Tailwind CSS v4 Dark Mode Toggle Tutorial in ReactJS

Learn how to implement a dark mode toggle using Tailwind CSS v4 in ReactJS with this simple tutorial. Upgrade your website's design with this easy-to-follow guide!

We’ll build a theme switcher from scratch, style it using Tailwind's new dark variant, and persist the user’s theme preference using localStorage.

This is a perfect beginner-friendly project to upgrade your UI skills in 2025 with the latest Tailwind CSS version.

📚 What You’ll Learn:
🔸How to set up a React app with Vite and Tailwind CSS v4
🔸How Tailwind v4 handles dark mode with custom variants
🔸Building a dark/light mode toggle button in React
🔸Using Lucide icons for theme indicators (sun/moon)
🔸Applying conditional Tailwind styles for dark mode
🔸Persisting the selected theme with localStorage
🔸Using useEffect to load the saved theme on app start
🔸Making a clean and responsive UI with Tailwind

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🏷️ Hashtags:
#reactjs #tailwindcss #darkmode #reacttutorial #frontenddevelopment #webdevelopment #vite #tutorial #coding