Slick Slider for Mobile Only

slickSliderMobileOnly.js

var slickSliderActive = false;
function checkSlider(){    
  if( $(window).width() < 768 - getScroll() ) {
    if(slickSliderActive == false) {
      $('#video-wrap').slick({
        dots: false,
        slidesToShow: 1,
        slidesToScroll: 1
      });
      slickSliderActive = true;
    }
  } 

  else {
    if(slickSliderActive == true) {
      $('#video-wrap').slick('unslick');
      slickSliderActive = false;
    }
  }
};
checkSlider();

$(window).on('resize', function(){
   checkSlider();
});

function getScroll(){
  var div = document.createElement('div');
  div.style.overflowY = 'scroll';
  div.style.width = '50px';
  div.style.height = '50px';
  div.style.visibility = 'hidden';
  document.body.appendChild(div);
  var scrollWidth = div.offsetWidth - div.clientWidth;
  document.body.removeChild(div);
  return scrollWidth;
}