<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
html{
font-size: 14px;
}
#app{
background:#fff000;
height:300px;
width:600px;
text-align: center;
line-height: 300px;
}
#app:hover{
/*animation 关键帧动画 必须有执行时间alternate 表示反向动画*/
animation:my 2s ease infinite alternate;
border:3px red solid;
}
/*也可以简单的from{} to{}*/
@keyframes my {
0%{
font-size: 4rem;
background:red;
opacity: 1;
/*矩阵函数的参数必须有单位 除了scale*/
transform:translate(0px,40px) rotate(0deg) scale(1)
}
50%{
font-size: 0.5rem;
opacity: .5;
background:orangered;
transform:translate(50px,40px) rotate(0deg) scale(0.5)
}
100%{
font-size: 1rem;
opacity:0;
background:indianred;
transform:translate(100px,40px) rotate(360deg) scale(0.3)
}
}
</style>
</head>
<body>
<div id="app">
Hi 你好
</div>
</body>
</html>