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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(){ function aniDiv(){ $("div:eq(0)").animate({width:"50%"},"slow"); $("div:eq(0)").animate({width:"100%"},"slow",aniDiv); } aniDiv(); $(".btn1").click(function(){ $(":animated").css("background-color","red"); }); }); </script> <button class="btn1">修改动画元素颜色</button> <div style="background:blue;">Div 1</div> <div style="background:green;">Div 2</div> <div style="background:yellow;">Div 3</div> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果：