socket io join room
socket.join(room)rooms in socket io
io.on('connection', socket => {
socket.join('some room');
});
//And then simply use to or in (they are the same) when broadcasting or emitting:
io.to('some room').emit('some event');
//You can emit to several rooms at the same time:
io.to('room1').to('room2').to('room3').emit('some event');
//In that case, an union is performed: every socket that is at least in one of the rooms will get the event once (even if the socket is in two or more rooms).
//You can also broadcast to a room from a given socket:
io.on('connection', function(socket){
socket.to('some room').emit('some event');
});Copyright © 2021 Codeinu
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