Star Rating Counter
A review score counts from 0.0 to 4.9 while five stars fill to match. One integer is animated; the whole and tenths digits are derived from it by two more registered integers.
Also known as: rating number animation, review score counter, animated star rating.
HTML
<div class="txt-rating-counter" aria-label="Rated 4.9 out of 5 from 2,318 reviews">
<span class="txt-rating-counter-num" aria-hidden="true"></span>
<span class="txt-rating-counter-meta">
<span class="txt-rating-counter-stars" aria-hidden="true">★★★★★</span>
<span>2,318 reviews</span>
</span>
</div>CSS
@property --txt-rating-counter-n {
syntax: "<integer>";
initial-value: 0;
inherits: false;
}
@property --txt-rating-counter-whole {
syntax: "<integer>";
initial-value: 0;
inherits: false;
}
@property --txt-rating-counter-tenth {
syntax: "<integer>";
initial-value: 0;
inherits: false;
}
.txt-rating-counter {
--c: var(--txt-color, #3b82f6);
font-size: var(--txt-size, 32px);
font-family: system-ui, sans-serif;
font-weight: 700;
line-height: 1.2;
display: inline-flex;
align-items: center;
gap: 0.45em;
--ease: cubic-bezier(0.22, 1, 0.36, 1);}
.txt-rating-counter-num {
font-size: 1.9em;
line-height: 1;
color: var(--c);
font-variant-numeric: tabular-nums;
/* 49 tenths: an integer rounds to nearest, so n / 10 - 0.5 is the floor */
--txt-rating-counter-whole: calc(var(--txt-rating-counter-n) / 10 - 0.5);
--txt-rating-counter-tenth: calc(var(--txt-rating-counter-n) - var(--txt-rating-counter-whole) * 10);
counter-reset: txt-rating-counter-w var(--txt-rating-counter-whole) txt-rating-counter-t var(--txt-rating-counter-tenth);
animation: txt-rating-counter-count 2s var(--ease) forwards;
}
.txt-rating-counter-num::after {
content: counter(txt-rating-counter-w) "." counter(txt-rating-counter-t);
}
.txt-rating-counter-meta {
display: flex;
flex-direction: column;
gap: 0.15em;
font-size: 0.5em;
font-weight: 600;
opacity: 0.9;
}
.txt-rating-counter-stars {
position: relative;
width: max-content;
font-size: 1.6em;
line-height: 1;
letter-spacing: 0.05em;
color: color-mix(in srgb, var(--c) 22%, transparent);
}
.txt-rating-counter-stars::after {
content: "★★★★★";
position: absolute;
inset: 0;
color: var(--c);
clip-path: inset(0 100% 0 0);
animation: txt-rating-counter-fill 2s var(--ease) forwards;
}
@keyframes txt-rating-counter-count {
to { --txt-rating-counter-n: 49; }
}
@keyframes txt-rating-counter-fill {
to { clip-path: inset(0 3% 0 0); }
}
@media (prefers-reduced-motion: reduce) {
.txt-rating-counter, .txt-rating-counter *, .txt-rating-counter::before, .txt-rating-counter::after, .txt-rating-counter *::before, .txt-rating-counter *::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.