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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
                <div class="SideScroller">
    <div class="SideScroller__wrap">
      <div class="SideScroller__foreground"></div>
      <div class="SideScroller__mask">
        <div class="SideScroller__line">
          <div class="SideScroller__handle">
            <svg role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path fill="currentColor" d="M377.941 169.941V216H134.059v-46.059c0-21.382-25.851-32.09-40.971-16.971L7.029 239.029c-9.373 9.373-9.373 24.568 0 33.941l86.059 86.059c15.119 15.119 40.971 4.411 40.971-16.971V296h243.882v46.059c0 21.382 25.851 32.09 40.971 16.971l86.059-86.059c9.373-9.373 9.373-24.568 0-33.941l-86.059-86.059c-15.119-15.12-40.971-4.412-40.971 16.97z"></path></svg>
          </div>
        </div>
      </div>
    </div>
  </div>

            
          
!
            
              $c-handle: #FFFFFF
$c-bg: #afb69e

=square($n)
  height: $n
  width: $n

=circle($n)
  +square($n)
  border-radius: 50%

=center
  position: absolute
  top: 50%
  left: 50%
  transform: translate(-50%, -50%)

=cover
  position: absolute
  top: 0
  left: 0
  bottom: 0
  right: 0

body
  background: $c-bg
  margin: 0

// - - - -

.SideScroller
  padding: 1rem
  max-width: 900px
  margin: 0 auto
  height: 15rem

  @media (min-width: 576px)
    height: 20rem

  @media (min-width: 768px)
    height: 30rem

  &__wrap
    height: 100%
    position: relative
    background: url(https://garethweaver.com/codepen/images/shark-1.jpg) no-repeat center center
    background-size: cover

  &__foreground
    +cover
    background: url(https://garethweaver.com/codepen/images/shark-2.jpg) no-repeat center center
    background-size: cover

  &__mask
    height: 100%
    position: relative

  &__line
    height: 100%
    width: 2px
    background: $c-handle
    position: absolute
    top: 0
    right: 0
    bottom: 0

  &__handle
    +circle(2rem)
    +center
    background: $c-handle
    position: absolute
    padding: 10%

    svg
      +square(1.5rem)
      +center

            
          
!
            
              class SideScroller {
  constructor(selector) {
    this.elmClassName = selector.split('.').pop()
    this.wrap = document.getElementsByClassName(`${this.elmClassName}__wrap`)[0]
    this.handle = document.getElementsByClassName(`${this.elmClassName}__handle`)[0]
    this.mask = document.getElementsByClassName(`${this.elmClassName}__mask`)[0]
    this.fg = document.getElementsByClassName(`${this.elmClassName}__foreground`)[0]
    this.pos = 50
    this.create()
  }

  create() {
    this.handle.addEventListener('mousedown', this.drag)
    this.handle.addEventListener('touchstart', this.drag)
    window.addEventListener('resize', this.resizeHandler)
    this.setPosition()
  }

  drag = e => {
    e.preventDefault()
    document.addEventListener('mousemove', this.dragHandler)
    document.addEventListener('touchmove', this.dragHandler)
    document.addEventListener('mouseup', this.stopDragHandler)
    document.addEventListener('touchend', this.stopDragHandler)
  }

  resizeHandler = e => {
    this.setPosition()
  }

  dragHandler = e => {
    let percent = this.getPercent(e, this.wrap)
    if (percent < 0) {
      percent = 0
    } else if (percent > 100) {
      percent = 100
    }
    this.setPosition(percent)
  }

  stopDragHandler = e => {
    document.removeEventListener('mousemove', this.dragHandler)
    document.removeEventListener('mouseup', this.stopDragHandler)
  }

  getPercent(evt, elm) {
    let ref = evt.touches
      ? evt.touches[0].pageX
      : evt.pageX
    let rect = elm.getBoundingClientRect()
    return ((ref - rect.left) / rect.width) * 100
  }

  setPosition(percent = this.pos) {
    this.pos = percent
    this.mask.style.width = percent + '%'
    const clip = `inset(0 0 0 ${this.wrap.offsetWidth * percent / 100}px)`
    this.fg.style.clipPath = clip
    this.fg.style.webkitClipPath = clip
  }
}

new SideScroller('.SideScroller')

            
          
!
999px
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