static/index.html

<script src="https://cdn.socket.io/4.3.1/socket.io.min.js"></script>
<script>
const socket = io();
socket.on('connect', () => {
  console.log('Connected to server');
  socket.emit('welcome', 'Hello server');
});
socket.on('welcome', (message) => {
  console.log('Received welcome message:', message);
  // Handle the received message here
});
</script>