/*!
* reveal.js 4.0.0-dev (Mon Apr 06 2020)
* https://revealjs.com
* MIT licensed
*
* Copyright (C) 2020 Hakim El Hattab, https://hakim.se
*/
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n=e.createBackground(t,e.element);o(t,"section").forEach((function(t){e.createBackground(t,n),n.classList.add("stack")}))})),this.Reveal.getConfig().parallaxBackgroundImage?(this.element.style.backgroundImage='url("'+this.Reveal.getConfig().parallaxBackgroundImage+'")',this.element.style.backgroundSize=this.Reveal.getConfig().parallaxBackgroundSize,this.element.style.backgroundRepeat=this.Reveal.getConfig().parallaxBackgroundRepeat,this.element.style.backgroundPosition=this.Reveal.getConfig().parallaxBackgroundPosition,setTimeout((function(){e.Reveal.getRevealElement().classList.add("has-parallax-background")}),1)):(this.element.style.backgroundImage="",this.Reveal.getRevealElement().classList.remove("has-parallax-background"))}},{key:"createBackground",value:function(e,t){var n=document.createElement("div");n.className="slide-background "+e.className.replace(/present|past|future/,"");var i=document.createElement("div");return i.className="slide-background-content",n.appendChild(i),t.appendChild(n),e.slideBackgroundElement=n,e.slideBackgroundContentElement=i,this.sync(e),n}},{key:"sync",value:function(e){var t=e.slideBackgroundElement,n=e.slideBackgroundContentElement;e.classList.remove("has-dark-background"),e.classList.remove("has-light-background"),t.removeAttribute("data-loaded"),t.removeAttribute("data-background-hash"),t.removeAttribute("data-background-size"),t.removeAttribute("data-background-transition"),t.style.backgroundColor="",n.style.backgroundSize="",n.style.backgroundRepeat="",n.style.backgroundPosition="",n.style.backgroundImage="",n.style.opacity="",n.innerHTML="";var i={background:e.getAttribute("data-background"),backgroundSize:e.getAttribute("data-background-size"),backgroundImage:e.getAttribute("data-background-image"),backgroundVideo:e.getAttribute("data-background-video"),backgroundIframe:e.getAttribute("data-background-iframe"),backgroundColor:e.getAttribute("data-background-color"),backgroundRepeat:e.getAttribute("data-background-repeat"),backgroundPosition:e.getAttribute("data-background-position"),backgroundTransition:e.getAttribute("data-background-transition"),backgroundOpacity:e.getAttribute("data-background-opacity")};i.background&&(/^(http|file|\/\/)/gi.test(i.background)||/\.(svg|png|jpg|jpeg|gif|bmp)([?#\s]|$)/gi.test(i.background)?e.setAttribute("data-background-image",i.background):t.style.background=i.background),(i.background||i.backgroundColor||i.backgroundImage||i.backgroundVideo||i.backgroundIframe)&&t.setAttribute("data-background-hash",i.background+i.backgroundSize+i.backgroundImage+i.backgroundVideo+i.backgroundIframe+i.backgroundColor+i.backgroundRepeat+i.backgroundPosition+i.backgroundTransition+i.backgroundOpacity),i.backgroundSize&&t.setAttribute("data-background-size",i.backgroundSize),i.backgroundColor&&(t.style.backgroundColor=i.backgroundColor),i.backgroundTransition&&t.setAttribute("data-background-transition",i.backgroundTransition),e.hasAttribute("data-preload")&&t.setAttribute("data-preload",""),i.backgroundSize&&(n.style.backgroundSize=i.backgroundSize),i.backgroundRepeat&&(n.style.backgroundRepeat=i.backgroundRepeat),i.backgroundPosition&&(n.style.backgroundPosition=i.backgroundPosition),i.backgroundOpacity&&(n.style.opacity=i.backgroundOpacity);var 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