These classes are used in conjunction with the slide and slideshow components.
See UIkit Document<div class="js-slideshow-animation" uk-slideshow="clsActive: uk-active-primary; ratio: 3:2; autoplay: true">
<div class="uk-position-relative uk-visible-toggle uk-light" tabindex="-1">
<ul class="uk-slideshow-items">
<li>
<img src="../images/a.jpg" alt="" uk-cover>
<div class="uk-position-center uk-position-small uk-text-center">
<h2 uk-slideshow-parallax="x: 100,-100">Heading</h2>
<p uk-slideshow-parallax="x: 200,-200">Lorem ipsum dolor sit amet.</p>
</div>
</li>
<li>
<img src="../images/b.jpg" alt="" uk-cover>
<div class="uk-position-center uk-position-small uk-text-center">
<h2 uk-slideshow-parallax="x: 100,-100">Heading</h2>
<p uk-slideshow-parallax="x: 200,-200">Lorem ipsum dolor sit amet.</p>
</div>
</li>
</ul>
<a class="uk-position-center-left uk-position-small uk-hidden-hover" href="#" uk-slidenav-previous uk-slideshow-item="previous"></a>
<a class="uk-position-center-right uk-position-small uk-hidden-hover" href="#" uk-slidenav-next uk-slideshow-item="next"></a>
</div>
<ul class="uk-dotnav uk-flex-center uk-margin">
<li uk-slideshow-item="0"><a href="#">Item 1</a></li>
<li uk-slideshow-item="1"><a href="#">Item 2</a></li>
</ul>