Creating a Real-Time Chat Application with Node.js and Socket.io

Introduction to Socket.io

Socket.io is a JavaScript library that allows you to create real-time applications. It provides a simple way to establish WebSocket connections between clients and servers.

Step 1: Install Socket.io

Install Socket.io using npm.

npm install socket.io

Step 2: Create a New Express App

Create a new Express app.

const express = require('express');
const app = express();

Step 3: Create a Socket.io Server

Create a Socket.io server.

const server = require('http').createServer(app);
const io = require('socket.io')(server);

Step 4: Handle Socket.io Events

Handle Socket.io events, such as connection and disconnect.

io.on('connection', (socket) => {
  console.log('Client connected');
  socket.on('disconnect', () => {
    console.log('Client disconnected');
  });
});

Step 5: Broadcast Messages

Broadcast messages to all connected clients.

socket.on('message', (message) => {
  io.emit('message', message);
});

Run the code to see the real-time chat application in action.