Neon Progress Bar Animation Tutorial

Want to add a glowing, modern touch to your website UI? In this tutorial, you'll learn how to create a smooth neon progress bar animation using only HTML, CSS, and JavaScript. Perfect for download/upload indicators or loading animations in dark-themed designs.

🔧 What We'll Build

A progress bar that:

Glows with a neon gradient
Expands smoothly from 0% to 100%
Simulates upload or download progress
Is built without any external libraries

🧱 HTML Structure

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Neon Progress Bar</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <h2>Neon Progress Bar</h2>
    <div class="progress-container">
        <div class="progress-bar">0%</div>
    </div>

    <button class="submit-btn">Submit</button>

    <script src="app.js"></script>
</body>
</html>

🎨 CSS for Neon Style

*{
    margin: 0;
    padding: 0;
}

body{
    background-color: #0f0f0f;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
}

h2{
    color: #00ffe7;
    text-shadow: 0 0 10px #00ffe7;
}

.progress-container{
    width: 80%;
    background-color: #1e1e1e;
    border-radius: 20px;
    overflow: hidden;
    height: 30px;
    box-shadow: 0 0 10px #00ffe7;
    margin: 20px 0;
}

.progress-bar{
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #00ffe7,#00ff99);
    color: #fff;
    text-align: center;
    line-height: 30px;
    font-weight: bold;
    border-radius: 20px 0 0 20px;
    transition: width 0.3s ease;
}

.submit-btn{
    padding: 12px 25px;
    background: #00ffe7;
    border: none;
    color: #fff;
    font-size: 16px;
    border-radius: 10px;
    cursor: pointer;
    box-shadow: 0 0 15px #00ffe7;
    transition: all 0.3s ease;
    font-weight: bold;
}

.submit-btn:hover{
    background: #00ff99;
    box-shadow: 0 0 20px #00ff99;
}

⚙️ JavaScript to Animate Progress

const btn = document.querySelector('.submit-btn');
const progressBar = document.querySelector('.progress-bar');

btn.addEventListener('click', () => {
    let progress = 0;

    const interval = setInterval(() => {
        if(progress >= 100){
            clearInterval(interval);
            progressBar.textContent = 'Complete!';
            progressBar.style.color = '#fff';
        } else {
            progress++;
            progressBar.style.width = progress + '%';
            progressBar.textContent = progress + '%';
        }
    }, 50);
});

🚀 Final Result

Click the Submit button and the neon progress bar will animate from 0% to 100% with a glowing effect.

💡 Tip

Use this effect in dark-mode UIs to draw attention to loading states or actions. You can also adjust the gradient colors and glow intensity for different vibes.

Happy coding! ✨

Create a Neon Progress Bar Animation with HTML, CSS, and JavaScript