io.on('connection', (socket) => {

  console.log('A frontend client connected');

​

  // Listen for join events from clients

  socket.on('join', (username) => {

    console.log('New client joined:', username);

​

    // Add the client to the connected clients list

    connectedClients.push(socket);

​

    // Emit the updated list of clients to all connected clients

    io.emit('clients', connectedClients);

​

    // You can also send a welcome message to the newly joined client

    socket.emit('message', `Welcome, ${username}!`);

  });

​

  // ...

});