How do you set up a connection between two clients using Node.js?

Setting up a connection between two clients using Node.js often involves creating a WebSocket server. Here's a simplified guide:

Install Required Packages: Use npm to install the 'ws' (WebSocket) package.
```
 bashCopy codenpm install ws
```

Create WebSocket Server: In your Node.js script, create a WebSocket server using the 'ws' package.

 javascriptCopy codeconst WebSocket = require('ws');
 const server = new WebSocket.Server({ port: 3000 });

Handle Connections: Listen for incoming connections and handle each client separately.

 javascriptCopy codeserver.on('connection', (socket) => {
   // Handle messages and other events for each client socket
   socket.on('message', (data) => {
     // Handle incoming messages
     console.log(`Received: ${data}`);
   });
 });

Connect Clients: In the client-side code, use a WebSocket library to connect to the server.
```
 javascriptCopy codeconst socket = new WebSocket('ws://localhost:3000');
```

Send and Receive Data: Both clients can send and receive data through the WebSocket connection.

 javascriptCopy code// Sending data from client
 socket.send('Hello, Server!');

 // Receiving data on the client
 socket.onmessage = (event) => {
   console.log(`Received from server: ${event.data}`);
 };

Close Connections: Ensure to handle the closure of connections gracefully.

 javascriptCopy codesocket.on('close', () => {
   console.log('Connection closed');
 });

Remember to implement error handling and security measures based on your application's requirements. WebSocket connections facilitate real-time communication between clients and can be used for various purposes, such as chat applications, collaborative editing, and gaming.