zscroll.min.js

!function(){var Z={};Z.scroll={registerScrollEvents:function(){window.onscroll=this.getOnscrollClosure()},getOnscrollClosure:function(){var self=this;var lastPositionY=0;var lastPositionX=0;return function(){var currentPositionY=window.pageYOffset||document.documentElement.scrollTop;var currentPositionX=window.pageXOffset||document.documentElement.scrollLeft;if(currentPositionY<lastPositionY){self.fireEvent("zscroll",{direction:"up"})}if(currentPositionY>lastPositionY){self.fireEvent("zscroll",{direction:"down"})}if(currentPositionX<lastPositionX){self.fireEvent("zscroll",{direction:"left"})}if(currentPositionX>lastPositionX){self.fireEvent("zscroll",{direction:"right"})}lastPositionY=currentPositionY;lastPositionX=currentPositionX}},fireEvent:function(name,data){var event=new CustomEvent(name,{detail:data});document.dispatchEvent(event)}};Z.scroll.registerScrollEvents()}();