HTMLDemo代码
<!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">
<link rel="stylesheet" href="style.css">
<title>Document</title>
</head>
<body>
<section><span></span></section>
</body>
</html>
CSS
html, body {
margin: 0;
height: 100%;
}
body {
display: flex;
justify-content: center;
align-items: center;
background: #ed556a;
}
section {
width: 650px;
height: 300px;
padding: 10px;
position: relative;
display: flex;
align-items: center;
justify-content: center;
border: 2px solid white;
}
span {
width: 48px;
height: 48px;
display: inline-block;
position: relative;
background: white;
animation: loading 3s linear infinite;
}
@keyframes loading {
/*先x轴翻转180度 后y轴翻转180度*/
0% {
transform: perspective(200px) rotateX(0deg) rotateY(0deg);
}
50% {
transform: perspective(200px) rotateX(-180deg) rotateY(0deg);
}
100% {
transform: perspective(200px) rotateX(-180deg) rotateY(-180deg)
}
}
原理详解
步骤1
使用span标签,设置为
- 宽度、高度均为48px
- 背景色:白色
width: 48px;
height: 48px;
background: white;
效果图如下
步骤2
为span添加动画
- 先绕x轴翻转180度
- 后绕y轴翻转180度
@keyframes loading {
/*先x轴翻转180度 后y轴翻转180度*/
0% {
transform: perspective(200px) rotateX(0deg) rotateY(0deg);
}
50% {
transform: perspective(200px) rotateX(-180deg) rotateY(0deg);
}
100% {
transform: perspective(200px) rotateX(-180deg) rotateY(-180deg)
}
}
效果图如下