Circle Notch Spinner
A thick three quarter ring with rounded ends, spinning fast: the shape of the circle-notch icon and Bootstrap's border spinner. One SVG circle with a fixed dash, so it scales cleanly.
Also known as: bootstrap spinner border, three quarter ring spinner, open circle spinner.
HTML
<svg class="ldr-circle-notch" viewBox="0 0 48 48" role="status" aria-label="Loading"> <circle cx="24" cy="24" r="19" pathLength="100"></circle> </svg>
CSS
.ldr-circle-notch {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
width: var(--s);
height: var(--s);
animation: ldr-circle-notch-spin 0.75s linear infinite;
}
.ldr-circle-notch circle {
fill: none;
stroke: var(--c);
stroke-width: 6;
stroke-linecap: round;
stroke-dasharray: 70 30;
}
@keyframes ldr-circle-notch-spin {
to { transform: rotate(360deg); }
}
@media (prefers-reduced-motion: reduce) {
.ldr-circle-notch, .ldr-circle-notch *, .ldr-circle-notch::before, .ldr-circle-notch::after, .ldr-circle-notch *::before, .ldr-circle-notch *::after {
animation-duration: 3s;
}
}Tailwind CSS version
The same loader using only Tailwind's built-in animation utilities. No custom keyframes or config needed.
<svg class="h-12 w-12 animate-spin text-blue-500 [animation-duration:0.75s]" viewBox="0 0 48 48" role="status" aria-label="Loading"> <circle cx="24" cy="24" r="19" pathLength="100" fill="none" stroke="currentColor" stroke-width="6" stroke-linecap="round" stroke-dasharray="70 30"></circle> </svg>
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.