Infinity Loader
A stroke chases itself around an infinity symbol on top of a faint track. The SVG path uses pathLength so the dash math is in round numbers.
Also known as: figure eight loader, infinite loop animation.
HTML
<svg class="ldr-infinity" viewBox="0 0 100 50" role="status" aria-label="Loading"> <path class="ldr-infinity-track" pathLength="100" d="M50 25 C50 5 15 5 15 25 C15 45 50 45 50 25 C50 5 85 5 85 25 C85 45 50 45 50 25" fill="none" stroke-width="5" /> <path class="ldr-infinity-run" pathLength="100" d="M50 25 C50 5 15 5 15 25 C15 45 50 45 50 25 C50 5 85 5 85 25 C85 45 50 45 50 25" fill="none" stroke-width="5" /> </svg>
CSS
.ldr-infinity {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
width: calc(var(--s) * 1.6);
height: calc(var(--s) * 0.8);
}
.ldr-infinity-track {
stroke: color-mix(in srgb, var(--ldr-color, #3b82f6) 18%, transparent);
}
.ldr-infinity-run {
stroke: var(--c);
stroke-linecap: round;
stroke-dasharray: 28 72;
animation: ldr-infinity-run 1.6s linear infinite;
}
@keyframes ldr-infinity-run {
to { stroke-dashoffset: -100; }
}
@media (prefers-reduced-motion: reduce) {
.ldr-infinity, .ldr-infinity *, .ldr-infinity::before, .ldr-infinity::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.