Assembling Cube Loader
The three visible faces of an isometric cube fly in from three sides, lock together with a small pop, then drift apart and fade. Three clip-path rhombuses share one box, so no 3D context is needed.
Also known as: isometric cube loader, cube build animation, building block loader.
HTML
<div class="ldr-cube-assemble" role="status" aria-label="Loading"> <span style="--x: 0; --y: -1; --i: 0"></span> <span style="--x: 0.87; --y: 0.5; --i: 1"></span> <span style="--x: -0.87; --y: 0.5; --i: 2"></span> </div>
CSS
.ldr-cube-assemble {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
position: relative;
width: calc(var(--s) * 0.8);
height: calc(var(--s) * 0.924);
animation: ldr-cube-assemble-pop 2.8s infinite;
}
.ldr-cube-assemble span {
position: absolute;
inset: 0;
background: color-mix(in srgb, var(--c) 55%, #fff);
clip-path: polygon(50% 0, 100% 25%, 50% 50%, 0 25%);
animation: ldr-cube-assemble-fly 2.8s infinite both;
animation-delay: calc(var(--i) * 0.12s);
}
.ldr-cube-assemble span:nth-child(2) {
background: var(--c);
clip-path: polygon(100% 25%, 100% 75%, 50% 100%, 50% 50%);
}
.ldr-cube-assemble span:nth-child(3) {
background: color-mix(in srgb, var(--c) 62%, #000);
clip-path: polygon(0 25%, 50% 50%, 50% 100%, 0 75%);
}
@keyframes ldr-cube-assemble-fly {
0% { transform: translate(calc(var(--x) * var(--s) * 0.5), calc(var(--y) * var(--s) * 0.5)); opacity: 0; animation-timing-function: cubic-bezier(0.2, 0.9, 0.3, 1); }
24%, 62% { transform: translate(0, 0); opacity: 1; animation-timing-function: cubic-bezier(0.55, 0, 0.8, 0.3); }
86%, 100% { transform: translate(calc(var(--x) * var(--s) * 0.5), calc(var(--y) * var(--s) * 0.5)); opacity: 0; }
}
@keyframes ldr-cube-assemble-pop {
0%, 32%, 46%, 100% { transform: scale(1); }
38% { transform: scale(1.08); }
}
@media (prefers-reduced-motion: reduce) {
.ldr-cube-assemble, .ldr-cube-assemble *, .ldr-cube-assemble::before, .ldr-cube-assemble::after, .ldr-cube-assemble *::before, .ldr-cube-assemble *::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.