Confetti Checkbox
Checking fires a ring of confetti out of the box: eight bits in four colors fly outward, spin and fade while the tick draws. Each bit is a span with an --i index that sets its angle and delay.
Also known as: checkbox particle burst, checkbox burst animation css, celebration checkbox.
HTML
<label class="chk-confetti-checkbox">
<input type="checkbox">
<span class="chk-confetti-checkbox-box">
<span class="chk-confetti-checkbox-bit" style="--i: 0"></span>
<span class="chk-confetti-checkbox-bit" style="--i: 1"></span>
<span class="chk-confetti-checkbox-bit" style="--i: 2"></span>
<span class="chk-confetti-checkbox-bit" style="--i: 3"></span>
<span class="chk-confetti-checkbox-bit" style="--i: 4"></span>
<span class="chk-confetti-checkbox-bit" style="--i: 5"></span>
<span class="chk-confetti-checkbox-bit" style="--i: 6"></span>
<span class="chk-confetti-checkbox-bit" style="--i: 7"></span>
<svg viewBox="0 0 24 24" aria-hidden="true"><path d="M5.5 12.5l4 4L18.5 7.5"/></svg>
</span>
Claim my reward
</label>CSS
.chk-confetti-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-confetti-checkbox input {
position: absolute;
inset: 0;
width: 100%;
height: 100%;
margin: 0;
opacity: 0;
cursor: pointer;
z-index: 1;
}
.chk-confetti-checkbox-box {
position: relative;
box-sizing: border-box;
display: grid;
place-items: center;
flex: none;
width: 1.375em;
height: 1.375em;
border: 0.125em solid color-mix(in srgb, currentColor 38%, transparent);
border-radius: 0.3em;
transition: background-color 0.2s ease, border-color 0.2s ease;
}
.chk-confetti-checkbox-bit {
--d: -1.25em;
position: absolute;
left: 50%;
top: 50%;
width: 0.24em;
height: 0.24em;
margin: -0.12em 0 0 -0.12em;
border-radius: 0.04em;
background: var(--c);
opacity: 0;
pointer-events: none;
}
.chk-confetti-checkbox-bit:nth-child(even) {
--d: -1.6em;
}
.chk-confetti-checkbox-bit:nth-child(4n + 2) {
background: #f59e0b;
border-radius: 50%;
}
.chk-confetti-checkbox-bit:nth-child(4n + 3) {
background: #ec4899;
}
.chk-confetti-checkbox-bit:nth-child(4n + 4) {
background: #10b981;
border-radius: 50%;
}
.chk-confetti-checkbox-box svg {
display: block;
fill: none;
stroke-linecap: round;
stroke-linejoin: round;
position: relative;
width: 0.9em;
height: 0.9em;
stroke: #fff;
stroke-width: 3.2;
stroke-dasharray: 20;
stroke-dashoffset: 20;
transition: stroke-dashoffset 0.12s ease-in;
}
.chk-confetti-checkbox input:checked + .chk-confetti-checkbox-box {
background: var(--c);
border-color: var(--c);
animation: chk-confetti-checkbox-pop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.chk-confetti-checkbox input:checked + .chk-confetti-checkbox-box .chk-confetti-checkbox-bit {
animation: chk-confetti-checkbox-burst 0.75s cubic-bezier(0.15, 0.7, 0.3, 1) calc(var(--i) * 15ms);
}
.chk-confetti-checkbox input:checked + .chk-confetti-checkbox-box svg {
stroke-dashoffset: 0;
transition: stroke-dashoffset 0.3s ease-out 0.15s;
}
.chk-confetti-checkbox input:focus-visible + .chk-confetti-checkbox-box {
outline: 0.125em solid var(--c);
outline-offset: 0.18em;
}
@keyframes chk-confetti-checkbox-pop {
0% { transform: scale(0.8); }
100% { transform: scale(1); }
}
@keyframes chk-confetti-checkbox-burst {
0% { opacity: 1; transform: rotate(calc(var(--i) * 45deg)) translateY(-0.4em) scale(0.4) rotate(0deg); }
70% { opacity: 1; }
100% { opacity: 0; transform: rotate(calc(var(--i) * 45deg + 20deg)) translateY(var(--d)) scale(1) rotate(180deg); }
}
@media (prefers-reduced-motion: reduce) {
.chk-confetti-checkbox, .chk-confetti-checkbox *, .chk-confetti-checkbox::before, .chk-confetti-checkbox::after, .chk-confetti-checkbox *::before, .chk-confetti-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.