Confetti Burst Button: CSS Button Style & Animation

Confetti Burst Button

A celebratory button that pops a ring of confetti from behind itself when hovered: dots and strips fly out, spin, drift down and fade. Ten plain elements, each with its own vector.

Also known as: confetti button css, party popper hover, particle burst button.

Color Base size 18px Dark background Hold hover state

HTML

<button class="btn-confetti-burst">
  <span class="btn-confetti-burst-bits" aria-hidden="true">
    <i style="--x:6.2em;--y:-0.3em"></i><i style="--x:4.8em;--y:1.8em"></i><i style="--x:2em;--y:2.6em"></i><i style="--x:-1.6em;--y:2.9em"></i><i style="--x:-4.9em;--y:1.6em"></i><i style="--x:-6.4em;--y:0.2em"></i><i style="--x:-5em;--y:-1.7em"></i><i style="--x:-2.2em;--y:-2.7em"></i><i style="--x:1.4em;--y:-3em"></i><i style="--x:4.6em;--y:-2em"></i>
  </span>
  <span class="btn-confetti-burst-face">Celebrate</span>
</button>

CSS

.btn-confetti-burst {
  --c: var(--btn-color, #3b82f6);
  position: relative;
  padding: 0;
  border: 0;
  background: transparent;
  font: 600 var(--btn-size, 18px)/1.2 system-ui, sans-serif;
  cursor: pointer;
}
.btn-confetti-burst-face {
  position: relative;
  display: block;
  padding: 0.8em 1.9em;
  border-radius: 0.6em;
  background: var(--c);
  color: #fff;
}
.btn-confetti-burst-bits i {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.45em;
  height: 0.45em;
  margin: -0.225em;
  border-radius: 50%;
  background: var(--c);
  opacity: 0;
}
.btn-confetti-burst-bits i:nth-child(3n + 2) {
  width: 0.3em;
  height: 0.6em;
  border-radius: 0.08em;
  background: color-mix(in srgb, var(--c) 30%, #f43f5e);
}
.btn-confetti-burst-bits i:nth-child(3n) { background: color-mix(in srgb, var(--c) 20%, #fbbf24); }
.btn-confetti-burst:is(:hover, :focus-visible) .btn-confetti-burst-face {
  animation: btn-confetti-burst-pop 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.btn-confetti-burst:is(:hover, :focus-visible) .btn-confetti-burst-bits i {
  animation: btn-confetti-burst-fly 1s cubic-bezier(0.2, 0.7, 0.3, 1) both;
}
.btn-confetti-burst:is(:hover, :focus-visible) .btn-confetti-burst-bits i:nth-child(even) { animation-delay: 0.05s; }
@keyframes btn-confetti-burst-fly {
  0%   { opacity: 1; transform: translate(0, 0) scale(0.4) rotate(0deg); }
  65%  { opacity: 1; transform: translate(var(--x), var(--y)) scale(1) rotate(200deg); }
  100% { opacity: 0; transform: translate(var(--x), calc(var(--y) + 0.9em)) scale(0.8) rotate(280deg); }
}
@keyframes btn-confetti-burst-pop {
  40% { transform: scale(0.93); }
}

@media (prefers-reduced-motion: reduce) {
  .btn-confetti-burst, .btn-confetti-burst *, .btn-confetti-burst::before, .btn-confetti-burst::after, .btn-confetti-burst *::before, .btn-confetti-burst *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

Customizing this snippet

Color: set --btn-color on the element or a parent. Currently previewing #3b82f6.
Base size: set --btn-size. Every other dimension is in em, so the whole thing scales together. Currently previewing 18px.
Speed: change the duration on the transition or animation shorthand. Staggered delays are relative, so they keep their rhythm.
Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.

Confetti Burst Button

HTML

CSS

Customizing this snippet

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