · 7 comments · Opened Jun 2, 2025
Enable logging in Angular Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

socketio/socket.io#5351 · 1 comment · Opened May 18, 2025
Socket.IO not connecting in Chrome browser (HTTPS, custom port 6530) Open

to triage

Difficulty 4/5 3-5 days Newbie friendliness 20/100

socketio/socket.io#5343 · Opened Apr 30, 2025
Issue with .to(room).emitWithAck() Open

question

Difficulty 4/5 3-5 days Newbie friendliness 45/100

socketio/socket.io#5333 · 3 comments · Opened Apr 22, 2025
Errors when using uWebsockets while clients are connected and server restarts Open

to triage

Difficulty 4/5 3-5 days Newbie friendliness 25/100

socketio/socket.io#5330 · 1 comment · Opened Apr 17, 2025
There is a bug in socket.io-client version 4.8.1. Open

needs investigation unable to reproduce

Difficulty 4/5 3-5 days Newbie friendliness 30/100

socketio/socket.io#5327 · 2 comments · Opened Apr 9, 2025
TRANSPORT_HANDSHAKE_ERROR Open

to triage

Difficulty 4/5 3-5 days Newbie friendliness 22/100

socketio/socket.io#5325 · Opened Apr 6, 2025
protocol(engine): Transport does not get updated when upgrade from WebSocket to WebTransport. Open

needs investigation

Difficulty 3/5 1-2 days Newbie friendliness 45/100

socketio/socket.io#5324 · 6 comments · 1 reaction · Opened Apr 3, 2025
Uncaught TypeError: Illegal invocation Open

to triage

Difficulty 3/5 1-2 days Newbie friendliness 35/100

socketio/socket.io#5308 · 4 comments · 1 reaction · Opened Feb 27, 2025
TS: Exported variable X has or is using name Y from external module Z but cannot be named.ts(4023) Open

needs investigation

Difficulty 3/5 1-2 days Newbie friendliness 45/100

socketio/socket.io#5307 · 3 comments · Opened Feb 26, 2025
Socket.IO stops working randomly until page refresh Open

needs investigation

Difficulty 4/5 3-5 days Newbie friendliness 25/100

socketio/socket.io#5299 · 9 comments · Opened Feb 18, 2025
Inconsistent behavior of close packet processing in websocket and polling transports Open

to triage

Difficulty 3/5 1-2 days Newbie friendliness 45/100

socketio/socket.io#5286 · Opened Jan 30, 2025
Connection State Recovery fails for long-lived connections Open

to triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

socketio/socket.io#5282 · 21 comments · Opened Jan 23, 2025
Valkey streams adapter Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

socketio/socket.io#5281 · 7 comments · 3 reactions · Opened Jan 23, 2025
Code logic bugs in engine.io-client Open

to triage

Difficulty 4/5 3-5 days Newbie friendliness 28/100

socketio/socket.io#5274 · Opened Jan 1, 2025
Errors thrown by middlewares do not get captured or reported Open

to triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

socketio/socket.io#5263 · 1 comment · Opened Dec 17, 2024
Event triggered on Connection State Recovery Expiration Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

socketio/socket.io#5250 · 2 comments · Opened Dec 4, 2024
Socket disconnect event doesn't always fire Open

to triage

Difficulty 4/5 3-5 days Newbie friendliness 28/100

socketio/socket.io#5246 · Opened Nov 29, 2024
golang only supports the client version 1.4 Open

to triage

Difficulty 5/5 Over a week Newbie friendliness 15/100

socketio/socket.io#5240 · 4 comments · Opened Nov 27, 2024
Pass WebSocket closure code to Socket.IO Server on "transport close" reason Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

socketio/socket.io#5234 · Opened Nov 21, 2024
Slack link does not resolve Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

socketio/socket.io#5229 · Opened Nov 16, 2024
Better network scaling with adapters Open

question

Difficulty 5/5 Over a week Newbie friendliness 30/100

socketio/socket.io#5226 · 2 comments · 1 reaction · Opened Nov 13, 2024
Events before disconnection dropped Open

needs investigation

Difficulty 3/5 1-2 days Newbie friendliness 42/100

socketio/socket.io#5213 · 7 comments · Opened Oct 20, 2024
socket.io-client 4.8.0 automatic reconnect is not working Open

bug needs investigation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

socketio/socket.io#5197 · 21 comments · 8 reactions · Opened Sep 24, 2024
Express Middleware Errors Do Not Stop Socket.IO Reconnections Open

documentation

Difficulty 3/5 1-2 days Newbie friendliness 42/100

socketio/socket.io#5182 · 2 comments · Opened Sep 7, 2024
Namespaces are contravariant over SocketData because `Namespace['_fns']` is not `private` Open

enhancement package:socket.io

Difficulty 3/5 1-2 days Newbie friendliness 42/100

socketio/socket.io#5179 · 2 comments · Opened Aug 30, 2024
Scaling a Node.js Application with Socket.IO in Kubernetes Open

question

Difficulty 5/5 Over a week Newbie friendliness 15/100

socketio/socket.io#5167 · Opened Aug 12, 2024
SocketIO import on shared worker causes: "Failed to execute 'importScripts' on 'WorkerGlobalScope'" Open

needs investigation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

socketio/socket.io#5160 · 1 comment · Opened Aug 7, 2024
socket.io-client does not work properly in Android(React-Native) with Laravel-echo Open

needs investigation

Difficulty 4/5 3-5 days Newbie friendliness 25/100

socketio/socket.io#5143 · 4 comments · Opened Jul 19, 2024
Iterate over acknowledgements as they arrive Open

enhancement package:socket.io

Difficulty 5/5 Over a week Newbie friendliness 25/100

socketio/socket.io#5136 · Opened Jul 16, 2024
Getting error websocket.js:39 WebSocket connection to 'ws://localhost:3000/socket.io/?EIO=4&transport=websocket' failed: again and again Open

needs investigation

Difficulty 4/5 3-5 days Newbie friendliness 20/100

socketio/socket.io#5027 · 6 comments · Opened May 14, 2024

socketio/socket.io

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