WebSockets Cheat Sheet

// Create connectionconst socket = new WebSocket('wss://example.com/socket');socket.addEventListener('open', () => {  console.log('Connected');  socket.send('Hello Server!');});socket.addEventListener('message', (event) => {  console.log('Received:', event.data);});socket.addEventListener('close', (event) => {  console.log('Closed:', event.code, event.reason);});socket.addEventListener('error', (event) => {  console.error('WebSocket error:', event);});// Send JSONsocket.send(JSON.stringify({ type: 'chat', text: 'hi' }));// Close gracefullysocket.close(1000, 'Done');

const { WebSocketServer } = require('ws');const wss = new WebSocketServer({ port: 8080 });wss.on('connection', (ws, req) => {  console.log('Client connected:', req.socket.remoteAddress);  ws.on('message', (data) => {    // Broadcast to all connected clients    wss.clients.forEach((client) => {      if (client.readyState === ws.OPEN) {        client.send(data.toString());      }    });  });  ws.on('close', () => console.log('Client disconnected'));  ws.ping(); // heartbeat frame});