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@crtr0
Created June 8, 2012 17:02
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A simple example of setting-up dynamic "rooms" for socket.io clients to join
// set-up a connection between the client and the server
var socket = io.connect();
// let's assume that the client page, once rendered, knows what room it wants to join
var room = "abc123";
socket.on('connect', function() {
// Connected, let's sign-up for to receive messages for this room
socket.emit('room', room);
});
socket.on('message', function(data) {
console.log('Incoming message:', data);
});
// attach Socket.io to our HTTP server
io = socketio.listen(server);
// handle incoming connections from clients
io.sockets.on('connection', function(socket) {
// once a client has connected, we expect to get a ping from them saying what room they want to join
socket.on('room', function(room) {
socket.join(room);
});
});
// now, it's easy to send a message to just the clients in a given room
room = "abc123";
io.sockets.in(room).emit('message', 'what is going on, party people?');
// this message will NOT go to the client defined above
io.sockets.in('foobar').emit('message', 'anyone in this room yet?');
@ArnaldoLucienTema
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A great example, simple and useful. Thank you sir.

@zahidtariq
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Can anyone tell me that how we can randomly adjust the sockets to different rooms at the same time not one room?

@zahidtariq
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A great example, simple and useful. Thank you sir.

Can YOu tell me that how we can randomly adjust the sockets to different rooms at the same time not one room?

@jeffmanful
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Thanks 👍

@tylim88
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tylim88 commented Apr 13, 2019

this example make thing simpler

@tgrlbyrk
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great example thanks!

@ldilshan
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ldilshan commented May 9, 2019

Anyone can tell me how to assign users from the db or active users in to specific Room. Where can we handle that?

thanks

@uplankita
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Thank you for a great example

@gudu1998
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gudu1998 commented May 5, 2020

This is definitely helpful!
Socket.io's docs don't provide much info about this.

Yeah socket.io docs is very bad .For basic knowledge of socket.io tutorial point is best

@FrankDev-327
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server.js line 13 room = "abc123"; - is it hardcode? if so, it's seems to me stupid.

it's an example.

@suprth
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suprth commented Nov 17, 2020

Many thanks!

@0xPranavDoshi
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Any idea on how to add other users to the room using their socketid.

@aandrade01
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In the client, how to receive only the messages of the room that was created?
Because in the way you gave as an example, the client receives any message and not just from the created room.

Thanks

@sharmavivek223
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How can i join room at backend with io instance and not socket instance?

@Roman-Vala
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Roman-Vala commented Apr 3, 2022

How can i join room at backend with io instance and not socket instance?

Hi, I think you can, if you put your room you want to join in in the query (room:"abc123") then your server will read it upon connection
as socket.handshake.query.room;
then join the appropriate room.

@C0rellana
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Thanks!!

@SulaimanAminuBarkindo
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In the client, how to receive only the messages of the room that was created? Because in the way you gave as an example, the client receives any message and not just from the created room.

Thanks
The client will get the roomId from the server so the client will output the message to room with the roomId

@milindmore
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Nice Tutorial, video is too good .

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