SocketIO cheat sheet to emit messages through sockets

cheat_sheet_socketio

// SocketIO cheat sheet
// SocketIO is a library that makes websockets communications easier.
// Page: http://socket.io/
// ref: http://stackoverflow.com/a/10099325

// send to current request socket client
socket.emit('message', "this is a test");

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

// sending to individual socketid
io.sockets.socket(socketid).emit('message', 'for your eyes only');

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

// sending to individual socketid
io.sockets.socket(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