Party Popper CSS Button

Free53 lines · no JS · WCAG AA large 4.2

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Theme

A real <button> carrying .btn-party-popper — the preview is the stylesheet, not a picture of it.

States

default

hover

focus-visible

active

disabled

not declared

.btn-party-popper {
  position: relative;
  display: inline-block;
  padding: 12px 28px;
  border: none;
  border-radius: 12px;
  background: #8b5cf6;
  color: #ffffff;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}
.btn-party-popper::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  margin: -3px 0 0 -3px;
  border-radius: 50%;
  opacity: 0;
  pointer-events: none;
}
.btn-party-popper:hover {
  background: #7c3aed;
  transform: scale(1.04);
}
.btn-party-popper:hover::after {
  animation: btn-party-popper-burst 0.7s ease-out forwards;
}
.btn-party-popper:active {
  transform: scale(0.96);
}
@keyframes btn-party-popper-burst {
  0% {
    opacity: 1;
    box-shadow: 0 0 0 #fbbf24, 0 0 0 #34d399, 0 0 0 #f87171, 0 0 0 #60a5fa, 0 0 0 #f472b6, 0 0 0 #facc15, 0 0 0 #a78bfa, 0 0 0 #4ade80;
  }
  70% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    box-shadow: -46px -34px 0 #fbbf24, 42px -40px 0 #34d399, -58px 8px 0 #f87171, 56px 14px 0 #60a5fa, -30px 38px 0 #f472b6, 34px 40px 0 #facc15, 0 -50px 0 #a78bfa, 62px -12px 0 #4ade80;
  }
}
.btn-party-popper:focus-visible {
  outline: 2px solid #8b5cf6;
  outline-offset: 3px;
}

Self-contained · MIT · no build step.btn-party-popper

PlayfulRoundedParticlesHover Reveal

Implementation notes

About the Party Popper CSS button

Party Popper uses expressive color, shape and feedback for characterful products. Its rounded corners balance product-friendly softness with a clear boundary. It pairs a 700ms keyframe animation with a 200ms hover scale. The particles, hover reveal details are included in the copy-paste CSS.

Usage

<button class="btn-party-popper">Party!</button>

Pair it with the CSS tab above — the class is self-contained.

Before shipping: keep the semantic button element, verify contrast on your actual background and add a visible:focus-visible state. If you retain motion, include a prefers-reduced-motion override.

Built with: HTML + plain CSS
Shape: Rounded
Exports: CSS, Tailwind, React
License: MIT · commercial use

Complete the look

Build the interface around this button

We matched its palette, surface, geometry and motion to a complete UI system — like composing an outfit, not browsing unrelated parts.

Style DNA · v1

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Pro preview

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