j7nn7k j7nn7k - 1 month ago 18
Javascript Question

Twitter bootstrap progress bar animation on page load

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

While Tats_innit's answer has a nice touch to it, I had to do it a bit differently since I have more than one progress bar on the page.

here's my solution:

JSfiddle: http://jsfiddle.net/vacNJ/

HTML (example):

<div class="progress progress-success">
<div class="bar" style="float: left; width: 0%; " data-percentage="60"></div>
</div>

<div class="progress progress-success">
<div class="bar" style="float: left; width: 0%; " data-percentage="50"></div>
</div>

<div class="progress progress-success">
<div class="bar" style="float: left; width: 0%; " data-percentage="40"></div>
</div>

‚Äč

JavaScript:

setTimeout(function(){

    $('.progress .bar').each(function() {
        var me = $(this);
        var perc = me.attr("data-percentage");

        var current_perc = 0;

        var progress = setInterval(function() {
            if (current_perc>=perc) {
                clearInterval(progress);
            } else {
                current_perc +=1;
                me.css('width', (current_perc)+'%');
            }

            me.text((current_perc)+'%');

        }, 50);

    });

},300);

@Tats_innit: Using setInterval() to dynamically recalc the progress is a nice solution, thx mate! ;)

EDIT:

A friend of mine wrote a nice jquery plugin for custom twitter bootstrap progress bars. Here's a demo: http://minddust.github.com/bootstrap-progressbar/

Here's the Github repo: https://github.com/minddust/bootstrap-progressbar