AI CSS Animations

Spin

Turns a full circle every second at constant speed, forever. The go-to for a refresh icon or a busy state. Linear timing and a single to keyframe, the same motion as Tailwind's animate-spin.

Also known as: css rotate 360 infinite, spin animation css, infinite rotation.

HTML

<div class="kfa-spin"><svg class="kfa-spin-icon" viewBox="0 0 24 24" aria-hidden="true"><path d="M19.5 12a7.5 7.5 0 1 1-2.2-5.3" /><path d="M19.8 3.8v4h-4" /></svg></div>

CSS

.kfa-spin {
  --c: var(--kfa-color, #3b82f6);
  font-size: var(--kfa-size, 16px);
  display: grid;
  place-items: center;
  width: 5.5em;
  height: 5.5em;
  border-radius: 1em;
  background: var(--c);
  color: #fff;
  font-family: system-ui, sans-serif;
  font-weight: 700;
  box-shadow: 0 0.6em 1.4em -0.6em color-mix(in srgb, var(--c) 70%, transparent);
  animation: kfa-spin-turn 1s linear infinite;
}
.kfa-spin-icon {
  width: 2.4em;
  height: 2.4em;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}
@keyframes kfa-spin-turn {
  to { transform: rotate(360deg); }
}

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

Tailwind CSS version

The same effect using Tailwind utility classes. No custom CSS or config needed.

<div class="grid h-[5.5em] w-[5.5em] animate-spin place-items-center rounded-[1em] bg-blue-500 text-white">
  <svg class="h-[2.4em] w-[2.4em]" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M19.5 12a7.5 7.5 0 1 1-2.2-5.3" /><path d="M19.8 3.8v4h-4" /></svg>
</div>

Customizing this snippet

  • Color: set --kfa-color on the element or a parent. Currently previewing #3b82f6.
  • Base size: set --kfa-size. Every other dimension is in em, so the whole thing scales together. Currently previewing 16px.
  • 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.

Similar keyframe animations

Heartbeat
Pulse
Ping
Float