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代码编辑器：
<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <script src="https://cdn.staticfile.org/jquery/2.2.4/jquery.min.js"></script> <script> $(document).ready(function(){ $("button").click(function(){ var div = $("div"); startAnimation(); function startAnimation(){ div.animate({height:250},"slow"); div.animate({width:250},"slow"); div.css("background-color","blue"); div.animate({height:100},"slow"); div.animate({width:100},"slow",startAnimation); } }); }); </script> <p><button>开始动画</button></p> <div style="width:50px;height:50px;background-color:red;"></div> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果：