How do I implement dark mode in my app?

Implementing dark mode in a Next.js app with Tailwind CSS is straightforward. You can use Tailwind's built-in dark mode support by adding the "dark:" prefix to your utility classes.

What approach should I use?

There are two main approaches: class-based and media-based. The class-based approach gives you more control, allowing users to toggle between themes. The media-based approach automatically follows the user's system preferences.

How do I persist the theme choice?

You can use localStorage to save the user's theme preference. When the app loads, check localStorage for the saved theme and apply it. Make sure to handle the initial load to prevent a flash of the wrong theme.