WebSocket

 WebSocket: WebSocket is a protocol that provides a full-duplex communication channel over a single TCP connection. It allows for real-time communication between the client and the server. Here's an example of how to create a WebSocket server using the ws package:

javascript

const WebSocket = require('ws');

const server = new WebSocket.Server({ port: 8080 });

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

  console.log('Client connected');

  socket.on('message', (message) => {

    console.log(`Received message: ${message}`);

    // Echo the message back to the client

    socket.send(`You said: ${message}`);

  });

  socket.on('close', () => {

    console.log('Client disconnected');

  });

});

In this example, we create a WebSocket server using the ws package and listen for client connections. We handle incoming messages and echo them back to the client. We also handle client disconnections.