/*!
* reveal.js 4.2.1
* https://revealjs.com
* MIT licensed
*
* Copyright (C) 2011-2021 Hakim El Hattab, https://hakim.se
*/
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t=this.previousBackground?this.previousBackground.getAttribute("data-background-hash"):null,i=n.getAttribute("data-background-hash");i&&i===t&&n!==this.previousBackground&&this.element.classList.add("no-transition"),this.previousBackground=n}i&&["has-light-background","has-dark-background"].forEach((e=>{i.classList.contains(e)?this.Reveal.getRevealElement().classList.add(e):this.Reveal.getRevealElement().classList.remove(e)}),this),setTimeout((()=>{this.element.classList.remove("no-transition")}),1)}updateParallax(){let e=this.Reveal.getIndices();if(this.Reveal.getConfig().parallaxBackgroundImage){let t,i,a=this.Reveal.getHorizontalSlides(),n=this.Reveal.getVerticalSlides(),s=this.element.style.backgroundSize.split(" ");1===s.length?t=i=parseInt(s[0],10):(t=parseInt(s[0],10),i=parseInt(s[1],10));let r,o,l=this.element.offsetWidth,d=a.length;r="number"==typeof 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