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Added 30 Aug 2026
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diagonal-scan-sweep-15393
Diagonal Scan Sweep
Backgrounds

Diagonal Scan Sweep

Hatched dark field crossed at an angle by a soft blue scanning bar that fades in at one edge and out at the other.

Backgroundsscansweephatchbeamdiagonal
lines of CSS
46lines of CSS
dependencies
0dependencies
browser, for years
Everybrowser, for years
stops under reduced motion
Guardedstops under reduced motion
Backdrop
Open a live copy in

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

diagonal-scan-sweep-15393.css
.fx-v13-bg-scan-15392 {
  position: relative;
  width: 240px;
  height: 140px;
  border-radius: 0.75rem;
  overflow: hidden;
  background-color: #0f172a;
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(148,163,184,0.10) 0 2px,
    transparent 2px 10px
  );
  box-shadow: 0 0 0 1px rgba(148,163,184,0.2);
}
.fx-v13-bg-scan-15392 span {
  position: absolute;
  top: -60%;
  bottom: -60%;
  left: -30%;
  width: 60px;
  background: linear-gradient(90deg, transparent, rgba(56,189,248,0.55), rgba(224,242,254,0.9), rgba(56,189,248,0.55), transparent);
  filter: blur(3px);
  transform: rotate(18deg);
  animation: fx-v13-bg-scan-15392-pass 3.4s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}
@keyframes fx-v13-bg-scan-15392-pass {
  0%       { left: -30%; opacity: 0; }
  12%      { opacity: 1; }
  70%      { opacity: 1; }
  85%, 100% { left: 105%; opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .fx-v13-bg-scan-15392,
  .fx-v13-bg-scan-15392::before,
  .fx-v13-bg-scan-15392::after,
  .fx-v13-bg-scan-15392 *,
  .fx-v13-bg-scan-15392 *::before,
  .fx-v13-bg-scan-15392 *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    animation-delay: 0ms !important;
    transition-duration: 1ms !important;
    transition-delay: 0ms !important;
  }
}
diagonal-scan-sweep-15393.html
<div class="fx-v13-bg-scan-15392">
  <span></span>
</div>

What do I do with this?

  1. Put diagonal-scan-sweep-15393.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-v13-bg-scan-15392">. 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 diagonal-scan-sweep-15393

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 diagonal-scan-sweep-15393

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
Guarded

Ships a prefers-reduced-motion block, so the loop settles into its end state for visitors who ask for less motion.

What it animates
Reflows

Animates left. The browser re-lays-out the page on every frame; prefer transform if you can.

Flashing (WCAG 2.3.1)
Under 3 flashes/s

Its brightest loop is about 0.3 a second. Estimated from duration, iterations and keyframes, not from rendered frames.

Layout shift (CLS)
May shift layout

Animates left on a box in flow, so content beside or after it can move. 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

46 more effects in Backgrounds

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.

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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 Diagonal Scan Sweep

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