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Added 4 Aug 2026
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ocean-reading-progress-7151
Ocean Reading Progress
Scroll & Sticky

Ocean Reading Progress

Sticky ocean progress bar driven by scroll-timeline — it tracks the scroll with no listener.

Scroll & Stickyscroll progressreading progressscroll-timelinescroll drivenocean
lines of CSS
37lines of CSS
dependencies
0dependencies
browsers — needs a fallback
Mostbrowsers — needs a fallback
motion only on interaction
Hovermotion only on interaction
Backdrop

Scroll me. The bar above is driven by this box's own scroll position — no scroll listener, no JavaScript at all.

Where animation-timeline isn't supported the bar simply sits full width.

Open a live copy in

Vue, Svelte, styled-components and Tailwind exports are part of Pro. HTML, CSS and React are free forever.

ocean-reading-progress-7151.css
.fx-sc-prog-ocean-7150 {
  position: relative;
  width: 260px;
  max-height: 150px;
  overflow-y: auto;
  padding: 0 0.8rem 0.8rem;
  border-radius: 0.7rem;
  background: #0f172a;
  border: 1px solid rgba(255,255,255,0.07);
  scroll-timeline: --fx-sc-prog-ocean-7150-sc block;
}
.fx-sc-prog-ocean-7150 .bar {
  position: sticky;
  top: 0;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, #0ea5e9, #6366f1);
  transform-origin: left;
  animation: fx-sc-prog-ocean-7150-grow linear;
  animation-timeline: --fx-sc-prog-ocean-7150-sc;
}
.fx-sc-prog-ocean-7150 p {
  font-size: 0.8rem;
  line-height: 1.6;
  color: #cbd5e1;
}
.fx-sc-prog-ocean-7150 code {
  font-size: 0.75rem;
  color: #6366f1;
  background: rgba(99,102,241, 0.12);
  padding: 0.05rem 0.3rem;
  border-radius: 0.25rem;
}
@keyframes fx-sc-prog-ocean-7150-grow {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}
ocean-reading-progress-7151.html
<div class="fx-sc-prog-ocean-7150">
  <div class="bar"></div>
  <p>Scroll me. The bar above is driven by this box's own scroll position — no scroll listener, no JavaScript at all.</p>
  <p>Where <code>animation-timeline</code> isn't supported the bar simply sits full width.</p>
</div>

What do I do with this?

  1. Put ocean-reading-progress-7151.css anywhere your page already loads CSS from — in Next.js that is app/globals.css, or any stylesheet with a <link> in your HTML.
  2. Then put the class on the element you want it on: <button class="fx-sc-prog-ocean-7150">. The CSS does nothing until a class name in it matches something on the page.
  • Link the stylesheet, then paste the markup wherever you need it.
npx hoverlab add ocean-reading-progress-7151

What's included

  • The markup and the stylesheet, in whichever framework you pick
  • No runtime dependencies

Works with

  • React
  • Vue
  • Svelte
  • Tailwind
  • styled-components
  • Plain CSS

npx hoverlab add ocean-reading-progress-7151

Or over MCP, from your editor's agent — no account needed.

License

Free to read, copy and install, for personal and non-commercial projects. Shipping it in client work or a paid product needs Pro ($79 once). The source lands in your repo and stops being ours — no attribution, nothing to upgrade.

Was this useful?

Motion safety

Static estimate, read from the CSS

Reduced motion
Brief motion, no guard

Animates briefly or on interaction. Only looping motion gets a guard in this catalog; copy the one from the Insights tab if this ships on a critical path.

What it animates
Compositor only

Only transform, opacity or filter: the GPU can run it without re-laying-out or repainting the page.

Flashing (WCAG 2.3.1)
No flashing found

No repeating change in opacity, colour or brightness large enough to count as a flash.

Layout shift (CLS)
No shift expected

Nothing it animates moves or resizes the box in flow. A category from the CSS, not a measurement for this effect.

Every row is read from the shipped CSS. Only a figure marked measured came from a browser. Customizing the speed changes the timing, so recheck a customized copy. How it is computed

30 more effects in Scroll & Sticky

All of them free to read, copy and install — no account, no locked tiles, no watermarked preview. The whole catalog is open, and so are the API and the CLI.

Browse Scroll & Sticky

Shipping one commercially

Copying the code is free. Putting it in client work or a paid product is what Pro is for — the licence, not the access.

  • A commercial licence for everything in the catalog
  • Unlimited bundle exports, in Vue, Svelte and Tailwind
  • One payment — no subscription, nothing to renew
Pro — $79 once

7 variations of Ocean Reading Progress

Finished looks, each one a position in the customizer above. Copy any of them, or open it and keep moving the sliders.