<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
.box {
width: 200px;
height: 200px;
background-color: red;
/* animation: change 1s 2s; */
/* forwards 在动画后 后固定*/
animation: change1 1s linear forwards,
change2 1s linear 1s forwards,
change3 1s linear 2s forwards;
}
@keyframes change1 {
/* 宽200 变成 宽400*/
from {
width: 200px;
}
to {
width: 400px;
}
}
@keyframes change2 {
/*高200 变成 高度400 */
from {
width: 400px;
height: 200px;
}
to {
width: 400px;
height: 400px;
}
}
@keyframes change3 {
/*背景色红色 变成 绿色*/
from {
width: 400px;
height: 400px;
background-color: red;
}
to {
width: 400px;
height: 400px;
background-color: green;
}
}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>
来源：https://www.cnblogs.com/divtab/p/11588657.html