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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> :target { border: 2px solid #D4D4D4; background-color: #e5eecc; } </style> <h1>This is a heading</h1> <p><a href="#news1">Jump to New content 1</a></p> <p><a href="#news2">Jump to New content 2</a></p> <p>Click on the links above and the :target selector highlight the current active HTML anchor.</p> <p id="news1"><b>New content 1...</b></p> <p id="news2"><b>New content 2...</b></p> <p><b>注意:</b> IE 8 以及更早版本的浏览器不支持 :target 选择器.</p> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
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