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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"/> <style> .button { display: inline-block; border-radius: 4px; background-color: #f4511e; border: none; color: #FFFFFF; text-align: center; font-size: 28px; padding: 20px; width: 200px; transition: all 0.5s; cursor: pointer; margin: 5px; } .button span { cursor: pointer; display: inline-block; position: relative; transition: 0.5s; } .button span:after { content: '»'; position: absolute; opacity: 0; top: 0; right: -20px; transition: 0.5s; } .button:hover span { padding-right: 25px; } .button:hover span:after { opacity: 1; right: 0; } </style> <h2>按钮动画</h2> <button class="button" style="vertical-align:middle"><span>Hover </span></button> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果：