Triangle Path Loader
A triangle outline draws itself around from one corner, then erases from the start while the shape turns a third of a turn. SVG stroke-dashoffset with pathLength keeps the dash math simple.
Also known as: triangle loader, svg triangle loader, drawing triangle spinner.
HTML
<div class="ldr-triangle-path" role="status" aria-label="Loading">
<svg viewBox="0 0 100 100" aria-hidden="true">
<polygon class="ldr-triangle-path-track" points="50,13.6 92,86.4 8,86.4" pathLength="100"></polygon>
<polygon class="ldr-triangle-path-line" points="50,13.6 92,86.4 8,86.4" pathLength="100"></polygon>
</svg>
</div>CSS
.ldr-triangle-path {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
width: var(--s);
height: var(--s);
}
.ldr-triangle-path svg {
display: block;
width: 100%;
height: 100%;
overflow: visible;
transform-origin: 50% 62.1%;
animation: ldr-triangle-path-turn 1.8s linear infinite;
}
.ldr-triangle-path polygon {
fill: none;
stroke-width: 9;
stroke-linejoin: round;
stroke-linecap: round;
}
.ldr-triangle-path-track {
stroke: color-mix(in srgb, var(--ldr-color, #3b82f6) 16%, transparent);
}
.ldr-triangle-path-line {
stroke: var(--c);
stroke-dasharray: 100 100;
animation: ldr-triangle-path-draw 1.8s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
@keyframes ldr-triangle-path-turn {
to { transform: rotate(120deg); }
}
@keyframes ldr-triangle-path-draw {
0% { stroke-dashoffset: 100; }
45%, 55% { stroke-dashoffset: 0; }
100% { stroke-dashoffset: -100; }
}
@media (prefers-reduced-motion: reduce) {
.ldr-triangle-path, .ldr-triangle-path *, .ldr-triangle-path::before, .ldr-triangle-path::after, .ldr-triangle-path *::before, .ldr-triangle-path *::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.