%202.webp?alt=media&token=7ffdb0b5-c934-43e2-a7a1-029e283cce6f)
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Build a timed text animation that updates one character at a time.
Build the text effect →Testimonial Slider
Build a testimonial slider 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
Testimonial Slider
In this project, we’re going to build a testimonial slider using HTML, CSS, and JavaScript. You’ll see how to move between items and keep the active content synchronized. Along the way, you’ll practice setTimeout, DOM selection, and DOM content updates, so you can understand how the interface and JavaScript logic work together.
02 — Included
- Click-based interactions
- Testimonial Slider 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.
- Keep an internet connection available for external assets.
Project structure
testimonial-slider/
<!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>Testimonial Slider</title>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<div class="testimonial-container">
<img
src="https://images.unsplash.com/photo-1570295999919-56ceb5ecca61?ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=880&q=80"
alt="user-image"
/>
<p class="text">
This is simply unbelievable! I would be lost without Apple. The very
best. Not able to tell you how happy I am with Apple.
</p>
<h4 class="username">Cherise G</h4>
</div>
<script src="index.js"></script>
</body>
</html>
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