javascript - Twitter bootstrap progress bar animation on page load

Question

I have a page with several bootstrap progress bars. Setting their values initially works fine. Though I would like the progress bars to animate/transition to their specific states when a user opens the page.

This JS works fine, when you click on one of the bars. I would need something like that on an "onload" event of the bar. But the "onload" event is not available for s

//animate progress bars
$('.progress .bar').on("click", function(event) {
  var me = $(this);
  perc = me.attr("data-percentage");
  me.css('width', perc+'%');
});

How can I achieve this behavior on page load for all progress bars on a page?

Answer 1

EDIT

• Class name changed from bar to progress-bar in v3.1.1

HTML

<div class="container">
    <div class="progress progress-striped active">
        <div class="bar" style="width: 0%;"></div>
    </div>
</div>?

CSS

@import url('http://twitter.github.com/bootstrap/assets/css/bootstrap.css');

.container {
    margin-top: 30px;
    width: 400px;
}?

jQuery used in the fiddle below and on the document.ready

$(document).ready(function(){

    var progress = setInterval(function() {
        var $bar = $('.bar');

        if ($bar.width()>=400) {
            clearInterval(progress);
            $('.progress').removeClass('active');
        } else {
            $bar.width($bar.width()+40);
        }
        $bar.text($bar.width()/4 + "%");
    }, 800);

});?

Demo

JSFiddle

Updated JSFiddle