<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<h1>js loading Progress bar</h1>
<div class="progress" width="20">
<div class="progress-bar progress-bar-striped active" role="progressbar" aria-valuenow="45" aria-valuemin="0" aria-valuemax="100" style="width: 100%">
<h4 class="modal-title" id="myModalLabel"><p id="demo"></p>%</h4>
</div>
</div>
body{
background-color: #58FAF4;
}
var myVar=setInterval(function(){myTimer()},1);
var count = 0;
function myTimer() {
if(count < 100){
$('.progress').css('width', count + "%");
count += 0.05;
document.getElementById("demo").innerHTML = Math.round(count) +"%";
// code to do when loading
}
else if(count > 99){
// code to do after loading
count = 0;
}
}