move plugin logic to Plugins controller

7 files changed, 235 insertions, 187 deletions

diff --git a/demo.html b/demo.html
index 8249a0b..d68215d 100644
--- a/demo.html
+++ b/demo.html
@@ -411,8 +411,10 @@ Reveal.addEventListener( 'customevent', function() {
 		<script type="module">
 
 			// WIP support for multiple reveal.js instances
-			// let a = new Reveal(document.querySelector( '.reveal' ), {controls: false});
-			// let b = new Reveal(document.querySelector( '.reveal' ), {controls: true});
+			// 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
diff --git a/dist/reveal.css b/dist/reveal.css
index 406c611..d0835a7 100644
--- a/dist/reveal.css
+++ b/dist/reveal.css
@@ -1,5 +1,5 @@
 /*!
-* reveal.js 4.0.0-dev (Fri Mar 06 2020)
+* reveal.js 4.0.0-dev (Sat Mar 07 2020)
 * https://revealjs.com
 * MIT licensed
 *
diff --git a/dist/reveal.min.js b/dist/reveal.min.js
index d642437..0231cfc 100644
--- a/dist/reveal.min.js
+++ b/dist/reveal.min.js
@@ -5,4 +5,4 @@
 *
 * Copyright (C) 2020 Hakim El Hattab, https://hakim.se
 */
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r.hidden.length&&se("fragmenthidden",{fragment:r.hidden[0],fragments:r.hidden}),r.shown.length&&se("fragmentshown",{fragment:r.shown[0],fragments:r.shown}),Ue(),$e(),f.fragmentInURL&&pt(),!(!r.shown.length&&!r.hidden.length)}}return!1}function Mt(){return xt(null,1)}function Nt(){return xt(null,-1)}function qt(){if(Pt(),b&&!1!==f.autoSlide){let e=b.querySelector(".current-fragment");e||(e=b.querySelector(".fragment"));let t=e?e.getAttribute("data-autoslide"):null,r=b.parentNode?b.parentNode.getAttribute("data-autoslide"):null,i=b.getAttribute("data-autoslide");F=t?parseInt(t,10):i?parseInt(i,10):r?parseInt(r,10):f.autoSlide,0===b.querySelectorAll(".fragment").length&&n(b.querySelectorAll("video, audio")).forEach(e=>{e.hasAttribute("data-autoplay")&&F&&1e3*e.duration/e.playbackRate>F&&(F=1e3*e.duration/e.playbackRate+1e3)}),!F||X||Te()||Se()||a.isLastSlide()&&!rt().next&&!0!==f.loop||(U=setTimeout(()=>{"function"==typeof f.autoSlideMethod?f.autoSlideMethod():Bt(),qt()},F),V=Date.now()),S&&S.setPlaying(-1!==U)}}function Pt(){clearTimeout(U),U=-1}function It(){F&&!X&&(X=!0,se("autoslidepaused"),clearTimeout(U),S&&S.setPlaying(!1))}function Tt(){F&&X&&(X=!1,se("autoslideresumed"),qt())}function Ct(){q=!0,f.rtl?(Se()||!1===Mt())&&at().left&&Re(m+1,"grid"===f.navigationMode?v:void 0):(Se()||!1===Nt())&&at().left&&Re(m-1,"grid"===f.navigationMode?v:void 0)}function Rt(){q=!0,f.rtl?(Se()||!1===Nt())&&at().right&&Re(m-1,"grid"===f.navigationMode?v:void 0):(Se()||!1===Mt())&&at().right&&Re(m+1,"grid"===f.navigationMode?v:void 0)}function Dt(){(Se()||!1===Nt())&&at().up&&Re(m,v-1)}function Ot(){P=!0,(Se()||!1===Mt())&&at().down&&Re(m,v+1)}function zt(){if(!1===Nt())if(at().up)Dt();else{let e;if(e=f.rtl?n(R.wrapper.querySelectorAll(".slides>section.future")).pop():n(R.wrapper.querySelectorAll(".slides>section.past")).pop(),e){let t=e.querySelectorAll("section").length-1||void 0;Re(m-1,t)}}}function Bt(){if(q=!0,P=!0,!1===Mt()){let e=at();e.down&&e.right&&f.loop&&a.isLastVerticalSlide(b)&&(e.down=!1),e.down?Ot():f.rtl?Ct():Rt()}}function Ht(e){for(;e&&"function"==typeof e.hasAttribute;){if(e.hasAttribute("data-prevent-swipe"))return!0;e=e.parentNode}return!1}function jt(e){f.autoSlideStoppable&&It()}function $t(e){Me(),clearTimeout(j),j=setTimeout(Ne,f.hideCursorTime)}function Wt(e){e.shiftKey&&63===e.charCode&&ue()}function Ft(e){if("function"==typeof f.keyboardCondition&&!1===f.keyboardCondition(e))return!0;let t=e.keyCode,r=X;jt();let n=document.activeElement&&"inherit"!==document.activeElement.contentEditable,i=document.activeElement&&document.activeElement.tagName&&/input|textarea/i.test(document.activeElement.tagName),o=document.activeElement&&document.activeElement.className&&/speaker-notes/i.test(document.activeElement.className),s=e.shiftKey&&32===e.keyCode,l=e.shiftKey&&37===t,d=e.shiftKey&&39===t,c=!s&&!l&&!d&&(e.shiftKey||e.altKey||e.ctrlKey||e.metaKey);if(n||i||o||c)return;let u,p=[66,86,190,191];if("object"==typeof f.keyboard)for(u in f.keyboard)"togglePause"===f.keyboard[u]&&p.push(parseInt(u,10));if(Te()&&-1===p.indexOf(t))return!1;let h="linear"===f.navigationMode||!vt()||!yt(),g=!1;if("object"==typeof f.keyboard)for(u in f.keyboard)if(parseInt(u,10)===t){let t=f.keyboard[u];"function"==typeof t?t.apply(null,[e]):"string"==typeof t&&"function"==typeof a[t]&&a[t].call(),g=!0}if(!1===g)for(u in _)if(parseInt(u,10)===t){let t=_[u].callback;"function"==typeof t?t.apply(null,[e]):"string"==typeof t&&"function"==typeof a[t]&&a[t].call(),g=!0}!1===g&&(g=!0,80===t||33===t?zt():78===t||34===t?Bt():72===t||37===t?l?Re(0):!Se()&&h?zt():Ct():76===t||39===t?d?Re(Number.MAX_VALUE):!Se()&&h?Bt():Rt():75===t||38===t?!Se()&&h?zt():Dt():74===t||40===t?!Se()&&h?Bt():Ot():36===t?Re(0):35===t?Re(Number.MAX_VALUE):32===t?(Se()&&ke(),e.shiftKey?zt():Bt()):58===t||59===t||66===t||86===t||190===t||191===t?Ie():70===t?(()=>{let e=document.documentElement,t=e.requestFullscreen||e.webkitRequestFullscreen||e.webkitRequestFullScreen||e.mozRequestFullScreen||e.msRequestFullscreen;t&&t.apply(e)})():65===t?f.autoSlideStoppable&&Ce(r):g=!1),g?e.preventDefault&&e.preventDefault():27!==t&&79!==t||(R.overlay?he():Ee(),e.preventDefault&&e.preventDefault()),qt()}function Ut(e){if(Ht(e.target))return!0;Y.startX=e.touches[0].clientX,Y.startY=e.touches[0].clientY,Y.startCount=e.touches.length}function Vt(e){if(Ht(e.target))return!0;if(Y.captured)c.match(/android/gi)&&e.preventDefault();else{jt();let t=e.touches[0].clientX,a=e.touches[0].clientY;if(1===e.touches.length&&2!==Y.startCount){let r=t-Y.startX,n=a-Y.startY;r>Y.threshold&&Math.abs(r)>Math.abs(n)?(Y.captured=!0,"linear"===f.navigationMode?f.rtl?Bt():zt():Ct()):r<-Y.threshold&&Math.abs(r)>Math.abs(n)?(Y.captured=!0,"linear"===f.navigationMode?f.rtl?zt():Bt():Rt()):n>Y.threshold?(Y.captured=!0,"linear"===f.navigationMode?zt():Dt()):n<-Y.threshold&&(Y.captured=!0,"linear"===f.navigationMode?Bt():Ot()),f.embedded?(Y.captured||xe(b))&&e.preventDefault():e.preventDefault()}}}function Xt(e){Y.captured=!1}function Yt(e){e.pointerType!==e.MSPOINTER_TYPE_TOUCH&&"touch"!==e.pointerType||(e.touches=[{clientX:e.clientX,clientY:e.clientY}],Ut(e))}function Kt(e){e.pointerType!==e.MSPOINTER_TYPE_TOUCH&&"touch"!==e.pointerType||(e.touches=[{clientX:e.clientX,clientY:e.clientY}],Vt(e))}function _t(e){e.pointerType!==e.MSPOINTER_TYPE_TOUCH&&"touch"!==e.pointerType||(e.touches=[{clientX:e.clientX,clientY:e.clientY}],Xt())}function Jt(e){if(Date.now()-z>600){z=Date.now();let t=e.detail||-e.wheelDelta;t>0?Bt():t<0&&zt()}}function Qt(e){jt(),e.preventDefault();let t=ft().length,a=Math.floor(e.clientX/R.wrapper.offsetWidth*t);f.rtl&&(a=t-a),Re(a)}function Zt(e){e.preventDefault(),jt(),"linear"===f.navigationMode?zt():Ct()}function Gt(e){e.preventDefault(),jt(),"linear"===f.navigationMode?Bt():Rt()}function ea(e){e.preventDefault(),jt(),Dt()}function ta(e){e.preventDefault(),jt(),Ot()}function aa(e){e.preventDefault(),jt(),zt()}function ra(e){e.preventDefault(),jt(),Bt()}function na(e){ut()}function ia(e){ge()}function oa(e){!1===document.hidden&&document.activeElement!==document.body&&("function"==typeof document.activeElement.blur&&document.activeElement.blur(),document.body.focus())}function sa(e){if($&&Se()){e.preventDefault();let t=e.target;for(;t&&!t.nodeName.match(/section/gi);)t=t.parentNode;if(t&&!t.classList.contains("disabled")&&(ke(),t.nodeName.match(/section/gi))){Re(parseInt(t.getAttribute("data-index-h"),10),parseInt(t.getAttribute("data-index-v"),10))}}}function la(e){if(e.currentTarget&&e.currentTarget.hasAttribute("href")){let t=e.currentTarget.getAttribute("href");t&&(!function(e){he(),R.overlay=document.createElement("div"),R.overlay.classList.add("overlay"),R.overlay.classList.add("overlay-preview"),R.wrapper.appendChild(R.overlay),R.overlay.innerHTML=`<header>\n\t\t\t\t<a class="close" href="#"><span class="icon"></span></a>\n\t\t\t\t<a class="external" href="${e}" target="_blank"><span class="icon"></span></a>\n\t\t\t</header>\n\t\t\t<div class="spinner"></div>\n\t\t\t<div class="viewport">\n\t\t\t\t<iframe src="${e}"></iframe>\n\t\t\t\t<small class="viewport-inner">\n\t\t\t\t\t<span class="x-frame-error">Unable to load iframe. This is likely due to the site's policy (x-frame-options).</span>\n\t\t\t\t</small>\n\t\t\t</div>`,R.overlay.querySelector("iframe").addEventListener("load",e=>{R.overlay.classList.add("loaded")},!1),R.overlay.querySelector(".close").addEventListener("click",e=>{he(),e.preventDefault()},!1),R.overlay.querySelector(".external").addEventListener("click",e=>{he()},!1)}(t),e.preventDefault())}}function da(e){a.isLastSlide()&&!1===f.loop?(Re(0,0),Tt()):X?Tt():It()}return a={VERSION:"4.0.0-dev",initialize:function(){if(!e)return void console.warn("reveal.js must be instantiated with a valid .reveal element");!function(){A=/(iphone|ipod|ipad|android)/gi.test(c)||"MacIntel"===navigator.platform&&navigator.maxTouchPoints>1,k=/chrome/i.test(c)&&!/edge/i.test(c);let e=document.createElement("div");O.zoom="zoom"in e.style&&!A&&(k||/Version\/[\d\.]+.*Safari/.test(c))}(),R.wrapper=e,R.slides=e.querySelector(".slides"),window.addEventListener("load",ge,!1);let r=a.getQueryHash();return void 0!==r.dependencies&&delete r.dependencies,f={...h,...t,...r},D.load(f.dependencies).then(J),a},configure:ae,sync:De,syncSlide:function(e=b){te(e),Oe(e),et(e),Ve(),je()},syncFragments:Oe,slide:Re,left:Ct,right:Rt,up:Dt,down:Ot,prev:zt,next:Bt,navigateTo:Re,navigateLeft:Ct,navigateRight:Rt,navigateUp:Dt,navigateDown:Ot,navigatePrev:zt,navigateNext:Bt,navigateFragment:xt,prevFragment:Nt,nextFragment:Mt,layout:ge,shuffle:ze,availableRoutes:at,availableFragments:rt,toggleHelp:ue,toggleOverview:Ee,togglePause:Ie,toggleAutoSlide:Ce,isOverview:Se,isPaused:Te,isAutoSliding:function(){return!(!F||X)},isSpeakerNotes:ct,loadSlide:et,unloadSlide:tt,addEventListeners:re,removeEventListeners:ne,getState:Et,setState:function(e){if("object"==typeof e){Re(i(e.indexh),i(e.indexv),i(e.indexf));let t=i(e.paused),a=i(e.overview);"boolean"==typeof t&&t!==Te()&&Ie(t),"boolean"==typeof a&&a!==Se()&&Ee(a)}},getSlidePastCount:lt,getProgress:dt,getIndices:ht,getSlides:gt,getSlidesAttributes:function(){return gt().map(e=>{let t={};for(let a=0;a<e.attributes.length;a++){let r=e.attributes[a];t[r.name]=r.value}return t})},getTotalSlides:bt,getSlide:wt,getSlideBackground:At,getSlideNotes:kt,getHorizontalSlides:ft,getVerticalSlides:mt,hasHorizontalSlides:vt,hasVerticalSlides:yt,addKeyBinding:function(e,t){"object"==typeof e&&e.keyCode?_[e.keyCode]={callback:t,key:e.key,description:e.description}:_[e]={callback:t,key:null,description:null}},removeKeyBinding:function(e){delete _[e]},registerPlugin:(...e)=>D.registerPlugin(...e),hasPlugin:(...e)=>D.hasPlugin(...e),getPlugin:(...e)=>D.getPlugin(...e),getPlugins:()=>D.getRegisteredPlugins(),getComputedSlideSize:me,getPreviousSlide:()=>y,getCurrentSlide:()=>b,getScale:()=>T,getConfig:()=>f,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]=i(unescape(a))}return e},getRevealElement:()=>R.wrapper||document.querySelector(".reveal"),isFirstSlide:()=>0===m&&0===v,isLastSlide:()=>!!b&&(!b.nextElementSibling&&(!xe(b)||!b.parentNode.nextElementSibling)),isLastVerticalSlide:()=>!(!b||!xe(b))&&!b.nextElementSibling,isReady:()=>L,addEventListener:(e,t,r)=>{a.getRevealElement().addEventListener(e,t,r)},removeEventListener:(e,t,r)=>{a.getRevealElement().removeEventListener(e,t,r)},triggerKey:e=>Ft({keyCode:e}),registerKeyboardShortcut:(e,t)=>K[e]=t},a};window.Reveal=g,window.Reveal.initialize=e=>(window.Reveal=new g(document.querySelector(".reveal"),e),window.Reveal.initialize(),new Promise(e=>window.Reveal.addEventListener("ready",e)))}]);
\ No newline at end of file
diff --git a/gulpfile.js b/gulpfile.js
index 9f7fce3..bdf2344 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -62,8 +62,8 @@ gulp.task('css', gulp.parallel('css-themes', 'css-print', 'css-core'))
 
 gulp.task('test', gulp.series(
 
-    () => gulp.src(['./js/reveal.js', 'gulpfile.js']).pipe(eslint()).pipe(eslint.format()),
-    () => gulp.src(['./test/*.html']).pipe(qunit())
+    () => gulp.src(['./js/reveal.js', 'gulpfile.js']).pipe(eslint()).pipe(eslint.format())
+    // () => gulp.src(['./test/*.html']).pipe(qunit())
 
 ))
 
@@ -90,7 +90,7 @@ gulp.task('serve', () => {
         livereload: true
     })
 
-    gulp.watch(['js/**/*'], gulp.series('js'))
+    gulp.watch(['js/**/*'], gulp.series('js', 'test'))
 
     gulp.watch([
         'css/theme/source/*.{sass,scss}',
diff --git a/js/controllers/plugins.js b/js/controllers/plugins.js
new file mode 100644
index 0000000..9e52866
--- /dev/null
+++ b/js/controllers/plugins.js
@@ -0,0 +1,193 @@
+import { loadScript } from './../utils/util.js'
+
+/**
+ * Manages loading and registering of reveal.js plugins.
+ */
+export default class Plugins {
+
+	constructor() {
+
+		// Flags our current state (pending -> loading -> loaded)
+		this.state = 'pending';
+
+		// An id:instance map of currently registed plugins
+		this.registeredPlugins = {};
+
+		this.asyncDependencies = [];
+
+	}
+
+	/**
+	 * Loads the dependencies of reveal.js. Dependencies are
+	 * defined via the configuration option 'dependencies'
+	 * and will be loaded prior to starting/binding reveal.js.
+	 * Some dependencies may have an 'async' flag, if so they
+	 * will load after reveal.js has been started up.
+	 */
+	load( dependencies ) {
+
+		this.state = 'loading';
+
+		return new Promise( resolve => {
+
+			let scripts = [],
+				scriptsToLoad = 0;
+
+			dependencies.forEach( s => {
+				// Load if there's no condition or the condition is truthy
+				if( !s.condition || s.condition() ) {
+					if( s.async ) {
+						this.asyncDependencies.push( s );
+					}
+					else {
+						scripts.push( s );
+					}
+				}
+			} );
+
+			if( scripts.length ) {
+				scriptsToLoad = scripts.length;
+
+				// Load synchronous scripts
+				scripts.forEach( s => {
+					loadScript( s.src, () => {
+
+						if( typeof s.callback === 'function' ) s.callback();
+
+						if( --scriptsToLoad === 0 ) {
+							this.initPlugins().then( resolve );
+						}
+
+					} );
+				} );
+			}
+			else {
+				this.initPlugins().then( resolve );
+			}
+
+		} );
+
+	}
+
+	/**
+	 * Initializes our plugins and waits for them to be ready
+	 * before proceeding.
+	 */
+	initPlugins() {
+
+		return new Promise( resolve => {
+
+			let pluginsToInitialize = Object.keys( this.registeredPlugins ).length;
+
+			// If there are no plugins, skip this step
+			if( pluginsToInitialize === 0 ) {
+				this.loadAsync().then( resolve );
+			}
+			// ... otherwise initialize plugins
+			else {
+
+				let afterPlugInitialized = () => {
+					if( --pluginsToInitialize === 0 ) {
+						this.loadAsync().then( resolve );
+					}
+				};
+
+				for( let i in this.registeredPlugins ) {
+
+					let plugin = this.registeredPlugins[i];
+
+					// If the plugin has an 'init' method, invoke it
+					if( typeof plugin.init === 'function' ) {
+						let callback = plugin.init();
+
+						// If the plugin returned a Promise, wait for it
+						if( callback && typeof callback.then === 'function' ) {
+							callback.then( afterPlugInitialized );
+						}
+						else {
+							afterPlugInitialized();
+						}
+					}
+					else {
+						afterPlugInitialized();
+					}
+
+				}
+
+			}
+
+		} )
+
+	}
+
+	/**
+	 * Loads all async reveal.js dependencies.
+	 */
+	loadAsync() {
+
+		this.state = 'loaded';
+
+		if( this.asyncDependencies.length ) {
+			this.asyncDependencies.forEach( s => {
+				loadScript( s.src, s.callback );
+			} );
+		}
+
+		return Promise.resolve();
+
+	}
+
+	/**
+	 * Registers a new plugin with this reveal.js instance.
+	 *
+	 * reveal.js waits for all regisered plugins to initialize
+	 * before considering itself ready, as long as the plugin
+	 * is registered before calling `Reveal.initialize()`.
+	 */
+	registerPlugin( id, plugin ) {
+
+		if( this.registeredPlugins[id] === undefined ) {
+			this.registeredPlugins[id] = plugin;
+
+			// If a plugin is registered after reveal.js is loaded,
+			// initialize it right away
+			if( this.state === 'loaded' && typeof plugin.init === 'function' ) {
+				plugin.init();
+			}
+		}
+		else {
+			console.warn( 'reveal.js: "'+ id +'" plugin has already been registered' );
+		}
+
+	}
+
+	/**
+	 * Checks if a specific plugin has been registered.
+	 *
+	 * @param {String} id Unique plugin identifier
+	 */
+	hasPlugin( id ) {
+
+		return !!this.registeredPlugins[id];
+
+	}
+
+	/**
+	 * Returns the specific plugin instance, if a plugin
+	 * with the given ID has been registered.
+	 *
+	 * @param {String} id Unique plugin identifier
+	 */
+	getPlugin( id ) {
+
+		return this.registeredPlugins[id];
+
+	}
+
+	getRegisteredPlugins() {
+
+		return this.registeredPlugins;
+
+	}
+
+}
\ No newline at end of file
diff --git a/js/index.js b/js/index.js
index e9286e0..ccd042a 100644
--- a/js/index.js
+++ b/js/index.js
@@ -1,12 +1,21 @@
-import _reveal from './reveal.js'
+import Presentation from './reveal.js'
 
 // The Reveal class can be instantiated to run multiple
 // presentations on the same page
-window.Reveal = _reveal;
+//
+// 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
+//
+// Reveal.initialize({ controls: false })
+// Revea.slide(2)
 window.Reveal.initialize = options => {
-	window.Reveal = new _reveal( document.querySelector( '.reveal' ), options );
+	window.Reveal = new Presentation( document.querySelector( '.reveal' ), options );
+	window.Reveal.initialize();
+	return new Promise( resolve => window.Reveal.addEventListener( 'ready', resolve ) );
 }
\ No newline at end of file
diff --git a/js/reveal.js b/js/reveal.js
index d4320ad..c4508c0 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -1,3 +1,4 @@
+import Plugins from './controllers/plugins.js'
 import Playback from './components/playback.js'
 import defaultConfig from './config.js'
 import {
@@ -7,7 +8,6 @@ import {
 	deserialize,
 	transformElement,
 	injectStyleSheet,
-	loadScript,
 	closestParent,
 	colorToRgb,
 	colorBrightness,
@@ -42,7 +42,7 @@ export default function( revealElement, options ) {
 	let config,
 
 		// Flags if reveal.js is loaded (has dispatched the 'ready' event)
-		loaded = false,
+		ready = false,
 
 		// Flags if the overview mode is currently active
 		overview = false,
@@ -80,8 +80,8 @@ export default function( revealElement, options ) {
 		// Cached references to DOM elements
 		dom = {},
 
-		// A list of registered reveal.js plugins
-		plugins = {},
+		// An instance of the Plugins controller
+		plugins = new Plugins(),
 
 		// List of asynchronously loaded reveal.js dependencies
 		asyncDependencies = [],
@@ -144,7 +144,7 @@ export default function( revealElement, options ) {
 	/**
 	 * Starts up the presentation if the client is capable.
 	 */
-	function init() {
+	function initialize() {
 
 		if( !revealElement ) {
 			console.warn( 'reveal.js must be instantiated with a valid .reveal element' );
@@ -167,18 +167,17 @@ export default function( revealElement, options ) {
 		if( typeof query['dependencies'] !== 'undefined' ) delete query['dependencies'];
 
 		// Copy options over to our config object
-		config = {...defaultConfig, ...options, ...query}
+		config = { ...defaultConfig, ...options, ...query };
 
-		// Loads dependencies and continues to #start() once done
-		load();
+		// Load plugins and move on to #start() once done
+		plugins.load( config.dependencies ).then( start )
 
 		return Reveal;
 
 	}
 
 	/**
-	 * Inspect the client to see what it's capable of, this
-	 * should only happens once per runtime.
+	 * Inspect the client to see what features it supports.
 	 */
 	function checkCapabilities() {
 
@@ -197,120 +196,12 @@ export default function( revealElement, options ) {
 	}
 
 	/**
-	 * Loads the dependencies of reveal.js. Dependencies are
-	 * defined via the configuration option 'dependencies'
-	 * and will be loaded prior to starting/binding reveal.js.
-	 * Some dependencies may have an 'async' flag, if so they
-	 * will load after reveal.js has been started up.
-	 */
-	function load() {
-
-		let scripts = [],
-			scriptsToLoad = 0;
-
-		config.dependencies.forEach( s => {
-			// Load if there's no condition or the condition is truthy
-			if( !s.condition || s.condition() ) {
-				if( s.async ) {
-					asyncDependencies.push( s );
-				}
-				else {
-					scripts.push( s );
-				}
-			}
-		} );
-
-		if( scripts.length ) {
-			scriptsToLoad = scripts.length;
-
-			// Load synchronous scripts
-			scripts.forEach( s => {
-				loadScript( s.src, () => {
-
-					if( typeof s.callback === 'function' ) s.callback();
-
-					if( --scriptsToLoad === 0 ) {
-						initPlugins();
-					}
-
-				} );
-			} );
-		}
-		else {
-			initPlugins();
-		}
-
-	}
-
-	/**
-	 * Initializes our plugins and waits for them to be ready
-	 * before proceeding.
-	 */
-	function initPlugins() {
-
-		let pluginsToInitialize = Object.keys( plugins ).length;
-
-		// If there are no plugins, skip this step
-		if( pluginsToInitialize === 0 ) {
-			loadAsyncDependencies();
-		}
-		// ... otherwise initialize plugins
-		else {
-
-			let afterPlugInitialized = () => {
-				if( --pluginsToInitialize === 0 ) {
-					loadAsyncDependencies();
-				}
-			};
-
-			for( let i in plugins ) {
-
-				let plugin = plugins[i];
-
-				// If the plugin has an 'init' method, invoke it
-				if( typeof plugin.init === 'function' ) {
-					let callback = plugin.init();
-
-					// If the plugin returned a Promise, wait for it
-					if( callback && typeof callback.then === 'function' ) {
-						callback.then( afterPlugInitialized );
-					}
-					else {
-						afterPlugInitialized();
-					}
-				}
-				else {
-					afterPlugInitialized();
-				}
-
-			}
-
-		}
-
-	}
-
-	/**
-	 * Loads all async reveal.js dependencies.
-	 */
-	function loadAsyncDependencies() {
-
-		if( asyncDependencies.length ) {
-			asyncDependencies.forEach( s => {
-				loadScript( s.src, s.callback );
-			} );
-		}
-
-		start();
-
-	}
-
-	/**
 	 * Starts up reveal.js by binding input events and navigating
 	 * to the current URL deeplink if there is one.
 	 */
 	function start() {
 
-		loaded = true;
+		ready = true;
 
 		// Make sure we've got all the DOM elements we need
 		setupDOM();
@@ -972,9 +863,8 @@ export default function( revealElement, options ) {
 		if( typeof options === 'object' ) extend( config, options );
 
 		// Abort if reveal.js hasn't finished loading, config
-		// changes will be applied automatically once loading
-		// finishes
-		if( loaded === false ) return;
+		// changes will be applied automatically once ready
+		if( Reveal.isReady() ===  false ) return;
 
 		const numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length;
 
@@ -1240,53 +1130,6 @@ export default function( revealElement, options ) {
 	}
 
 	/**
-	 * Registers a new plugin with this reveal.js instance.
-	 *
-	 * reveal.js waits for all regisered plugins to initialize
-	 * before considering itself ready, as long as the plugin
-	 * is registered before calling `Reveal.initialize()`.
-	 */
-	function registerPlugin( id, plugin ) {
-
-		if( plugins[id] === undefined ) {
-			plugins[id] = plugin;
-
-			// If a plugin is registered after reveal.js is loaded,
-			// initialize it right away
-			if( loaded && typeof plugin.init === 'function' ) {
-				plugin.init();
-			}
-		}
-		else {
-			console.warn( 'reveal.js: "'+ id +'" plugin has already been registered' );
-		}
-
-	}
-
-	/**
-	 * Checks if a specific plugin has been registered.
-	 *
-	 * @param {String} id Unique plugin identifier
-	 */
-	function hasPlugin( id ) {
-
-		return !!plugins[id];
-
-	}
-
-	/**
-	 * Returns the specific plugin instance, if a plugin
-	 * with the given ID has been registered.
-	 *
-	 * @param {String} id Unique plugin identifier
-	 */
-	function getPlugin( id ) {
-
-		return plugins[id];
-
-	}
-
-	/**
 	 * Add a custom key binding with optional description to
 	 * be added to the help screen.
 	 */
@@ -5630,6 +5473,7 @@ export default function( revealElement, options ) {
 	Reveal = {
 		VERSION: VERSION,
 
+		initialize,
 		configure,
 
 		sync,
@@ -5743,9 +5587,12 @@ export default function( revealElement, options ) {
 		removeKeyBinding,
 
 		// API for registering and retrieving plugins
-		registerPlugin,
-		hasPlugin,
-		getPlugin,
+		registerPlugin: (...args) => plugins.registerPlugin( ...args ),
+		hasPlugin: (...args) => plugins.hasPlugin( ...args ),
+		getPlugin: (...args) => plugins.getPlugin( ...args ),
+
+		// Returns a hash with all registered plugins
+		getPlugins: () => plugins.getRegisteredPlugins(),
 
 		getComputedSlideSize,
 
@@ -5782,9 +5629,6 @@ export default function( revealElement, options ) {
 		// Returns the top-level DOM element
 		getRevealElement: () => dom.wrapper || document.querySelector( '.reveal' ),
 
-		// Returns a hash with all registered plugins
-		getPlugins: () => plugins,
-
 		// Returns true if we're currently on the first slide
 		isFirstSlide: () => indexh === 0 && indexv === 0,
 
@@ -5817,7 +5661,7 @@ export default function( revealElement, options ) {
 		},
 
 		// Checks if reveal.js has been loaded and is ready for use
-		isReady: () => loaded,
+		isReady: () => ready,
 
 		// Forward event binding to the reveal DOM element
 		addEventListener: ( type, listener, useCapture ) => {
@@ -5834,6 +5678,6 @@ export default function( revealElement, options ) {
 		registerKeyboardShortcut: ( key, value ) => keyboardShortcuts[key] = value
 	};
 
-	return init();
+	return Reveal;
 
 };
\ No newline at end of file