<html lang="en">
<head>
<meta charset="utf-8">
<title>.addClass() 演示</title>
<link rel="stylesheet" href="https://libs.baidu.com/jqueryui/1.10.4/css/jquery-ui.min.css">
<style>
div {
width: 100px;
height: 100px;
background-color: #ccc;
}
.big-blue {
width: 200px;
height: 200px;
background-color: #00f;
}
</style>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script src="https://libs.baidu.com/jqueryui/1.10.4/jquery-ui.min.js"></script>
</head>
<body>
<div></div>
<script>
$( "div" ).click(function() {
$( this ).addClass( "big-blue", 1000, "easeOutBounce" );
});
</script>
</body>
</html>