Detail Slick Slideshow

/*Downloaded from https://www.codeseek.co/supah/detail-slick-slideshow-mWKxJL */
body,
html {
  height: 100%;
  background: #110101;
  font-family: 'Roboto', sans-serif;
  overflow: hidden;
}

.slideshow {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}
.slideshow .slider {
  width: 100vw;
  height: 100vw;
  z-index: 2;
}
.slideshow .slider * {
  outline: none;
}
.slideshow .slider .item {
  height: 100vh;
  width: 100vw;
  position: relative;
  overflow: hidden;
  border: none;
}
.slideshow .slider .item .text {
  display: none;
}
.slideshow .slider .item img {
  min-width: 100%;
  min-height: 100%;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
}
.slideshow .slick-dots {
  position: fixed;
  z-index: 100;
  width: 40px;
  height: auto;
  bottom: auto;
  top: 50%;
  right: 0;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
  left: auto;
  color: #fff;
  display: block;
}
.slideshow .slick-dots li {
  display: block;
  width: 100%;
  height: auto;
}
.slideshow .slick-dots li button {
  position: relative;
  width: 20px;
  height: 15px;
  text-align: center;
}
.slideshow .slick-dots li button:before {
  content: '';
  background: #fff;
  color: #fff;
  height: 2px;
  width: 20px;
  border-radius: 0;
  position: absolute;
  top: 50%;
  right: 0;
  left: auto;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
  transition: all .3s ease-in-out;
  opacity: 0.6;
}
.slideshow .slick-dots li.slick-active button:before {
  width: 40px;
  opacity: 1;
}
.slideshow.slideshow-right {
  left: auto;
  right: 50%;
  z-index: 1;
  width: 30vw;
  pointer-events: none;
  box-shadow: 0 30px 30px -10px rgba(0, 0, 0, 0.3), 0 50px 50px -30px rgba(0, 0, 0, 0.3), 0 0 0 5px rgba(255, 255, 255, 0.09);
  height: 30vh;
  top: 50%;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
}
.slideshow.slideshow-right .slider {
  width: 100%;
  left: 0;
  position: absolute;
}

.slideshow-text {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  z-index: 100;
  font-size: 80px;
  width: 100vw;
  text-align: center;
  color: #fff;
  font-family: 'Roboto Condensed', sans-serif;
  font-weight: 100;
  pointer-events: none;
  text-transform: uppercase;
  letter-spacing: 20px;
  line-height: 0.8;
}
@media (max-width: 767px) {
  .slideshow-text {
    font-size: 40px;
  }
}

/*Downloaded from https://www.codeseek.co/supah/detail-slick-slideshow-mWKxJL */
var $slider = $('.slideshow .slider'),
  maxItems = $('.item', $slider).length;

$sliderRight = $('.slideshow').clone().addClass('slideshow-right').appendTo($('.split-slideshow'));

rightItems = $('.item', $sliderRight).toArray();
reverseItems = rightItems.reverse();
$('.slider', $sliderRight).html('');
for (i = 0; i < maxItems; i++) {
  $(reverseItems[i]).appendTo($('.slider', $sliderRight));
}

$slider.addClass('slideshow-left');
$('.slideshow-left').slick({
  vertical: true,
  verticalSwiping: true,
  arrows: false,
  infinite: true,
  dots: true,
  speed: 1000,
  cssEase: 'cubic-bezier(0.7, 0, 0.3, 1)'
}).on('beforeChange', function(event, slick, currentSlide, nextSlide) {

  if (currentSlide > nextSlide && nextSlide == 0 && currentSlide == maxItems - 1) {
    $('.slideshow-right .slider').slick('slickGoTo', -1);
    $('.slideshow-text').slick('slickGoTo', maxItems);
  } else if (currentSlide < nextSlide && currentSlide == 0 && nextSlide == maxItems - 1 ) {
    $('.slideshow-right .slider').slick('slickGoTo', maxItems);
    $('.slideshow-text').slick('slickGoTo', -1);
  } else {
    $('.slideshow-right .slider').slick('slickGoTo', maxItems - 1 - nextSlide);
    $('.slideshow-text').slick('slickGoTo', nextSlide);
  }
}).on("mousewheel", function(event) {
  event.preventDefault();
  if (event.deltaX > 0 || event.deltaY < 0) {
    $(this).slick('slickNext');
  } else if (event.deltaX < 0 || event.deltaY > 0) {
    $(this).slick('slickPrev');
  };
});

$('.slideshow-right .slider').slick({
  swipe: false,
  arrows: false,
  infinite: true,
  speed: 950,
  cssEase: 'cubic-bezier(0.7, 0, 0.3, 1)',
  initialSlide: maxItems - 1  
});
$('.slideshow-text').slick({
  swipe: false,
  vertical: true,
  arrows: false,
  infinite: true,
  speed: 900,
  cssEase: 'cubic-bezier(0.7, 0, 0.3, 1)'
});