Skip to content

Instantly share code, notes, and snippets.

@melanyss

melanyss/animated-star-rating.markdown

Last active June 7, 2024 09:52
Show Gist options
  • Save melanyss/ddb0a7255a43306862fd089d31be00c7 to your computer and use it in GitHub Desktop.
Save melanyss/ddb0a7255a43306862fd089d31be00c7 to your computer and use it in GitHub Desktop.
Download ZIP
Animated Star Rating
Raw
animated-star-rating.markdown

Animated Star Rating

A star rating where stars pop out one by one if you choose a higher rating.

A Pen on CodePen.

License.

Raw
index.html
<form class="rating">
<div class="rating__stars">
<input id="rating-1" class="rating__input rating__input-1" type="radio" name="rating" value="1">
<input id="rating-2" class="rating__input rating__input-2" type="radio" name="rating" value="2">
<input id="rating-3" class="rating__input rating__input-3" type="radio" name="rating" value="3">
<input id="rating-4" class="rating__input rating__input-4" type="radio" name="rating" value="4">
<input id="rating-5" class="rating__input rating__input-5" type="radio" name="rating" value="5">
<label class="rating__label" for="rating-1">
<svg class="rating__star" width="32" height="32" viewBox="0 0 32 32" aria-hidden="true">
<g transform="translate(16,16)">
<circle class="rating__star-ring" fill="none" stroke="#000" stroke-width="16" r="8" transform="scale(0)" />
</g>
<g stroke="#000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<g transform="translate(16,16) rotate(180)">
<polygon class="rating__star-stroke" points="0,15 4.41,6.07 14.27,4.64 7.13,-2.32 8.82,-12.14 0,-7.5 -8.82,-12.14 -7.13,-2.32 -14.27,4.64 -4.41,6.07" fill="none" />
<polygon class="rating__star-fill" points="0,15 4.41,6.07 14.27,4.64 7.13,-2.32 8.82,-12.14 0,-7.5 -8.82,-12.14 -7.13,-2.32 -14.27,4.64 -4.41,6.07" fill="#000" />
</g>
<g transform="translate(16,16)" stroke-dasharray="12 12" stroke-dashoffset="12">
<polyline class="rating__star-line" transform="rotate(0)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(72)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(144)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(216)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(288)" points="0 4,0 16" />
</g>
</g>
</svg>
<span class="rating__sr">1 star—Terrible</span>
</label>
<label class="rating__label" for="rating-2">
<svg class="rating__star" width="32" height="32" viewBox="0 0 32 32" aria-hidden="true">
<g transform="translate(16,16)">
<circle class="rating__star-ring" fill="none" stroke="#000" stroke-width="16" r="8" transform="scale(0)" />
</g>
<g stroke="#000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<g transform="translate(16,16) rotate(180)">
<polygon class="rating__star-stroke" points="0,15 4.41,6.07 14.27,4.64 7.13,-2.32 8.82,-12.14 0,-7.5 -8.82,-12.14 -7.13,-2.32 -14.27,4.64 -4.41,6.07" fill="none" />
<polygon class="rating__star-fill" points="0,15 4.41,6.07 14.27,4.64 7.13,-2.32 8.82,-12.14 0,-7.5 -8.82,-12.14 -7.13,-2.32 -14.27,4.64 -4.41,6.07" fill="#000" />
</g>
<g transform="translate(16,16)" stroke-dasharray="12 12" stroke-dashoffset="12">
<polyline class="rating__star-line" transform="rotate(0)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(72)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(144)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(216)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(288)" points="0 4,0 16" />
</g>
</g>
</svg>
<span class="rating__sr">2 stars—Bad</span>
</label>
<label class="rating__label" for="rating-3">
<svg class="rating__star" width="32" height="32" viewBox="0 0 32 32" aria-hidden="true">
<g transform="translate(16,16)">
<circle class="rating__star-ring" fill="none" stroke="#000" stroke-width="16" r="8" transform="scale(0)" />
</g>
<g stroke="#000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<g transform="translate(16,16) rotate(180)">
<polygon class="rating__star-stroke" points="0,15 4.41,6.07 14.27,4.64 7.13,-2.32 8.82,-12.14 0,-7.5 -8.82,-12.14 -7.13,-2.32 -14.27,4.64 -4.41,6.07" fill="none" />
<polygon class="rating__star-fill" points="0,15 4.41,6.07 14.27,4.64 7.13,-2.32 8.82,-12.14 0,-7.5 -8.82,-12.14 -7.13,-2.32 -14.27,4.64 -4.41,6.07" fill="#000" />
</g>
<g transform="translate(16,16)" stroke-dasharray="12 12" stroke-dashoffset="12">
<polyline class="rating__star-line" transform="rotate(0)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(72)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(144)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(216)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(288)" points="0 4,0 16" />
</g>
</g>
</svg>
<span class="rating__sr">3 stars—OK</span>
</label>
<label class="rating__label" for="rating-4">
<svg class="rating__star" width="32" height="32" viewBox="0 0 32 32" aria-hidden="true">
<g transform="translate(16,16)">
<circle class="rating__star-ring" fill="none" stroke="#000" stroke-width="16" r="8" transform="scale(0)" />
</g>
<g stroke="#000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<g transform="translate(16,16) rotate(180)">
<polygon class="rating__star-stroke" points="0,15 4.41,6.07 14.27,4.64 7.13,-2.32 8.82,-12.14 0,-7.5 -8.82,-12.14 -7.13,-2.32 -14.27,4.64 -4.41,6.07" fill="none" />
<polygon class="rating__star-fill" points="0,15 4.41,6.07 14.27,4.64 7.13,-2.32 8.82,-12.14 0,-7.5 -8.82,-12.14 -7.13,-2.32 -14.27,4.64 -4.41,6.07" fill="#000" />
</g>
<g transform="translate(16,16)" stroke-dasharray="12 12" stroke-dashoffset="12">
<polyline class="rating__star-line" transform="rotate(0)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(72)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(144)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(216)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(288)" points="0 4,0 16" />
</g>
</g>
</svg>
<span class="rating__sr">4 stars—Good</span>
</label>
<label class="rating__label" for="rating-5">
<svg class="rating__star" width="32" height="32" viewBox="0 0 32 32" aria-hidden="true">
<g transform="translate(16,16)">
<circle class="rating__star-ring" fill="none" stroke="#000" stroke-width="16" r="8" transform="scale(0)" />
</g>
<g stroke="#000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<g transform="translate(16,16) rotate(180)">
<polygon class="rating__star-stroke" points="0,15 4.41,6.07 14.27,4.64 7.13,-2.32 8.82,-12.14 0,-7.5 -8.82,-12.14 -7.13,-2.32 -14.27,4.64 -4.41,6.07" fill="none" />
<polygon class="rating__star-fill" points="0,15 4.41,6.07 14.27,4.64 7.13,-2.32 8.82,-12.14 0,-7.5 -8.82,-12.14 -7.13,-2.32 -14.27,4.64 -4.41,6.07" fill="#000" />
</g>
<g transform="translate(16,16)" stroke-dasharray="12 12" stroke-dashoffset="12">
<polyline class="rating__star-line" transform="rotate(0)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(72)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(144)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(216)" points="0 4,0 16" />
<polyline class="rating__star-line" transform="rotate(288)" points="0 4,0 16" />
</g>
</g>
</svg>
<span class="rating__sr">5 stars—Excellent</span>
</label>
<p class="rating__display" data-rating="1" hidden>Terrible</p>
<p class="rating__display" data-rating="2" hidden>Bad</p>
<p class="rating__display" data-rating="3" hidden>OK</p>
<p class="rating__display" data-rating="4" hidden>Good</p>
<p class="rating__display" data-rating="5" hidden>Excellent</p>
</div>
</form>
Raw
script.js
window.addEventListener("DOMContentLoaded",() => {
const starRating = new StarRating("form");
});
class StarRating {
constructor(qs) {
this.ratings = [
{id: 1, name: "Terrible"},
{id: 2, name: "Bad"},
{id: 3, name: "OK"},
{id: 4, name: "Good"},
{id: 5, name: "Excellent"}
];
this.rating = null;
this.el = document.querySelector(qs);
this.init();
}
init() {
this.el?.addEventListener("change",this.updateRating.bind(this));
// stop Firefox from preserving form data between refreshes
try {
this.el?.reset();
} catch (err) {
console.error("Element isn’t a form.");
}
}
updateRating(e) {
// clear animation delays
Array.from(this.el.querySelectorAll(`[for*="rating"]`)).forEach(el => {
el.className = "rating__label";
});
const ratingObject = this.ratings.find(r => r.id === +e.target.value);
const prevRatingID = this.rating?.id || 0;
let delay = 0;
this.rating = ratingObject;
this.ratings.forEach(rating => {
const { id } = rating;
// add the delays
const ratingLabel = this.el.querySelector(`[for="rating-${id}"]`);
if (id > prevRatingID + 1 && id <= this.rating.id) {
++delay;
ratingLabel.classList.add(`rating__label--delay${delay}`);
}
// hide ratings to not read, show the one to read
const ratingTextEl = this.el.querySelector(`[data-rating="${id}"]`);
if (this.rating.id !== id)
ratingTextEl.setAttribute("hidden",true);
else
ratingTextEl.removeAttribute("hidden");
});
}
}
Raw
style.scss
* {
border: 0;
box-sizing: border-box;
margin: 0;
padding: 0;
}
$hue: 223;
$starHue: 38;
:root {
--bg: #{hsl($hue,10%,90%)};
--fg: #{hsl($hue,10%,10%)};
--primary: #{hsl($hue,90%,55%)};
--yellow: #{hsl($starHue,90%,55%)};
--yellow-t: #{hsla($starHue,90%,55%,0)};
--bezier: cubic-bezier(0.42,0,0.58,1);
--trans-dur: 0.3s;
font-size: calc(24px + (30 - 24) * (100vw - 320px) / (1280 - 320));
}
body {
background-color: var(--bg);
color: var(--fg);
font: 1em/1.5 "DM Sans", sans-serif;
display: flex;
height: 100vh;
transition:
background-color var(--trans-dur),
color var(--trans-dur);
}
.rating {
margin: auto;
&__display {
font-size: 1em;
font-weight: 500;
min-height: 1.25em;
position: absolute;
top: 100%;
width: 100%;
text-align: center;
}
&__stars {
display: flex;
padding-bottom: 0.375em;
position: relative;
}
&__star {
display: block;
overflow: visible;
pointer-events: none;
width: 2em;
height: 2em;
&-ring,
&-fill,
&-line,
&-stroke {
animation-duration: 1s;
animation-timing-function: ease-in-out;
animation-fill-mode: forwards;
}
&-ring,
&-fill,
&-line {
stroke: var(--yellow);
}
&-fill {
fill: var(--yellow);
transform: scale(0);
transition:
fill var(--trans-dur) var(--bezier),
transform var(--trans-dur) var(--bezier);
}
&-line {
stroke-dasharray: 12 13;
stroke-dashoffset: -13;
}
&-stroke {
stroke: hsl($hue,10%,80%);
transition: stroke var(--trans-dur);
}
}
&__label {
cursor: pointer;
padding: 0.125em;
}
@for $s from 1 through 4 {
&__label--delay#{$s} &__star-ring,
&__label--delay#{$s} &__star-fill,
&__label--delay#{$s} &__star-line,
&__label--delay#{$s} &__star-stroke {
animation-delay: 0.05s * $s;
}
}
&__input {
position: absolute;
-webkit-appearance: none;
appearance: none;
}
// display
&__input:hover ~ [data-rating]:not([hidden]) {
display: none;
}
&__input-1:hover ~ [data-rating="1"][hidden],
&__input-2:hover ~ [data-rating="2"][hidden],
&__input-3:hover ~ [data-rating="3"][hidden],
&__input-4:hover ~ [data-rating="4"][hidden],
&__input-5:hover ~ [data-rating="5"][hidden],
&__input:checked:hover ~ [data-rating]:not([hidden]) {
display: block;
}
// stars
&__input-1:hover ~ &__label:first-of-type &__star-stroke,
&__input-2:hover ~ &__label:nth-of-type(-n + 2) &__star-stroke,
&__input-3:hover ~ &__label:nth-of-type(-n + 3) &__star-stroke,
&__input-4:hover ~ &__label:nth-of-type(-n + 4) &__star-stroke,
&__input-5:hover ~ &__label:nth-of-type(-n + 5) &__star-stroke {
stroke: var(--yellow);
transform: scale(1);
}
&__input-1:checked ~ &__label:first-of-type &__star-ring,
&__input-2:checked ~ &__label:nth-of-type(-n + 2) &__star-ring,
&__input-3:checked ~ &__label:nth-of-type(-n + 3) &__star-ring,
&__input-4:checked ~ &__label:nth-of-type(-n + 4) &__star-ring,
&__input-5:checked ~ &__label:nth-of-type(-n + 5) &__star-ring {
animation-name: starRing;
}
&__input-1:checked ~ &__label:first-of-type &__star-stroke,
&__input-2:checked ~ &__label:nth-of-type(-n + 2) &__star-stroke,
&__input-3:checked ~ &__label:nth-of-type(-n + 3) &__star-stroke,
&__input-4:checked ~ &__label:nth-of-type(-n + 4) &__star-stroke,
&__input-5:checked ~ &__label:nth-of-type(-n + 5) &__star-stroke {
animation-name: starStroke;
}
&__input-1:checked ~ &__label:first-of-type &__star-line,
&__input-2:checked ~ &__label:nth-of-type(-n + 2) &__star-line,
&__input-3:checked ~ &__label:nth-of-type(-n + 3) &__star-line,
&__input-4:checked ~ &__label:nth-of-type(-n + 4) &__star-line,
&__input-5:checked ~ &__label:nth-of-type(-n + 5) &__star-line {
animation-name: starLine;
}
&__input-1:checked ~ &__label:first-of-type &__star-fill,
&__input-2:checked ~ &__label:nth-of-type(-n + 2) &__star-fill,
&__input-3:checked ~ &__label:nth-of-type(-n + 3) &__star-fill,
&__input-4:checked ~ &__label:nth-of-type(-n + 4) &__star-fill,
&__input-5:checked ~ &__label:nth-of-type(-n + 5) &__star-fill {
animation-name: starFill;
}
&__input-1:not(:checked):hover ~ &__label:first-of-type &__star-fill,
&__input-2:not(:checked):hover ~ &__label:nth-of-type(2) &__star-fill,
&__input-3:not(:checked):hover ~ &__label:nth-of-type(3) &__star-fill,
&__input-4:not(:checked):hover ~ &__label:nth-of-type(4) &__star-fill,
&__input-5:not(:checked):hover ~ &__label:nth-of-type(5) &__star-fill {
fill: var(--yellow-t);
}
// screen reader text
&__sr {
clip: rect(1px,1px,1px,1px);
overflow: hidden;
position: absolute;
width: 1px;
height: 1px;
}
}
// Dark theme
@media (prefers-color-scheme: dark) {
:root {
--bg: #{hsl($hue,10%,10%)};
--fg: #{hsl($hue,10%,90%)};
}
.rating {
margin: auto;
&__star {
&-stroke {
stroke: hsl($hue,10%,30%);
}
}
}
}
// Animations
@keyframes starRing {
from,
20% {
animation-timing-function: ease-in;
opacity: 1;
r: 8px;
stroke-width: 16px;
transform: scale(0);
}
35% {
animation-timing-function: ease-out;
opacity: 0.5;
r: 8px;
stroke-width: 16px;
transform: scale(1);
}
50%,
to {
opacity: 0;
r: 16px;
stroke-width: 0;
transform: scale(1);
}
}
@keyframes starFill {
from,
40% {
animation-timing-function: ease-out;
transform: scale(0);
}
60% {
animation-timing-function: ease-in-out;
transform: scale(1.2);
}
80% {
transform: scale(0.9);
}
to {
transform: scale(1);
}
}
@keyframes starStroke {
from {
transform: scale(1);
}
20%,
to {
transform: scale(0);
}
}
@keyframes starLine {
from,
40% {
animation-timing-function: ease-out;
stroke-dasharray: 1 23;
stroke-dashoffset: 1;
}
60%,
to {
stroke-dasharray: 12 13;
stroke-dashoffset: -13;
}
}
Raw
styles
<link href="https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500&amp;display=swap" rel="stylesheet" />
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment