AI CSS Animations

Dot Circle Fill Loader

Twelve faint dots around a circle light up one by one with a little pop until the ring is full, then go dark in the same order. A countdown feel that suits timed waits and retries.

Also known as: dots appearing in a circle, dot clock loader, filling dots ring.

HTML

<div class="ldr-dot-circle-fill" role="status" aria-label="Loading">
  <span style="--i:0"></span><span style="--i:1"></span><span style="--i:2"></span><span style="--i:3"></span>
  <span style="--i:4"></span><span style="--i:5"></span><span style="--i:6"></span><span style="--i:7"></span>
  <span style="--i:8"></span><span style="--i:9"></span><span style="--i:10"></span><span style="--i:11"></span>
</div>

CSS

.ldr-dot-circle-fill {
  --s: var(--ldr-size, 48px);
  --c: var(--ldr-color, #3b82f6);
  --d: calc(var(--s) / 6.5);
  position: relative;
  width: var(--s);
  height: var(--s);
}
.ldr-dot-circle-fill span {
  position: absolute;
  inset: 0;
  transform: rotate(calc(var(--i) * 30deg));
}
.ldr-dot-circle-fill span::before,
.ldr-dot-circle-fill span::after {
  content: "";
  position: absolute;
  top: 0;
  left: calc(50% - var(--d) / 2);
  width: var(--d);
  height: var(--d);
  border-radius: 50%;
}
.ldr-dot-circle-fill span::before {
  background: color-mix(in srgb, var(--ldr-color, #3b82f6) 22%, transparent);
}
.ldr-dot-circle-fill span::after {
  background: var(--c);
  transform: scale(0);
  animation: ldr-dot-circle-fill-pop 2.4s infinite;
  animation-delay: calc(var(--i) * 0.1s - 2.4s);
}
@keyframes ldr-dot-circle-fill-pop {
  0%        { transform: scale(0); animation-timing-function: cubic-bezier(0.3, 1.6, 0.6, 1); }
  8%, 50%   { transform: scale(1); animation-timing-function: cubic-bezier(0.6, 0, 0.8, 0.4); }
  58%, 100% { transform: scale(0); }
}

@media (prefers-reduced-motion: reduce) {
  .ldr-dot-circle-fill, .ldr-dot-circle-fill *, .ldr-dot-circle-fill::before, .ldr-dot-circle-fill::after, .ldr-dot-circle-fill *::before, .ldr-dot-circle-fill *::after {
    animation-duration: 3s;
  }
}

Customizing this loader

  • Color: set --ldr-color on the element or a parent. Currently previewing #3b82f6.
  • Size: set --ldr-size. Every dimension in the snippet is derived from it. Currently previewing 64px.
  • Speed: change the duration on the animation shorthand. Delays on the children are relative, so they keep their rhythm.
  • Accessibility: the root carries role="status" and an aria-label so screen readers announce the wait. The reduced-motion rule at the end slows the animation for users who asked for less motion.

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