Understanding WebSockets in Next.js: A Practical Introduction

Real-time applications have become essential in modern web development. Whether you're building a chat app, a collaborative editor, or a notification system, WebSockets offer a powerful way to establish persistent, bidirectional communication between client and server.

In this article, we’ll explore how WebSockets work and how to use them effectively in a Next.js project.

WebSockets are a communication protocol enabling a full-duplex, persistent connection between a client and a server.

Unlike traditional HTTP requests—which are stateless and require a new request for each update—WebSockets keep the connection open, allowing either side to send data at any time.


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// hooks/use-live-feed.tsconst socket = new WebSocket("wss://api.myblog.dev/live");

socket.addEventListener("open", () => {
  console.log("Connection established");
});

socket.addEventListener("message", (event) => {
  const payload = JSON.parse(event.data);
  updateFeed(payload);
});

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Using WebSockets in Next.js

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Using WebSockets in Next.js

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