Create a Theme Toggler (Dark & Light Mode) Using JavaScript

Published: 06 September 2025
on channel: Code Nest

136

In this tutorial, you’ll learn how to add a Dark Mode / Light Mode switch button to any website using HTML, CSS, and JavaScript. We’ll create a modern switch toggle button, add a smooth transition effect, and even save the user’s preference with localStorage so the theme stays after refresh.

This is a perfect beginner-friendly JavaScript project that makes your website look professional and modern.

🔗 What you’ll learn:

1. How to build a switch button with HTML & CSS
2. How to toggle Dark/Light Mode with JavaScript
3. How to remember theme preference using localStorage
4. How to add smooth animations for a clean UI

👉 Watch till the end and follow along to build your own theme switcher!

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Create a Theme Switcher (Dark & Light Mode) Using JavaScript

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