A quick cheatsheet for socket.io

socket-cheatsheet.js

// sending to sender-client only
socket.emit('message', "this is a test");

// sending to all clients, include sender
io.emit('message', "this is a test");

// sending to all clients except sender
socket.broadcast.emit('message', "this is a test");

// sending to all clients in 'game' room(channel) except sender
socket.broadcast.to('game').emit('message', 'nice game');

// sending to all clients in 'game' room(channel), include sender
io.in('game').emit('message', 'cool game');

// sending to sender client, only if they are in 'game' room(channel)
socket.to('game').emit('message', 'enjoy the game');

// sending to all clients in namespace 'myNamespace', include sender
io.of('myNamespace').emit('message', 'gg');

// sending to individual socketid (server-side)
socket.broadcast.to(socketid).emit('message', 'for your eyes only');

// join to subscribe the socket to a given channel (server-side):
socket.join('some room');

// then simply use to or in (they are the same) when broadcasting or emitting (server-side)
io.to('some room').emit('some event'):

// leave to unsubscribe the socket to a given channel (server-side)
socket.leave('some room');

In the most recent version of socket.io, I think they changed this:

// sending to individual socketid (server-side)
socket.broadcast.to(socketid).emit('message', 'for your eyes only');

to this

// sending to individual socketid (private message)
io.to(`${socketId}`).emit('hey', 'I just met you');

Emit cheatsheet

can you please tell me , if i want to send message from one client to another client by user id and session ID how i can send in JAVA .b I'm using socket IO server side. @alexpchin

THAAAAANKS!!!!!!!!!!!!!

Thanks alot you are awesome
www.sultan.org

how to save persistant socket IDs in my app then send from specific socket to specific socket?

Hi guys, is there a way to send to everyone in a channel but one specific socket id?
I mean I want to emit a message to everyone but one person who is not the sender. Is it possible I wonder?

thanks a lot.

Thanks

This is amazing thank you very much!

Good buddy