Animating Bootstrap Progress Bar Width With Jquery

I want to animate a progress bar's width from 0% to 70% over 2.5 seconds. However, the code below immediately changes the width to 70% after a 2.5 second delay. What am I missing?

Solution 1:

The problem is in default Bootstrap transition effect, which animates any update of the width property.

If you switch it off with supressing the corresponding style, it will work fine, e.g.:

.progress-bar {
    -webkit-transition: none !important;
    transition: none !important;
}

DEMO:http://jsfiddle.net/WEYKL/1/

Solution 2:

So, it makes more sense to adjust the transition effect via CSS or jQuery.

.progress-bar {
    -webkit-transition: width 2.5s ease;
    transition: width 2.5s ease;
}

And just change the width value.

$(".progress-bar").css('width', '70%');

Solution 3:

IT'S very EASY if uses bootstrap progress bar,

only add attrib aria-valuenow="percent_required%" to div with class "progress-bar" like this:

<div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="57%" aria-valuemin="0" aria-valuemax="57">

Next, on script:

<script>
  $(document).on('ready',function(){
    $('.progress .progress-bar').css("width",function() {
      return $(this).attr("aria-valuenow") + "%";
    })
  })
</script>

Reload, Go!

Solution 4:

You can fix it by adding:

.progress.progress-bar {
  transition: unset;
}

var delay = 500;
$(".progress-bar").each(function(i) {
  $(this).delay(delay * i).animate({
    width: $(this).attr('aria-valuenow') + '%'
  }, delay);

  $(this).prop('Counter', 0).animate({
    Counter: $(this).text()
  }, {
    duration: delay,
    // easing: 'swing',step: function(now) {
      $(this).text(Math.ceil(now) + '%');
    }
  });
});

.progress {
  margin-bottom: 20px;
}

.progress-bar {
  width: 0;
}

.bg-purple {
  background-color: #825CD6!important;
}

.progress.progress-bar {
  transition: unset;
}

<scriptsrc="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><linkrel="stylesheet"href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"><scriptsrc="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script><divclass="container"><h2>Bootstrap 4 Progress Bars</h2><divclass="progress border"><divclass="progress-bar progress-bar-striped progress-bar-animated bg-danger"role="progressbar"aria-valuenow="70"aria-valuemin="0"aria-valuemax="100">70</div></div><divclass="progress border"><divclass="progress-bar progress-bar-striped progress-bar-animated"role="progressbar"aria-valuenow="50"aria-valuemin="0"aria-valuemax="100">50</div></div><divclass="progress border"><divclass="progress-bar progress-bar-striped progress-bar-animated bg-purple"role="progressbar"aria-valuenow="90"aria-valuemin="0"aria-valuemax="100">90</div></div></div>