/*!
* smooth-scroll v16.1.0
* Animate scrolling to anchor links
* (c) 2019 Chris Ferdinandi
* MIT License
* http://github.com/cferdinandi/smooth-scroll
*/(function(root,factory){if(typeof define==='function'&&define.amd){define([],(function(){return factory(root);}));}else if(typeof exports==='object'){module.exports=factory(root);}else{root.SmoothScroll=factory(root);}})(typeof global!=='undefined'?global:typeof window!=='undefined'?window:this,(function(window){'use strict';var defaults={ignore:'[data-scroll-ignore]',header:null,topOnEmptyHash:true,speed:500,speedAsDuration:false,durationMax:null,durationMin:null,clip:true,offset:0,easing:'easeInOutCubic',customEasing:null,updateURL:true,popstate:true,emitEvents:true};var supports=function(){return('querySelector'in document&&'addEventListener'in window&&'requestAnimationFrame'in window&&'closest'in window.Element.prototype);};var extend=function(){var merged={};Array.prototype.forEach.call(arguments,(function(obj){for(var key in obj){if(!obj.hasOwnProperty(key))return;merged[key]=obj[key];}}));return merged;};var reduceMotion=function(){if('matchMedia'in window&&window.matchMedia('(prefers-reduced-motion)').matches){return true;}
return false;};var getHeight=function(elem){return parseInt(window.getComputedStyle(elem).height,10);};var escapeCharacters=function(id){if(id.charAt(0)==='#'){id=id.substr(1);}
var string=String(id);var length=string.length;var index=-1;var codeUnit;var result='';var firstCodeUnit=string.charCodeAt(0);while(++index<length){codeUnit=string.charCodeAt(index);if(codeUnit===0x0000){throw new InvalidCharacterError('Invalid character: the input contains U+0000.');}
if((codeUnit>=0x0001&&codeUnit<=0x001F)||codeUnit==0x007F||(index===0&&codeUnit>=0x0030&&codeUnit<=0x0039)||(index===1&&codeUnit>=0x0030&&codeUnit<=0x0039&&firstCodeUnit===0x002D)){result+='\\'+codeUnit.toString(16)+' ';continue;}
if(codeUnit>=0x0080||codeUnit===0x002D||codeUnit===0x005F||codeUnit>=0x0030&&codeUnit<=0x0039||codeUnit>=0x0041&&codeUnit<=0x005A||codeUnit>=0x0061&&codeUnit<=0x007A){result+=string.charAt(index);continue;}
result+='\\'+string.charAt(index);}
return '#'+result;};var easingPattern=function(settings,time){var pattern;if(settings.easing==='easeInQuad')pattern=time*time;if(settings.easing==='easeOutQuad')pattern=time*(2-time);if(settings.easing==='easeInOutQuad')pattern=time<0.5?2*time*time:-1+(4-2*time)*time;if(settings.easing==='easeInCubic')pattern=time*time*time;if(settings.easing==='easeOutCubic')pattern=(--time)*time*time+1;if(settings.easing==='easeInOutCubic')pattern=time<0.5?4*time*time*time:(time-1)*(2*time-2)*(2*time-2)+1;if(settings.easing==='easeInQuart')pattern=time*time*time*time;if(settings.easing==='easeOutQuart')pattern=1-(--time)*time*time*time;if(settings.easing==='easeInOutQuart')pattern=time<0.5?8*time*time*time*time:1-8*(--time)*time*time*time;if(settings.easing==='easeInQuint')pattern=time*time*time*time*time;if(settings.easing==='easeOutQuint')pattern=1+(--time)*time*time*time*time;if(settings.easing==='easeInOutQuint')pattern=time<0.5?16*time*time*time*time*time:1+16*(--time)*time*time*time*time;if(!!settings.customEasing)pattern=settings.customEasing(time);return pattern||time;};var getDocumentHeight=function(){return Math.max(document.body.scrollHeight,document.documentElement.scrollHeight,document.body.offsetHeight,document.documentElement.offsetHeight,document.body.clientHeight,document.documentElement.clientHeight);};var getEndLocation=function(anchor,headerHeight,offset,clip){var location=0;if(anchor.offsetParent){do{location+=anchor.offsetTop;anchor=anchor.offsetParent;}while(anchor);}
location=Math.max(location-headerHeight-offset,0);if(clip){location=Math.min(location,getDocumentHeight()-window.innerHeight);}
return location;};var getHeaderHeight=function(header){return!header?0:(getHeight(header)+header.offsetTop);};var getSpeed=function(distance,settings){var speed=settings.speedAsDuration?settings.speed:Math.abs(distance/1000*settings.speed);if(settings.durationMax&&speed>settings.durationMax)return settings.durationMax;if(settings.durationMin&&speed<settings.durationMin)return settings.durationMin;return parseInt(speed,10);};var setHistory=function(options){if(!history.replaceState||!options.updateURL||history.state)return;var hash=window.location.hash;hash=hash?hash:'';history.replaceState({smoothScroll:JSON.stringify(options),anchor:hash?hash:window.pageYOffset},document.title,hash?hash:window.location.href);};var updateURL=function(anchor,isNum,options){if(isNum)return;if(!history.pushState||!options.updateURL)return;history.pushState({smoothScroll:JSON.stringify(options),anchor:anchor.id},document.title,anchor===document.documentElement?'#top':'#'+anchor.id);};var adjustFocus=function(anchor,endLocation,isNum){if(anchor===0){document.body.focus();}
if(isNum)return;anchor.focus();if(document.activeElement!==anchor){anchor.setAttribute('tabindex','-1');anchor.focus();anchor.style.outline='none';}
window.scrollTo(0,endLocation);};var emitEvent=function(type,options,anchor,toggle){if(!options.emitEvents||typeof window.CustomEvent!=='function')return;var event=new CustomEvent(type,{bubbles:true,detail:{anchor:anchor,toggle:toggle}});document.dispatchEvent(event);};var SmoothScroll=function(selector,options){var smoothScroll={};var settings,anchor,toggle,fixedHeader,eventTimeout,animationInterval;smoothScroll.cancelScroll=function(noEvent){cancelAnimationFrame(animationInterval);animationInterval=null;if(noEvent)return;emitEvent('scrollCancel',settings);};smoothScroll.animateScroll=function(anchor,toggle,options){smoothScroll.cancelScroll();var _settings=extend(settings||defaults,options||{});var isNum=Object.prototype.toString.call(anchor)==='[object Number]'?true:false;var anchorElem=isNum||!anchor.tagName?null:anchor;if(!isNum&&!anchorElem)return;var startLocation=window.pageYOffset;if(_settings.header&&!fixedHeader){fixedHeader=document.querySelector(_settings.header);}
var headerHeight=getHeaderHeight(fixedHeader);var endLocation=isNum?anchor:getEndLocation(anchorElem,headerHeight,parseInt((typeof _settings.offset==='function'?_settings.offset(anchor,toggle):_settings.offset),10),_settings.clip);var distance=endLocation-startLocation;var documentHeight=getDocumentHeight();var timeLapsed=0;var speed=getSpeed(distance,_settings);var start,percentage,position;var stopAnimateScroll=function(position,endLocation){var currentLocation=window.pageYOffset;if(position==endLocation||currentLocation==endLocation||((startLocation<endLocation&&window.innerHeight+currentLocation)>=documentHeight)){smoothScroll.cancelScroll(true);adjustFocus(anchor,endLocation,isNum);emitEvent('scrollStop',_settings,anchor,toggle);start=null;animationInterval=null;return true;}};var loopAnimateScroll=function(timestamp){if(!start){start=timestamp;}
timeLapsed+=timestamp-start;percentage=speed===0?0:(timeLapsed/speed);percentage=(percentage>1)?1:percentage;position=startLocation+(distance*easingPattern(_settings,percentage));window.scrollTo(0,Math.floor(position));if(!stopAnimateScroll(position,endLocation)){animationInterval=window.requestAnimationFrame(loopAnimateScroll);start=timestamp;}};if(window.pageYOffset===0){window.scrollTo(0,0);}
updateURL(anchor,isNum,_settings);if(reduceMotion()){window.scrollTo(0,Math.floor(endLocation));return;}
emitEvent('scrollStart',_settings,anchor,toggle);smoothScroll.cancelScroll(true);window.requestAnimationFrame(loopAnimateScroll);};var clickHandler=function(event){if(event.defaultPrevented)return;if(event.button!==0||event.metaKey||event.ctrlKey||event.shiftKey)return;if(!('closest'in event.target))return;toggle=event.target.closest(selector);if(!toggle||toggle.tagName.toLowerCase()!=='a'||event.target.closest(settings.ignore))return;if(toggle.hostname!==window.location.hostname||toggle.pathname!==window.location.pathname||!/#/.test(toggle.href))return;var hash=escapeCharacters(toggle.hash);var anchor;if(hash==='#'){if(!settings.topOnEmptyHash)return;anchor=document.documentElement;}else{anchor=document.querySelector(hash);}
anchor=!anchor&&hash==='#top'?document.documentElement:anchor;if(!anchor)return;event.preventDefault();setHistory(settings);smoothScroll.animateScroll(anchor,toggle);};var popstateHandler=function(event){if(history.state===null)return;if(!history.state.smoothScroll||history.state.smoothScroll!==JSON.stringify(settings))return;var anchor=history.state.anchor;if(typeof anchor==='string'&&anchor){anchor=document.querySelector(escapeCharacters(history.state.anchor));if(!anchor)return;}
smoothScroll.animateScroll(anchor,null,{updateURL:false});};smoothScroll.destroy=function(){if(!settings)return;document.removeEventListener('click',clickHandler,false);window.removeEventListener('popstate',popstateHandler,false);smoothScroll.cancelScroll();settings=null;anchor=null;toggle=null;fixedHeader=null;eventTimeout=null;animationInterval=null;};var init=function(){if(!supports())throw 'Smooth Scroll: This browser does not support the required JavaScript methods and browser APIs.';smoothScroll.destroy();settings=extend(defaults,options||{});fixedHeader=settings.header?document.querySelector(settings.header):null;document.addEventListener('click',clickHandler,false);if(settings.updateURL&&settings.popstate){window.addEventListener('popstate',popstateHandler,false);}};init();return smoothScroll;};return SmoothScroll;}));