A new slider can be created by specifying it with
<input type="range" min="0" max="100" step="1" value="0" />
Please be aware that a width and height for the slider need to be expressively set, otherwise it won’t work properly. If you want a vertical slider, you can specify
<input type="range" class="vertical" />
Even on a vertical slider, you still need to set width and height as if it were horizontal and than turned (because of CSS transform properties).