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WebSockets in Next.js & React: Build Real-Time Features Without a Library

How to add live chat, real-time notifications, and collaborative features using WebSockets — from raw implementation to production-ready patterns with Next.js App Router.

Published
Reading time
7 min read
Written by
Rakesh · DEVMANUSH RAKY
WebSockets in Next.js & React: Build Real-Time Features Without a Library

HTTP is great for requesting data, but for chat apps, live notifications, or collaborative editing, you need a bi-directional persistent connection: WebSockets.

The WebSocket Lifecycle

Managing a WebSocket connection requires careful handling of the handshake, message parsing, and the inevitable reconnection logic when the client moves between networks.

const socket = new WebSocket('ws://localhost:8080');

socket.onopen = () => console.log('Connected');
socket.onmessage = (event) => {
  const data = JSON.parse(event.data);
  updateUI(data);
};

Scaling Real-time

When scaling to multiple servers, you need a pub/sub mechanism like Redis to synchronize state across all WebSocket nodes. This ensures that a user on Server A can communicate with a user on Server B.

  • WebSockets
  • Real-time
  • Node.js
  • React
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