在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8"> 
	<title>Bootstrap 实例 - 进度条</title>
	<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="progress">
	<div class="progress-bar" role="progressbar" aria-valuenow="60"
		 aria-valuemin="0" aria-valuemax="100" style="width: 40%;">
		<span class="sr-only">40% 完成</span>
	</div>
</div>

</body>
</html>
源代码

动行结果
