前言
我分享一个前端案例，代码来源我不确定，可能是我某个编程技术交流群的群友分享的。由于我设置了自动下载文件，今天在查看微信文件时偶然发现了这个案例，查看下载日期是6月7日，所以无法确定到底是哪个群友分享的。但是我觉得这个案例效果很有趣，实际上我自己没有能力实现这个案例，因此想和大家分享一下！
案例代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
*,
*:after,
*:before {
box-sizing: border-box;
}
:root {
--slide-ease: cubic-bezier(.4, -0.3, .6, 1.3);
/* --slide-ease: cubic-bezier(.8,-0.3,.2,1.3); */
--easing: var(--slide-ease);
--speed: 0.5s;
--width: clamp(200px, 45vmin, 500px);
--ar: 8 / 3;
--ray: hsl(0 0% 100% / 0.5);
--sun: hsl(47, 91%, 58%);
--moon: hsl(212, 13%, 82%);
--crater: hsl(221, 16%, 68%);
--bg: hsl(219, 30%, 88%);
--bear-speed: 10s;
--color: hsl(219 30% 20%);
}
[data-dark-mode=true] {
--bg: hsl(219, 30%, 12%);
--color: hsl(219 30% 98%);
}
body {
display: grid;
place-items: center;
min-height: 100vh;
overflow: hidden;
background: var(--bg);
transition: background var(--speed) var(--easing);
font-family: sans-serif, system-ui;
}
.toggle__backdrop:first-of-type .clouds path:first-of-type {
fill: var(--ray);
}
.toggle {
-webkit-tap-highlight-color: transparent;
width: var(--width);
/* random attempts at tackling the overflow iOS issue */
z-index: 10;
will-change: transform;
isolation: isolate;
transform: translate3d(0, 0, 0);
/* End of workaround city */
aspect-ratio: var(--ar);
border-radius: 100vh;
border: 0;
position: relative;
padding: 0;
overflow: hidden;
cursor: pointer;
transition: background var(--speed) var(--easing);
--sky: hsl(204, 53%, 47%);
--night: hsl(229, 25%, 16%);
outline-color: transparent;
background: hsl(calc(204 + (var(--dark, 0) * 25)) calc((53 - (var(--dark, 0) * 28)) * 1%) calc((47 - (var(--dark, 0) * 31)) * 1%));
box-shadow:
calc(var(--width) * 0) calc(var(--width) * 0.02) calc(var(--width) * 0.01) calc(var(--width) * -0.0025) hsl(210 10% 100% / 0.95),
calc(var(--width) * 0) calc(var(--width) * -0.02) calc(var(--width) * 0.01) calc(var(--width) * -0.0025) hsl(210 10% 10% / 0.2),
calc(var(--width) * 0) calc(var(--width) * 0.02) calc(var(--width) * 0.5) 0 hsl(210 10% 100% / 0.15);
}
.toggle:after {
content: "";
position: absolute;
inset: 0;
box-shadow:
calc(var(--width) * 0) calc(var(--width) * -0.025) calc(var(--width) * 0.025) 0 hsl(210 10% 10% / 0.15) inset,
calc(var(--width) * 0) calc(var(--width) * 0.025) calc(var(--width) * 0.025) 0 hsl(210 10% 10% / 0.65) inset;
border-radius: 100vh;
}
.toggle__content {
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
overflow: hidden;
border-radius: 100vh;
display: block;
clip-path: inset(0 0 0 0 round 100vh);
}
.toggle__backdrop {
overflow: visible !important;
position: absolute;
bottom: 0;
width: 100%;
left: 0;
transition: translate var(--speed) var(--easing);
translate: 0 calc(var(--dark, 0) * (100% - (3 / 8 * var(--width))));
}
[aria-pressed=false] .toggle__backdrop:last-of-type {
transition-timing-function: cubic-bezier(.2, -0.6, .7, 1.6);
}
[aria-pressed=false] .stars path {
transition-delay: 0s;
}
.stars path {
transform-box: fill-box;
transform-origin: 25% 50%;
scale: calc(0.25 + (var(--dark, 0) * 0.75));
transition: scale var(--speed) calc(var(--speed) * 0.5) var(--easing);
}
.toggle__indicator {
height: 100%;
aspect-ratio: 1;
border-radius: 0%;
display: grid;
place-items: center;
padding: 3%;
}
.pilot-bear {
position: absolute;
width: 25%;
}
.toggle__star {
height: 100%;
aspect-ratio: 1;
border-radius: 50%;
position: relative;
transition: translate var(--speed) var(--easing);
translate: calc((var(--dark, 0) * -10%) + 5%) 0;
/* translate: calc((var(--dark, 0) * -18%) + 5%) 0; */
}
.sun {
background: var(--sun);
position: absolute;
inset: 0;
border-radius: 50%;
overflow: hidden;
box-shadow:
calc(var(--width) * 0.01) calc(var(--width) * 0.01) calc(var(--width) * 0.02) 0 hsl(210 10% 100% / 0.95) inset,
calc(var(--width) * -0.01) calc(var(--width) * -0.01) calc(var(--width) * 0.02) 0 hsl(210 10% 20% / 0.5) inset;
}
.moon {
position: absolute;
inset: -1%;
border-radius: 50%;
background: var(--moon);
transition: translate var(--speed) ease-in-out;
translate: calc((100 - (var(--dark, 0) * 100)) * 1%) 0%;
box-shadow:
calc(var(--width) * 0.01) calc(var(--width) * 0.01) calc(var(--width) * 0.02) 0 hsl(210 10% 100% / 0.95) inset,
calc(var(--width) * -0.01) calc(var(--width) * -0.01) calc(var(--width) * 0.02) 0 hsl(210 10% 10% / 0.95) inset;
}
.moon__crater {
position: absolute;
background: var(--crater);
border-radius: 50%;
width: calc(var(--size, 10) * 1%);
aspect-ratio: 1;
left: calc(var(--x) * 1%);
top: calc(var(--y) * 1%);
box-shadow:
calc(var(--width) * 0.01) calc(var(--width) * 0.01) calc(var(--width) * 0.01) 0 hsl(210 10% 6% / 0.25) inset,
0 calc(var(--width) * 0.005) calc(var(--width) * 0.01) 0 hsl(210 10% 100% / 0.25);
}
.moon__crater:nth-of-type(1) {
--size: 18;
--x: 40;
--y: 15;
}
.moon__crater:nth-of-type(2) {
--size: 20;
--x: 65;
--y: 58;
}
.moon__crater:nth-of-type(3) {
--size: 34;
--x: 18;
--y: 40;
}
.toggle__star:before {
content: "";
z-index: -1;
width: 356%;
background:
radial-gradient(hsl(0 0% 100% / 0.25) 40%, transparent 40.5%),
radial-gradient(hsl(0 0% 100% / 0.25) 56%, transparent 56.5%) hsl(0 0% 100% / 0.25);
border-radius: 50%;
aspect-ratio: 1;
position: absolute;
top: 50%;
left: 50%;
transition: translate var(--speed) var(--easing);
translate: calc((50 - (var(--dark, 0) * 4)) * -1%) -50%;
}
.toggle__star:after {
content: "";
position: absolute;
inset: 0;
display: block;
background: hsl(0 0% 0% / 0.5);
filter: blur(4px);
translate: 2% 4%;
border-radius: 50%;
z-index: -1;
}
.toggle__indicator-wrapper {
position: absolute;
inset: 0;
transition: translate var(--speed) var(--slide-ease);
translate: calc(var(--dark, 0) * (var(--width) - (3 / 8 * var(--width)))) 0;
}
[aria-pressed=true] {
--dark: 1;
}
/* Fun stuff! */
/* We have 11 stars */
.stars g {
transform-box: fill-box;
transform-origin: 50% 50%;
}
.stars g:nth-of-type(3) {
animation: twinkle 4s -2s infinite;
}
.stars g:nth-of-type(11) {
animation: twinkle 6s -2s infinite;
}
.stars g:nth-of-type(9) {
animation: twinkle 4s -1s infinite;
}
@keyframes twinkle {
0%,
40%,
60%,
100% {
transform: scale(1);
}
50% {
transform: scale(0);
}
}
.astrobear {
width: 12%;
position: absolute;
top: 100%;
left: 0%;
transition: translate calc(var(--speed) + (var(--dark, 0) * (var(--bear-speed) - var(--speed)))) calc(var(--bear-speed) * (0.4 * var(--dark, 0))) linear;
translate: calc(var(--dark, 0) * 400%) calc(var(--dark, 0) * -350%);
}
.astrobear svg {
transform-origin: 50% 75%;
scale: var(--dark, 0);
rotate: calc(var(--dark, 0) * 360deg);
transition: rotate calc(var(--speed) + (var(--dark, 0) * (var(--bear-speed) - var(--speed)))) calc(var(--bear-speed) * 0.4) linear, scale var(--speed) ease-in-out;
}
.astrobear__container {
position: absolute;
overflow: hidden;
inset: 0;
clip-path: inset(0 0 0 0);
opacity: var(--dark, 0);
translate: 0 calc(-200% + (var(--dark, 0) * 200%));
transition: opacity var(--speed) var(--easing), translate var(--speed) var(--easing);
}
.pilot__container {
position: absolute;
overflow: hidden;
inset: 0;
clip-path: inset(0 0 0 0);
opacity: calc(1 - var(--dark, 0));
translate: 0 calc(var(--dark, 0) * 200%);
transition: opacity var(--speed) var(--easing), translate var(--speed) var(--easing);
}
.pilot-bear {
width: 18%;
position: absolute;
top: 70%;
left: 100%;
transition:
translate calc(var(--speed) + ((1 - var(--dark, 0)) * ((var(--bear-speed) * 0.5) - var(--speed)))) calc((var(--bear-speed) * 0.5) * ((1 - var(--dark, 0)) * 0.4)) linear;
translate:
calc((0 - (1 - var(--dark, 0))) * (var(--width) + 100%)) calc((0 - (1 - var(--dark, 0))) * (200%));
}
.pilot {
rotate: 12deg;
animation: fly 4s infinite ease-in-out;
width: 100%;
}
@keyframes fly {
50% {
translate: 0 -25%;
}
}
.controls {
position: fixed;
bottom: 1rem;
right: 1rem;
display: flex;
align-items: center;
gap: 0.5rem;
font-family: sans-serif;
color: var(--color);
transition: color var(--speed) var(--easing);
}
[type=checkbox] {
accent-color: var(--color);
transition: accent-color var(--speed) var(--easing);
}
</style>
</head>
<body>
<div class="controls">
<label for="sync">Sync <body></label>
<input id="sync" type="checkbox" />
</div>
<!-- 背景色控制 -->
<button class="toggle" aria-pressed="false" title="Toggle Dark Mode">
<span class="toggle__content">
<!-- light模式的云2 -->
<svg aria-hidden=true class="toggle__backdrop" xmlns="http://www.w3.org/2000/svg" fill="none"
viewBox="0 0 290 228">
<g class="clouds">
<path fill="#D9D9D9"
d="M335 147.5c0 27.89-22.61 50.5-50.5 50.5a50.78 50.78 0 0 1-9.29-.853c-2.478 12.606-10.595 23.188-21.615 29.011C245.699 243.749 228.03 256 207.5 256a50.433 50.433 0 0 1-16.034-2.599A41.811 41.811 0 0 1 166 262a41.798 41.798 0 0 1-22.893-6.782A42.21 42.21 0 0 1 135 256a41.82 41.82 0 0 1-19.115-4.592A41.84 41.84 0 0 1 88 262c-1.827 0-3.626-.117-5.391-.343C74.911 270.448 63.604 276 51 276c-23.196 0-42-18.804-42-42s18.804-42 42-42c1.827 0 3.626.117 5.391.343C64.089 183.552 75.396 178 88 178a41.819 41.819 0 0 1 19.115 4.592C114.532 176.002 124.298 172 135 172a41.798 41.798 0 0 1 22.893 6.782 42.066 42.066 0 0 1 7.239-.773C174.137 164.159 189.749 155 207.5 155c.601 0 1.199.01 1.794.031A41.813 41.813 0 0 1 234 147h.002c.269-27.66 22.774-50 50.498-50 27.89 0 50.5 22.61 50.5 50.5Z" />
</g>
</svg>
<!-- light模式的小飞机 -->
<span aria-hidden=true class="pilot__container">
<span class="pilot-bear">
<img
src="https://p6-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/f13edbe752dd4d11b7c394aaf0f68637~tplv-k3u1fbpfcp-watermark.image?"
alt="pilot-bear" class="pilot" />
</span>
</span>
<!-- light模式的云1 -->
<svg aria-hidden=true class="toggle__backdrop" xmlns="http://www.w3.org/2000/svg" fill="none"
viewBox="0 0 290 228">
<g class="clouds">
<path fill="#fff"
d="M328 167.5c0 15.214-7.994 28.56-20.01 36.068.007.31.01.621.01.932 0 23.472-19.028 42.5-42.5 42.5-3.789 0-7.461-.496-10.957-1.426C249.671 263.676 233.141 277 213.5 277a42.77 42.77 0 0 1-7.702-.696C198.089 284.141 187.362 289 175.5 289a42.338 42.338 0 0 1-27.864-10.408A42.411 42.411 0 0 1 133.5 281c-4.36 0-8.566-.656-12.526-1.876C113.252 287.066 102.452 292 90.5 292a42.388 42.388 0 0 1-15.8-3.034A42.316 42.316 0 0 1 48.5 298C25.028 298 6 278.972 6 255.5S25.028 213 48.5 213a42.388 42.388 0 0 1 15.8 3.034A42.316 42.316 0 0 1 90.5 207c4.36 0 8.566.656 12.526 1.876C110.748 200.934 121.548 196 133.5 196a42.338 42.338 0 0 1 27.864 10.408A42.411 42.411 0 0 1 175.5 204c2.63 0 5.204.239 7.702.696C190.911 196.859 201.638 192 213.5 192c3.789 0 7.461.496 10.957 1.426 2.824-10.491 9.562-19.377 18.553-24.994-.007-.31-.01-.621-.01-.932 0-23.472 19.028-42.5 42.5-42.5s42.5 19.028 42.5 42.5Z" />
</g>
</svg>
<span class="toggle__indicator-wrapper">
<span class="toggle__indicator">
<span class="toggle__star">
<span class="sun">
<span class="moon">
<span class="moon__crater"></span>
<span class="moon__crater"></span>
<span class="moon__crater"></span>
</span>
</span>
</span>
</span>
</span>
<!-- dark模式的星星 -->
<svg aria-hidden=true class="toggle__backdrop" xmlns="http://www.w3.org/2000/svg" fill="none"
viewBox="0 0 290 228">
<g>
<g class="stars">
<g>
<path fill="#fff" fill-rule="evenodd"
d="M61 11.5a.75.75 0 0 1 .721.544l.813 2.846a3.75 3.75 0 0 0 2.576 2.576l2.846.813a.75.75 0 0 1 0 1.442l-2.846.813a3.749 3.749 0 0 0-2.576 2.576l-.813 2.846a.75.75 0 0 1-1.442 0l-.813-2.846a3.749 3.749 0 0 0-2.576-2.576l-2.846-.813a.75.75 0 0 1 0-1.442l2.846-.813a3.749 3.749 0 0 0 2.576-2.576l.813-2.846A.75.75 0 0 1 61 11.5Z"
clip-rule="evenodd" />
</g>
<g>
<path fill="#fff" fill-rule="evenodd"
d="M62.5 45.219a.329.329 0 0 1 .315.238l.356 1.245a1.641 1.641 0 0 0 1.127 1.127l1.245.356a.328.328 0 0 1 0 .63l-1.245.356a1.641 1.641 0 0 0-1.127 1.127l-.356 1.245a.328.328 0 0 1-.63 0l-.356-1.245a1.641 1.641 0 0 0-1.127-1.127l-1.245-.356a.328.328 0 0 1 0-.63l1.245-.356a1.641 1.641 0 0 0 1.127-1.127l.356-1.245a.328.328 0 0 1 .315-.238Z"
clip-rule="evenodd" />
</g>
<g>
<path fill="#fff" fill-rule="evenodd"
d="M32 31.188a.28.28 0 0 1 .27.204l.305 1.067a1.405 1.405 0 0 0 .966.966l1.068.305a.28.28 0 0 1 0 .54l-1.068.305a1.405 1.405 0 0 0-.966.966l-.305 1.068a.28.28 0 0 1-.54 0l-.305-1.068a1.406 1.406 0 0 0-.966-.966l-1.067-.305a.28.28 0 0 1 0-.54l1.067-.305a1.406 1.406 0 0 0 .966-.966l.305-1.068a.281.281 0 0 1 .27-.203Z"
clip-rule="evenodd" />
</g>
<g>
<path fill="#fff" fill-rule="evenodd"
d="M41.5 74.219a.329.329 0 0 1 .315.238l.356 1.245a1.641 1.641 0 0 0 1.127 1.127l1.245.356a.328.328 0 0 1 0 .63l-1.245.356a1.641 1.641 0 0 0-1.127 1.127l-.356 1.245a.328.328 0 0 1-.63 0l-.356-1.245a1.641 1.641 0 0 0-1.127-1.127l-1.245-.356a.328.328 0 0 1 0-.63l1.245-.356a1.641 1.641 0 0 0 1.127-1.127l.356-1.245a.328.328 0 0 1 .315-.238Z"
clip-rule="evenodd" />
</g>
<g>
<path fill="#fff" fill-rule="evenodd"
d="M34 83.188a.28.28 0 0 1 .27.203l.305 1.068a1.405 1.405 0 0 0 .966.966l1.068.305a.28.28 0 0 1 0 .54l-1.068.305a1.405 1.405 0 0 0-.966.966l-.305 1.068a.28.28 0 0 1-.54 0l-.305-1.068a1.406 1.406 0 0 0-.966-.966l-1.068-.305a.28.28 0 0 1 0-.54l1.068-.305a1.406 1.406 0 0 0 .966-.966l.305-1.068a.281.281 0 0 1 .27-.204Z"
clip-rule="evenodd" />
</g>
<g>
<path fill="#fff" fill-rule="evenodd"
d="M63 89.25a.375.375 0 0 1 .36.272l.407 1.423a1.874 1.874 0 0 0 1.288 1.288l1.423.406a.374.374 0 0 1 0 .722l-1.423.406a1.874 1.874 0 0 0-1.288 1.288l-.407 1.423a.374.374 0 0 1-.72 0l-.407-1.423a1.874 1.874 0 0 0-1.288-1.288l-1.423-.406a.374.374 0 0 1 0-.722l1.423-.406a1.874 1.874 0 0 0 1.288-1.288l.407-1.423a.376.376 0 0 1 .36-.272Z"
clip-rule="evenodd" />
</g>
<g>
<path fill="#fff" fill-rule="evenodd"
d="M110.5 53.156a.236.236 0 0 1 .225.17l.254.89a1.174 1.174 0 0 0 .805.805l.89.254a.23.23 0 0 1 .122.084.233.233 0 0 1-.122.366l-.89.254a1.167 1.167 0 0 0-.805.805l-.254.89a.232.232 0 0 1-.225.17.235.235 0 0 1-.225-.17l-.254-.89a1.174 1.174 0 0 0-.805-.805l-.89-.254a.23.23 0 0 1-.122-.084.233.233 0 0 1 .122-.366l.89-.254a1.167 1.167 0 0 0 .805-.805l.254-.89a.232.232 0 0 1 .225-.17Z"
clip-rule="evenodd" />
</g>
<g>
<path fill="#fff" fill-rule="evenodd"
d="M120 27.188a.279.279 0 0 1 .27.204l.305 1.067a1.41 1.41 0 0 0 .966.966l1.067.305a.283.283 0 0 1 .148.1.286.286 0 0 1 0 .34.283.283 0 0 1-.148.1l-1.067.305a1.403 1.403 0 0 0-.966.966l-.305 1.067a.279.279 0 0 1-.439.147.275.275 0 0 1-.101-.147l-.305-1.067a1.41 1.41 0 0 0-.966-.966l-1.068-.305a.284.284 0 0 1-.147-.1.286.286 0 0 1 0-.34.284.284 0 0 1 .147-.1l1.068-.305a1.405 1.405 0 0 0 .966-.966l.305-1.067a.279.279 0 0 1 .27-.204Z"
clip-rule="evenodd" />
</g>
<g>
<path fill="#fff" fill-rule="evenodd"
d="M155 28.5a.753.753 0 0 1 .721.544l.813 2.846a3.746 3.746 0 0 0 2.576 2.576l2.846.813a.747.747 0 0 1 .543.721.75.75 0 0 1-.543.721l-2.846.813a3.75 3.75 0 0 0-2.576 2.576l-.813 2.846a.747.747 0 0 1-.721.543.749.749 0 0 1-.721-.543l-.813-2.846a3.746 3.746 0 0 0-2.576-2.576l-2.846-.813a.747.747 0 0 1-.543-.721.75.75 0 0 1 .543-.721l2.846-.813a3.75 3.75 0 0 0 2.576-2.576l.813-2.846A.751.751 0 0 1 155 28.5Z"
clip-rule="evenodd" />
</g>
<g>
<path fill="#fff" fill-rule="evenodd"
d="M147 60.25a.377.377 0 0 1 .36.272l.407 1.423a1.883 1.883 0 0 0 1.288 1.288l1.423.407a.375.375 0 0 1 0 .72l-1.423.407a1.875 1.875 0 0 0-1.288 1.288l-.407 1.423a.371.371 0 0 1-.36.272.377.377 0 0 1-.36-.272l-.407-1.423a1.883 1.883 0 0 0-1.288-1.288l-1.423-.406a.375.375 0 0 1 0-.722l1.423-.406a1.875 1.875 0 0 0 1.288-1.288l.407-1.423a.372.372 0 0 1 .36-.272Z"
clip-rule="evenodd" />
</g>
<g>
<path fill="#fff" fill-rule="evenodd"
d="M125.5 76.344a.513.513 0 0 1 .496.374l.559 1.956a2.574 2.574 0 0 0 1.771 1.771l1.956.56a.514.514 0 0 1 .27.805.514.514 0 0 1-.27.186l-1.956.559a2.57 2.57 0 0 0-1.771 1.77l-.559 1.957a.514.514 0 0 1-.806.27.514.514 0 0 1-.186-.27l-.559-1.956a2.574 2.574 0 0 0-1.771-1.771l-1.956-.56a.514.514 0 0 1-.27-.805.514.514 0 0 1 .27-.186l1.956-.559a2.57 2.57 0 0 0 1.771-1.77l.559-1.957a.515.515 0 0 1 .496-.374Z"
clip-rule="evenodd" />
</g>
</g>
</g>
</svg>
<!-- 太空熊动画 -->
<span class="astrobear__container">
<span class="astrobear">
<svg aria-hidden=true xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 316 432">
<circle cx="158" cy="143" r="140" fill="#444" />
<circle cx="158" cy="143" r="140" fill="url(#a)" fill-opacity=".2" />
<circle cx="158" cy="143" r="140" stroke="#000" stroke-width="6" />
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