简单教程
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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> p:before { content:"Read this -"; } </style> <p>My name is Donald</p> <p>I live in Ducksburg</p> <p><b>注意:</b> :before 作用于 IE8,DOCTYPE 必须已经声明.</p> <footer>简单教程,简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果: