Combination Lock Spinner
Three notched rings scramble in different directions, then line up so the notches form one open channel and the centre lights, like a lock clicking open. Angles come from custom properties.
Also known as: aligning rings loader, triple ring spinner, concentric rings with gap.
HTML
<svg class="ldr-aligning-rings" viewBox="0 0 48 48" role="status" aria-label="Loading"> <circle class="ldr-aligning-rings-outer" cx="24" cy="24" r="20" pathLength="100"></circle> <circle class="ldr-aligning-rings-middle" cx="24" cy="24" r="14" pathLength="100"></circle> <circle class="ldr-aligning-rings-inner" cx="24" cy="24" r="8" pathLength="100"></circle> <circle class="ldr-aligning-rings-dot" cx="24" cy="24" r="2.5"></circle> </svg>
CSS
.ldr-aligning-rings {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
width: var(--s);
height: var(--s);
}
.ldr-aligning-rings circle {
fill: none;
stroke: var(--c);
stroke-width: 3.5;
stroke-linecap: round;
transform-origin: center;
animation: ldr-aligning-rings-turn 3s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
/* Every gap is the same width in pixels and sits at 12 o'clock (75 of 100) when aligned. */
.ldr-aligning-rings-outer { stroke-dasharray: 93 7; stroke-dashoffset: -78.5; --a: 200deg; --b: -70deg; --z: 360deg; }
.ldr-aligning-rings-middle { stroke-dasharray: 90 10; stroke-dashoffset: -80; --a: -150deg; --b: 95deg; --z: 0deg; opacity: 0.75; }
.ldr-aligning-rings-inner { stroke-dasharray: 83 17; stroke-dashoffset: -83.5; --a: 110deg; --b: -160deg; --z: -360deg; opacity: 0.5; }
.ldr-aligning-rings .ldr-aligning-rings-dot {
fill: var(--c);
stroke: none;
animation-name: ldr-aligning-rings-lit;
}
@keyframes ldr-aligning-rings-turn {
0%, 12% { transform: rotate(0deg); }
38%, 48% { transform: rotate(var(--a)); }
74%, 84% { transform: rotate(var(--b)); }
100% { transform: rotate(var(--z)); }
}
@keyframes ldr-aligning-rings-lit {
0%, 12% { opacity: 1; transform: scale(1.2); }
22%, 90% { opacity: 0.25; transform: scale(0.8); }
100% { opacity: 1; transform: scale(1.2); }
}
@media (prefers-reduced-motion: reduce) {
.ldr-aligning-rings, .ldr-aligning-rings *, .ldr-aligning-rings::before, .ldr-aligning-rings::after, .ldr-aligning-rings *::before, .ldr-aligning-rings *::after {
animation-duration: 3s;
}
}Customizing this loader
- Color: set
--ldr-coloron the element or a parent. Currently previewing#3b82f6. - Size: set
--ldr-size. Every dimension in the snippet is derived from it. Currently previewing64px. - Speed: change the duration on the
animationshorthand. Delays on the children are relative, so they keep their rhythm. - Accessibility: the root carries
role="status"and anaria-labelso screen readers announce the wait. The reduced-motion rule at the end slows the animation for users who asked for less motion.