Tailwind v4 + Nextjs: How to Build Dark Mode with Theme Switching

Dark mode is no longer just a nice-to-have; it's a user expectation. With Tailwind CSS v4 and next-themes, implementing it has never been easier.

Setting up next-themes

First, install the package and wrap your application in the ThemeProvider. This handles the system preference detection and manual toggling.

Tailwind Configuration

Tailwind v4 simplifies the configuration. You can now use the 'dark' variant directly in your classes without complex setup.

Follow along to build a beautiful, theme-aware UI.