<!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>
<!-- 1.引入animate.css动画库 -->
<link href="https://cdn.bootcdn.net/ajax/libs/animate.css/4.1.1/animate.compat.css" rel="stylesheet">
<style>
div {
width: 200px;
height: 200px;
background: brown;
margin: 100px auto;
}
</style>
</head>
<body>
<!-- 2.先加animated父类选择器，再加动画样式类选择器，infinite是无限次循环类选择器 -->
<div class="animated tada infinite"></div>
</body>
</html>
