Origami Fold Loader
A paper diamond folds in half across one diagonal, opens, then folds across the other, showing its paler back while folded. Each quarter is two-sided through backface-visibility.
Also known as: paper fold loader, folding paper animation, fold diamond loader.
HTML
<div class="ldr-origami-fold" role="status" aria-label="Loading"> <span></span><span></span><span></span><span></span> </div>
CSS
.ldr-origami-fold {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
position: relative;
width: var(--s);
height: var(--s);
perspective: calc(var(--s) * 3);
}
.ldr-origami-fold span {
--a: 0;
--b: 0;
position: absolute;
inset: 0;
transform-style: preserve-3d;
animation: ldr-origami-fold-fold 3.2s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
.ldr-origami-fold span::before,
.ldr-origami-fold span::after {
content: "";
position: absolute;
inset: 0;
backface-visibility: hidden;
}
.ldr-origami-fold span::before {
background: var(--c);
clip-path: var(--p);
}
.ldr-origami-fold span::after {
background: color-mix(in srgb, var(--c) 55%, #fff);
clip-path: var(--q);
transform: rotateY(180deg);
}
.ldr-origami-fold span:nth-child(1) {
--p: polygon(100% 50%, 50% 100%, 50% 50%);
--q: polygon(0 50%, 50% 100%, 50% 50%);
}
.ldr-origami-fold span:nth-child(2) {
--a: 1;
--p: polygon(50% 100%, 0 50%, 50% 50%);
--q: polygon(50% 100%, 100% 50%, 50% 50%);
}
.ldr-origami-fold span:nth-child(3) {
--b: 1;
--p: polygon(50% 0, 100% 50%, 50% 50%);
--q: polygon(50% 0, 0 50%, 50% 50%);
}
.ldr-origami-fold span:nth-child(4) {
--a: 1;
--b: 1;
--p: polygon(50% 0, 50% 50%, 0 50%);
--q: polygon(50% 0, 50% 50%, 100% 50%);
}
.ldr-origami-fold span:nth-child(1)::before {
background: color-mix(in srgb, var(--c) 66%, #000);
}
.ldr-origami-fold span:nth-child(2)::before,
.ldr-origami-fold span:nth-child(3)::before {
background: color-mix(in srgb, var(--c) 82%, #000);
}
@keyframes ldr-origami-fold-fold {
0%, 8% { transform: rotateY(0deg) rotateX(0deg); }
28%, 40% { transform: rotateY(calc(var(--a) * 180deg)) rotateX(0deg); }
56% { transform: rotateY(0deg) rotateX(0deg); }
76%, 88% { transform: rotateY(0deg) rotateX(calc(var(--b) * -180deg)); }
100% { transform: rotateY(0deg) rotateX(0deg); }
}
@media (prefers-reduced-motion: reduce) {
.ldr-origami-fold, .ldr-origami-fold *, .ldr-origami-fold::before, .ldr-origami-fold::after, .ldr-origami-fold *::before, .ldr-origami-fold *::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.