How do I implement dark mode using Tailwind CSS?

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 are the setup steps?

First, enable dark mode in your tailwind.config.js with 'darkMode: class'. Then, create a ThemeProvider component to manage the theme state and toggle functionality.

How do I persist the user's theme preference?

You can use localStorage to save the user's theme preference. When the app loads, check localStorage for the saved theme and apply it. This prevents the flash of the wrong theme on page load.