Socket.io

**See code for socket.io initialization with express

Following code runs on connection

io.on('connection', (socket) => {
    console.log("New WebSocket Connection");
    socket.emit('message', 'Welcome!');
});

Common Actions

Sends to particular connected client socket.emit

Sends to every single connected client io.emit socket.broadcast.emit

Sends to particular connected client socket.emit('countUpdated', count);

io.emit('countUpdated', count);

Send to everyone but that client - ** .to(room) ** specifies the room to connect to

socket.broadcast
      .to(user.room)
      .emit("message", generateMessage("admin",`${user.username} has joined!`));