Scroll-Linked CSS Progress Bar Without JavaScript

Use only CSS for progress bar

A progress bar is a perfect example of what’s possible with modern CSS. It leverages the power of animation-timeline: scroll();, which links the animation’s progress directly to your scroll position.

As you scroll down the page, the progress bar fills up in perfect sync with your movement. It’s a subtle but effective way to enhance the user experience.

CSS keyframes also play a crucial role, defining the animation’s behavior. In this case, a simple width change from 0 to 100%.

The result? A smooth, natural animation that feels intuitive and performant.

Plus, CSS animations are:

• Performant (hardware-accelerated)
• Accessible
• Great for reducing JavaScript dependencies

The only downside for now is the browser support. The support for animation-timeline is currently around 73%.

I talk about CSS scroll animations in one of my blog posts. If you want to deep dive into this subject, you can check it out here: https://lnkd.in/eX-tmD6V

<header>
	<div class="progress"></div>
</header>

.progress {
	background: #55ad9b;
	width: 0;
	height: 8px;
	animation: grow linear forwards;
	animation-timeline: scroll();
}

@keyframes grow {
	to {
		width: 100%;
	}
}

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