Jello
The box jiggles like gelatin: it leans into a parallelogram one way, then the other, squishing slightly as it goes, and firms up. Built from skew() plus a little scale, no rotation.
Also known as: jello animation css, jelly wobble, jiggle effect.
Jello
HTML
<div class="kfa-jello">Jello</div>
CSS
.kfa-jello {
--c: var(--kfa-color, #3b82f6);
font-size: var(--kfa-size, 16px);
display: grid;
place-items: center;
width: 5.5em;
height: 5.5em;
border-radius: 1em;
background: var(--c);
color: #fff;
font-family: system-ui, sans-serif;
font-weight: 700;
box-shadow: 0 0.6em 1.4em -0.6em color-mix(in srgb, var(--c) 70%, transparent);
animation: kfa-jello-jiggle 1s ease-in-out both;
}
@keyframes kfa-jello-jiggle {
0%, 100% { transform: skew(0, 0) scale(1, 1); }
12% { transform: skew(-14deg, -4deg) scale(1.05, 0.95); }
26% { transform: skew(10deg, 3deg) scale(0.97, 1.03); }
40% { transform: skew(-6deg, -2deg) scale(1.02, 0.98); }
54% { transform: skew(3.5deg, 1deg) scale(1, 1); }
68% { transform: skew(-1.6deg, -0.5deg) scale(1, 1); }
82% { transform: skew(0.6deg, 0.2deg) scale(1, 1); }
}
@media (prefers-reduced-motion: reduce) {
.kfa-jello, .kfa-jello *, .kfa-jello::before, .kfa-jello::after, .kfa-jello *::before, .kfa-jello *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--kfa-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--kfa-size. Every other dimension is inem, so the whole thing scales together. Currently previewing16px. - Speed: change the duration on the
transitionoranimationshorthand. Staggered delays are relative, so they keep their rhythm. - Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.