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Added 29 Jul 2026
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btn-liquid
Liquid Wave Button
Buttons

Liquid Wave Button

Featured

A teal wave rises from the bottom and floods the button on hover, with the text color flipping to white.

Buttons
lines of CSS
28lines of CSS
dependencies
0dependencies
browser, for years
Everybrowser, for years
motion only on interaction
Hovermotion only on interaction
Backdrop
Open a live copy in

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

btn-liquid.css
.fx-btn-liquid {
  position: relative;
  isolation: isolate;
  padding: 0.85rem 2rem;
  border: none;
  border-radius: 0.625rem;
  background: transparent;
  color: #0f766e;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  overflow: hidden;
  transition: color 0.4s ease 0.1s;
}
.fx-btn-liquid::before {
  content: '';
  position: absolute;
  left: 0;
  bottom: -100%;
  width: 100%;
  height: 200%;
  background: #14b8a6;
  border-radius: 50% 50% 0 0;
  transition: bottom 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
  z-index: -1;
}
.fx-btn-liquid:hover { color: #fff; }
.fx-btn-liquid:hover::before { bottom: 0; border-radius: 0; }
btn-liquid.html
<button class="fx-btn-liquid">Dive in</button>

What do I do with this?

  1. Put btn-liquid.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-btn-liquid">. 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 btn-liquid

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 btn-liquid

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
Reflows

Animates bottom (and color). The browser re-lays-out the page on every frame; prefer transform if you can.

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)
May shift layout

Animates bottom 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

62 more effects in Buttons

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 Buttons

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 Liquid Wave Button

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