MDX Hot Reload

To make Next.js blog page hot reloads while editing the .mdx file

The Problem

If you have a blog created with Next.js and MDX either using mdx-bundler or next-mdx-remote (maybe there's more libs with the same issue), you must've experienced the dreaded manual refresh every time you want to see some changes. The hot reload or fast refresh doesn't work because we are not directly changing a JavaScript or TypeScript files.

With this short article, I'll show you how to enable hot-reload for your blog page by listening to mdx file changes.

Install next-remote-refresh

This library enables hot reload by utilizing websocket by listening to folder changes.

yarn add next-remote-refresh
bash

Update next.config.js

const path = require('path');
 
const withRemoteRefresh = require('next-remote-refresh')({
  // Configure your Next.js project to watch the files you want to refresh
  paths: [path.resolve(__dirname, 'src', 'contents')],
});
 
/**
 * @type {import('next').NextConfig}
 */
const nextConfig = {
  // ... your config
};
 
module.exports = withRemoteRefresh(nextConfig);
tsx

I'm listening changes for all files inside src/contents folder.

Add the hook to _app.tsx

import { useRemoteRefresh } from 'next-remote-refresh/hook';
 
function MyApp({ Component, pageProps }: AppProps) {
  useRemoteRefresh();
 
  return <Component {...pageProps} />;
}
 
export default MyApp;
tsx

It should work now!