如何获取 Socket.IO 房间内的客户端计数？ 版本 3.1.1

Question

In Version 2.xx it was possible to write

socket.in('room_id').clients((err, clients) => clients.length);

Is there a similar way to this in Version 3.1.1 / 3.xx?

I know about the join-room and leave-room events, but i hope for a solution without own counting logic.

Answer 1

After some research i found out they simply renamed it into "allSockets" and changed it a little bit. The new solution now looks like this:

let length = await socket.in('room_id').allSockets().length;