Screensaver Bounce Loader
A little badge drifts around a screen frame and bounces off every edge, changing hue each time it hits a side wall. Two linear alternate animations with different periods.
Also known as: dvd screensaver animation, bouncing logo loader, corner bounce loader.
HTML
<div class="ldr-screensaver-bounce" role="status" aria-label="Loading"> <span class="ldr-screensaver-bounce-x"><span class="ldr-screensaver-bounce-badge"></span></span> </div>
CSS
.ldr-screensaver-bounce {
--s: var(--ldr-size, 48px);
--c: var(--ldr-color, #3b82f6);
position: relative;
width: calc(var(--s) * 1.9);
height: calc(var(--s) * 1.1);
box-sizing: border-box;
border: calc(var(--s) / 20) solid color-mix(in srgb, var(--ldr-color, #3b82f6) 30%, transparent);
border-radius: calc(var(--s) / 8);
}
.ldr-screensaver-bounce-x {
position: absolute;
top: calc(var(--s) * 0.04);
left: calc(var(--s) * 0.04);
animation: ldr-screensaver-bounce-x 1.6s linear infinite alternate;
}
.ldr-screensaver-bounce-badge {
position: absolute;
width: calc(var(--s) * 0.44);
height: calc(var(--s) * 0.26);
border-radius: 50%;
background: var(--c);
animation:
ldr-screensaver-bounce-y 0.9s linear infinite alternate,
ldr-screensaver-bounce-hue 6.4s steps(4) infinite;
}
.ldr-screensaver-bounce-badge::after {
content: "";
position: absolute;
inset: 34% 24%;
border-radius: 50%;
background: color-mix(in srgb, var(--c) 40%, #fff);
}
@keyframes ldr-screensaver-bounce-x {
from { transform: translateX(0); }
to { transform: translateX(calc(var(--s) * 1.28)); }
}
@keyframes ldr-screensaver-bounce-y {
from { transform: translateY(0); }
to { transform: translateY(calc(var(--s) * 0.66)); }
}
/* One hue step per side-wall hit, since the x trip takes exactly 1.6s. */
@keyframes ldr-screensaver-bounce-hue {
from { filter: hue-rotate(0deg); }
to { filter: hue-rotate(360deg); }
}
@media (prefers-reduced-motion: reduce) {
.ldr-screensaver-bounce, .ldr-screensaver-bounce *, .ldr-screensaver-bounce::before, .ldr-screensaver-bounce::after, .ldr-screensaver-bounce *::before, .ldr-screensaver-bounce *::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.