有谁知道为什么我的Bootstrap进度条不起作用?
<link type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet">
<div class="progress">
<div class="progress-bar progress-bar-striped active" role="progressbar"
aria-valuenow="40" aria-valuemin="0" aria-valuemax="100" style="width:40%">
40%
</div>
</div>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
它没有条纹或活动。
米克