code: function _factoryDomInit() {
  
                  // Add class to sliding elements
                  slidingElements.forEach( function( item ) {
                      addClass( item, slidingElementsClass );
                  });
  
                  // DOM Fallbacks when CSS transform 3d not available
                  if ( !has3d ) {
                      // No CSS 3d Transform fallback
                      addClass( document.documentElement, 'no-csstransforms3d' ); //Adds Modernizr-like class to HTML element when CSS 3D Transforms not available
                  }
  
                  // Add init class to body
                  addClass( body, initClass );
              }
docs: Offside singleton-factory Dom initialization It's called just once on Offside singleton-factory init.