Stopwatch Timer Animation
A running stopwatch: minutes and seconds tick while the hundredths blur past, and the hand on the icon jumps once a second. Three registered integers, each stepped at its own speed.
Also known as: stopwatch css, timer counting up, lap timer text.
HTML
<div class="txt-stopwatch-timer" aria-label="Stopwatch running"> <svg viewBox="0 0 24 24" aria-hidden="true"><circle cx="12" cy="13.5" r="8"/><path d="M10 2.5h4M12 2.5v3"/><path class="txt-stopwatch-timer-hand" d="M12 13.5V8.5"/></svg> <span class="txt-stopwatch-timer-min" aria-hidden="true"></span><span aria-hidden="true">:</span><span class="txt-stopwatch-timer-sec" aria-hidden="true"></span><span class="txt-stopwatch-timer-hun" aria-hidden="true"></span> </div>
CSS
@property --txt-stopwatch-timer-v {
syntax: "<integer>";
initial-value: 0;
inherits: false;
}
.txt-stopwatch-timer {
--c: var(--txt-color, #3b82f6);
font-size: calc(var(--txt-size, 32px) * 1.4);
font-family: system-ui, sans-serif;
font-weight: 700;
line-height: 1.2;
display: inline-flex;
align-items: baseline;
color: var(--c);
font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
font-variant-numeric: tabular-nums;
letter-spacing: -0.03em;
/* where the watch starts: 00:12.47 */
--t: -12.47s;}
.txt-stopwatch-timer svg {
align-self: center;
width: 0.8em;
height: 0.8em;
margin-right: 0.25em;
fill: none;
stroke: currentColor;
stroke-width: 2.2;
stroke-linecap: round;
}
.txt-stopwatch-timer-hand {
transform-box: view-box;
transform-origin: 50% 56.25%;
animation: txt-stopwatch-timer-hand 60s steps(60) var(--t) infinite;
}
.txt-stopwatch-timer :is(.txt-stopwatch-timer-min, .txt-stopwatch-timer-sec, .txt-stopwatch-timer-hun) {
counter-reset: txt-stopwatch-timer-v var(--txt-stopwatch-timer-v);
}
.txt-stopwatch-timer :is(.txt-stopwatch-timer-min, .txt-stopwatch-timer-sec)::after {
content: counter(txt-stopwatch-timer-v, decimal-leading-zero);
}
.txt-stopwatch-timer-min { animation: txt-stopwatch-timer-count 3600s steps(60) var(--t) infinite; }
.txt-stopwatch-timer-sec { animation: txt-stopwatch-timer-count 60s steps(60) var(--t) infinite; }
.txt-stopwatch-timer-hun {
font-size: 0.6em;
opacity: 0.6;
animation: txt-stopwatch-timer-hundredths 1s steps(100) var(--t) infinite;
}
.txt-stopwatch-timer-hun::after {
content: "." counter(txt-stopwatch-timer-v, decimal-leading-zero);
}
@keyframes txt-stopwatch-timer-count {
to { --txt-stopwatch-timer-v: 60; }
}
@keyframes txt-stopwatch-timer-hundredths {
to { --txt-stopwatch-timer-v: 100; }
}
@keyframes txt-stopwatch-timer-hand {
to { transform: rotate(360deg); }
}
@media (prefers-reduced-motion: reduce) {
.txt-stopwatch-timer, .txt-stopwatch-timer *, .txt-stopwatch-timer::before, .txt-stopwatch-timer::after, .txt-stopwatch-timer *::before, .txt-stopwatch-timer *::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.