Image filter

by Kevin Pliester

HTML

<div class="container">

  <div class="image-slider">
    <div class="image-1"></div>
    <div class="image-2"></div>
    <input type="range" min="1" max="100" value="50" class="slider">
  </div>

</div>

SCSS

.container {
  position: relative;
  max-width: 600px;
  margin: 5% auto;
}

.image-slider {
  position: relative;
  width: 100%;
  height: 400px;
  display: block;
  background: red;
  .image-1 {
    overflow: hidden;
    position: absolute;
    z-index: 1;
    height: 100%;
    width: 100%;
    background-image: url('http://lenawenz.de/wp-content/uploads/2018/03/182803-homepagefotos-013_preview.jpeg');
    background-size: auto; 
    background-attachment: fixed;
    background-repeat: no-repeat;   
    background-position: center;
  }
  .image-2 {
    overflow: hidden;
    position: absolute;
    z-index: 2;
    height: 100%;
    width: 0%;
    background-image: url('http://lenawenz.de/wp-content/uploads/2018/03/182803-homepagefotos-013_preview.jpeg');
    background-size: auto; 
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-position: center;
    -webkit-filter: grayscale(100%);
    filter: gray;
    &:after {
      content: '';
      position: absolute;
      height: 100%;
      border: 1px solid rgba(0, 0, 0, .5);
      right: 1px;
      top: 0;
    }
  }
  .slider {
    position: absolute;
    z-index: 3;
    top: 50%;
    left: calc( 50% + 1px );
    transform: translate(-50%, -50%);
    max-width: 900px;
  }
}

.slidecontainer {
  width: 100%;
}

.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 100%;
  background: transparent;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
}

.slider:hover {
  opacity: 1;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 50px;
  background: white;
  cursor: pointer;
  border-radius: 3px;
}

.slider::-moz-range-thumb {
  width: 10px;
  height: 50px;
  background: white;
  border: 2px solid rgba(0, 0, 0, .05);
  cursor: pointer;
  border-radius: 5px;
}

JavaScript

(function($) {

  $('.image-2').css({
    'width': $('.slider').val() + '%'
  });

  $('.slider').on('change input', function() {

    $('.image-2').css({
      'width': $(this).val() + '%'
    });

  });

})(jQuery)