在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
	<title>菜鸟教程(cainiaoplay.com)</title>
	<meta name="viewport" content="width=device-width, initial-scale=1"  charset="utf-8">
	<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">  
	<script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
	<script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
	
<div class="container">
	<h2>排版</h2>
	<p> .list-unstyled 类移除了默认的列表样式，列表项左对齐 (直接子元素):</p>
	<ul class="list-unstyled">
		<li>Coffee</li>
		<li>Tea
			<ul>
				<li>Black tea</li>
				<li>Green tea</li>
			</ul>
		</li>
		<li>Milk</li>
	</ul>
</div>

</body>
</html>
源代码

动行结果
