Example:

    <!-- Stop at this slide.
         (For example, when used on the last slide, this prevents the 
         presentation from wrapping back to the beginning.) -->
    <div class="step stop">

The stop plugin is a pre-stepleave plugin. It is executed before impress:stepleave event. If the current slide has class="stop" set, it will disable the next() command by setting the next slide to the current slide.

Copyright 2016 Henrik Ingo (@henrikingo) Released under the MIT license.