https://www.revoluz100.cl/js/jquery.mousewheel.js

1(function(factory){if(typeof define==='function'&&define.amd){define(['jquery'],factory);}else if(typeof exports==='object'){module.exports=factory;}else{factory(jQuery);}}(function($){var toFix=['wheel','mousewheel','DOMMouseScroll','MozMousePixelScroll'],toBind=('onwheel'in document||document.documentMode>=9)?['wheel']:['mousewheel','DomMouseScroll','MozMousePixelScroll'],slice=Array.prototype.slice,nullLowestDeltaTimeout,lowestDelta;if($.event.fixHooks){for(var i=toFix.length;i;){$.event.fixHooks[toFix[--i]]=$.event.mouseHooks;}}
2var special=$.event.special.mousewheel={version:'3.1.12',setup:function(){if(this.addEventListener){for(var i=toBind.length;i;){this.addEventListener(toBind[--i],handler,false);}}else{this.onmousewheel=handler;}
3$.data(this,'mousewheel-line-height',special.getLineHeight(this));$.data(this,'mousewheel-page-height',special.getPageHeight(this));},teardown:function(){if(this.removeEventListener){for(var i=toBind.length;i;){this.removeEventListener(toBind[--i],handler,false);}}else{this.onmousewheel=null;}
4$.removeData(this,'mousewheel-line-height');$.removeData(this,'mousewheel-page-height');},getLineHeight:function(elem){var $elem=$(elem),$parent=$elem['offsetParent'in $.fn?'offsetParent':'parent']();if(!$parent.length){$parent=$('body');}
5return parseInt($parent.css('fontSize'),10)||parseInt($elem.css('fontSize'),10)||16;},getPageHeight:function(elem){return $(elem).height();},settings:{adjustOldDeltas:true,normalizeOffset:true}};$.fn.extend({mousewheel:function(fn){return fn?this.bind('mousewheel',fn):this.trigger('mousewheel');},unmousewheel:function(fn){return this.unbind('mousewheel',fn);}});function handler(event){var orgEvent=event||window.event,args=slice.call(arguments,1),delta=0,deltaX=0,deltaY=0,absDelta=0,offsetX=0,offsetY=0;event=$.event.fix(orgEvent);event.type='mousewheel';if('detail'in orgEvent){deltaY=orgEvent.detail*-1;}
6if('wheelDelta'in orgEvent){deltaY=orgEvent.wheelDelta;}
7if('wheelDeltaY'in orgEvent){deltaY=orgEvent.wheelDeltaY;}
8if('wheelDeltaX'in orgEvent){deltaX=orgEvent.wheelDeltaX*-1;}
9if('axis'in orgEvent&&orgEvent.axis===orgEvent.HORIZONTAL_AXIS){deltaX=deltaY*-1;deltaY=0;}
10delta=deltaY===0?deltaX:deltaY;if('deltaY'in orgEvent){deltaY=orgEvent.deltaY*-1;delta=deltaY;}
11if('deltaX'in orgEvent){deltaX=orgEvent.deltaX;if(deltaY===0){delta=deltaX*-1;}}
12if(deltaY===0&&deltaX===0){return;}
13if(orgEvent.deltaMode===1){var lineHeight=$.data(this,'mousewheel-line-height');delta*=lineHeight;deltaY*=lineHeight;deltaX*=lineHeight;}else if(orgEvent.deltaMode===2){var pageHeight=$.data(this,'mousewheel-page-height');delta*=pageHeight;deltaY*=pageHeight;deltaX*=pageHeight;}
14absDelta=Math.max(Math.abs(deltaY),Math.abs(deltaX));if(!lowestDelta||absDelta<lowestDelta){lowestDelta=absDelta;if(shouldAdjustOldDeltas(orgEvent,absDelta)){lowestDelta/=40;}}
15if(shouldAdjustOldDeltas(orgEvent,absDelta)){delta/=40;deltaX/=40;deltaY/=40;}
16delta=Math[delta>=1?'floor':'ceil'](delta/lowestDelta);deltaX=Math[deltaX>=1?'floor':'ceil'](deltaX/lowestDelta);deltaY=Math[deltaY>=1?'floor':'ceil'](deltaY/lowestDelta);if(special.settings.normalizeOffset&&this.getBoundingClientRect){var boundingRect=this.getBoundingClientRect();offsetX=event.clientX-boundingRect.left;offsetY=event.clientY-boundingRect.top;}
17if(lowestDelta>10){lowestDelta=100;}
18event.deltaX=deltaX;event.deltaY=deltaY;event.deltaFactor=lowestDelta;event.offsetX=offsetX;event.offsetY=offsetY;event.deltaMode=0;args.unshift(event,delta,deltaX,deltaY);if(nullLowestDeltaTimeout){clearTimeout(nullLowestDeltaTimeout);}
19nullLowestDeltaTimeout=setTimeout(nullLowestDelta,200);return($.event.dispatch||$.event.handle).apply(this,args);}
20function nullLowestDelta(){lowestDelta=null;}
21function shouldAdjustOldDeltas(orgEvent,absDelta){return special.settings.adjustOldDeltas&&orgEvent.type==='mousewheel'&&absDelta%120===0;}}));;