diff --git a/demo.html b/demo.html
index d68215d7..8eda9eac 100644
--- a/demo.html
+++ b/demo.html
@@ -410,13 +410,6 @@ Reveal.addEventListener( 'customevent', function() {
 
 		<script type="module">
 
-			// WIP support for multiple reveal.js instances
-			// window.a = new Reveal(document.querySelector( '.reveal' ), {controls: false});
-			// a.initialize();
-			// window.b = new Reveal(document.querySelector( '.reveal' ), {controls: true});
-			// b.initialize();
-			// console.log(a.getConfig().controls,b.getConfig().controls);
-
 			// More info https://github.com/hakimel/reveal.js#configuration
 			Reveal.initialize({
 				controls: true,
@@ -439,5 +432,22 @@ Reveal.addEventListener( 'customevent', function() {
 
 		</script>
 
+		<!--
+		<script type="module">
+
+			// WIP support for multiple reveal.js instances
+			import Reveal from '/js/reveal.js'
+
+			window.a = new Reveal(document.querySelector( '.reveal' ), {controls: false});
+			a.initialize();
+
+			window.b = new Reveal(document.querySelector( '.reveal' ), {controls: true});
+			b.initialize();
+
+			console.log(a.getConfig().controls,b.getConfig().controls);
+
+		</script>
+		-->
+
 	</body>
 </html>
diff --git a/dist/reveal.min.js b/dist/reveal.min.js
index 7ca77b27..1061ad54 100644
--- a/dist/reveal.min.js
+++ b/dist/reveal.min.js
@@ -5,4 +5,4 @@
 *
 * Copyright (C) 2020 Hakim El Hattab, https://hakim.se
 */
-!function(e){var t={};function a(i){if(t[i])return t[i].exports;var n=t[i]={i:i,l:!1,exports:{}};return e[i].call(n.exports,n,n.exports,a),n.l=!0,n.exports}a.m=e,a.c=t,a.d=function(e,t,i){a.o(e,t)||Object.defineProperty(e,t,{enumerable:!0,get:i})},a.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},a.t=function(e,t){if(1&t&&(e=a(e)),8&t)return e;if(4&t&&"object"==typeof e&&e&&e.__esModule)return e;var i=Object.create(null);if(a.r(i),Object.defineProperty(i,"default",{enumerable:!0,value:e}),2&t&&"string"!=typeof e)for(var n in e)a.d(i,n,function(t){return e[t]}.bind(null,n));return i},a.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return a.d(t,"a",t),t},a.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},a.p="",a(a.s=0)}([function(e,t,a){"use strict";a.r(t);const i=/registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener/,n=(e,t)=>{for(let a in t)e[a]=t[a];return e},r=e=>Array.prototype.slice.call(e),s=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},o=(e,t)=>{e.style.transform=t},l=(e,t)=>{let a=e.parentNode;for(;a;){let e=a.matches||a.matchesSelector||a.msMatchesSelector;if(e&&e.call(a,t))return a;a=a.parentNode}return null},d=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},c=navigator.userAgent,u=document.createElement("div"),h=/(iphone|ipod|ipad|android)/gi.test(c)||"MacIntel"===navigator.platform&&navigator.maxTouchPoints>1,p=/chrome/i.test(c)&&!/edge/i.test(c),g=/android/gi.test(c),f="zoom"in u.style&&!h&&(p||/Version\/[\d\.]+.*Safari/.test(c));class m{constructor(e){this.Reveal=e}shouldPreload(e){let t=this.Reveal.getConfig().preloadIframes;return"boolean"!=typeof t&&(t=e.hasAttribute("data-preload")),t}load(e,t={}){e.style.display=this.Reveal.getConfig().display,r(e.querySelectorAll("img[data-src], video[data-src], audio[data-src], iframe[data-src]")).forEach(e=>{("IFRAME"!==e.tagName||this.shouldPreload(e))&&(e.setAttribute("src",e.getAttribute("data-src")),e.setAttribute("data-lazy-loaded",""),e.removeAttribute("data-src"))}),r(e.querySelectorAll("video, audio")).forEach(e=>{let t=0;r(e.querySelectorAll("source[data-src]")).forEach(e=>{e.setAttribute("src",e.getAttribute("data-src")),e.removeAttribute("data-src"),e.setAttribute("data-lazy-loaded",""),t+=1}),t>0&&e.load()});let a=e.slideBackgroundElement;if(a){a.style.display="block";let i=e.slideBackgroundContentElement,n=e.getAttribute("data-background-iframe");if(!1===a.hasAttribute("data-loaded")){a.setAttribute("data-loaded","true");let 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r=i.querySelector("iframe[data-src]");r&&this.shouldPreload(a)&&!/autoplay=(1|true|yes)/gi.test(n)&&r.getAttribute("src")!==n&&r.setAttribute("src",n)}}unload(e){e.style.display="none";let t=this.Reveal.getSlideBackground(e);t&&(t.style.display="none",r(t.querySelectorAll("iframe[src]")).forEach(e=>{e.removeAttribute("src")})),r(e.querySelectorAll("video[data-lazy-loaded][src], audio[data-lazy-loaded][src], iframe[data-lazy-loaded][src]")).forEach(e=>{e.setAttribute("data-src",e.getAttribute("src")),e.removeAttribute("src")}),r(e.querySelectorAll("video[data-lazy-loaded] source[src], audio source[src]")).forEach(e=>{e.setAttribute("data-src",e.getAttribute("src")),e.removeAttribute("src")})}formatEmbeddedContent(){let e=(e,t,a)=>{r(this.Reveal.getSlidesElement().querySelectorAll("iframe["+e+'*="'+t+'"]')).forEach(t=>{let i=t.getAttribute(e);i&&-1===i.indexOf(a)&&t.setAttribute(e,i+(/\?/.test(i)?"&":"?")+a)})};e("src","youtube.com/embed/","enablejsapi=1"),e("data-src","youtube.com/embed/","enablejsapi=1"),e("src","player.vimeo.com/","api=1"),e("data-src","player.vimeo.com/","api=1")}startEmbeddedContent(e){e&&!this.Reveal.isSpeakerNotes()&&(r(e.querySelectorAll('img[src$=".gif"]')).forEach(e=>{e.setAttribute("src",e.getAttribute("src"))}),r(e.querySelectorAll("video, audio")).forEach(e=>{if(l(e,".fragment")&&!l(e,".fragment.visible"))return;let t=this.Reveal.getConfig().autoPlayMedia;if("boolean"!=typeof t&&(t=e.hasAttribute("data-autoplay")||!!l(e,".slide-background")),t&&"function"==typeof e.play)if(e.readyState>1)this.startEmbeddedMedia({target:e});else if(h){let t=e.play();t&&"function"==typeof t.catch&&!1===e.controls&&t.catch(()=>{e.controls=!0,e.addEventListener("play",()=>{e.controls=!1})})}else e.removeEventListener("loadeddata",this.startEmbeddedMedia),e.addEventListener("loadeddata",this.startEmbeddedMedia)}),r(e.querySelectorAll("iframe[src]")).forEach(e=>{l(e,".fragment")&&!l(e,".fragment.visible")||this.startEmbeddedIframe({target:e})}),r(e.querySelectorAll("iframe[data-src]")).forEach(e=>{l(e,".fragment")&&!l(e,".fragment.visible")||e.getAttribute("src")!==e.getAttribute("data-src")&&(e.removeEventListener("load",this.startEmbeddedIframe),e.addEventListener("load",this.startEmbeddedIframe),e.setAttribute("src",e.getAttribute("data-src")))}))}startEmbeddedMedia(e){let t=!!l(e.target,"html"),a=!!l(e.target,".present");t&&a&&(e.target.currentTime=0,e.target.play()),e.target.removeEventListener("loadeddata",this.startEmbeddedMedia)}startEmbeddedIframe(e){let t=e.target;if(t&&t.contentWindow){let a=!!l(e.target,"html"),i=!!l(e.target,".present");if(a&&i){let e=this.Reveal.getConfig().autoPlayMedia;"boolean"!=typeof e&&(e=t.hasAttribute("data-autoplay")||!!l(t,".slide-background")),/youtube\.com\/embed\//.test(t.getAttribute("src"))&&e?t.contentWindow.postMessage('{"event":"command","func":"playVideo","args":""}',"*"):/player\.vimeo\.com\//.test(t.getAttribute("src"))&&e?t.contentWindow.postMessage('{"method":"play"}',"*"):t.contentWindow.postMessage("slide:start","*")}}}stopEmbeddedContent(e,t={}){t=n({unloadIframes:!0},t),e&&e.parentNode&&(r(e.querySelectorAll("video, audio")).forEach(e=>{e.hasAttribute("data-ignore")||"function"!=typeof e.pause||(e.setAttribute("data-paused-by-reveal",""),e.pause())}),r(e.querySelectorAll("iframe")).forEach(e=>{e.contentWindow&&e.contentWindow.postMessage("slide:stop","*"),e.removeEventListener("load",this.startEmbeddedIframe)}),r(e.querySelectorAll('iframe[src*="youtube.com/embed/"]')).forEach(e=>{!e.hasAttribute("data-ignore")&&e.contentWindow&&"function"==typeof e.contentWindow.postMessage&&e.contentWindow.postMessage('{"event":"command","func":"pauseVideo","args":""}',"*")}),r(e.querySelectorAll('iframe[src*="player.vimeo.com/"]')).forEach(e=>{!e.hasAttribute("data-ignore")&&e.contentWindow&&"function"==typeof e.contentWindow.postMessage&&e.contentWindow.postMessage('{"method":"pause"}',"*")}),!0===t.unloadIframes&&r(e.querySelectorAll("iframe[data-src]")).forEach(e=>{e.setAttribute("src","about:blank"),e.removeAttribute("src")}))}}class v{constructor(e){this.Reveal=e,this.autoAnimateCounter=0}run(e,t){if(this.reset(),e.hasAttribute("data-auto-animate")&&t.hasAttribute("data-auto-animate")){this.autoAnimateStyleSheet=this.autoAnimateStyleSheet||d();let a=this.getAutoAnimateOptions(t);e.dataset.autoAnimate="pending",t.dataset.autoAnimate="pending";let i=this.getAutoAnimatableElements(e,t).map(e=>this.getAutoAnimateCSS(e.from,e.to,e.options||{},a,this.autoAnimateCounter++));"false"!==t.dataset.autoAnimateUnmatched&&!0===this.Reveal.getConfig().autoAnimateUnmatched&&(this.getUnmatchedAutoAnimateElements(t).forEach(e=>{e.dataset.autoAnimateTarget="unmatched"}),i.push(`[data-auto-animate="running"] [data-auto-animate-target="unmatched"] { transition: opacity ${.8*a.duration}s ease ${.2*a.duration}s; }`)),this.autoAnimateStyleSheet.innerHTML=i.join(""),requestAnimationFrame(()=>{this.autoAnimateStyleSheet&&(getComputedStyle(this.autoAnimateStyleSheet).fontWeight,t.dataset.autoAnimate="running")}),this.Reveal.dispatchEvent("autoanimate",{fromSlide:e,toSlide:t,sheet:this.autoAnimateStyleSheet})}}reset(){r(this.Reveal.getRevealElement().querySelectorAll('[data-auto-animate]:not([data-auto-animate=""])')).forEach(e=>{e.dataset.autoAnimate=""}),r(this.Reveal.getRevealElement().querySelectorAll("[data-auto-animate-target]")).forEach(e=>{delete 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${t.y}px)`),n&&e.push(`scale(${t.scaleX}, ${t.scaleY})`),s.styles.transform=e.join(" "),s.styles["transform-origin"]="top left",o.styles.transform="none"}}for(let e in o.styles){const t=o.styles[e],a=s.styles[e];t===a?delete o.styles[e]:(!0===t.explicitValue&&(o.styles[e]=t.value),!0===a.explicitValue&&(s.styles[e]=a.value))}let l="",d=Object.keys(o.styles);if(d.length>0){s.styles.transition="none",o.styles.transition=`all ${r.duration}s ${r.easing} ${r.delay}s`,o.styles["transition-property"]=d.join(", "),o.styles["will-change"]=d.join(", "),l='[data-auto-animate-target="'+n+'"] {'+Object.keys(s.styles).map(e=>e+": "+s.styles[e]+" !important;").join("")+'}[data-auto-animate="running"] [data-auto-animate-target="'+n+'"] {'+Object.keys(o.styles).map(e=>e+": "+o.styles[e]+" !important;").join("")+"}"}return l}getAutoAnimateOptions(e,t){let a={easing:this.Reveal.getConfig().autoAnimateEasing,duration:this.Reveal.getConfig().autoAnimateDuration,delay:0};if(a=n(a,t),e.closest&&e.parentNode){let t=e.parentNode.closest("[data-auto-animate-target]");t&&(a=this.getAutoAnimateOptions(t,a))}return e.dataset.autoAnimateEasing&&(a.easing=e.dataset.autoAnimateEasing),e.dataset.autoAnimateDuration&&(a.duration=parseFloat(e.dataset.autoAnimateDuration)),e.dataset.autoAnimateDelay&&(a.delay=parseFloat(e.dataset.autoAnimateDelay)),a}getAutoAnimatableProperties(e,t,a){let i={styles:[]};if(!1!==a.translate||!1!==a.scale){let e;e="function"==typeof a.measure?a.measure(t):t.getBoundingClientRect(),i.x=e.x,i.y=e.y,i.width=e.width,i.height=e.height}const n=getComputedStyle(t);return(a.styles||this.Reveal.getConfig().autoAnimateStyles).forEach(t=>{let a;"string"==typeof t&&(t={property:t}),a=void 0!==t.from&&"from"===e?{value:t.from,explicitValue:!0}:void 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e=o[i].length-1,t=s[i].length-1;s[i][e]?(l=s[i][e],s[i][e]=null):s[i][t]&&(l=s[i][t],s[i][t]=null)}l&&e.push({from:l,to:t,options:r})})}getUnmatchedAutoAnimateElements(e){return[].slice.call(e.children).reduce((e,t)=>{const a=t.querySelector("[data-auto-animate-target]");return t.hasAttribute("data-auto-animate-target")||a||e.push(t),t.querySelector("[data-auto-animate-target]")&&(e=e.concat(this.getUnmatchedAutoAnimateElements(t))),e},[])}}class b{constructor(e){this.Reveal=e}showAll(){r(this.Reveal.getSlidesElement().querySelectorAll(".fragment")).forEach(e=>{e.classList.add("visible"),e.classList.remove("current-fragment")})}availableRoutes(){let e=this.Reveal.getCurrentSlide();if(e&&this.Reveal.getConfig().fragments){let t=e.querySelectorAll(".fragment"),a=e.querySelectorAll(".fragment:not(.visible)");return{prev:t.length-a.length>0,next:!!a.length}}return{prev:!1,next:!1}}sort(e,t=!1){e=r(e);let a=[],i=[],n=[];e.forEach(e=>{if(e.hasAttribute("data-fragment-index")){let t=parseInt(e.getAttribute("data-fragment-index"),10);a[t]||(a[t]=[]),a[t].push(e)}else i.push([e])}),a=a.concat(i);let s=0;return a.forEach(e=>{e.forEach(e=>{n.push(e),e.setAttribute("data-fragment-index",s)}),s++}),!0===t?a:n}sortAll(){this.Reveal.getHorizontalSlides().forEach(e=>{let t=r(e.querySelectorAll("section"));t.forEach((e,t)=>{this.sort(e.querySelectorAll(".fragment"))},this),0===t.length&&this.sort(e.querySelectorAll(".fragment"))})}update(e,t){let a={shown:[],hidden:[]},i=this.Reveal.getCurrentSlide();if(i&&this.Reveal.getConfig().fragments&&(t=t||this.sort(i.querySelectorAll(".fragment"))).length){let n=0;if("number"!=typeof e){let t=this.sort(i.querySelectorAll(".fragment.visible")).pop();t&&(e=parseInt(t.getAttribute("data-fragment-index")||0,10))}r(t).forEach((t,i)=>{t.hasAttribute("data-fragment-index")&&(i=parseInt(t.getAttribute("data-fragment-index"),10)),n=Math.max(n,i),i<=e?(t.classList.contains("visible")||a.shown.push(t),t.classList.add("visible"),t.classList.remove("current-fragment"),this.Reveal.announceStatus(this.Reveal.getStatusText(t)),i===e&&(t.classList.add("current-fragment"),this.Reveal.slideContent.startEmbeddedContent(t))):(t.classList.contains("visible")&&a.hidden.push(t),t.classList.remove("visible"),t.classList.remove("current-fragment"))}),e="number"==typeof e?e:-1,e=Math.max(Math.min(e,n),-1),i.setAttribute("data-fragment",e)}return a}goto(e,t=0){let a=this.Reveal.getCurrentSlide();if(a&&this.Reveal.getConfig().fragments){let i=this.sort(a.querySelectorAll(".fragment"));if(i.length){if("number"!=typeof e){let t=this.sort(a.querySelectorAll(".fragment.visible")).pop();e=t?parseInt(t.getAttribute("data-fragment-index")||0,10):-1}e+=t;let n=this.update(e,i);return n.hidden.length&&this.Reveal.dispatchEvent("fragmenthidden",{fragment:n.hidden[0],fragments:n.hidden}),n.shown.length&&this.Reveal.dispatchEvent("fragmentshown",{fragment:n.shown[0],fragments:n.shown}),this.Reveal.updateControls(),this.Reveal.updateProgress(),this.Reveal.getConfig().fragmentInURL&&this.Reveal.writeURL(),!(!n.shown.length&&!n.hidden.length)}}return!1}next(){return this.goto(null,1)}prev(){return this.goto(null,-1)}}class y{constructor(e){this.Reveal=e,this.active=!1,this.onSlideClicked=this.onSlideClicked.bind(this)}activate(){if(this.Reveal.getConfig().overview&&!this.isActive()){this.active=!0,this.Reveal.getRevealElement().classList.add("overview"),this.Reveal.cancelAutoSlide(),this.Reveal.getSlidesElement().appendChild(this.Reveal.getBackgroundsElement()),r(this.Reveal.getRevealElement().querySelectorAll(".slides 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This is likely due to the site's policy (x-frame-options).</span>\n\t\t\t\t</small>\n\t\t\t</div>`,I.overlay.querySelector("iframe").addEventListener("load",e=>{I.overlay.classList.add("loaded")},!1),I.overlay.querySelector(".close").addEventListener("click",e=>{fe(),e.preventDefault()},!1),I.overlay.querySelector(".external").addEventListener("click",e=>{fe()},!1)}(t),e.preventDefault())}}function jt(e){Le()&&!1===l.loop?(Ie(0,0),ut()):Y?ut():ct()}return n(a,{VERSION:"4.0.0-dev",initialize:function(){if(e)return I.wrapper=e,I.slides=e.querySelector(".slides"),window.addEventListener("load",me,!1),l={...E,...t,...a.getQueryHash()},T.load(l.dependencies).then(Q),new Promise(e=>a.addEventListener("ready",e));console.warn("reveal.js can not initialize without a valid .reveal element.")},configure:ne,sync:Te,syncSlide:function(e=A){ie(e),Be(e),B.load(e),Ve(),ze()},syncFragments:Be,slide:Ie,left:ht,right:pt,up:gt,down:ft,prev:mt,next:vt,navigateTo:Ie,navigateLeft:ht,navigateRight:pt,navigateUp:gt,navigateDown:ft,navigatePrev:mt,navigateNext:vt,navigateFragment:H.goto.bind(H),prevFragment:H.prev.bind(H),nextFragment:H.next.bind(H),layout:me,shuffle:Oe,availableRoutes:Xe,availableFragments:H.availableRoutes.bind(H),toggleHelp:pe,toggleOverview:D.toggle.bind(D),togglePause:Ne,toggleAutoSlide:qe,isFirstSlide:ke,isLastSlide:Le,isLastVerticalSlide:Ee,isOverview:D.isActive.bind(D),isPaused:Pe,isAutoSliding:function(){return!(!V||Y)},isSpeakerNotes:_e,loadSlide:B.load.bind(B),unloadSlide:B.unload.bind(B),addEventListeners:re,removeEventListeners:se,dispatchEvent:de,getState:ot,setState:function(e){if("object"==typeof e){Ie(s(e.indexh),s(e.indexv),s(e.indexf));let t=s(e.paused),a=s(e.overview);"boolean"==typeof t&&t!==Pe()&&Ne(t),"boolean"==typeof a&&a!==D.isActive()&&D.toggle(a)}},getSlidePastCount:Ye,getProgress:Ke,getIndices:Ze,getSlides:Ge,getSlidesAttributes:function(){return Ge().map(e=>{let t={};for(let a=0;a<e.attributes.length;a++){let i=e.attributes[a];t[i.name]=i.value}return t})},getTotalSlides:nt,getSlide:rt,getSlideBackground:function(e,t){let a="number"==typeof e?rt(e,t):e;if(a)return a.slideBackgroundElement},getSlideNotes:st,getHorizontalSlides:et,getVerticalSlides:tt,hasHorizontalSlides:at,hasVerticalSlides:it,addKeyBinding:function(e,t){"object"==typeof e&&e.keyCode?J[e.keyCode]={callback:t,key:e.key,description:e.description}:J[e]={callback:t,key:null,description:null}},removeKeyBinding:function(e){delete J[e]},triggerKey:e=>St({keyCode:e}),registerKeyboardShortcut:(e,t)=>_[e]=t,addEventListener:(e,t,i)=>{a.getRevealElement().addEventListener(e,t,i)},removeEventListener:(e,t,i)=>{a.getRevealElement().removeEventListener(e,t,i)},registerPlugin:T.registerPlugin.bind(T),hasPlugin:T.hasPlugin.bind(T),getPlugin:T.getPlugin.bind(T),getPlugins:T.getRegisteredPlugins.bind(T),getComputedSlideSize:be,getPreviousSlide:()=>p,getCurrentSlide:()=>A,getScale:()=>P,getConfig:()=>l,getQueryHash:()=>{let e={};location.search.replace(/[A-Z0-9]+?=([\w\.%-]*)/gi,t=>{e[t.split("=").shift()]=t.split("=").pop()});for(let t in e){let a=e[t];e[t]=s(unescape(a))}return void 0!==e.dependencies&&delete e.dependencies,e},getRevealElement:()=>I.wrapper||document.querySelector(".reveal"),getSlidesElement:()=>I.slides,getBackgroundsElement:()=>I.background,isReady:()=>R,announceStatus:Z,getStatusText:G,slideContent:B,updateControls:Ue,updateProgress:We,updateSlidesVisibility:De,writeURL:Qe,transformSlides:oe,cueAutoSlide:lt,cancelAutoSlide:dt})};window.Reveal={initialize:e=>(window.Reveal=new L(document.querySelector(".reveal"),e),window.Reveal.initialize())}}]);
\ No newline at end of file
diff --git a/js/index.js b/js/index.js
index ccd042a8..51b01434 100644
--- a/js/index.js
+++ b/js/index.js
@@ -1,21 +1,16 @@
 import Presentation from './reveal.js'
 
-// The Reveal class can be instantiated to run multiple
-// presentations on the same page
-//
-// let rvl = new Reveal( <HTMLElement>, { controls: false } )
-// rvl.initialize()
-// rvl.slide(2)
-window.Reveal = Presentation;
-
-// Simplified way to create a reveal.js instance on
-// a page with only one presentation, makes us backwards
-// compatible with reveal.js pre 4.0
+// Provides a backwards compatible way to initialize
+// reveal.js when there is only one presentation on
+// the page.
 //
 // Reveal.initialize({ controls: false })
-// Revea.slide(2)
-window.Reveal.initialize = options => {
-	window.Reveal = new Presentation( document.querySelector( '.reveal' ), options );
-	window.Reveal.initialize();
-	return new Promise( resolve => window.Reveal.addEventListener( 'ready', resolve ) );
+// Reveal.slide(2)
+window.Reveal = {
+
+	initialize: options => {
+		window.Reveal = new Presentation( document.querySelector( '.reveal' ), options );
+		return window.Reveal.initialize();
+	}
+
 }
\ No newline at end of file
diff --git a/js/reveal.js b/js/reveal.js
index a76ae232..10d5f8a0 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -153,7 +153,7 @@ export default function( revealElement, options ) {
 		// Load plugins then move on to #start()
 		plugins.load( config.dependencies ).then( start )
 
-		return Reveal;
+		return new Promise( resolve => Reveal.addEventListener( 'ready', resolve ) );
 
 	}