Rubber Band
Slowly pulled wide and flat, then let go: it snaps tall, overshoots and rings down to its shape. Fun on a button that was just tapped. Scale X and Y move in opposite directions.
Also known as: rubber band animation css, rubberband, elastic stretch.
Stretch
HTML
<div class="kfa-rubber-band">Stretch</div>
CSS
.kfa-rubber-band {
--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-rubber-band-snap 1s both;
}
@keyframes kfa-rubber-band-snap {
0% { transform: scale(1, 1); animation-timing-function: cubic-bezier(0.4, 0, 0.6, 1); }
/* slow pull, then release */
30% { transform: scale(1.28, 0.76); animation-timing-function: cubic-bezier(0.3, 0, 0.3, 1); }
42% { transform: scale(0.8, 1.2); animation-timing-function: ease-in-out; }
54% { transform: scale(1.14, 0.88); animation-timing-function: ease-in-out; }
66% { transform: scale(0.95, 1.05); animation-timing-function: ease-in-out; }
78% { transform: scale(1.03, 0.98); animation-timing-function: ease-in-out; }
90%, 100% { transform: scale(1, 1); }
}
@media (prefers-reduced-motion: reduce) {
.kfa-rubber-band, .kfa-rubber-band *, .kfa-rubber-band::before, .kfa-rubber-band::after, .kfa-rubber-band *::before, .kfa-rubber-band *::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.