Progress bars are constructed using a .progress wrapper containing a .bar div and a .subtitle div. The width of the progress is controlled via inline styles on the .bar element.
Modifiers for the .progress container include: primary, success, warning, error, and indeterminate (for an infinite loading state).
<!-- Standard progress bar -->
<div class="progress">
<div class="bar" style="width: 80%"></div>
<div class="subtitle">Default</div>
</div>
<!-- Success progress bar -->
<div class="progress success">
<div class="bar" style="width: 40%"></div>
<div class="subtitle">success</div>
</div>
<!-- Indeterminate progress bar -->
<div class="progress indeterminate">
<div class="bar"></div>
<div class="subtitle">indeterminate</div>
</div>