Best matchRelated: Local StorageIntermediate
Multiplication App
Save interface data and restore it between browser sessions.
Build a multiplication app →Dark Mode Toggle
Build a dark mode toggle with HTML, CSS, and JavaScript while practicing local storage and input events.
Intermediate30–45 minutesHTML5CSS3JavaScript
You’ll practice
Local StorageInput EventsDOM Selection
01 — What you’ll build
Dark Mode Toggle
This project shows you how HTML, CSS, and JavaScript work together in a dark mode toggle. You’ll connect user interactions to visible changes on the page, then practice local storage, input events, and DOM selection as you build the complete project from scratch.
02 — Included
- Data saved in the browser
- Dark Mode Toggle interface
- Responsive HTML and CSS layout
- Complete source code and live demo
03 — You’ll practice
- Save and restore data with localStorage
- Respond to input changes
- Select HTML elements from the DOM
- Control behavior with conditions
Recommended knowledge: Basic HTML and CSS, JavaScript objects and arrays, JSON basics, JavaScript variables and number operations.
Complete project files
Build It from the Source Code
This project saves its data between browser sessions.
- 1Create 3 files
- 2Copy the code
- 3Run
index.html
Before you run it
- Saved data stays in this browser through local storage.
Project structure
dark-mode-toggle/
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Dark Mode Toggle</title>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<input type="checkbox" id="dark-mode" class="input" />
<label for="dark-mode" class="label">
<div class="circle"></div>
</label>
<script src="index.js"></script>
</body>
</html>
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