Countdown Number Animation
Counts down from 10 to 0 with a punch on every tick, then GO! bursts in and stays. The tick length is one variable; the number is a registered integer stepped with steps().
Also known as: countdown animation css, 10 to 0 countdown, launch countdown text.
HTML
<div class="txt-countdown-to-go" aria-label="Countdown to go"></div>
CSS
@property --txt-countdown-to-go-n {
syntax: "<integer>";
initial-value: 10;
inherits: false;
}
.txt-countdown-to-go {
--c: var(--txt-color, #3b82f6);
font-size: calc(var(--txt-size, 32px) * 2.2);
font-family: system-ui, sans-serif;
font-weight: 700;
line-height: 1.2;
display: inline-grid;
place-items: center;
line-height: 1;
color: var(--c);
font-variant-numeric: tabular-nums;
--tick: 0.4s;
counter-reset: txt-countdown-to-go-v var(--txt-countdown-to-go-n);
animation: txt-countdown-to-go-count calc(var(--tick) * 11) steps(11) forwards;}
.txt-countdown-to-go::before,
.txt-countdown-to-go::after {
grid-area: 1 / 1;
}
.txt-countdown-to-go::before {
content: counter(txt-countdown-to-go-v);
animation:
txt-countdown-to-go-tick var(--tick) cubic-bezier(0.2, 0.9, 0.3, 1) 11,
txt-countdown-to-go-hide 0.15s calc(var(--tick) * 11) forwards;
}
.txt-countdown-to-go::after {
content: "GO!";
opacity: 0;
animation: txt-countdown-to-go-go 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) calc(var(--tick) * 11) forwards;
}
@keyframes txt-countdown-to-go-count {
from { --txt-countdown-to-go-n: 10; }
to { --txt-countdown-to-go-n: -1; }
}
@keyframes txt-countdown-to-go-tick {
from { transform: scale(1.35); opacity: 0.35; }
40% { opacity: 1; }
to { transform: scale(1); opacity: 1; }
}
@keyframes txt-countdown-to-go-hide {
to { opacity: 0; transform: scale(0.6); }
}
@keyframes txt-countdown-to-go-go {
from { opacity: 0; transform: scale(0.3) rotate(-8deg); }
to { opacity: 1; transform: scale(1) rotate(0); }
}
@media (prefers-reduced-motion: reduce) {
.txt-countdown-to-go, .txt-countdown-to-go *, .txt-countdown-to-go::before, .txt-countdown-to-go::after, .txt-countdown-to-go *::before, .txt-countdown-to-go *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--txt-coloron the element or a parent. Currently previewing#3b82f6. - Font size: set
--txt-size. Every other dimension is inem, so the whole thing scales together. Currently previewing40px. - 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.