How to Build a Chat App with WebSockets (Demo)

Real-time messaging made easy using WebSockets, Node.js, and a simple frontend UI. Build your own chat app today!

WebSockets enable two-way communication between the browser and server in real time. You can use Socket.IO to make building chat apps easy.

\

Backend (Node.js + Socket.IO)\

const io = require('socket.io')(3000);
io.on('connection', socket => {
  socket.on('chat message', msg => {
    io.emit('chat message', msg);
  });
 });

Frontend Example

<script>
  const socket = io();
  socket.on('chat message', msg => {
    console.log(msg);
  });
</script>

This can scale with Redis pub/sub for multi-instance apps.