Draw and Erase Circle Loader
A stroke draws a full circle from 12 o'clock, pauses, then its tail chases round and erases it. Only stroke-dashoffset moves, on one SVG circle with pathLength set to 100.
Also known as: stroke draw circle, svg circle drawing animation, circle stroke loader.
HTML
<svg class="ldr-circle-draw" viewBox="0 0 48 48" role="status" aria-label="Loading"> <circle cx="24" cy="24" r="19" pathLength="100"></circle> </svg>
CSS
.ldr-circle-draw {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
width: var(--s);
height: var(--s);
transform: rotate(-90deg);
}
/* Dash 100, gap 120: offset 105 hides it, 0 shows all of it, -105 has run past the end. */
.ldr-circle-draw circle {
fill: none;
stroke: var(--c);
stroke-width: 4.5;
stroke-linecap: round;
stroke-dasharray: 100 120;
animation: ldr-circle-draw-trace 1.8s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
@keyframes ldr-circle-draw-trace {
0% { stroke-dashoffset: 105; }
45%, 55% { stroke-dashoffset: 0; }
100% { stroke-dashoffset: -105; }
}
@media (prefers-reduced-motion: reduce) {
.ldr-circle-draw, .ldr-circle-draw *, .ldr-circle-draw::before, .ldr-circle-draw::after, .ldr-circle-draw *::before, .ldr-circle-draw *::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.