Swipe cover slides

by Freer Hall

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div class="banners">
  <div class="image active" style="background-color: black;">
    <div class="content">
      Slide 1
    </div>
    <div class="spanner"></div>
    <div class="corner" style="background-color: cyan;"></div>      
  </div>

  <div class="image" style="background-color: cyan;">
    <div class="content">
      Slide 2
    </div>
    <div class="spanner"></div>
    <div class="corner" style="background-color: magenta;"></div>
  </div>
  
  <div class="image" style="background-color: magenta;">
    <div class="content">
      Slide 3
    </div>
    <div class="spanner"></div>
    <div class="corner" style="background-color: black;"></div>
  </div>
</div>

CSS

.banners {
    width: 800px;
    height: 600px;
}

.image {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    overflow:hidden;
    z-index:1;
    transition:z-index 2s step-end, 1s opacity 1s ease-in-out;
    text-align:center;
    opacity:0;
}
.image.active{
    opacity:1;
    z-index:2;
    transition:z-index 2s step-end, 0s opacity 0s;
}

.corner {
    width: 200%;
    height: 200%;
    position: absolute;
    top: -100%;
    left: -100%;
    clip-path: polygon(100% 0, 0 70%,  0 100%, 100% 100%, 100% 0, 100% 0);
    z-index:3;
    margin-left:150%;
    margin-top:150%;
    transition:2s top ease-in-out, 2s left ease-in-out, 0s margin 2s;
}
.image.active .corner{
  top:0;
  left:0;
  margin-top:0;
  margin-left:0;
  transition:0s top ease-in-out 1s, 0s left ease-in-out 1s, 2s margin ease-in-out 1s;
}
.content{
  color:#FFF;
  display:inline-block;
  vertical-align:middle;
  font-family:arial;
  text-transform:uppercase;
  font-size:24px;
}
.spanner{
  vertical-align:middle;
  width:0;
  height:100%;
  display:inline-block;
}

JavaScript

$(document).ready(function () {
    $('.corner').click(function() {
        var $parent = $(this).parent();
        $parent.removeClass("active");
        if ($parent.next().length){
        	$parent.next().addClass("active");
        } else {
        	$parent.prevAll().last().addClass("active");
        }
    });
});