/*!
 * skrollr core
 *
 * Alexander Prinzhorn - https://github.com/Prinzhorn/skrollr
 *
 * Free to use under terms of MIT license
 */
(function(window,document,undefined){'use strict';var skrollr=window.skrollr={get:function(){return _instance},init:function(options){return _instance||new Skrollr(options)},VERSION:'0.6.10'};var hasProp=Object.prototype.hasOwnProperty;var Math=window.Math;var getStyle=window.getComputedStyle;var documentElement;var body;var EVENT_TOUCHSTART='touchstart';var EVENT_TOUCHMOVE='touchmove';var EVENT_TOUCHCANCEL='touchcancel';var EVENT_TOUCHEND='touchend';var SKROLLABLE_CLASS='skrollable';var SKROLLABLE_BEFORE_CLASS=SKROLLABLE_CLASS+'-before';var SKROLLABLE_BETWEEN_CLASS=SKROLLABLE_CLASS+'-between';var SKROLLABLE_AFTER_CLASS=SKROLLABLE_CLASS+'-after';var SKROLLR_CLASS='skrollr';var NO_SKROLLR_CLASS='no-'+SKROLLR_CLASS;var SKROLLR_DESKTOP_CLASS=SKROLLR_CLASS+'-desktop';var SKROLLR_MOBILE_CLASS=SKROLLR_CLASS+'-mobile';var DEFAULT_EASING='linear';var DEFAULT_DURATION=1000;var MOBILE_DECELERATION=0.0006;var DEFAULT_SMOOTH_SCROLLING_DURATION=200;var ANCHOR_START='start';var ANCHOR_END='end';var ANCHOR_CENTER='center';var ANCHOR_BOTTOM='bottom';var SKROLLABLE_ID_DOM_PROPERTY='___skrollable_id';var rxTrim=/^\s+|\s+$/g;var rxKeyframeAttribute=/^data(?:-(_\w+))?(?:-?(-?\d+))?(?:-?(start|end|top|center|bottom))?(?:-?(top|center|bottom))?$/;var rxPropValue=/\s*([\w\-\[\]]+)\s*:\s*(.+?)\s*(?:;|$)/gi;var rxPropEasing=/^([a-z\-]+)\[(\w+)\]$/;var rxCamelCase=/-([a-z])/g;var rxCamelCaseFn=function(str,letter){return letter.toUpperCase()};var rxNumericValue=/[\-+]?[\d]*\.?[\d]+/g;var rxInterpolateString=/\{\?\}/g;var rxRGBAIntegerColor=/rgba?\(\s*-?\d+\s*,\s*-?\d+\s*,\s*-?\d+/g;var rxGradient=/[a-z\-]+-gradient/g;var theCSSPrefix='';var theDashedCSSPrefix='';var detectCSSPrefix=function(){var rxPrefixes=/^(?:O|Moz|webkit|ms)|(?:-(?:o|moz|webkit|ms)-)/;if(!getStyle){return}
var style=getStyle(body,null);for(var k in style){theCSSPrefix=(k.match(rxPrefixes)||(+k==k&&style[k].match(rxPrefixes)));if(theCSSPrefix){break}}
if(!theCSSPrefix){theCSSPrefix=theDashedCSSPrefix='';return}
theCSSPrefix=theCSSPrefix[0];if(theCSSPrefix.slice(0,1)==='-'){theDashedCSSPrefix=theCSSPrefix;theCSSPrefix=({'-webkit-':'webkit','-moz-':'Moz','-ms-':'ms','-o-':'O'})[theCSSPrefix]}else{theDashedCSSPrefix='-'+theCSSPrefix.toLowerCase()+'-'}};var polyfillRAF=function(){var requestAnimFrame=window.requestAnimationFrame||window[theCSSPrefix.toLowerCase()+'RequestAnimationFrame'];var lastTime=_now();if(_isMobile||!requestAnimFrame){requestAnimFrame=function(callback){var deltaTime=_now()-lastTime;var delay=Math.max(0,1000/60-deltaTime);window.setTimeout(function(){lastTime=_now();callback()},delay)}}
return requestAnimFrame};var easings={begin:function(){return 0},end:function(){return 1},linear:function(p){return p},quadratic:function(p){return p*p},cubic:function(p){return p*p*p},swing:function(p){return(-Math.cos(p*Math.PI)/2)+0.5},sqrt:function(p){return Math.sqrt(p)},outCubic:function(p){return(Math.pow((p-1),3)+1)},bounce:function(p){var a;if(p<=0.5083){a=3}else if(p<=0.8489){a=9}else if(p<=0.96208){a=27}else if(p<=0.99981){a=91}else{return 1}
return 1-Math.abs(3*Math.cos(p*a*1.028)/a)}};function Skrollr(options){documentElement=document.documentElement;body=document.body;detectCSSPrefix();_instance=this;options=options||{};_constants=options.constants||{};if(options.easing){for(var e in options.easing){easings[e]=options.easing[e]}}
_edgeStrategy=options.edgeStrategy||'set';_listeners={beforerender:options.beforerender,render:options.render};_forceHeight=options.forceHeight!==!1;if(_forceHeight){_scale=options.scale||1}
_smoothScrollingEnabled=options.smoothScrolling!==!1;_smoothScrollingDuration=options.smoothScrollingDuration||DEFAULT_SMOOTH_SCROLLING_DURATION;_smoothScrolling={targetTop:_instance.getScrollTop()};_isMobile=((options.mobileCheck||function(){return(/Android|iPhone|iPad|iPod|BlackBerry|Windows Phone/i).test(navigator.userAgent||navigator.vendor||window.opera)})());if(_isMobile){_skrollrBody=document.getElementById('skrollr-body');if(_skrollrBody){_detect3DTransforms()}
_initMobile();_updateClass(documentElement,[SKROLLR_CLASS,SKROLLR_MOBILE_CLASS],[NO_SKROLLR_CLASS])}else{_updateClass(documentElement,[SKROLLR_CLASS,SKROLLR_DESKTOP_CLASS],[NO_SKROLLR_CLASS])}
_instance.refresh();_addEvent(window,'resize orientationchange',function(){var width=documentElement.clientWidth;var height=documentElement.clientHeight;if(height!==_lastViewportHeight||width!==_lastViewportWidth){_lastViewportHeight=height;_lastViewportWidth=width;_requestReflow=!0}});var requestAnimFrame=polyfillRAF();(function animloop(){_render();requestAnimFrame(animloop)}());return _instance}
Skrollr.prototype.refresh=function(elements){var elementIndex;var elementsLength;var ignoreID=!1;if(elements===undefined){ignoreID=!0;_skrollables=[];_skrollableIdCounter=0;elements=document.getElementsByTagName('*')}else{elements=[].concat(elements)}
elementIndex=0;elementsLength=elements.length;for(;elementIndex<elementsLength;elementIndex++){var el=elements[elementIndex];var anchorTarget=el;var keyFrames=[];var smoothScrollThis=_smoothScrollingEnabled;var edgeStrategy=_edgeStrategy;if(!el.attributes){continue}
var attributeIndex=0;var attributesLength=el.attributes.length;for(;attributeIndex<attributesLength;attributeIndex++){var attr=el.attributes[attributeIndex];if(attr.name==='data-anchor-target'){anchorTarget=document.querySelector(attr.value);if(anchorTarget===null){throw 'Unable to find anchor target "'+attr.value+'"'}
continue}
if(attr.name==='data-smooth-scrolling'){smoothScrollThis=attr.value!=='off';continue}
if(attr.name==='data-edge-strategy'){edgeStrategy=attr.value;continue}
var match=attr.name.match(rxKeyframeAttribute);if(match===null){continue}
var constant=match[1];constant=constant&&_constants[constant.substr(1)]||0;var offset=(match[2]|0)+constant;var anchor1=match[3];var anchor2=match[4]||anchor1;var kf={offset:offset,props:attr.value,element:el};keyFrames.push(kf);if(!anchor1||anchor1===ANCHOR_START||anchor1===ANCHOR_END){kf.mode='absolute';if(anchor1===ANCHOR_END){kf.isEnd=!0}else{kf.frame=offset*_scale;delete kf.offset}}else{kf.mode='relative';kf.anchors=[anchor1,anchor2]}}
if(!keyFrames.length){continue}
var styleAttr,classAttr;var id;if(!ignoreID&&SKROLLABLE_ID_DOM_PROPERTY in el){id=el[SKROLLABLE_ID_DOM_PROPERTY];styleAttr=_skrollables[id].styleAttr;classAttr=_skrollables[id].classAttr}else{id=(el[SKROLLABLE_ID_DOM_PROPERTY]=_skrollableIdCounter++);styleAttr=el.style.cssText;classAttr=_getClass(el)}
_skrollables[id]={element:el,styleAttr:styleAttr,classAttr:classAttr,anchorTarget:anchorTarget,keyFrames:keyFrames,smoothScrolling:smoothScrollThis,edgeStrategy:edgeStrategy};_updateClass(el,[SKROLLABLE_CLASS],[])}
_reflow();elementIndex=0;elementsLength=elements.length;for(;elementIndex<elementsLength;elementIndex++){var sk=_skrollables[elements[elementIndex][SKROLLABLE_ID_DOM_PROPERTY]];if(sk===undefined){continue}
_parseProps(sk);_fillProps(sk)}
return _instance};Skrollr.prototype.relativeToAbsolute=function(element,viewportAnchor,elementAnchor){var viewportHeight=documentElement.clientHeight;var box=element.getBoundingClientRect();var absolute=box.top;var boxHeight=box.bottom-box.top;if(viewportAnchor===ANCHOR_BOTTOM){absolute-=viewportHeight}else if(viewportAnchor===ANCHOR_CENTER){absolute-=viewportHeight/2}
if(elementAnchor===ANCHOR_BOTTOM){absolute+=boxHeight}else if(elementAnchor===ANCHOR_CENTER){absolute+=boxHeight/2}
absolute+=_instance.getScrollTop();return(absolute+0.5)|0};Skrollr.prototype.animateTo=function(top,options){options=options||{};var now=_now();var scrollTop=_instance.getScrollTop();_scrollAnimation={startTop:scrollTop,topDiff:top-scrollTop,targetTop:top,duration:options.duration||DEFAULT_DURATION,startTime:now,endTime:now+(options.duration||DEFAULT_DURATION),easing:easings[options.easing||DEFAULT_EASING],done:options.done};if(!_scrollAnimation.topDiff){if(_scrollAnimation.done){_scrollAnimation.done.call(_instance,!1)}
_scrollAnimation=undefined}
return _instance};Skrollr.prototype.stopAnimateTo=function(){if(_scrollAnimation&&_scrollAnimation.done){_scrollAnimation.done.call(_instance,!0)}
_scrollAnimation=undefined};Skrollr.prototype.isAnimatingTo=function(){return!!_scrollAnimation};Skrollr.prototype.setScrollTop=function(top,force){if(force===!0){_lastTop=top;_forceRender=!0}
if(_isMobile){_mobileOffset=Math.min(Math.max(top,0),_maxKeyFrame)}else{window.scrollTo(0,top)}
return _instance};Skrollr.prototype.getScrollTop=function(){if(_isMobile){return _mobileOffset}else{return window.pageYOffset||documentElement.scrollTop||body.scrollTop||0}};Skrollr.prototype.on=function(name,fn){_listeners[name]=fn;return _instance};Skrollr.prototype.off=function(name){delete _listeners[name];return _instance};var _initMobile=function(){var initialElement;var initialTouchY;var initialTouchX;var currentTouchY;var currentTouchX;var lastTouchY;var deltaY;var initialTouchTime;var currentTouchTime;var lastTouchTime;var deltaTime;_addEvent(documentElement,[EVENT_TOUCHSTART,EVENT_TOUCHMOVE,EVENT_TOUCHCANCEL,EVENT_TOUCHEND].join(' '),function(e){e.preventDefault();var touch=e.changedTouches[0];currentTouchY=touch.clientY;currentTouchX=touch.clientX;currentTouchTime=e.timeStamp;switch(e.type){case EVENT_TOUCHSTART:if(initialElement){initialElement.blur()}
_instance.stopAnimateTo();initialElement=e.target;initialTouchY=lastTouchY=currentTouchY;initialTouchX=currentTouchX;initialTouchTime=currentTouchTime;break;case EVENT_TOUCHMOVE:deltaY=currentTouchY-lastTouchY;deltaTime=currentTouchTime-lastTouchTime;_instance.setScrollTop(_mobileOffset-deltaY,!0);lastTouchY=currentTouchY;lastTouchTime=currentTouchTime;break;default:case EVENT_TOUCHCANCEL:case EVENT_TOUCHEND:var distanceY=initialTouchY-currentTouchY;var distanceX=initialTouchX-currentTouchX;var distance2=distanceX*distanceX+distanceY*distanceY;if(distance2<49){initialElement.focus();initialElement.click();return}
initialElement=undefined;var speed=deltaY/deltaTime;speed=Math.max(Math.min(speed,3),-3);var duration=Math.abs(speed/MOBILE_DECELERATION);var targetOffset=speed*duration+0.5*MOBILE_DECELERATION*duration*duration;var targetTop=_instance.getScrollTop()-targetOffset;var targetRatio=0;if(targetTop>_maxKeyFrame){targetRatio=(_maxKeyFrame-targetTop)/targetOffset;targetTop=_maxKeyFrame}else if(targetTop<0){targetRatio=-targetTop/targetOffset;targetTop=0}
duration=duration*(1-targetRatio);_instance.animateTo(targetTop,{easing:'outCubic',duration:duration});break}});window.scrollTo(0,0);documentElement.style.overflow=body.style.overflow='hidden'};var _updateDependentKeyFrames=function(){var skrollable;var element;var anchorTarget;var keyFrames;var keyFrameIndex;var keyFramesLength;var kf;var skrollableIndex;var skrollablesLength;skrollableIndex=0;skrollablesLength=_skrollables.length;for(;skrollableIndex<skrollablesLength;skrollableIndex++){skrollable=_skrollables[skrollableIndex];element=skrollable.element;anchorTarget=skrollable.anchorTarget;keyFrames=skrollable.keyFrames;keyFrameIndex=0;keyFramesLength=keyFrames.length;for(;keyFrameIndex<keyFramesLength;keyFrameIndex++){kf=keyFrames[keyFrameIndex];if(kf.mode==='relative'){_reset(element);kf.frame=_instance.relativeToAbsolute(anchorTarget,kf.anchors[0],kf.anchors[1])-kf.offset;_reset(element,!0)}
if(_forceHeight){if(!kf.isEnd&&kf.frame>_maxKeyFrame){_maxKeyFrame=kf.frame}}}}
_maxKeyFrame=Math.max(_maxKeyFrame,_getDocumentHeight());skrollableIndex=0;skrollablesLength=_skrollables.length;for(;skrollableIndex<skrollablesLength;skrollableIndex++){skrollable=_skrollables[skrollableIndex];keyFrames=skrollable.keyFrames;keyFrameIndex=0;keyFramesLength=keyFrames.length;for(;keyFrameIndex<keyFramesLength;keyFrameIndex++){kf=keyFrames[keyFrameIndex];if(kf.isEnd){kf.frame=_maxKeyFrame-kf.offset}}
skrollable.keyFrames.sort(_keyFrameComparator)}};var _calcSteps=function(fakeFrame,actualFrame){var skrollableIndex=0;var skrollablesLength=_skrollables.length;for(;skrollableIndex<skrollablesLength;skrollableIndex++){var skrollable=_skrollables[skrollableIndex];var element=skrollable.element;var frame=skrollable.smoothScrolling?fakeFrame:actualFrame;var frames=skrollable.keyFrames;var firstFrame=frames[0].frame;var lastFrame=frames[frames.length-1].frame;var beforeFirst=frame<firstFrame;var afterLast=frame>lastFrame;var firstOrLastFrame=frames[beforeFirst?0:frames.length-1];var key;var value;if(beforeFirst||afterLast){if(beforeFirst&&skrollable.edge===-1||afterLast&&skrollable.edge===1){continue}
_updateClass(element,[beforeFirst?SKROLLABLE_BEFORE_CLASS:SKROLLABLE_AFTER_CLASS],[SKROLLABLE_BEFORE_CLASS,SKROLLABLE_BETWEEN_CLASS,SKROLLABLE_AFTER_CLASS]);skrollable.edge=beforeFirst?-1:1;switch(skrollable.edgeStrategy){case 'reset':_reset(element);continue;case 'ease':frame=firstOrLastFrame.frame;break;default:case 'set':var props=firstOrLastFrame.props;for(key in props){if(hasProp.call(props,key)){value=_interpolateString(props[key].value);skrollr.setStyle(element,key,value)}}
continue}}else{if(skrollable.edge!==0){_updateClass(element,[SKROLLABLE_CLASS,SKROLLABLE_BETWEEN_CLASS],[SKROLLABLE_BEFORE_CLASS,SKROLLABLE_AFTER_CLASS]);skrollable.edge=0}}
var keyFrameIndex=0;var framesLength=frames.length-1;for(;keyFrameIndex<framesLength;keyFrameIndex++){if(frame>=frames[keyFrameIndex].frame&&frame<=frames[keyFrameIndex+1].frame){var left=frames[keyFrameIndex];var right=frames[keyFrameIndex+1];for(key in left.props){if(hasProp.call(left.props,key)){var progress=(frame-left.frame)/(right.frame-left.frame);progress=left.props[key].easing(progress);value=_calcInterpolation(left.props[key].value,right.props[key].value,progress);value=_interpolateString(value);skrollr.setStyle(element,key,value)}}
break}}}};var _render=function(){if(_requestReflow){_requestReflow=!1;_reflow()}
var renderTop=_instance.getScrollTop();var afterAnimationCallback;var now=_now();var progress;if(_scrollAnimation){if(now>=_scrollAnimation.endTime){renderTop=_scrollAnimation.targetTop;afterAnimationCallback=_scrollAnimation.done;_scrollAnimation=undefined}else{progress=_scrollAnimation.easing((now-_scrollAnimation.startTime)/_scrollAnimation.duration);renderTop=(_scrollAnimation.startTop+progress*_scrollAnimation.topDiff)|0}
_instance.setScrollTop(renderTop,!0)}else if(!_isMobile){var smoothScrollingDiff=_smoothScrolling.targetTop-renderTop;if(smoothScrollingDiff){_smoothScrolling={startTop:_lastTop,topDiff:renderTop-_lastTop,targetTop:renderTop,startTime:_lastRenderCall,endTime:_lastRenderCall+_smoothScrollingDuration}}
if(now<=_smoothScrolling.endTime){progress=easings.sqrt((now-_smoothScrolling.startTime)/_smoothScrollingDuration);renderTop=(_smoothScrolling.startTop+progress*_smoothScrolling.topDiff)|0}}
if(_isMobile&&_skrollrBody){skrollr.setStyle(_skrollrBody,'transform','translate(0, '+ -(_mobileOffset)+'px) '+_translateZ)}
if(_forceRender||_lastTop!==renderTop){_direction=(renderTop>=_lastTop)?'down':'up';_forceRender=!1;var listenerParams={curTop:renderTop,lastTop:_lastTop,maxTop:_maxKeyFrame,direction:_direction};var continueRendering=_listeners.beforerender&&_listeners.beforerender.call(_instance,listenerParams);if(continueRendering!==!1){_calcSteps(renderTop,_instance.getScrollTop());_lastTop=renderTop;if(_listeners.render){_listeners.render.call(_instance,listenerParams)}}
if(afterAnimationCallback){afterAnimationCallback.call(_instance,!1)}}
_lastRenderCall=now};var _parseProps=function(skrollable){var keyFrameIndex=0;var keyFramesLength=skrollable.keyFrames.length;for(;keyFrameIndex<keyFramesLength;keyFrameIndex++){var frame=skrollable.keyFrames[keyFrameIndex];var easing;var value;var prop;var props={};var match;while((match=rxPropValue.exec(frame.props))!==null){prop=match[1];value=match[2];easing=prop.match(rxPropEasing);if(easing!==null){prop=easing[1];easing=easing[2]}else{easing=DEFAULT_EASING}
value=value.indexOf('!')?_parseProp(value):[value.slice(1)];props[prop]={value:value,easing:easings[easing]}}
frame.props=props}};var _parseProp=function(val){var numbers=[];rxRGBAIntegerColor.lastIndex=0;val=val.replace(rxRGBAIntegerColor,function(rgba){return rgba.replace(rxNumericValue,function(n){return n/255*100+'%'})});if(theDashedCSSPrefix){rxGradient.lastIndex=0;val=val.replace(rxGradient,function(s){return theDashedCSSPrefix+s})}
val=val.replace(rxNumericValue,function(n){numbers.push(+n);return'{?}'});numbers.unshift(val);return numbers};var _fillProps=function(sk){var propList={};var keyFrameIndex;var keyFramesLength;keyFrameIndex=0;keyFramesLength=sk.keyFrames.length;for(;keyFrameIndex<keyFramesLength;keyFrameIndex++){_fillPropForFrame(sk.keyFrames[keyFrameIndex],propList)}
propList={};keyFrameIndex=sk.keyFrames.length-1;for(;keyFrameIndex>=0;keyFrameIndex--){_fillPropForFrame(sk.keyFrames[keyFrameIndex],propList)}};var _fillPropForFrame=function(frame,propList){var key;for(key in propList){if(!hasProp.call(frame.props,key)){frame.props[key]=propList[key]}}
for(key in frame.props){propList[key]=frame.props[key]}};var _calcInterpolation=function(val1,val2,progress){var valueIndex;var val1Length=val1.length;if(val1Length!==val2.length){throw 'Can\'t interpolate between "'+val1[0]+'" and "'+val2[0]+'"'}
var interpolated=[val1[0]];valueIndex=1;for(;valueIndex<val1Length;valueIndex++){interpolated[valueIndex]=val1[valueIndex]+((val2[valueIndex]-val1[valueIndex])*progress)}
return interpolated};var _interpolateString=function(val){var valueIndex=1;rxInterpolateString.lastIndex=0;return val[0].replace(rxInterpolateString,function(){return val[valueIndex++]})};var _reset=function(elements,undo){elements=[].concat(elements);var skrollable;var element;var elementsIndex=0;var elementsLength=elements.length;for(;elementsIndex<elementsLength;elementsIndex++){element=elements[elementsIndex];skrollable=_skrollables[element[SKROLLABLE_ID_DOM_PROPERTY]];if(!skrollable){continue}
if(undo){element.style.cssText=skrollable.dirtyStyleAttr;_updateClass(element,skrollable.dirtyClassAttr)}else{skrollable.dirtyStyleAttr=element.style.cssText;skrollable.dirtyClassAttr=_getClass(element);element.style.cssText=skrollable.styleAttr;_updateClass(element,skrollable.classAttr)}}};var _detect3DTransforms=function(){_translateZ='translateZ(0)';skrollr.setStyle(_skrollrBody,'transform',_translateZ);var computedStyle=getStyle(_skrollrBody);var computedTransform=computedStyle.getPropertyValue('transform');var computedTransformWithPrefix=computedStyle.getPropertyValue(theDashedCSSPrefix+'transform');var has3D=(computedTransform&&computedTransform!=='none')||(computedTransformWithPrefix&&computedTransformWithPrefix!=='none');if(!has3D){_translateZ=''}};skrollr.setStyle=function(el,prop,val){var style=el.style;prop=prop.replace(rxCamelCase,rxCamelCaseFn).replace('-','');if(prop==='zIndex'){style[prop]=''+(val|0)}else if(prop==='float'){style.styleFloat=style.cssFloat=val}else{try{if(theCSSPrefix){style[theCSSPrefix+prop.slice(0,1).toUpperCase()+prop.slice(1)]=val}
style[prop]=val}catch(ignore){}}};var _addEvent=skrollr.addEvent=function(element,names,callback){var intermediate=function(e){e=e||window.event;if(!e.target){e.target=e.srcElement}
if(!e.preventDefault){e.preventDefault=function(){e.returnValue=!1}}
return callback.call(this,e)};names=names.split(' ');var nameCounter=0;var namesLength=names.length;for(;nameCounter<namesLength;nameCounter++){if(element.addEventListener){element.addEventListener(names[nameCounter],callback,!1)}else{element.attachEvent('on'+names[nameCounter],intermediate)}}};var _reflow=function(){var pos=_instance.getScrollTop();_maxKeyFrame=0;if(_forceHeight&&!_isMobile){body.style.height='auto'}
_updateDependentKeyFrames();if(_forceHeight&&!_isMobile){body.style.height=(_maxKeyFrame+documentElement.clientHeight)+'px'}
if(_isMobile){_instance.setScrollTop(Math.min(_instance.getScrollTop(),_maxKeyFrame))}else{_instance.setScrollTop(pos,!0)}
_forceRender=!0};var _getDocumentHeight=function(){var skrollrBodyHeight=(_skrollrBody&&_skrollrBody.offsetHeight||0);var bodyHeight=Math.max(skrollrBodyHeight,body.scrollHeight,body.offsetHeight,documentElement.scrollHeight,documentElement.offsetHeight,documentElement.clientHeight);return bodyHeight-documentElement.clientHeight};var _getClass=function(element){var prop='className';if(window.SVGElement&&element instanceof window.SVGElement){element=element[prop];prop='baseVal'}
return element[prop]};var _updateClass=function(element,add,remove){var prop='className';if(window.SVGElement&&element instanceof window.SVGElement){element=element[prop];prop='baseVal'}
if(remove===undefined){element[prop]=add;return}
var val=element[prop];var classRemoveIndex=0;var removeLength=remove.length;for(;classRemoveIndex<removeLength;classRemoveIndex++){val=_untrim(val).replace(_untrim(remove[classRemoveIndex]),' ')}
val=_trim(val);var classAddIndex=0;var addLength=add.length;for(;classAddIndex<addLength;classAddIndex++){if(_untrim(val).indexOf(_untrim(add[classAddIndex]))===-1){val+=' '+add[classAddIndex]}}
element[prop]=_trim(val)};var _trim=function(a){return a.replace(rxTrim,'')};var _untrim=function(a){return' '+a+' '};var _now=Date.now||function(){return+new Date()};var _keyFrameComparator=function(a,b){return a.frame-b.frame};var _instance;var _skrollables;var _skrollrBody;var _listeners;var _forceHeight;var _maxKeyFrame=0;var _scale=1;var _constants;var _direction='down';var _lastTop=-1;var _lastRenderCall=_now();var _lastViewportWidth=0;var _lastViewportHeight=0;var _requestReflow=!1;var _scrollAnimation;var _smoothScrollingEnabled;var _smoothScrollingDuration;var _smoothScrolling;var _forceRender;var _skrollableIdCounter=0;var _edgeStrategy;var _isMobile=!1;var _mobileOffset=0;var _translateZ}(window,document))