Bounce Checkbox
Checking squashes the box flat, stretches it tall and lets it settle, like a ball landing, while the tick springs out from the middle. Squash and stretch keyframes, anchored at the bottom edge.
Also known as: bouncy checkbox css, checkbox bounce animation, squash and stretch checkbox.
HTML
<label class="chk-bounce-checkbox">
<input type="checkbox">
<span class="chk-bounce-checkbox-box">
<svg viewBox="0 0 24 24" aria-hidden="true"><path d="M5.5 12.5l4 4L18.5 7.5"/></svg>
</span>
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</label>CSS
.chk-bounce-checkbox {
--c: var(--chk-color, #3b82f6);
font-size: var(--chk-size, 24px);
position: relative;
display: inline-flex;
align-items: center;
gap: 0.6em;
font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
line-height: 1.3;
cursor: pointer;
-webkit-tap-highlight-color: transparent;
}
.chk-bounce-checkbox input {
position: absolute;
inset: 0;
width: 100%;
height: 100%;
margin: 0;
opacity: 0;
cursor: pointer;
z-index: 1;
}
.chk-bounce-checkbox-box {
box-sizing: border-box;
display: grid;
place-items: center;
flex: none;
width: 1.3em;
height: 1.3em;
border: 0.125em solid color-mix(in srgb, currentColor 38%, transparent);
border-radius: 0.32em;
transform-origin: 50% 100%;
transition: background-color 0.2s ease, border-color 0.2s ease;
}
.chk-bounce-checkbox-box svg {
display: block;
fill: none;
stroke-linecap: round;
stroke-linejoin: round;
width: 0.85em;
height: 0.85em;
stroke: #fff;
stroke-width: 3.2;
transform: scale(0);
transition: transform 0.15s ease-in;
}
.chk-bounce-checkbox input:checked + .chk-bounce-checkbox-box {
background: var(--c);
border-color: var(--c);
animation: chk-bounce-checkbox-squash 0.6s cubic-bezier(0.3, 0.1, 0.3, 1);
}
.chk-bounce-checkbox input:checked + .chk-bounce-checkbox-box svg {
transform: scale(1);
transition: transform 0.45s cubic-bezier(0.34, 1.8, 0.64, 1) 0.15s;
}
.chk-bounce-checkbox input:focus-visible + .chk-bounce-checkbox-box {
outline: 0.125em solid var(--c);
outline-offset: 0.18em;
}
@keyframes chk-bounce-checkbox-squash {
0%, 100% { transform: scale(1, 1); }
18% { transform: scale(1.28, 0.72); }
38% { transform: scale(0.82, 1.2); }
58% { transform: scale(1.1, 0.92); }
78% { transform: scale(0.97, 1.03); }
}
@media (prefers-reduced-motion: reduce) {
.chk-bounce-checkbox, .chk-bounce-checkbox *, .chk-bounce-checkbox::before, .chk-bounce-checkbox::after, .chk-bounce-checkbox *::before, .chk-bounce-checkbox *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--chk-coloron the element or a parent. Currently previewing#3b82f6. - Size: set
--chk-size. Every other dimension is inem, so the whole thing scales together. Currently previewing24px. - 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.