Interactive Split Screen Slider With JavaScript And CSS3

A split screen slider built using JavaScript and CSS that can be used to compare two different images with an interactive skewed slider.

How to use it:

Create the html for the split screen slider.

<section id="wrapper" class="skewed">
  <div class="layer bottom">
    <div class="content-wrap">
      <div class="content-body">
        <h1>Before</h1>
        <p>
          <div>Description</div>
        </p>
      </div>
      <img src="img/a1.jpg" alt="Before">
    </div>
  </div>
  <div class="layer top">
    <div class="content-wrap">
      <div class="content-body">
        <h1>After</h1>
        <p>
          <div>Description</div>
        </p>
      </div>
      <img src="img/a2.jpg" alt="After">
    </div>
  </div>
  <div class="handle"></div>
</section>

The main CSS/CSS3 styles

#wrapper {
  position: relative;
  width: 100%;
  min-height: 55vw;
  overflow: hidden;
}
.layer {
  position: absolute;
  width: 100vw;
  min-height: 55vw;
  overflow: hidden;
}
.layer .content-wrap {
  position: absolute;
  width: 100vw;
  min-height: 55vw;
}
.layer .content-body {
  color: #fff;
  width: 25%;
  position: absolute;
  top: 50%;
  text-align: center;
  transform: translateY(-50%);
}
.layer img {
  position: absolute;
  width: 35%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.layer h1 { font-size: 2em; }
.bottom {
  background: #222;
  z-index: 1;
}
.bottom .content-body { right: 5%; }
.bottom h1 { color: #FDAB00; }
.top {
  background: #EEE;
  color: #222;
  z-index: 2;
  width: 50vw;
}
.top .content-body {
  left: 5%;
  color: #222;
}

The CSS for the skewed slider handle.

.handle {
  position: absolute;
  height: 100%;
  display: block;
  background-color: #FDAB00;
  width: 5px;
  top: 0;
  left: 50%;
  z-index: 3;
}
.skewed .handle {
  top: 50%;
  transform: rotate(30deg) translateY(-50%);
  height: 200%;
  transform-origin: top;
}
.skewed .top {
  transform: skew(-30deg);
  margin-left: -1000px;
  width: calc(50vw + 1000px);
}
.skewed .top .content-wrap {
  transform: skew(30deg);
  margin-left: 1000px;
}