<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Bootstrap 实例 - 交替的进度条</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 id="pp" class="progress-bar progress-bar-success" role="progressbar"
aria-valuenow="60" aria-valuemin="0" aria-valuemax="100"
style="width: 90%;">
<span class="sr-only">90% 完成（成功）</span>
</div>
</div>
</body>
<script type="text/javascript">
$(function(){
var ss = 0;
setInterval(function () {
$("#pp").css('width', ss + '%');
ss++;
console.log(ss);
}, 1000);
});
</script>
</html>
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