如果只是简单的几个小动画 确实没必要引入一个动画库 去做 除非你的项目中很需要各种各样的动画
<!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>
div.parent {
display: flex;
}
.child {
height: 50px;
width: 200px;
background-color: #aaf;
text-align: center;
line-height: 50px;
border-radius: 16px;
position: relative;
top: 100px;
left: 50%;
transform: translateX(-50%);
transition: all 1s;
animation: jump .5s ease-in-out infinite alternate;
}
.child::after {
content: "";
height: 0;
width: 0;
position: absolute;
bottom: -20px;
left: 50%;
transform: translateX(-50%);
border: 10px solid;
border-color: #aaf transparent transparent transparent;
}
@keyframes jump {
from {
top: 100px; }
to {
top: 120px }
}
</style>
</head>
<body>
<div class="parent">
<div class="child">
一个简单的跳动动画
</div>
</div>
</body>
</html>
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