一组网格加载动画
先看效果：
再看代码：
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>网格动画title>
<style>
@import url("https://fonts.googleapis.com/css2?family=Orbitron&family=Quicksand:wght@300&display=swap");
html,
body {
background-color: #121212;
display: flex;
flex-wrap: wrap;
align-items: center;
justify-content: center;
width: 100%;
font-size: 16px;
font-weight: bold;
color: #aaa;
font-family: "Quicksand", serif;
}
@media (max-width: 800px) {
html,
body {
font-size: 13px;
}
}
@media (max-width: 650px) {
html,
body {
font-size: 10px;
}
}
.wrapper {
display: grid;
justify-content: center;
grid-template-columns: repeat(2, 1fr);
gap: 7rem 5rem;
margin: 5rem 0;
}
@media (max-width: 480px) {
.wrapper {
grid-template-columns: repeat(1, 1fr);
}
}
@media (min-width: 1300px) {
.wrapper {
grid-template-columns: repeat(3, 1fr);
}
}
.box {
--box-width: 20rem;
--box-height: 30rem;
--frag-width: calc(var(--box-width) / var(--col));
--frag-height: calc(var(--box-height) / var(--row));
--img-url: url("https://djjjk9bjm164h.cloudfront.net/leather01.jpg");
display: flex;
justify-content: center;
flex-wrap: wrap;
width: var(--box-width);
height: var(--box-height);
position: relative;
}
.box::before {
content: attr(data-title);
position: absolute;
top: calc(100% + 1.5rem);
font-size: 1.7rem;
}
.box::after {
content: "CLICK ME";
position: absolute;
width: 100%;
height: 100%;
display: flex;
align-items: center;
justify-content: center;
font-size: 1.5rem;
cursor: pointer;
color: #aaa;
background-image: repeating-linear-gradient(-45deg, rgba(100, 100, 100, 0.25), rgba(100, 100, 100, 0.25) 1px, transparent 1px, transparent 6px);
background-size: 4px 4px;
transition: all 0.2s;
}
.box.hide::after {
opacity: 0;
}
.box.hide:hover::after {
opacity: 0;
}
.box:hover::after {
background-image: initial;
font-size: 1.8rem;
}
.fragment {
--x-offset: calc(var(--x) * var(--frag-width) * -1);
--y-offset: calc(var(--y) * var(--frag-height) * -1);
--rotateX: rotateX(0);
--rotateY: rotateY(0);
width: var(--frag-width);
height: var(--frag-height);
background: var(--img-url) var(--x-offset) var(--y-offset)/var(--box-width) var(--box-height) no-repeat;
backface-visibility: hidden;
will-change: transform;
transform: var(--rotateX) var(--rotateY) scale(0.8);
animation: flip var(--duration) linear var(--delay) forwards;
opacity: 0;
}
@keyframes flip {
0% {
transform: var(--rotateX) var(--rotateY) scale(0.8);
opacity: 0;
}
15% {
transform: var(--rotateX) var(--rotateY) scale(0.8);
opacity: 0;
}
70% {
transform: rotateX(0) rotateY(0) scale(0.8);
opacity: 1;
}
100% {
transform: rotateX(0) rotateY(0) scale(1);
opacity: 1;
}
}
style>
head>
<body>
<div class="wrapper">
<div class="box" data-i="13" data-title="⇒⊚⇐">div>
<div class="box" data-i="0" data-title="↓">div>
<div class="box" data-i="1" data-title="→">div>
<div class="box" data-i="2" data-title="">div>
<div class="box" data-i="3" data-title="↖">div>
<div class="box" data-i="4" data-title="↘">div>
<div class="box" data-i="5" data-title="↗">div>
<div class="box" data-i="6" data-title="↙">div>
<div class="box" data-i="7" data-title="↖↘">div>
<div class="box" data-i="8" data-title="↘↖">div>
<div class="box" data-i="9" data-title="">div>
<div class="box" data-i="10" data-title="↙↗">div>
<div class="box" data-i="11" data-title="↗↙">div>
<div class="box" data-i="12" data-title="⇐⊚⇒">div>
div>
body>
<script>
class GridAnimation {
constructor(el, row = 13, col = 9) {
this.element = el;
this.fragments = el.children;
this.row = row;
this.col = col;
this.duration = 2000;
this.delayDelta = 70;
this.type = null;
this.randomIntBetween = (min, max) => {
return Math.floor(Math.random() * (max - min + 1) + min);
};
this.element.style.setProperty("--row", this.row);
this.element.style.setProperty("--col", this.col);
this.element.addEventListener("click", this.trigger);
}
trigger = () => {
if (this.fragments.length > 0) this.clear();
this.element.classList.add("hide");
this.animate();
};
setType = (type) => {
this.type = type;
};
clear = () => {
while (this.element.hasChildNodes()) {
this.element.removeChild(this.element.firstChild);
}
};
animate = () => {
if (this.type === null) return;
const x = this.col - 1;
const y = this.row - 1;
for (let i = 0; i < this.row; i++) {
for (let j = 0; j < this.col; j++) {
const fragment = document.createElement("div");
fragment.className = "fragment";
fragment.style.setProperty("--x", j);
fragment.style.setProperty("--y", i);
let delay = 0;
switch (this.type) {
case 0:
delay = i * 2;
break;
case 1:
delay = j * 2;
break;
case 2:
delay = this.randomIntBetween(0, x + y);
break;
case 3:
delay = x + y - (j + i);
break;
case 4:
delay = i + j;
break;
case 5:
delay = x - i + j;
break;
case 6:
delay = i + (y - j);
break;
case 7:
delay = Math.abs((x + y) / 2 - (j + i));
break;
case 8:
delay = (x + y) / 2 - Math.abs((x + y) / 2 - (j + i));
break;
case 9:
delay =
(x + y) / 2 - Math.abs((x + y) / 2 - (j + i)) * Math.cos(i + j);
break;
case 10:
delay = Math.abs((x + y) / 2 - (x - j + i));
break;
case 11:
delay = Math.abs((x + y) / 2 - Math.abs((x + y) / 2 - (x - j + i)));
break;
case 12:
delay = Math.abs(x / 2 - j) + Math.abs(y / 2 - i);
break;
case 13:
delay = x / 2 - Math.abs(x / 2 - j) + (x / 2 - Math.abs(y / 2 - i));
break;
}
const isOdd = (i + j) % 2 === 0;
fragment.style.setProperty(
"--rotateX",
`rotateX(${isOdd ? -180 : 0}deg)`
);
fragment.style.setProperty(
"--rotateY",
`rotateY(${isOdd ? 0 : -180}deg)`
);
fragment.style.setProperty("--delay", delay * this.delayDelta + "ms");
fragment.style.setProperty("--duration", this.duration + "ms");
this.element.appendChild(fragment);
const timer = setTimeout(() => {
fragment.style.willChange = "initial";
fragment.style.transform = "initial";
fragment.style.animation = "initial";
fragment.style.backfaceVisibility = "initial";
fragment.style.opacity = 1;
clearTimeout(timer);
}, this.duration + delay * this.delayDelta);
}
}
};
}
document.querySelectorAll(".box").forEach((box, index) => {
const gridAnimation = new GridAnimation(box);
const type = parseInt(box.getAttribute("data-i"));
gridAnimation.setType(type);
if (index === 0) gridAnimation.trigger();
});
script>
html>