code: function showScrollbar() {
          $dragHandleEl.addClass('visible');
  
          if (!options.autoHide) {
            return;
          }
          if(typeof flashTimeout === 'number') {
            window.clearTimeout(flashTimeout);
          }
          flashTimeout = window.setTimeout(function() {
              hideScrollbar();
          }, 1000);
      }
docs: Show scrollbar