<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Bootstrap 辅助类</title>
<link rel="stylesheet" href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css">
<style>
div{
width: 600px;
height: 300px;
}
</style>
</head>
<body>
<div class="container">
<div class="bg-primary">.bg-primary</div>
<div class="bg-success">.bg-success</div>
<div class="bg-info">.bg-info</div>
<div class="bg-warning">.bg-warning</div>
<div class="bg-danger">.bg-danger</div>
</div>
<script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</body>
</html>
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