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<script src="/socket.io/socket.io.js"></script> <script> const socket = io(); </script>

invalidThis doesn't seem rightThis doesn't seem right

Status: Open.

#5448 In socketio/socket.io;

· quanghuynh10111-png opened on Jan 20, 2026

Incorrect acknowledgment callback signature when emitting before connection with ackTimeout option

to triageWaiting to be triaged by a member of the teamWaiting to be triaged by a member of the team

Status: Open.

#5446 In socketio/socket.io;

· rbgmulmb opened on Jan 18, 2026

redis-streams-adapter: receives events but room emits don’t reach clients

questionFurther information is requestedFurther information is requested

Status: Open.

#5445 In socketio/socket.io;

· bakikucukcakiroglu opened on Jan 18, 2026

Possibiliity of Bug in Socket.io in which io.to(roomName).emit() not fires sometimes

questionFurther information is requestedFurther information is requested

Status: Open.

#5444 In socketio/socket.io;

· itsxwang opened on Jan 17, 2026

Could not find a declaration file for module 'ws'

to triageWaiting to be triaged by a member of the teamWaiting to be triaged by a member of the team

Status: Open.

#5437 In socketio/socket.io;

· WvKuipersVisma opened on Jan 5, 2026

Korean Docs Request

enhancementNew feature or requestNew feature or request

Status: Open.

#5427 In socketio/socket.io;

· nayounsang opened on Dec 16, 2025

Send message to a Set<Room>

enhancementNew feature or requestNew feature or request

Status: Open.

#5418 In socketio/socket.io;

· floriannari opened on Nov 17, 2025

Missing dependency <code>socket.io-adapter</code> in <code>@socket.io/redis-streams-emitter</code> 0.1.0

enhancementNew feature or requestNew feature or request

Status: Open.

#5414 In socketio/socket.io;

· fjeldstad opened on Nov 6, 2025

TypeScript type breakage under pnpm / preserveSymlinks=true due to extending Emitter from another package

needs investigation

Status: Open.

#5411 In socketio/socket.io;

· anthonyalayo opened on Nov 3, 2025

WebSocket disconnects after hours of uptime, then enters reconnect loop with "Invalid frame header"

needs investigation

Status: Open.

#5404 In socketio/socket.io;

· Yago-Tavares opened on Oct 23, 2025

Leave multiple rooms at once

enhancementNew feature or requestNew feature or request

Status: Open.

#5391 In socketio/socket.io;

· ZachHaber opened on Sep 9, 2025

onAny bypass AsyncLocalStorage middleware

questionFurther information is requestedFurther information is requested

Status: Open.

#5386 In socketio/socket.io;

· PolyFlyx-EFerry opened on Sep 1, 2025