diff --git a/inst/reveal.js-4.2.1/dist/reveal.esm.js b/inst/reveal.js-4.2.1/dist/reveal.esm.js
new file mode 100644
index 0000000..6f063e0
--- /dev/null
+++ b/inst/reveal.js-4.2.1/dist/reveal.esm.js
@@ -0,0 +1,9 @@
+/*!
+* reveal.js 4.2.1
+* https://revealjs.com
+* MIT licensed
+*
+* Copyright (C) 2011-2021 Hakim El Hattab, https://hakim.se
+*/
+const e=(e,t)=>{for(let i in t)e[i]=t[i];return e},t=(e,t)=>Array.from(e.querySelectorAll(t)),i=(e,t,i)=>{i?e.classList.add(t):e.classList.remove(t)},a=e=>{if("string"==typeof e){if("null"===e)return null;if("true"===e)return!0;if("false"===e)return!1;if(e.match(/^-?[\d\.]+$/))return parseFloat(e)}return e},n=(e,t)=>{e.style.transform=t},s=(e,t)=>{let i=e.matches||e.matchesSelector||e.msMatchesSelector;return!(!i||!i.call(e,t))},r=(e,t)=>{if("function"==typeof e.closest)return e.closest(t);for(;e;){if(s(e,t))return e;e=e.parentNode}return null},o=(e,t,i,a="")=>{let n=e.querySelectorAll("."+i);for(let t=0;t<n.length;t++){let i=n[t];if(i.parentNode===e)return i}let s=document.createElement(t);return s.className=i,s.innerHTML=a,e.appendChild(s),s},l=e=>{let t=document.createElement("style");return t.type="text/css",e&&e.length>0&&(t.styleSheet?t.styleSheet.cssText=e:t.appendChild(document.createTextNode(e))),document.head.appendChild(t),t},d=()=>{let 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