Best matchRelated: setTimeoutBeginner
Auto Text Effect Animation
Build a timed text animation that updates one character at a time.
Build the text effect →Loading Bar
Build a loading bar with HTML, CSS, and JavaScript while practicing setTimeout and DOM selection.
Beginner20–30 minutesHTML5CSS3JavaScript
You’ll practice
setTimeoutDOM SelectionDOM Content Updates
01 — What you’ll build
Loading Bar
This project shows you how HTML, CSS, and JavaScript work together in a loading bar. You’ll connect user interactions to visible changes on the page, then practice setTimeout, DOM selection, and DOM content updates as you build the complete project from scratch.
02 — Included
- Click-based interactions
- Loading Bar interface
- Responsive HTML and CSS layout
- Complete source code and live demo
03 — You’ll practice
- Delay actions with setTimeout
- Select HTML elements from the DOM
- Update content on the page
- Control behavior with conditions
- Perform calculations with JavaScript
Recommended knowledge: Basic HTML and CSS, JavaScript functions and callbacks, Browser timers, JavaScript variables and number operations.
Complete project files
Build It from the Source Code
This project uses timed JavaScript updates.
- 1Create 3 files
- 2Copy the code
- 3Run
index.html
Before you run it
- Leave the tab open to see the timed behavior update.
Project structure
loading-bar/
<!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>Loading Bar</title>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<div class="container">
<h1>Loading</h1>
<div class="counter">0%</div>
<hr class="loading-bar-back" />
<hr class="loading-bar-front" />
</div>
<script src="index.js"></script>
</body>
</html>
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