add fit-text to demo

Fix URL to pdf-export documentation

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: [hakimel]

.github/workflows/js.yml

@@ -0,0 +1,24 @@
+name: tests
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 14.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm run build --if-present
+    - run: npm test
+      env:
+        CI: true

.gitignore

@@ -9,5 +9,4 @@ log/*.log
 tmp/**
 node_modules/
 .sass-cache
-css/reveal.min.css
-js/reveal.min.js
+dist/*.map

.npmignore

@@ -0,0 +1,7 @@
+/test
+/examples
+.github
+.gulpfile
+.sass-cache
+gulpfile.js
+CONTRIBUTING.md

.travis.yml

@@ -1,5 +0,0 @@
-language: node_js
-node_js:
-  - 4.1.1
-before_script:
-  - npm install -g grunt-cli

Gruntfile.js

@@ -1,176 +0,0 @@
-/* global module:false */
-module.exports = function(grunt) {
-	var port = grunt.option('port') || 8000;
-	var base = grunt.option('base') || '.';
-
-	// Project configuration
-	grunt.initConfig({
-		pkg: grunt.file.readJSON('package.json'),
-		meta: {
-			banner:
-				'/*!\n' +
-				' * reveal.js <%= pkg.version %> (<%= grunt.template.today("yyyy-mm-dd, HH:MM") %>)\n' +
-				' * http://lab.hakim.se/reveal-js\n' +
-				' * MIT licensed\n' +
-				' *\n' +
-				' * Copyright (C) 2016 Hakim El Hattab, http://hakim.se\n' +
-				' */'
-		},
-
-		qunit: {
-			files: [ 'test/*.html' ]
-		},
-
-		uglify: {
-			options: {
-				banner: '<%= meta.banner %>\n'
-			},
-			build: {
-				src: 'js/reveal.js',
-				dest: 'js/reveal.min.js'
-			}
-		},
-
-		sass: {
-			core: {
-				files: {
-					'css/reveal.css': 'css/reveal.scss',
-				}
-			},
-			themes: {
-				files: [
-					{
-						expand: true,
-						cwd: 'css/theme/source',
-						src: ['*.scss'],
-						dest: 'css/theme',
-						ext: '.css'
-					}
-				]
-			}
-		},
-
-		autoprefixer: {
-			dist: {
-				src: 'css/reveal.css'
-			}
-		},
-
-		cssmin: {
-			compress: {
-				files: {
-					'css/reveal.min.css': [ 'css/reveal.css' ]
-				}
-			}
-		},
-
-		jshint: {
-			options: {
-				curly: false,
-				eqeqeq: true,
-				immed: true,
-				latedef: true,
-				newcap: true,
-				noarg: true,
-				sub: true,
-				undef: true,
-				eqnull: true,
-				browser: true,
-				expr: true,
-				globals: {
-					head: false,
-					module: false,
-					console: false,
-					unescape: false,
-					define: false,
-					exports: false
-				}
-			},
-			files: [ 'Gruntfile.js', 'js/reveal.js' ]
-		},
-
-		connect: {
-			server: {
-				options: {
-					port: port,
-					base: base,
-					livereload: true,
-					open: true
-				}
-			}
-		},
-
-		zip: {
-			'reveal-js-presentation.zip': [
-				'index.html',
-				'css/**',
-				'js/**',
-				'lib/**',
-				'images/**',
-				'plugin/**',
-				'**.md'
-			]
-		},
-
-		watch: {
-			js: {
-				files: [ 'Gruntfile.js', 'js/reveal.js' ],
-				tasks: 'js'
-			},
-			theme: {
-				files: [ 'css/theme/source/*.scss', 'css/theme/template/*.scss' ],
-				tasks: 'css-themes'
-			},
-			css: {
-				files: [ 'css/reveal.scss' ],
-				tasks: 'css-core'
-			},
-			html: {
-				files: [ '*.html']
-			},
-			markdown: {
-				files: [ '*.md' ]
-			},
-			options: {
-				livereload: true
-			}
-		}
-
-	});
-
-	// Dependencies
-	grunt.loadNpmTasks( 'grunt-contrib-qunit' );
-	grunt.loadNpmTasks( 'grunt-contrib-jshint' );
-	grunt.loadNpmTasks( 'grunt-contrib-cssmin' );
-	grunt.loadNpmTasks( 'grunt-contrib-uglify' );
-	grunt.loadNpmTasks( 'grunt-contrib-watch' );
-	grunt.loadNpmTasks( 'grunt-sass' );
-	grunt.loadNpmTasks( 'grunt-contrib-connect' );
-	grunt.loadNpmTasks( 'grunt-autoprefixer' );
-	grunt.loadNpmTasks( 'grunt-zip' );
-
-	// Default task
-	grunt.registerTask( 'default', [ 'css', 'js' ] );
-
-	// JS task
-	grunt.registerTask( 'js', [ 'jshint', 'uglify', 'qunit' ] );
-
-	// Theme CSS
-	grunt.registerTask( 'css-themes', [ 'sass:themes' ] );
-
-	// Core framework CSS
-	grunt.registerTask( 'css-core', [ 'sass:core', 'autoprefixer', 'cssmin' ] );
-
-	// All CSS
-	grunt.registerTask( 'css', [ 'sass', 'autoprefixer', 'cssmin' ] );
-
-	// Package presentation to archive
-	grunt.registerTask( 'package', [ 'default', 'zip' ] );
-
-	// Serve presentation locally
-	grunt.registerTask( 'serve', [ 'connect', 'watch' ] );
-
-	// Run tests
-	grunt.registerTask( 'test', [ 'jshint', 'qunit' ] );
-
-};

LICENSE

@@ -1,4 +1,4 @@
-Copyright (C) 2016 Hakim El Hattab, http://hakim.se
+Copyright (C) 2020 Hakim El Hattab, http://hakim.se, and reveal.js contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

bower.json

@@ -1,27 +0,0 @@
-{
-  "name": "reveal.js",
-  "version": "3.3.0",
-  "main": [
-    "js/reveal.js",
-    "css/reveal.css"
-  ],
-  "homepage": "http://lab.hakim.se/reveal-js/",
-  "license": "MIT",
-  "description": "The HTML Presentation Framework",
-  "authors": [
-    "Hakim El Hattab <hakim.elhattab@gmail.com>"
-  ],
-  "dependencies": {
-    "headjs": "~1.0.3"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git://github.com/hakimel/reveal.js.git"
-  },
-  "ignore": [
-    "**/.*",
-    "node_modules",
-    "bower_components",
-    "test"
-  ]
-}

css/layout.scss

@@ -0,0 +1,69 @@
+/**
+ * Layout helpers.
+ */
+
+// Stretch an element vertically based on available space
+.reveal .stretch,
+.reveal .r-stretch {
+	max-width: none;
+	max-height: none;
+}
+
+.reveal pre.stretch code,
+.reveal pre.r-stretch code {
+	height: 100%;
+	max-height: 100%;
+	box-sizing: border-box;
+}
+
+// Text that auto-fits it's container
+.reveal .r-fit-text {
+	display: inline-block; // https://github.com/rikschennink/fitty#performance
+	white-space: nowrap;
+}
+
+// Stack multiple elements on top of each other
+.reveal .r-stack {
+	display: grid;
+}
+
+.reveal .r-stack > * {
+	grid-area: 1/1;
+	margin: auto;
+}
+
+// Horizontal and vertical stacks
+.reveal .r-vstack,
+.reveal .r-hstack {
+	display: flex;
+
+	img, video {
+		min-width: 0;
+		min-height: 0;
+		object-fit: contain;
+	}
+}
+
+.reveal .r-vstack {
+	flex-direction: column;
+	align-items: center;
+	justify-content: center;
+}
+
+.reveal .r-hstack {
+	flex-direction: row;
+	align-items: center;
+	justify-content: center;
+}
+
+// Naming based on tailwindcss
+.reveal .items-stretch { align-items: stretch; }
+.reveal .items-start { align-items: flex-start; }
+.reveal .items-center { align-items: center; }
+.reveal .items-end { align-items: flex-end; }
+
+.reveal .justify-between { justify-content: space-between; }
+.reveal .justify-around { justify-content: space-around; }
+.reveal .justify-start { justify-content: flex-start; }
+.reveal .justify-center { justify-content: center; }
+.reveal .justify-end { justify-content: flex-end; }

css/print/paper.css

@@ -1,202 +0,0 @@
-/* Default Print Stylesheet Template
-   by Rob Glazebrook of CSSnewbie.com
-   Last Updated: June 4, 2008
-
-   Feel free (nay, compelled) to edit, append, and
-   manipulate this file as you see fit. */
-
-
-@media print {
-
-	/* SECTION 1: Set default width, margin, float, and
-	   background. This prevents elements from extending
-	   beyond the edge of the printed page, and prevents
-	   unnecessary background images from printing */
-	html {
-		background: #fff;
-		width: auto;
-		height: auto;
-		overflow: visible;
-	}
-	body {
-		background: #fff;
-		font-size: 20pt;
-		width: auto;
-		height: auto;
-		border: 0;
-		margin: 0 5%;
-		padding: 0;
-		overflow: visible;
-		float: none !important;
-	}
-
-	/* SECTION 2: Remove any elements not needed in print.
-	   This would include navigation, ads, sidebars, etc. */
-	.nestedarrow,
-	.controls,
-	.fork-reveal,
-	.share-reveal,
-	.state-background,
-	.reveal .progress,
-	.reveal .backgrounds {
-		display: none !important;
-	}
-
-	/* SECTION 3: Set body font face, size, and color.
-	   Consider using a serif font for readability. */
-	body, p, td, li, div {
-		font-size: 20pt!important;
-		font-family: Georgia, "Times New Roman", Times, serif !important;
-		color: #000;
-	}
-
-	/* SECTION 4: Set heading font face, sizes, and color.
-	   Differentiate your headings from your body text.
-	   Perhaps use a large sans-serif for distinction. */
-	h1,h2,h3,h4,h5,h6 {
-		color: #000!important;
-		height: auto;
-		line-height: normal;
-		font-family: Georgia, "Times New Roman", Times, serif !important;
-		text-shadow: 0 0 0 #000 !important;
-		text-align: left;
-		letter-spacing: normal;
-	}
-	/* Need to reduce the size of the fonts for printing */
-	h1 { font-size: 28pt !important;  }
-	h2 { font-size: 24pt !important; }
-	h3 { font-size: 22pt !important; }
-	h4 { font-size: 22pt !important; font-variant: small-caps; }
-	h5 { font-size: 21pt !important; }
-	h6 { font-size: 20pt !important; font-style: italic; }
-
-	/* SECTION 5: Make hyperlinks more usable.
-	   Ensure links are underlined, and consider appending
-	   the URL to the end of the link for usability. */
-	a:link,
-	a:visited {
-		color: #000 !important;
-		font-weight: bold;
-		text-decoration: underline;
-	}
-	/*
-	.reveal a:link:after,
-	.reveal a:visited:after {
-		content: " (" attr(href) ") ";
-		color: #222 !important;
-		font-size: 90%;
-	}
-	*/
-
-
-	/* SECTION 6: more reveal.js specific additions by @skypanther */
-	ul, ol, div, p {
-		visibility: visible;
-		position: static;
-		width: auto;
-		height: auto;
-		display: block;
-		overflow: visible;
-		margin: 0;
-		text-align: left !important;
-	}
-	.reveal pre,
-	.reveal table {
-		margin-left: 0;
-		margin-right: 0;
-	}
-	.reveal pre code {
-		padding: 20px;
-		border: 1px solid #ddd;
-	}
-	.reveal blockquote {
-		margin: 20px 0;
-	}
-	.reveal .slides {
-		position: static !important;
-		width: auto !important;
-		height: auto !important;
-
-		left: 0 !important;
-		top: 0 !important;
-		margin-left: 0 !important;
-		margin-top: 0 !important;
-		padding: 0 !important;
-		zoom: 1 !important;
-
-		overflow: visible !important;
-		display: block !important;
-
-		text-align: left !important;
-		-webkit-perspective: none;
-		   -moz-perspective: none;
-		    -ms-perspective: none;
-		        perspective: none;
-
-		-webkit-perspective-origin: 50% 50%;
-		   -moz-perspective-origin: 50% 50%;
-		    -ms-perspective-origin: 50% 50%;
-		        perspective-origin: 50% 50%;
-	}
-	.reveal .slides section {
-		visibility: visible !important;
-		position: static !important;
-		width: auto !important;
-		height: auto !important;
-		display: block !important;
-		overflow: visible !important;
-
-		left: 0 !important;
-		top: 0 !important;
-		margin-left: 0 !important;
-		margin-top: 0 !important;
-		padding: 60px 20px !important;
-		z-index: auto !important;
-
-		opacity: 1 !important;
-
-		page-break-after: always !important;
-
-		-webkit-transform-style: flat !important;
-		   -moz-transform-style: flat !important;
-		    -ms-transform-style: flat !important;
-		        transform-style: flat !important;
-
-		-webkit-transform: none !important;
-		   -moz-transform: none !important;
-		    -ms-transform: none !important;
-		        transform: none !important;
-
-		-webkit-transition: none !important;
-		   -moz-transition: none !important;
-		    -ms-transition: none !important;
-		        transition: none !important;
-	}
-	.reveal .slides section.stack {
-		padding: 0 !important;
-	}
-	.reveal section:last-of-type {
-		page-break-after: avoid !important;
-	}
-	.reveal section .fragment {
-		opacity: 1 !important;
-		visibility: visible !important;
-
-		-webkit-transform: none !important;
-		   -moz-transform: none !important;
-		    -ms-transform: none !important;
-		        transform: none !important;
-	}
-	.reveal section img {
-		display: block;
-		margin: 15px 0px;
-		background: rgba(255,255,255,1);
-		border: 1px solid #666;
-		box-shadow: none;
-	}
-
-	.reveal section small {
-		font-size: 0.8em;
-	}
-
-}

css/print/paper.scss

@@ -0,0 +1,173 @@
+/* Default Print Stylesheet Template
+   by Rob Glazebrook of CSSnewbie.com
+   Last Updated: June 4, 2008
+
+   Feel free (nay, compelled) to edit, append, and
+   manipulate this file as you see fit. */
+
+@media print {
+	html:not(.print-pdf) {
+
+		background: #fff;
+		width: auto;
+		height: auto;
+		overflow: visible;
+
+		body {
+			background: #fff;
+			font-size: 20pt;
+			width: auto;
+			height: auto;
+			border: 0;
+			margin: 0 5%;
+			padding: 0;
+			overflow: visible;
+			float: none !important;
+		}
+
+		.nestedarrow,
+		.controls,
+		.fork-reveal,
+		.share-reveal,
+		.state-background,
+		.reveal .progress,
+		.reveal .backgrounds,
+		.reveal .slide-number {
+			display: none !important;
+		}
+
+		body, p, td, li {
+			font-size: 20pt!important;
+			color: #000;
+		}
+
+		h1,h2,h3,h4,h5,h6 {
+			color: #000!important;
+			height: auto;
+			line-height: normal;
+			text-align: left;
+			letter-spacing: normal;
+		}
+
+		/* Need to reduce the size of the fonts for printing */
+		h1 { font-size: 28pt !important; }
+		h2 { font-size: 24pt !important; }
+		h3 { font-size: 22pt !important; }
+		h4 { font-size: 22pt !important; font-variant: small-caps; }
+		h5 { font-size: 21pt !important; }
+		h6 { font-size: 20pt !important; font-style: italic; }
+
+		a:link,
+		a:visited {
+			color: #000 !important;
+			font-weight: bold;
+			text-decoration: underline;
+		}
+
+		ul, ol, div, p {
+			visibility: visible;
+			position: static;
+			width: auto;
+			height: auto;
+			display: block;
+			overflow: visible;
+			margin: 0;
+			text-align: left !important;
+		}
+		.reveal pre,
+		.reveal table {
+			margin-left: 0;
+			margin-right: 0;
+		}
+		.reveal pre code {
+			padding: 20px;
+		}
+		.reveal blockquote {
+			margin: 20px 0;
+		}
+		.reveal .slides {
+			position: static !important;
+			width: auto !important;
+			height: auto !important;
+
+			left: 0 !important;
+			top: 0 !important;
+			margin-left: 0 !important;
+			margin-top: 0 !important;
+			padding: 0 !important;
+			zoom: 1 !important;
+			transform: none !important;
+
+			overflow: visible !important;
+			display: block !important;
+
+			text-align: left !important;
+			perspective: none;
+
+			perspective-origin: 50% 50%;
+		}
+		.reveal .slides section {
+			visibility: visible !important;
+			position: static !important;
+			width: auto !important;
+			height: auto !important;
+			display: block !important;
+			overflow: visible !important;
+
+			left: 0 !important;
+			top: 0 !important;
+			margin-left: 0 !important;
+			margin-top: 0 !important;
+			padding: 60px 20px !important;
+			z-index: auto !important;
+
+			opacity: 1 !important;
+
+			page-break-after: always !important;
+
+			transform-style: flat !important;
+			transform: none !important;
+			transition: none !important;
+		}
+		.reveal .slides section.stack {
+			padding: 0 !important;
+		}
+		.reveal section:last-of-type {
+			page-break-after: avoid !important;
+		}
+		.reveal section .fragment {
+			opacity: 1 !important;
+			visibility: visible !important;
+
+			transform: none !important;
+		}
+		.reveal section img {
+			display: block;
+			margin: 15px 0px;
+			background: rgba(255,255,255,1);
+			border: 1px solid #666;
+			box-shadow: none;
+		}
+
+		.reveal section small {
+			font-size: 0.8em;
+		}
+
+		.reveal .hljs {
+			max-height: 100%;
+			white-space: pre-wrap;
+			word-wrap: break-word;
+			word-break: break-word;
+			font-size: 15pt;
+		}
+
+		.reveal .hljs .hljs-ln-numbers {
+			white-space: nowrap;
+		}
+
+		.reveal .hljs td {
+			font-size: inherit !important;
+			color: inherit !important;
+		}
+	}
+}

css/print/pdf.css

@@ -1,160 +0,0 @@
-/**
- * This stylesheet is used to print reveal.js
- * presentations to PDF.
- *
- * https://github.com/hakimel/reveal.js#pdf-export
- */
-
-* {
-	-webkit-print-color-adjust: exact;
-}
-
-body {
-	margin: 0 auto !important;
-	border: 0;
-	padding: 0;
-	float: none !important;
-	overflow: visible;
-}
-
-html {
-	width: 100%;
-	height: 100%;
-	overflow: visible;
-}
-
-/* Remove any elements not needed in print. */
-.nestedarrow,
-.reveal .controls,
-.reveal .progress,
-.reveal .playback,
-.reveal.overview,
-.fork-reveal,
-.share-reveal,
-.state-background {
-	display: none !important;
-}
-
-h1, h2, h3, h4, h5, h6 {
-	text-shadow: 0 0 0 #000 !important;
-}
-
-.reveal pre code {
-	overflow: hidden !important;
-	font-family: Courier, 'Courier New', monospace !important;
-}
-
-ul, ol, div, p {
-	visibility: visible;
-	position: static;
-	width: auto;
-	height: auto;
-	display: block;
-	overflow: visible;
-	margin: auto;
-}
-.reveal {
-	width: auto !important;
-	height: auto !important;
-	overflow: hidden !important;
-}
-.reveal .slides {
-	position: static;
-	width: 100%;
-	height: auto;
-
-	left: auto;
-	top: auto;
-	margin: 0 !important;
-	padding: 0 !important;
-
-	overflow: visible;
-	display: block;
-
-	-webkit-perspective: none;
-	   -moz-perspective: none;
-	    -ms-perspective: none;
-	        perspective: none;
-
-	-webkit-perspective-origin: 50% 50%; /* there isn't a none/auto value but 50-50 is the default */
-	   -moz-perspective-origin: 50% 50%;
-	    -ms-perspective-origin: 50% 50%;
-	        perspective-origin: 50% 50%;
-}
-
-.reveal .slides section {
-	page-break-after: always !important;
-
-	visibility: visible !important;
-	position: relative !important;
-	display: block !important;
-	position: relative !important;
-
-	margin: 0 !important;
-	padding: 0 !important;
-	box-sizing: border-box !important;
-	min-height: 1px;
-
-	opacity: 1 !important;
-
-	-webkit-transform-style: flat !important;
-	   -moz-transform-style: flat !important;
-	    -ms-transform-style: flat !important;
-	        transform-style: flat !important;
-
-	-webkit-transform: none !important;
-	   -moz-transform: none !important;
-	    -ms-transform: none !important;
-	        transform: none !important;
-}
-
-.reveal section.stack {
-	margin: 0 !important;
-	padding: 0 !important;
-	page-break-after: avoid !important;
-	height: auto !important;
-	min-height: auto !important;
-}
-
-.reveal img {
-	box-shadow: none;
-}
-
-.reveal .roll {
-	overflow: visible;
-	line-height: 1em;
-}
-
-/* Slide backgrounds are placed inside of their slide when exporting to PDF */
-.reveal section .slide-background {
-	display: block !important;
-	position: absolute;
-	top: 0;
-	left: 0;
-	width: 100%;
-	z-index: -1;
-}
-
-/* All elements should be above the slide-background */
-.reveal section>* {
-	position: relative;
-	z-index: 1;
-}
-
-/* Display slide speaker notes when 'showNotes' is enabled */
-.reveal .speaker-notes-pdf {
-	display: block;
-	width: 100%;
-	max-height: none;
-	left: auto;
-	top: auto;
-	z-index: 100;
-}
-
-/* Display slide numbers when 'slideNumber' is enabled */
-.reveal .slide-number-pdf {
-	display: block;
-	position: absolute;
-	font-size: 14px;
-}
-

css/print/pdf.scss

@@ -0,0 +1,156 @@
+/**
+ * This stylesheet is used to print reveal.js
+ * presentations to PDF.
+ *
+ * https://revealjs.com/pdf-export/
+ */
+
+html.print-pdf {
+	* {
+		-webkit-print-color-adjust: exact;
+	}
+
+	& {
+		width: 100%;
+		height: 100%;
+		overflow: visible;
+	}
+
+	body {
+		margin: 0 auto !important;
+		border: 0;
+		padding: 0;
+		float: none !important;
+		overflow: visible;
+	}
+
+	/* Remove any elements not needed in print. */
+	.nestedarrow,
+	.reveal .controls,
+	.reveal .progress,
+	.reveal .playback,
+	.reveal.overview,
+	.state-background {
+		display: none !important;
+	}
+
+	.reveal pre code {
+		overflow: hidden !important;
+		font-family: Courier, 'Courier New', monospace !important;
+	}
+
+	.reveal {
+		width: auto !important;
+		height: auto !important;
+		overflow: hidden !important;
+	}
+	.reveal .slides {
+		position: static;
+		width: 100% !important;
+		height: auto !important;
+		zoom: 1 !important;
+		pointer-events: initial;
+
+		left: auto;
+		top: auto;
+		margin: 0 !important;
+		padding: 0 !important;
+
+		overflow: visible;
+		display: block;
+
+		perspective: none;
+		perspective-origin: 50% 50%;
+	}
+
+	.reveal .slides .pdf-page {
+		position: relative;
+		overflow: hidden;
+		z-index: 1;
+
+		page-break-after: always;
+	}
+
+	.reveal .slides section {
+		visibility: visible !important;
+		display: block !important;
+		position: absolute !important;
+
+		margin: 0 !important;
+		padding: 0 !important;
+		box-sizing: border-box !important;
+		min-height: 1px;
+
+		opacity: 1 !important;
+
+		transform-style: flat !important;
+		transform: none !important;
+	}
+
+	.reveal section.stack {
+		position: relative !important;
+		margin: 0 !important;
+		padding: 0 !important;
+		page-break-after: avoid !important;
+		height: auto !important;
+		min-height: auto !important;
+	}
+
+	.reveal img {
+		box-shadow: none;
+	}
+
+
+	/* Slide backgrounds are placed inside of their slide when exporting to PDF */
+	.reveal .backgrounds {
+		display: none;
+	}
+	.reveal .slide-background {
+		display: block !important;
+		position: absolute;
+		top: 0;
+		left: 0;
+		width: 100%;
+		height: 100%;
+		z-index: auto !important;
+	}
+
+	/* Display slide speaker notes when 'showNotes' is enabled */
+	.reveal.show-notes {
+		max-width: none;
+		max-height: none;
+	}
+	.reveal .speaker-notes-pdf {
+		display: block;
+		width: 100%;
+		height: auto;
+		max-height: none;
+		top: auto;
+		right: auto;
+		bottom: auto;
+		left: auto;
+		z-index: 100;
+	}
+
+	/* Layout option which makes notes appear on a separate page */
+	.reveal .speaker-notes-pdf[data-layout="separate-page"] {
+		position: relative;
+		color: inherit;
+		background-color: transparent;
+		padding: 20px;
+		page-break-after: always;
+		border: 0;
+	}
+
+	/* Display slide numbers when 'slideNumber' is enabled */
+	.reveal .slide-number-pdf {
+		display: block;
+		position: absolute;
+		font-size: 14px;
+	}
+
+	/* This accessibility tool is not useful in PDF and breaks it visually */
+	.aria-status {
+		display: none;
+	}
+}

css/theme/README.md

@@ -1,10 +1,10 @@
 ## Dependencies
 
-Themes are written using Sass to keep things modular and reduce the need for repeated selectors across files. Make sure that you have the reveal.js development environment including the Grunt dependencies installed before proceding: https://github.com/hakimel/reveal.js#full-setup
+Themes are written using Sass to keep things modular and reduce the need for repeated selectors across files. Make sure that you have the reveal.js development environment installed before proceeding: https://revealjs.com/installation/#full-setup
 
 ## Creating a Theme
 
-To create your own theme, start by duplicating a ```.scss``` file in [/css/theme/source](https://github.com/hakimel/reveal.js/blob/master/css/theme/source). It will be automatically compiled by Grunt from Sass to CSS (see the [Gruntfile](https://github.com/hakimel/reveal.js/blob/master/Gruntfile.js)) when you run `grunt css-themes`.
+To create your own theme, start by duplicating a ```.scss``` file in [/css/theme/source](https://github.com/hakimel/reveal.js/blob/master/css/theme/source). It will be automatically compiled from Sass to CSS (see the [gulpfile](https://github.com/hakimel/reveal.js/blob/master/gulpfile.js)) when you run `npm run build -- css-themes`.
 
 Each theme file does four things in the following order:
 

css/theme/source/beige.scss

@@ -13,7 +13,7 @@
 
 
 // Include theme-specific fonts
-@import url(../../lib/font/league-gothic/league-gothic.css);
+@import url(./fonts/league-gothic/league-gothic.css);
 @import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 
 
@@ -32,8 +32,10 @@ $heading1TextShadow: 0 1px 0 #ccc, 0 2px 0 #c9c9c9, 0 3px 0 #bbb, 0 4px 0 #b9b9b
 	@include radial-gradient( rgba(247,242,211,1), rgba(255,255,255,1) );
 }
 
+// Change text colors against dark slide backgrounds
+@include dark-bg-text-color(#fff);
 
 
 // Theme template ------------------------------
 @import "../template/theme";
-// ---------------------------------------------
+// ---------------------------------------------

css/theme/source/black.scss

@@ -12,16 +12,16 @@
 
 
 // Include theme-specific fonts
-@import url(../../lib/font/source-sans-pro/source-sans-pro.css);
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
 
 
 // Override theme settings (see ../template/settings.scss)
-$backgroundColor: #222;
+$backgroundColor: #191919;
 
 $mainColor: #fff;
 $headingColor: #fff;
 
-$mainFontSize: 38px;
+$mainFontSize: 42px;
 $mainFont: 'Source Sans Pro', Helvetica, sans-serif;
 $headingFont: 'Source Sans Pro', Helvetica, sans-serif;
 $headingTextShadow: none;
@@ -37,13 +37,10 @@ $heading2Size: 1.6em;
 $heading3Size: 1.3em;
 $heading4Size: 1.0em;
 
-section.has-light-background {
-	&, h1, h2, h3, h4, h5, h6 {
-		color: #222;
-	}
-}
+// Change text colors against light slide backgrounds
+@include light-bg-text-color(#222);
 
 
 // Theme template ------------------------------
 @import "../template/theme";
-// ---------------------------------------------
+// ---------------------------------------------

css/theme/source/blood.scss

@@ -28,7 +28,6 @@ $backgroundColor: $coal;
 
 // Main text
 $mainFont: Ubuntu, 'sans-serif';
-$mainFontSize: 36px;
 $mainColor: #eee;
 
 // Headings
@@ -47,6 +46,9 @@ $linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: $blood;
 $selectionColor: #fff;
 
+// Change text colors against dark slide backgrounds
+@include light-bg-text-color(#222);
+
 
 // Theme template ------------------------------
 @import "../template/theme";
@@ -59,6 +61,12 @@ $selectionColor: #fff;
     text-shadow: 1px 1px $coal;
 }
 
+section.has-light-background {
+	p, h1, h2, h3, h4 {
+		text-shadow: none;
+	}
+}
+
 .reveal h1,
 .reveal h2,
 .reveal h3,

css/theme/source/league.scss

@@ -15,7 +15,7 @@
 
 
 // Include theme-specific fonts
-@import url(../../lib/font/league-gothic/league-gothic.css);
+@import url(./fonts/league-gothic/league-gothic.css);
 @import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 
 // Override theme settings (see ../template/settings.scss)
@@ -27,8 +27,10 @@ $heading1TextShadow: 0 1px 0 #ccc, 0 2px 0 #c9c9c9, 0 3px 0 #bbb, 0 4px 0 #b9b9b
 	@include radial-gradient( rgba(28,30,32,1), rgba(85,90,95,1) );
 }
 
+// Change text colors against light slide backgrounds
+@include light-bg-text-color(#222);
 
 
 // Theme template ------------------------------
 @import "../template/theme";
-// ---------------------------------------------
+// ---------------------------------------------

css/theme/source/moon.scss

@@ -12,7 +12,7 @@
 
 
 // Include theme-specific fonts
-@import url(../../lib/font/league-gothic/league-gothic.css);
+@import url(./fonts/league-gothic/league-gothic.css);
 @import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 
 /**
@@ -50,7 +50,8 @@ $linkColor: $blue;
 $linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: $magenta;
 
-
+// Change text colors against light slide backgrounds
+@include light-bg-text-color(#222);
 
 // Theme template ------------------------------
 @import "../template/theme";

css/theme/source/night.scss

@@ -27,7 +27,9 @@ $headingTextShadow: none;
 $headingLetterSpacing: -0.03em;
 $headingTextTransform: none;
 $selectionBackgroundColor: #e7ad52;
-$mainFontSize: 30px;
+
+// Change text colors against light slide backgrounds
+@include light-bg-text-color(#222);
 
 
 // Theme template ------------------------------

css/theme/source/serif.scss

@@ -29,6 +29,9 @@ $selectionBackgroundColor: #26351C;
   line-height: 1.3em;
 }
 
+// Change text colors against dark slide backgrounds
+@include dark-bg-text-color(#fff);
+
 
 // Theme template ------------------------------
 @import "../template/theme";

css/theme/source/simple.scss

@@ -31,6 +31,8 @@ $linkColor: #00008B;
 $linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: rgba(0, 0, 0, 0.99);
 
+// Change text colors against dark slide backgrounds
+@include dark-bg-text-color(#fff);
 
 
 // Theme template ------------------------------

css/theme/source/sky.scss

@@ -39,6 +39,9 @@ $selectionBackgroundColor: #134674;
 	@include radial-gradient( #add9e4, #f7fbfc );
 }
 
+// Change text colors against dark slide backgrounds
+@include dark-bg-text-color(#fff);
+
 
 
 // Theme template ------------------------------

css/theme/source/solarized.scss

@@ -12,7 +12,7 @@
 
 
 // Include theme-specific fonts
-@import url(../../lib/font/league-gothic/league-gothic.css);
+@import url(./fonts/league-gothic/league-gothic.css);
 @import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 
 

css/theme/source/white.scss

@@ -12,7 +12,7 @@
 
 
 // Include theme-specific fonts
-@import url(../../lib/font/source-sans-pro/source-sans-pro.css);
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
 
 
 // Override theme settings (see ../template/settings.scss)
@@ -21,7 +21,7 @@ $backgroundColor: #fff;
 $mainColor: #222;
 $headingColor: #222;
 
-$mainFontSize: 38px;
+$mainFontSize: 42px;
 $mainFont: 'Source Sans Pro', Helvetica, sans-serif;
 $headingFont: 'Source Sans Pro', Helvetica, sans-serif;
 $headingTextShadow: none;
@@ -37,13 +37,10 @@ $heading2Size: 1.6em;
 $heading3Size: 1.3em;
 $heading4Size: 1.0em;
 
-section.has-dark-background {
-	&, h1, h2, h3, h4, h5, h6 {
-		color: #fff;
-	}
-}
+// Change text colors against dark slide backgrounds
+@include dark-bg-text-color(#fff);
 
 
 // Theme template ------------------------------
 @import "../template/theme";
-// ---------------------------------------------
+// ---------------------------------------------

css/theme/template/exposer.scss

@@ -0,0 +1,27 @@
+// Exposes theme's variables for easy re-use in CSS for plugin authors
+
+:root {
+  --background-color: #{$backgroundColor};
+  --main-font: #{$mainFont};
+  --main-font-size: #{$mainFontSize};
+  --main-color: #{$mainColor};
+  --block-margin: #{$blockMargin};
+  --heading-margin: #{$headingMargin};
+  --heading-font: #{$headingFont};
+  --heading-color: #{$headingColor};
+  --heading-line-height: #{$headingLineHeight};
+  --heading-letter-spacing: #{$headingLetterSpacing};
+  --heading-text-transform: #{$headingTextTransform};
+  --heading-text-shadow: #{$headingTextShadow};
+  --heading-font-weight: #{$headingFontWeight};
+  --heading1-text-shadow: #{$heading1TextShadow};
+  --heading1-size: #{$heading1Size};
+  --heading2-size: #{$heading2Size};
+  --heading3-size: #{$heading3Size};
+  --heading4-size: #{$heading4Size};
+  --code-font: #{$codeFont};
+  --link-color: #{$linkColor};
+  --link-color-hover: #{$linkColorHover};
+  --selection-background-color: #{$selectionBackgroundColor};
+  --selection-color: #{$selectionColor};
+}

css/theme/template/mixins.scss

@@ -26,4 +26,20 @@
 	background: -o-radial-gradient( center, $type cover,  $inner 0%, $outer 100% );
 	background: -ms-radial-gradient( center, $type cover,  $inner 0%, $outer 100% );
 	background: radial-gradient( center, $type cover,  $inner 0%, $outer 100% );
+}
+
+@mixin light-bg-text-color( $color ) {
+	section.has-light-background {
+		&, h1, h2, h3, h4, h5, h6 {
+			color: $color;
+		}
+	}
+}
+
+@mixin dark-bg-text-color( $color ) {
+	section.has-dark-background {
+		&, h1, h2, h3, h4, h5, h6 {
+			color: $color;
+		}
+	}
 }

css/theme/template/settings.scss

@@ -6,7 +6,7 @@ $backgroundColor: #2b2b2b;
 
 // Primary/body text
 $mainFont: 'Lato', sans-serif;
-$mainFontSize: 36px;
+$mainFontSize: 40px;
 $mainColor: #eee;
 
 // Vertical spacing between blocks of text
@@ -28,6 +28,8 @@ $heading2Size: 2.11em;
 $heading3Size: 1.55em;
 $heading4Size: 1.00em;
 
+$codeFont: monospace;
+
 // Links and actions
 $linkColor: #13DAEC;
 $linkColorHover: lighten( $linkColor, 20% );
@@ -40,4 +42,4 @@ $selectionColor: #fff;
 // to return a background image or gradient
 @mixin bodyBackground() {
 	background: $backgroundColor;
-}
+}

css/theme/template/theme.scss

@@ -4,7 +4,9 @@
  * GLOBAL STYLES
  *********************************************/
 
-body {
+@import "./exposer";
+
+.reveal-viewport {
 	@include bodyBackground();
 	background-color: $backgroundColor;
 }
@@ -16,14 +18,20 @@ body {
 	color: $mainColor;
 }
 
-::selection {
+.reveal ::selection {
 	color: $selectionColor;
 	background: $selectionBackgroundColor;
 	text-shadow: none;
 }
 
-.reveal .slides>section,
-.reveal .slides>section>section {
+.reveal ::-moz-selection {
+	color: $selectionColor;
+	background: $selectionBackgroundColor;
+	text-shadow: none;
+}
+
+.reveal .slides section,
+.reveal .slides section>section {
 	line-height: 1.3;
 	font-weight: inherit;
 }
@@ -71,6 +79,16 @@ body {
 	line-height: 1.3;
 }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+	margin-bottom: 0;
+}
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -128,11 +146,6 @@ body {
 	margin-left: 40px;
 }
 
-.reveal q,
-.reveal blockquote {
-	quotes: none;
-}
-
 .reveal blockquote {
 	display: block;
 	position: relative;
@@ -161,15 +174,17 @@ body {
 
 	text-align: left;
 	font-size: 0.55em;
-	font-family: monospace;
+	font-family: $codeFont;
 	line-height: 1.2em;
 
 	word-wrap: break-word;
 
-	box-shadow: 0px 0px 6px rgba(0,0,0,0.3);
+	box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
 }
+
 .reveal code {
-	font-family: monospace;
+	font-family: $codeFont;
+	text-transform: none;
 }
 
 .reveal pre code {
@@ -214,9 +229,11 @@ body {
 
 .reveal sup {
 	vertical-align: super;
+	font-size: smaller;
 }
 .reveal sub {
 	vertical-align: sub;
+	font-size: smaller;
 }
 
 .reveal small {
@@ -230,6 +247,10 @@ body {
 	vertical-align: top;
 }
 
+.reveal img {
+	margin: $blockMargin 0;
+}
+
 
 /*********************************************
  * LINKS
@@ -238,14 +259,10 @@ body {
 .reveal a {
 	color: $linkColor;
 	text-decoration: none;
-
-	-webkit-transition: color .15s ease;
-	   -moz-transition: color .15s ease;
-	        transition: color .15s ease;
+	transition: color .15s ease;
 }
 	.reveal a:hover {
 		color: $linkColorHover;
-
 		text-shadow: none;
 		border: none;
 	}
@@ -257,74 +274,30 @@ body {
 
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
 
-.reveal section img {
-	margin: 15px 0px;
-	background: rgba(255,255,255,0.12);
+.reveal .r-frame {
 	border: 4px solid $mainColor;
-
 	box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
 }
 
-	.reveal section img.plain {
-		border: 0;
-		box-shadow: none;
-	}
+.reveal a .r-frame {
+	transition: all .15s linear;
+}
 
-	.reveal a img {
-		-webkit-transition: all .15s linear;
-		   -moz-transition: all .15s linear;
-		        transition: all .15s linear;
-	}
-
-	.reveal a:hover img {
-		background: rgba(255,255,255,0.2);
-		border-color: $linkColor;
-
-		box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
-	}
+.reveal a:hover .r-frame {
+	border-color: $linkColor;
+	box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-	border-right-color: $linkColor;
-}
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-	border-left-color: $linkColor;
-}
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-	border-bottom-color: $linkColor;
-}
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-	border-top-color: $linkColor;
-}
-
-.reveal .controls .navigate-left.enabled:hover {
-	border-right-color: $linkColorHover;
-}
-
-.reveal .controls .navigate-right.enabled:hover {
-	border-left-color: $linkColorHover;
-}
-
-.reveal .controls .navigate-up.enabled:hover {
-	border-bottom-color: $linkColorHover;
-}
-
-.reveal .controls .navigate-down.enabled:hover {
-	border-top-color: $linkColorHover;
+.reveal .controls {
+	color: $linkColor;
 }
 
 
@@ -334,13 +307,14 @@ body {
 
 .reveal .progress {
 	background: rgba(0,0,0,0.2);
+	color: $linkColor;
 }
-	.reveal .progress span {
-		background: $linkColor;
-
-		-webkit-transition: width 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985);
-		   -moz-transition: width 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985);
-		        transition: width 800ms cubic-bezier(0.260, 0.860, 0.440, 0.985);
-	}
-
 
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+ @media print {
+    .backgrounds {
+        background-color: $backgroundColor;
+    }
+}

demo.html

@@ -12,26 +12,14 @@
 		<meta name="apple-mobile-web-app-capable" content="yes">
 		<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
 
-		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+		<meta name="viewport" content="width=device-width, initial-scale=1.0">
 
-		<link rel="stylesheet" href="css/reveal.css">
-		<link rel="stylesheet" href="css/theme/black.css" id="theme">
+		<link rel="stylesheet" href="dist/reset.css">
+		<link rel="stylesheet" href="dist/reveal.css">
+		<link rel="stylesheet" href="dist/theme/black.css" id="theme">
 
 		<!-- Theme used for syntax highlighting of code -->
-		<link rel="stylesheet" href="lib/css/zenburn.css">
-
-		<!-- Printing and PDF exports -->
-		<script>
-			var link = document.createElement( 'link' );
-			link.rel = 'stylesheet';
-			link.type = 'text/css';
-			link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
-			document.getElementsByTagName( 'head' )[0].appendChild( link );
-		</script>
-
-		<!--[if lt IE 9]>
-		<script src="lib/js/html5shiv.js"></script>
-		<![endif]-->
+		<link rel="stylesheet" href="plugin/highlight/monokai.css" id="highlight-theme">
 	</head>
 
 	<body>
@@ -41,10 +29,12 @@
 			<!-- Any section element inside of this container is displayed as a slide -->
 			<div class="slides">
 				<section>
-					<h1>Reveal.js</h1>
+					<a href="https://revealjs.com">
+						<img src="https://static.slid.es/reveal/logo-v1/reveal-white-text.svg" alt="reveal.js logo" style="height: 180px; margin: 0 auto 4rem auto; background: transparent;" class="demo-logo">
+					</a>
 					<h3>The HTML Presentation Framework</h3>
 					<p>
-						<small>Created by <a href="http://hakim.se">Hakim El Hattab</a> / <a href="http://twitter.com/hakimel">@hakimel</a></small>
+						<small>Created by <a href="http://hakim.se">Hakim El Hattab</a> and <a href="https://github.com/hakimel/reveal.js/graphs/contributors">contributors</a></small>
 					</p>
 				</section>
 
@@ -63,7 +53,7 @@
 						<p>Use the <em>Space</em> key to navigate through all slides.</p>
 						<br>
 						<a href="#" class="navigate-down">
-							<img width="178" height="238" data-src="https://s3.amazonaws.com/hakim-static/reveal-js/arrow.png" alt="Down arrow">
+							<img class="r-frame" style="background: rgba(255,255,255,0.1);" width="178" height="238" data-src="https://static.slid.es/reveal/arrow.png" alt="Down arrow">
 						</a>
 					</section>
 					<section>
@@ -75,7 +65,7 @@
 						<p>That's it, time to go back up.</p>
 						<br>
 						<a href="#/2">
-							<img width="178" height="238" data-src="https://s3.amazonaws.com/hakim-static/reveal-js/arrow.png" alt="Up arrow" style="transform: rotate(180deg); -webkit-transform: rotate(180deg);">
+							<img class="r-frame" style="background: rgba(255,255,255,0.1); transform: rotate(180deg);" width="178" height="238" data-src="https://static.slid.es/reveal/arrow.png" alt="Up arrow">
 						</a>
 					</section>
 				</section>
@@ -83,18 +73,103 @@
 				<section>
 					<h2>Slides</h2>
 					<p>
-						Not a coder? Not a problem. There's a fully-featured visual editor for authoring these, try it out at <a href="http://slides.com" target="_blank">http://slides.com</a>.
+						Not a coder? Not a problem. There's a fully-featured visual editor for authoring these, try it out at <a href="https://slides.com" target="_blank">https://slides.com</a>.
 					</p>
 				</section>
 
+				<section data-visibility="hidden">
+					<h2>Hidden Slides</h2>
+					<p>
+						This slide is visible in the source, but hidden when the presentation is viewed. You can show all hidden slides by setting the `showHiddenSlides` config option to `true`.
+					</p>
+				</section>
+
+				<section data-auto-animate>
+					<h2 data-id="code-title">Pretty Code</h2>
+					<pre data-id="code-animation"><code class="hljs" data-trim data-line-numbers>
+						import React, { useState } from 'react';
+
+						function Example() {
+						  const [count, setCount] = useState(0);
+
+						  return (
+						    ...
+						  );
+						}
+					</code></pre>
+					<p>Code syntax highlighting courtesy of <a href="https://highlightjs.org/usage/">highlight.js</a>.</p>
+				</section>
+
+				<section data-auto-animate>
+					<h2 data-id="code-title">With animations</h2>
+					<pre data-id="code-animation"><code class="hljs" data-trim data-line-numbers="|4,8-11|17|22-24"><script type="text/template">
+						import React, { useState } from 'react';
+
+						function Example() {
+						  const [count, setCount] = useState(0);
+
+						  return (
+						    <div>
+						      <p>You clicked {count} times</p>
+						      <button onClick={() => setCount(count + 1)}>
+						        Click me
+						      </button>
+						    </div>
+						  );
+						}
+
+						function SecondExample() {
+						  const [count, setCount] = useState(0);
+
+						  return (
+						    <div>
+						      <p>You clicked {count} times</p>
+						      <button onClick={() => setCount(count + 1)}>
+						        Click me
+						      </button>
+						    </div>
+						  );
+						}
+					</script></code></pre>
+				</section>
+
 				<section>
 					<h2>Point of View</h2>
 					<p>
 						Press <strong>ESC</strong> to enter the slide overview.
 					</p>
 					<p>
-						Hold down alt and click on any element to zoom in on it using <a href="http://lab.hakim.se/zoom-js">zoom.js</a>. Alt + click anywhere to zoom back out.
+						Hold down the <strong>alt</strong> key (<strong>ctrl</strong> in Linux) and click on any element to zoom towards it using <a href="http://lab.hakim.se/zoom-js">zoom.js</a>. Click again to zoom back out.
 					</p>
+					<p>
+						(NOTE: Use ctrl + click in Linux.)
+					</p>
+				</section>
+
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<h2>Auto-Animate</h2>
+					<p>Automatically animate matching elements across slides with <a href="https://revealjs.com/auto-animate/">Auto-Animate</a>.</p>
+					<div class="r-hstack justify-center">
+						<div data-id="box1" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+						<div data-id="box2" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+						<div data-id="box3" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+					</div>
+				</section>
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<div class="r-hstack justify-center">
+						<div data-id="box1" data-auto-animate-delay="0" style="background: cyan; width: 150px; height: 100px; margin: 10px;"></div>
+						<div data-id="box2" data-auto-animate-delay="0.1" style="background: magenta; width: 150px; height: 100px; margin: 10px;"></div>
+						<div data-id="box3" data-auto-animate-delay="0.2" style="background: yellow; width: 150px; height: 100px; margin: 10px;"></div>
+					</div>
+					<h2 style="margin-top: 20px;">Auto-Animate</h2>
+				</section>
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<div class="r-stack">
+						<div data-id="box1" style="background: cyan; width: 300px; height: 300px; border-radius: 200px;"></div>
+						<div data-id="box2" style="background: magenta; width: 200px; height: 200px; border-radius: 200px;"></div>
+						<div data-id="box3" style="background: yellow; width: 100px; height: 100px; border-radius: 200px;"></div>
+					</div>
+					<h2 style="margin-top: 20px;">Auto-Animate</h2>
 				</section>
 
 				<section>
@@ -109,19 +184,24 @@
 						## Markdown support
 
 						Write content using inline or external Markdown.
-						Instructions and more info available in the [readme](https://github.com/hakimel/reveal.js#markdown).
+						Instructions and more info available in the [docs](https://revealjs.com/markdown/).
 
-						```
+						```[]
 						<section data-markdown>
 						  ## Markdown support
 
 						  Write content using inline or external Markdown.
-						  Instructions and more info available in the [readme](https://github.com/hakimel/reveal.js#markdown).
+						  Instructions and more info available in the [docs](https://revealjs.com/markdown/).
 						</section>
 						```
 					</script>
 				</section>
 
+				<section>
+					<p>Add the <code>r-fit-text</code> class to auto-size text</p>
+					<h2 class="r-fit-text">FIT TEXT</h2>
+				</section>
+
 				<section>
 					<section id="fragments">
 						<h2>Fragments</h2>
@@ -139,8 +219,14 @@
 						<p class="fragment grow">grow</p>
 						<p class="fragment shrink">shrink</p>
 						<p class="fragment fade-out">fade-out</p>
-						<p class="fragment fade-up">fade-up (also down, left and right!)</p>
-						<p class="fragment current-visible">current-visible</p>
+						<p>
+							<span style="display: inline-block;" class="fragment fade-right">fade-right, </span>
+							<span style="display: inline-block;" class="fragment fade-up">up, </span>
+							<span style="display: inline-block;" class="fragment fade-down">down, </span>
+							<span style="display: inline-block;" class="fragment fade-left">left</span>
+						</p>
+						<p class="fragment fade-in-then-out">fade-in-then-out</p>
+						<p class="fragment fade-in-then-semi-out">fade-in-then-semi-out</p>
 						<p>Highlight <span class="fragment highlight-red">red</span> <span class="fragment highlight-blue">blue</span> <span class="fragment highlight-green">green</span></p>
 					</section>
 				</section>
@@ -184,21 +270,21 @@
 							Set <code>data-background="#dddddd"</code> on a slide to change the background color. All CSS color formats are supported.
 						</p>
 						<a href="#" class="navigate-down">
-							<img width="178" height="238" data-src="https://s3.amazonaws.com/hakim-static/reveal-js/arrow.png" alt="Down arrow">
+							<img class="r-frame" style="background: rgba(255,255,255,0.1);" width="178" height="238" data-src="https://static.slid.es/reveal/arrow.png" alt="Down arrow">
 						</a>
 					</section>
-					<section data-background="https://s3.amazonaws.com/hakim-static/reveal-js/image-placeholder.png">
+					<section data-background="https://static.slid.es/reveal/image-placeholder.png">
 						<h2>Image Backgrounds</h2>
-						<pre><code class="hljs">&lt;section data-background="image.png"&gt;</code></pre>
+						<pre><code class="hljs html">&lt;section data-background="image.png"&gt;</code></pre>
 					</section>
-					<section data-background="https://s3.amazonaws.com/hakim-static/reveal-js/image-placeholder.png" data-background-repeat="repeat" data-background-size="100px">
+					<section data-background="https://static.slid.es/reveal/image-placeholder.png" data-background-repeat="repeat" data-background-size="100px">
 						<h2>Tiled Backgrounds</h2>
-						<pre><code class="hljs" style="word-wrap: break-word;">&lt;section data-background="image.png" data-background-repeat="repeat" data-background-size="100px"&gt;</code></pre>
+						<pre><code class="hljs html" style="word-wrap: break-word;">&lt;section data-background="image.png" data-background-repeat="repeat" data-background-size="100px"&gt;</code></pre>
 					</section>
-					<section data-background-video="https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.mp4,https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.webm" data-background-color="#000000">
+					<section data-background-video="https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.mp4" data-background-color="#000000">
 						<div style="background-color: rgba(0, 0, 0, 0.9); color: #fff; padding: 20px;">
 							<h2>Video Backgrounds</h2>
-							<pre><code class="hljs" style="word-wrap: break-word;">&lt;section data-background-video="video.mp4,video.webm"&gt;</code></pre>
+							<pre><code class="hljs html" style="word-wrap: break-word;">&lt;section data-background-video="video.mp4,video.webm"&gt;</code></pre>
 						</div>
 					</section>
 					<section data-background="http://i.giphy.com/90F8aUepslB84.gif">
@@ -211,7 +297,7 @@
 					<p>
 						Different background transitions are available via the backgroundTransition option. This one's called "zoom".
 					</p>
-					<pre><code class="hljs">Reveal.configure({ backgroundTransition: 'zoom' })</code></pre>
+					<pre><code class="hljs javascript">Reveal.configure({ backgroundTransition: 'zoom' })</code></pre>
 				</section>
 
 				<section data-transition="slide" data-background="#b5533c" data-background-transition="zoom">
@@ -219,28 +305,14 @@
 					<p>
 						You can override background transitions per-slide.
 					</p>
-					<pre><code class="hljs" style="word-wrap: break-word;">&lt;section data-background-transition="zoom"&gt;</code></pre>
+					<pre><code class="hljs html" style="word-wrap: break-word;">&lt;section data-background-transition="zoom"&gt;</code></pre>
 				</section>
 
-				<section>
-					<h2>Pretty Code</h2>
-					<pre><code class="hljs" data-trim contenteditable>
-function linkify( selector ) {
-  if( supports3DTransforms ) {
-
-    var nodes = document.querySelectorAll( selector );
-
-    for( var i = 0, len = nodes.length; i &lt; len; i++ ) {
-      var node = nodes[i];
-
-      if( !node.className ) {
-        node.className += ' roll';
-      }
-    }
-  }
-}
-					</code></pre>
-					<p>Code syntax highlighting courtesy of <a href="http://softwaremaniacs.org/soft/highlight/en/description/">highlight.js</a>.</p>
+				<section data-background-iframe="https://hakim.se" data-background-interactive>
+					<div style="position: absolute; width: 40%; right: 0; box-shadow: 0 1px 4px rgba(0,0,0,0.5), 0 5px 25px rgba(0,0,0,0.2); background-color: rgba(0, 0, 0, 0.9); color: #fff; padding: 20px; font-size: 20px; text-align: left;">
+						<h2>Iframe Backgrounds</h2>
+						<p>Since reveal.js runs on the web, you can easily embed other web content. Try interacting with the page in the background.</p>
+					</div>
 				</section>
 
 				<section>
@@ -295,8 +367,7 @@ function linkify( selector ) {
 				<section>
 					<h2>Clever Quotes</h2>
 					<p>
-						These guys come in two forms, inline: <q cite="http://searchservervirtualization.techtarget.com/definition/Our-Favorite-Technology-Quotations">
-						&ldquo;The nice thing about standards is that there are so many to choose from&rdquo;</q> and block:
+						These guys come in two forms, inline: <q cite="http://searchservervirtualization.techtarget.com/definition/Our-Favorite-Technology-Quotations">The nice thing about standards is that there are so many to choose from</q> and block:
 					</p>
 					<blockquote cite="http://searchservervirtualization.techtarget.com/definition/Our-Favorite-Technology-Quotations">
 						&ldquo;For years there has been a theory that millions of monkeys typing at random on millions of typewriters would
@@ -314,7 +385,7 @@ function linkify( selector ) {
 
 				<section>
 					<h2>Speaker View</h2>
-					<p>There's a <a href="https://github.com/hakimel/reveal.js#speaker-notes">speaker view</a>. It includes a timer, preview of the upcoming slide as well as your speaker notes.</p>
+					<p>There's a <a href="https://revealjs.com/speaker-view/">speaker view</a>. It includes a timer, preview of the upcoming slide as well as your speaker notes.</p>
 					<p>Press the <em>S</em> key to try it out.</p>
 
 					<aside class="notes">
@@ -324,7 +395,7 @@ function linkify( selector ) {
 
 				<section>
 					<h2>Export to PDF</h2>
-					<p>Presentations can be <a href="https://github.com/hakimel/reveal.js#pdf-export">exported to PDF</a>, here's an example:</p>
+					<p>Presentations can be <a href="https://revealjs.com/pdf-export/">exported to PDF</a>, here's an example:</p>
 					<iframe data-src="https://www.slideshare.net/slideshow/embed_code/42840540" width="445" height="355" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" style="border:3px solid #666; margin-bottom:5px; max-width: 100%;" allowfullscreen> </iframe>
 				</section>
 
@@ -343,7 +414,7 @@ function linkify( selector ) {
 						Additionally custom events can be triggered on a per slide basis by binding to the <code>data-state</code> name.
 					</p>
 					<pre><code class="javascript" data-trim contenteditable style="font-size: 18px;">
-Reveal.addEventListener( 'customevent', function() {
+Reveal.on( 'customevent', function() {
 	console.log( '"customevent" has fired' );
 } );
 					</code></pre>
@@ -360,17 +431,17 @@ Reveal.addEventListener( 'customevent', function() {
 					<h2>Much more</h2>
 					<ul>
 						<li>Right-to-left support</li>
-						<li><a href="https://github.com/hakimel/reveal.js#api">Extensive JavaScript API</a></li>
-						<li><a href="https://github.com/hakimel/reveal.js#auto-sliding">Auto-progression</a></li>
-						<li><a href="https://github.com/hakimel/reveal.js#parallax-background">Parallax backgrounds</a></li>
-						<li><a href="https://github.com/hakimel/reveal.js#keyboard-bindings">Custom keyboard bindings</a></li>
+						<li><a href="https://revealjs.com/api/">Extensive JavaScript API</a></li>
+						<li><a href="https://revealjs.com/auto-slide/">Auto-progression</a></li>
+						<li><a href="https://revealjs.com/backgrounds/#parallax-background">Parallax backgrounds</a></li>
+						<li><a href="https://revealjs.com/keyboard/">Custom keyboard bindings</a></li>
 					</ul>
 				</section>
 
 				<section style="text-align: left;">
 					<h1>THE END</h1>
 					<p>
-						- <a href="http://slides.com">Try the online editor</a> <br>
+						- <a href="https://slides.com">Try the online editor</a> <br>
 						- <a href="https://github.com/hakimel/reveal.js">Source code &amp; documentation</a>
 					</p>
 				</section>
@@ -379,29 +450,24 @@ Reveal.addEventListener( 'customevent', function() {
 
 		</div>
 
-		<script src="lib/js/head.min.js"></script>
-		<script src="js/reveal.js"></script>
-
+		<script src="dist/reveal.js"></script>
+		<script src="plugin/zoom/zoom.js"></script>
+		<script src="plugin/notes/notes.js"></script>
+		<script src="plugin/search/search.js"></script>
+		<script src="plugin/markdown/markdown.js"></script>
+		<script src="plugin/highlight/highlight.js"></script>
 		<script>
 
-			// More info https://github.com/hakimel/reveal.js#configuration
+			// Also available as an ES module, see:
+			// https://revealjs.com/initialization/
 			Reveal.initialize({
 				controls: true,
 				progress: true,
-				history: true,
 				center: true,
+				hash: true,
 
-				transition: 'slide', // none/fade/slide/convex/concave/zoom
-
-				// More info https://github.com/hakimel/reveal.js#dependencies
-				dependencies: [
-					{ src: 'lib/js/classList.js', condition: function() { return !document.body.classList; } },
-					{ src: 'plugin/markdown/marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
-					{ src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
-					{ src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
-					{ src: 'plugin/zoom-js/zoom.js', async: true },
-					{ src: 'plugin/notes/notes.js', async: true }
-				]
+				// Learn about plugins: https://revealjs.com/plugins/
+				plugins: [ RevealZoom, RevealNotes, RevealSearch, RevealMarkdown, RevealHighlight ]
 			});
 
 		</script>

dist/reset.css

@@ -0,0 +1,30 @@
+/* http://meyerweb.com/eric/tools/css/reset/
+   v4.0 | 20180602
+   License: none (public domain)
+*/
+
+html, body, div, span, applet, object, iframe,
+h1, h2, h3, h4, h5, h6, p, blockquote, pre,
+a, abbr, acronym, address, big, cite, code,
+del, dfn, em, img, ins, kbd, q, s, samp,
+small, strike, strong, sub, sup, tt, var,
+b, u, i, center,
+dl, dt, dd, ol, ul, li,
+fieldset, form, label, legend,
+table, caption, tbody, tfoot, thead, tr, th, td,
+article, aside, canvas, details, embed,
+figure, figcaption, footer, header, hgroup,
+main, menu, nav, output, ruby, section, summary,
+time, mark, audio, video {
+  margin: 0;
+  padding: 0;
+  border: 0;
+  font-size: 100%;
+  font: inherit;
+  vertical-align: baseline;
+}
+/* HTML5 display-role reset for older browsers */
+article, aside, details, figcaption, figure,
+footer, header, hgroup, main, menu, nav, section {
+  display: block;
+}

dist/theme/beige.css

@@ -3,12 +3,40 @@
  *
  * Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se
  */
-@import url(../../lib/font/league-gothic/league-gothic.css);
+@import url(./fonts/league-gothic/league-gothic.css);
 @import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+section.has-dark-background, section.has-dark-background h1, section.has-dark-background h2, section.has-dark-background h3, section.has-dark-background h4, section.has-dark-background h5, section.has-dark-background h6 {
+  color: #fff; }
+
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
-body {
+:root {
+  --background-color: #f7f3de;
+  --main-font: Lato, sans-serif;
+  --main-font-size: 40px;
+  --main-color: #333;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: League Gothic, Impact, sans-serif;
+  --heading-color: #333;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: normal;
+  --heading-text-transform: uppercase;
+  --heading-text-shadow: none;
+  --heading-font-weight: normal;
+  --heading1-text-shadow: 0 1px 0 #ccc, 0 2px 0 #c9c9c9, 0 3px 0 #bbb, 0 4px 0 #b9b9b9, 0 5px 0 #aaa, 0 6px 1px rgba(0, 0, 0, 0.1), 0 0 5px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.3), 0 3px 5px rgba(0, 0, 0, 0.2), 0 5px 10px rgba(0, 0, 0, 0.25), 0 20px 20px rgba(0, 0, 0, 0.15);
+  --heading1-size: 3.77em;
+  --heading2-size: 2.11em;
+  --heading3-size: 1.55em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #8b743d;
+  --link-color-hover: #c0a86e;
+  --selection-background-color: rgba(79, 64, 28, 0.99);
+  --selection-color: #fff; }
+
+.reveal-viewport {
   background: #f7f2d3;
   background: -moz-radial-gradient(center, circle cover, white 0%, #f7f2d3 100%);
   background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, white), color-stop(100%, #f7f2d3));
@@ -20,17 +48,22 @@ body {
 
 .reveal {
   font-family: "Lato", sans-serif;
-  font-size: 36px;
+  font-size: 40px;
   font-weight: normal;
   color: #333; }
 
-::selection {
+.reveal ::selection {
   color: #fff;
   background: rgba(79, 64, 28, 0.99);
   text-shadow: none; }
 
-.reveal .slides > section,
-.reveal .slides > section > section {
+.reveal ::-moz-selection {
+  color: #fff;
+  background: rgba(79, 64, 28, 0.99);
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
   line-height: 1.3;
   font-weight: inherit; }
 
@@ -75,6 +108,15 @@ body {
   margin: 20px 0;
   line-height: 1.3; }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0; }
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -121,10 +163,6 @@ body {
 .reveal dd {
   margin-left: 40px; }
 
-.reveal q,
-.reveal blockquote {
-  quotes: none; }
-
 .reveal blockquote {
   display: block;
   position: relative;
@@ -152,10 +190,11 @@ body {
   font-family: monospace;
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
 
 .reveal code {
-  font-family: monospace; }
+  font-family: monospace;
+  text-transform: none; }
 
 .reveal pre code {
   display: block;
@@ -191,10 +230,12 @@ body {
   border-bottom: none; }
 
 .reveal sup {
-  vertical-align: super; }
+  vertical-align: super;
+  font-size: smaller; }
 
 .reveal sub {
-  vertical-align: sub; }
+  vertical-align: sub;
+  font-size: smaller; }
 
 .reveal small {
   display: inline-block;
@@ -205,14 +246,15 @@ body {
 .reveal small * {
   vertical-align: top; }
 
+.reveal img {
+  margin: 20px 0; }
+
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
   color: #8b743d;
   text-decoration: none;
-  -webkit-transition: color .15s ease;
-  -moz-transition: color .15s ease;
   transition: color .15s ease; }
 
 .reveal a:hover {
@@ -225,67 +267,35 @@ body {
   background: #564826; }
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
-.reveal section img {
-  margin: 15px 0px;
-  background: rgba(255, 255, 255, 0.12);
+.reveal .r-frame {
   border: 4px solid #333;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
-.reveal section img.plain {
-  border: 0;
-  box-shadow: none; }
-
-.reveal a img {
-  -webkit-transition: all .15s linear;
-  -moz-transition: all .15s linear;
+.reveal a .r-frame {
   transition: all .15s linear; }
 
-.reveal a:hover img {
-  background: rgba(255, 255, 255, 0.2);
+.reveal a:hover .r-frame {
   border-color: #8b743d;
   box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-  border-right-color: #8b743d; }
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-  border-left-color: #8b743d; }
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-  border-bottom-color: #8b743d; }
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-  border-top-color: #8b743d; }
-
-.reveal .controls .navigate-left.enabled:hover {
-  border-right-color: #c0a86e; }
-
-.reveal .controls .navigate-right.enabled:hover {
-  border-left-color: #c0a86e; }
-
-.reveal .controls .navigate-up.enabled:hover {
-  border-bottom-color: #c0a86e; }
-
-.reveal .controls .navigate-down.enabled:hover {
-  border-top-color: #c0a86e; }
+.reveal .controls {
+  color: #8b743d; }
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
-  background: rgba(0, 0, 0, 0.2); }
+  background: rgba(0, 0, 0, 0.2);
+  color: #8b743d; }
 
-.reveal .progress span {
-  background: #8b743d;
-  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #f7f3de; } }

dist/theme/black.css

@@ -3,30 +3,60 @@
  *
  * By Hakim El Hattab, http://hakim.se
  */
-@import url(../../lib/font/source-sans-pro/source-sans-pro.css);
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
 section.has-light-background, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4, section.has-light-background h5, section.has-light-background h6 {
   color: #222; }
 
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
-body {
-  background: #222;
-  background-color: #222; }
+:root {
+  --background-color: #191919;
+  --main-font: Source Sans Pro, Helvetica, sans-serif;
+  --main-font-size: 42px;
+  --main-color: #fff;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: Source Sans Pro, Helvetica, sans-serif;
+  --heading-color: #fff;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: normal;
+  --heading-text-transform: uppercase;
+  --heading-text-shadow: none;
+  --heading-font-weight: 600;
+  --heading1-text-shadow: none;
+  --heading1-size: 2.5em;
+  --heading2-size: 1.6em;
+  --heading3-size: 1.3em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #42affa;
+  --link-color-hover: #8dcffc;
+  --selection-background-color: #bee4fd;
+  --selection-color: #fff; }
+
+.reveal-viewport {
+  background: #191919;
+  background-color: #191919; }
 
 .reveal {
   font-family: "Source Sans Pro", Helvetica, sans-serif;
-  font-size: 38px;
+  font-size: 42px;
   font-weight: normal;
   color: #fff; }
 
-::selection {
+.reveal ::selection {
   color: #fff;
   background: #bee4fd;
   text-shadow: none; }
 
-.reveal .slides > section,
-.reveal .slides > section > section {
+.reveal ::-moz-selection {
+  color: #fff;
+  background: #bee4fd;
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
   line-height: 1.3;
   font-weight: inherit; }
 
@@ -71,6 +101,15 @@ body {
   margin: 20px 0;
   line-height: 1.3; }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0; }
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -117,10 +156,6 @@ body {
 .reveal dd {
   margin-left: 40px; }
 
-.reveal q,
-.reveal blockquote {
-  quotes: none; }
-
 .reveal blockquote {
   display: block;
   position: relative;
@@ -148,10 +183,11 @@ body {
   font-family: monospace;
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
 
 .reveal code {
-  font-family: monospace; }
+  font-family: monospace;
+  text-transform: none; }
 
 .reveal pre code {
   display: block;
@@ -187,10 +223,12 @@ body {
   border-bottom: none; }
 
 .reveal sup {
-  vertical-align: super; }
+  vertical-align: super;
+  font-size: smaller; }
 
 .reveal sub {
-  vertical-align: sub; }
+  vertical-align: sub;
+  font-size: smaller; }
 
 .reveal small {
   display: inline-block;
@@ -201,14 +239,15 @@ body {
 .reveal small * {
   vertical-align: top; }
 
+.reveal img {
+  margin: 20px 0; }
+
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
   color: #42affa;
   text-decoration: none;
-  -webkit-transition: color .15s ease;
-  -moz-transition: color .15s ease;
   transition: color .15s ease; }
 
 .reveal a:hover {
@@ -221,67 +260,35 @@ body {
   background: #068de9; }
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
-.reveal section img {
-  margin: 15px 0px;
-  background: rgba(255, 255, 255, 0.12);
+.reveal .r-frame {
   border: 4px solid #fff;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
-.reveal section img.plain {
-  border: 0;
-  box-shadow: none; }
-
-.reveal a img {
-  -webkit-transition: all .15s linear;
-  -moz-transition: all .15s linear;
+.reveal a .r-frame {
   transition: all .15s linear; }
 
-.reveal a:hover img {
-  background: rgba(255, 255, 255, 0.2);
+.reveal a:hover .r-frame {
   border-color: #42affa;
   box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-  border-right-color: #42affa; }
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-  border-left-color: #42affa; }
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-  border-bottom-color: #42affa; }
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-  border-top-color: #42affa; }
-
-.reveal .controls .navigate-left.enabled:hover {
-  border-right-color: #8dcffc; }
-
-.reveal .controls .navigate-right.enabled:hover {
-  border-left-color: #8dcffc; }
-
-.reveal .controls .navigate-up.enabled:hover {
-  border-bottom-color: #8dcffc; }
-
-.reveal .controls .navigate-down.enabled:hover {
-  border-top-color: #8dcffc; }
+.reveal .controls {
+  color: #42affa; }
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
-  background: rgba(0, 0, 0, 0.2); }
+  background: rgba(0, 0, 0, 0.2);
+  color: #42affa; }
 
-.reveal .progress span {
-  background: #42affa;
-  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #191919; } }

dist/theme/blood.css

@@ -10,26 +10,59 @@
  *
  */
 @import url(https://fonts.googleapis.com/css?family=Ubuntu:300,700,300italic,700italic);
+section.has-light-background, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4, section.has-light-background h5, section.has-light-background h6 {
+  color: #222; }
+
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
-body {
+:root {
+  --background-color: #222;
+  --main-font: Ubuntu, sans-serif;
+  --main-font-size: 40px;
+  --main-color: #eee;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: Ubuntu, sans-serif;
+  --heading-color: #eee;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: normal;
+  --heading-text-transform: uppercase;
+  --heading-text-shadow: 2px 2px 2px #222;
+  --heading-font-weight: normal;
+  --heading1-text-shadow: 0 1px 0 #ccc, 0 2px 0 #c9c9c9, 0 3px 0 #bbb, 0 4px 0 #b9b9b9, 0 5px 0 #aaa, 0 6px 1px rgba(0, 0, 0, 0.1), 0 0 5px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.3), 0 3px 5px rgba(0, 0, 0, 0.2), 0 5px 10px rgba(0, 0, 0, 0.25), 0 20px 20px rgba(0, 0, 0, 0.15);
+  --heading1-size: 3.77em;
+  --heading2-size: 2.11em;
+  --heading3-size: 1.55em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #a23;
+  --link-color-hover: #dd5566;
+  --selection-background-color: #a23;
+  --selection-color: #fff; }
+
+.reveal-viewport {
   background: #222;
   background-color: #222; }
 
 .reveal {
   font-family: Ubuntu, "sans-serif";
-  font-size: 36px;
+  font-size: 40px;
   font-weight: normal;
   color: #eee; }
 
-::selection {
+.reveal ::selection {
   color: #fff;
   background: #a23;
   text-shadow: none; }
 
-.reveal .slides > section,
-.reveal .slides > section > section {
+.reveal ::-moz-selection {
+  color: #fff;
+  background: #a23;
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
   line-height: 1.3;
   font-weight: inherit; }
 
@@ -74,6 +107,15 @@ body {
   margin: 20px 0;
   line-height: 1.3; }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0; }
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -120,10 +162,6 @@ body {
 .reveal dd {
   margin-left: 40px; }
 
-.reveal q,
-.reveal blockquote {
-  quotes: none; }
-
 .reveal blockquote {
   display: block;
   position: relative;
@@ -151,10 +189,11 @@ body {
   font-family: monospace;
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
 
 .reveal code {
-  font-family: monospace; }
+  font-family: monospace;
+  text-transform: none; }
 
 .reveal pre code {
   display: block;
@@ -190,10 +229,12 @@ body {
   border-bottom: none; }
 
 .reveal sup {
-  vertical-align: super; }
+  vertical-align: super;
+  font-size: smaller; }
 
 .reveal sub {
-  vertical-align: sub; }
+  vertical-align: sub;
+  font-size: smaller; }
 
 .reveal small {
   display: inline-block;
@@ -204,14 +245,15 @@ body {
 .reveal small * {
   vertical-align: top; }
 
+.reveal img {
+  margin: 20px 0; }
+
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
   color: #a23;
   text-decoration: none;
-  -webkit-transition: color .15s ease;
-  -moz-transition: color .15s ease;
   transition: color .15s ease; }
 
 .reveal a:hover {
@@ -224,75 +266,46 @@ body {
   background: #6a1520; }
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
-.reveal section img {
-  margin: 15px 0px;
-  background: rgba(255, 255, 255, 0.12);
+.reveal .r-frame {
   border: 4px solid #eee;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
-.reveal section img.plain {
-  border: 0;
-  box-shadow: none; }
-
-.reveal a img {
-  -webkit-transition: all .15s linear;
-  -moz-transition: all .15s linear;
+.reveal a .r-frame {
   transition: all .15s linear; }
 
-.reveal a:hover img {
-  background: rgba(255, 255, 255, 0.2);
+.reveal a:hover .r-frame {
   border-color: #a23;
   box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-  border-right-color: #a23; }
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-  border-left-color: #a23; }
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-  border-bottom-color: #a23; }
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-  border-top-color: #a23; }
-
-.reveal .controls .navigate-left.enabled:hover {
-  border-right-color: #dd5566; }
-
-.reveal .controls .navigate-right.enabled:hover {
-  border-left-color: #dd5566; }
-
-.reveal .controls .navigate-up.enabled:hover {
-  border-bottom-color: #dd5566; }
-
-.reveal .controls .navigate-down.enabled:hover {
-  border-top-color: #dd5566; }
+.reveal .controls {
+  color: #a23; }
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
-  background: rgba(0, 0, 0, 0.2); }
+  background: rgba(0, 0, 0, 0.2);
+  color: #a23; }
 
-.reveal .progress span {
-  background: #a23;
-  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #222; } }
 
 .reveal p {
   font-weight: 300;
   text-shadow: 1px 1px #222; }
 
+section.has-light-background p, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4 {
+  text-shadow: none; }
+
 .reveal h1,
 .reveal h2,
 .reveal h3,

dist/theme/fonts/league-gothic/league-gothic.css

@@ -0,0 +1,10 @@
+@font-face {
+    font-family: 'League Gothic';
+    src: url('./league-gothic.eot');
+    src: url('./league-gothic.eot?#iefix') format('embedded-opentype'),
+         url('./league-gothic.woff') format('woff'),
+         url('./league-gothic.ttf') format('truetype');
+
+    font-weight: normal;
+    font-style: normal;
+}

dist/theme/fonts/source-sans-pro/source-sans-pro.css

@@ -0,0 +1,39 @@
+@font-face {
+    font-family: 'Source Sans Pro';
+    src: url('./source-sans-pro-regular.eot');
+    src: url('./source-sans-pro-regular.eot?#iefix') format('embedded-opentype'),
+         url('./source-sans-pro-regular.woff') format('woff'),
+         url('./source-sans-pro-regular.ttf') format('truetype');
+    font-weight: normal;
+    font-style: normal;
+}
+
+@font-face {
+    font-family: 'Source Sans Pro';
+    src: url('./source-sans-pro-italic.eot');
+    src: url('./source-sans-pro-italic.eot?#iefix') format('embedded-opentype'),
+         url('./source-sans-pro-italic.woff') format('woff'),
+         url('./source-sans-pro-italic.ttf') format('truetype');
+    font-weight: normal;
+    font-style: italic;
+}
+
+@font-face {
+    font-family: 'Source Sans Pro';
+    src: url('./source-sans-pro-semibold.eot');
+    src: url('./source-sans-pro-semibold.eot?#iefix') format('embedded-opentype'),
+         url('./source-sans-pro-semibold.woff') format('woff'),
+         url('./source-sans-pro-semibold.ttf') format('truetype');
+    font-weight: 600;
+    font-style: normal;
+}
+
+@font-face {
+    font-family: 'Source Sans Pro';
+    src: url('./source-sans-pro-semibolditalic.eot');
+    src: url('./source-sans-pro-semibolditalic.eot?#iefix') format('embedded-opentype'),
+         url('./source-sans-pro-semibolditalic.woff') format('woff'),
+         url('./source-sans-pro-semibolditalic.ttf') format('truetype');
+    font-weight: 600;
+    font-style: italic;
+}

dist/theme/league.css

@@ -5,12 +5,40 @@
  *
  * Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se
  */
-@import url(../../lib/font/league-gothic/league-gothic.css);
+@import url(./fonts/league-gothic/league-gothic.css);
 @import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+section.has-light-background, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4, section.has-light-background h5, section.has-light-background h6 {
+  color: #222; }
+
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
-body {
+:root {
+  --background-color: #2b2b2b;
+  --main-font: Lato, sans-serif;
+  --main-font-size: 40px;
+  --main-color: #eee;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: League Gothic, Impact, sans-serif;
+  --heading-color: #eee;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: normal;
+  --heading-text-transform: uppercase;
+  --heading-text-shadow: 0px 0px 6px rgba(0, 0, 0, 0.2);
+  --heading-font-weight: normal;
+  --heading1-text-shadow: 0 1px 0 #ccc, 0 2px 0 #c9c9c9, 0 3px 0 #bbb, 0 4px 0 #b9b9b9, 0 5px 0 #aaa, 0 6px 1px rgba(0, 0, 0, 0.1), 0 0 5px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.3), 0 3px 5px rgba(0, 0, 0, 0.2), 0 5px 10px rgba(0, 0, 0, 0.25), 0 20px 20px rgba(0, 0, 0, 0.15);
+  --heading1-size: 3.77em;
+  --heading2-size: 2.11em;
+  --heading3-size: 1.55em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #13DAEC;
+  --link-color-hover: #71e9f4;
+  --selection-background-color: #FF5E99;
+  --selection-color: #fff; }
+
+.reveal-viewport {
   background: #1c1e20;
   background: -moz-radial-gradient(center, circle cover, #555a5f 0%, #1c1e20 100%);
   background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, #555a5f), color-stop(100%, #1c1e20));
@@ -22,17 +50,22 @@ body {
 
 .reveal {
   font-family: "Lato", sans-serif;
-  font-size: 36px;
+  font-size: 40px;
   font-weight: normal;
   color: #eee; }
 
-::selection {
+.reveal ::selection {
   color: #fff;
   background: #FF5E99;
   text-shadow: none; }
 
-.reveal .slides > section,
-.reveal .slides > section > section {
+.reveal ::-moz-selection {
+  color: #fff;
+  background: #FF5E99;
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
   line-height: 1.3;
   font-weight: inherit; }
 
@@ -77,6 +110,15 @@ body {
   margin: 20px 0;
   line-height: 1.3; }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0; }
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -123,10 +165,6 @@ body {
 .reveal dd {
   margin-left: 40px; }
 
-.reveal q,
-.reveal blockquote {
-  quotes: none; }
-
 .reveal blockquote {
   display: block;
   position: relative;
@@ -154,10 +192,11 @@ body {
   font-family: monospace;
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
 
 .reveal code {
-  font-family: monospace; }
+  font-family: monospace;
+  text-transform: none; }
 
 .reveal pre code {
   display: block;
@@ -193,10 +232,12 @@ body {
   border-bottom: none; }
 
 .reveal sup {
-  vertical-align: super; }
+  vertical-align: super;
+  font-size: smaller; }
 
 .reveal sub {
-  vertical-align: sub; }
+  vertical-align: sub;
+  font-size: smaller; }
 
 .reveal small {
   display: inline-block;
@@ -207,14 +248,15 @@ body {
 .reveal small * {
   vertical-align: top; }
 
+.reveal img {
+  margin: 20px 0; }
+
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
   color: #13DAEC;
   text-decoration: none;
-  -webkit-transition: color .15s ease;
-  -moz-transition: color .15s ease;
   transition: color .15s ease; }
 
 .reveal a:hover {
@@ -227,67 +269,35 @@ body {
   background: #0d99a5; }
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
-.reveal section img {
-  margin: 15px 0px;
-  background: rgba(255, 255, 255, 0.12);
+.reveal .r-frame {
   border: 4px solid #eee;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
-.reveal section img.plain {
-  border: 0;
-  box-shadow: none; }
-
-.reveal a img {
-  -webkit-transition: all .15s linear;
-  -moz-transition: all .15s linear;
+.reveal a .r-frame {
   transition: all .15s linear; }
 
-.reveal a:hover img {
-  background: rgba(255, 255, 255, 0.2);
+.reveal a:hover .r-frame {
   border-color: #13DAEC;
   box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-  border-right-color: #13DAEC; }
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-  border-left-color: #13DAEC; }
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-  border-bottom-color: #13DAEC; }
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-  border-top-color: #13DAEC; }
-
-.reveal .controls .navigate-left.enabled:hover {
-  border-right-color: #71e9f4; }
-
-.reveal .controls .navigate-right.enabled:hover {
-  border-left-color: #71e9f4; }
-
-.reveal .controls .navigate-up.enabled:hover {
-  border-bottom-color: #71e9f4; }
-
-.reveal .controls .navigate-down.enabled:hover {
-  border-top-color: #71e9f4; }
+.reveal .controls {
+  color: #13DAEC; }
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
-  background: rgba(0, 0, 0, 0.2); }
+  background: rgba(0, 0, 0, 0.2);
+  color: #13DAEC; }
 
-.reveal .progress span {
-  background: #13DAEC;
-  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #2b2b2b; } }

dist/theme/moon.css

@@ -2,7 +2,7 @@
  * Solarized Dark theme for reveal.js.
  * Author: Achim Staebler
  */
-@import url(../../lib/font/league-gothic/league-gothic.css);
+@import url(./fonts/league-gothic/league-gothic.css);
 @import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 /**
  * Solarized colors by Ethan Schoonover
@@ -11,26 +11,59 @@ html * {
   color-profile: sRGB;
   rendering-intent: auto; }
 
+section.has-light-background, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4, section.has-light-background h5, section.has-light-background h6 {
+  color: #222; }
+
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
-body {
+:root {
+  --background-color: #002b36;
+  --main-font: Lato, sans-serif;
+  --main-font-size: 40px;
+  --main-color: #93a1a1;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: League Gothic, Impact, sans-serif;
+  --heading-color: #eee8d5;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: normal;
+  --heading-text-transform: uppercase;
+  --heading-text-shadow: none;
+  --heading-font-weight: normal;
+  --heading1-text-shadow: none;
+  --heading1-size: 3.77em;
+  --heading2-size: 2.11em;
+  --heading3-size: 1.55em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #268bd2;
+  --link-color-hover: #78b9e6;
+  --selection-background-color: #d33682;
+  --selection-color: #fff; }
+
+.reveal-viewport {
   background: #002b36;
   background-color: #002b36; }
 
 .reveal {
   font-family: "Lato", sans-serif;
-  font-size: 36px;
+  font-size: 40px;
   font-weight: normal;
   color: #93a1a1; }
 
-::selection {
+.reveal ::selection {
   color: #fff;
   background: #d33682;
   text-shadow: none; }
 
-.reveal .slides > section,
-.reveal .slides > section > section {
+.reveal ::-moz-selection {
+  color: #fff;
+  background: #d33682;
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
   line-height: 1.3;
   font-weight: inherit; }
 
@@ -75,6 +108,15 @@ body {
   margin: 20px 0;
   line-height: 1.3; }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0; }
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -121,10 +163,6 @@ body {
 .reveal dd {
   margin-left: 40px; }
 
-.reveal q,
-.reveal blockquote {
-  quotes: none; }
-
 .reveal blockquote {
   display: block;
   position: relative;
@@ -152,10 +190,11 @@ body {
   font-family: monospace;
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
 
 .reveal code {
-  font-family: monospace; }
+  font-family: monospace;
+  text-transform: none; }
 
 .reveal pre code {
   display: block;
@@ -191,10 +230,12 @@ body {
   border-bottom: none; }
 
 .reveal sup {
-  vertical-align: super; }
+  vertical-align: super;
+  font-size: smaller; }
 
 .reveal sub {
-  vertical-align: sub; }
+  vertical-align: sub;
+  font-size: smaller; }
 
 .reveal small {
   display: inline-block;
@@ -205,14 +246,15 @@ body {
 .reveal small * {
   vertical-align: top; }
 
+.reveal img {
+  margin: 20px 0; }
+
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
   color: #268bd2;
   text-decoration: none;
-  -webkit-transition: color .15s ease;
-  -moz-transition: color .15s ease;
   transition: color .15s ease; }
 
 .reveal a:hover {
@@ -225,67 +267,35 @@ body {
   background: #1a6091; }
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
-.reveal section img {
-  margin: 15px 0px;
-  background: rgba(255, 255, 255, 0.12);
+.reveal .r-frame {
   border: 4px solid #93a1a1;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
-.reveal section img.plain {
-  border: 0;
-  box-shadow: none; }
-
-.reveal a img {
-  -webkit-transition: all .15s linear;
-  -moz-transition: all .15s linear;
+.reveal a .r-frame {
   transition: all .15s linear; }
 
-.reveal a:hover img {
-  background: rgba(255, 255, 255, 0.2);
+.reveal a:hover .r-frame {
   border-color: #268bd2;
   box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-  border-right-color: #268bd2; }
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-  border-left-color: #268bd2; }
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-  border-bottom-color: #268bd2; }
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-  border-top-color: #268bd2; }
-
-.reveal .controls .navigate-left.enabled:hover {
-  border-right-color: #78b9e6; }
-
-.reveal .controls .navigate-right.enabled:hover {
-  border-left-color: #78b9e6; }
-
-.reveal .controls .navigate-up.enabled:hover {
-  border-bottom-color: #78b9e6; }
-
-.reveal .controls .navigate-down.enabled:hover {
-  border-top-color: #78b9e6; }
+.reveal .controls {
+  color: #268bd2; }
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
-  background: rgba(0, 0, 0, 0.2); }
+  background: rgba(0, 0, 0, 0.2);
+  color: #268bd2; }
 
-.reveal .progress span {
-  background: #268bd2;
-  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #002b36; } }

dist/theme/night.css

@@ -5,26 +5,59 @@
  */
 @import url(https://fonts.googleapis.com/css?family=Montserrat:700);
 @import url(https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic,700italic);
+section.has-light-background, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4, section.has-light-background h5, section.has-light-background h6 {
+  color: #222; }
+
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
-body {
+:root {
+  --background-color: #111;
+  --main-font: Open Sans, sans-serif;
+  --main-font-size: 40px;
+  --main-color: #eee;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: Montserrat, Impact, sans-serif;
+  --heading-color: #eee;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: -0.03em;
+  --heading-text-transform: none;
+  --heading-text-shadow: none;
+  --heading-font-weight: normal;
+  --heading1-text-shadow: none;
+  --heading1-size: 3.77em;
+  --heading2-size: 2.11em;
+  --heading3-size: 1.55em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #e7ad52;
+  --link-color-hover: #f3d7ac;
+  --selection-background-color: #e7ad52;
+  --selection-color: #fff; }
+
+.reveal-viewport {
   background: #111;
   background-color: #111; }
 
 .reveal {
   font-family: "Open Sans", sans-serif;
-  font-size: 30px;
+  font-size: 40px;
   font-weight: normal;
   color: #eee; }
 
-::selection {
+.reveal ::selection {
   color: #fff;
   background: #e7ad52;
   text-shadow: none; }
 
-.reveal .slides > section,
-.reveal .slides > section > section {
+.reveal ::-moz-selection {
+  color: #fff;
+  background: #e7ad52;
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
   line-height: 1.3;
   font-weight: inherit; }
 
@@ -69,6 +102,15 @@ body {
   margin: 20px 0;
   line-height: 1.3; }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0; }
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -115,10 +157,6 @@ body {
 .reveal dd {
   margin-left: 40px; }
 
-.reveal q,
-.reveal blockquote {
-  quotes: none; }
-
 .reveal blockquote {
   display: block;
   position: relative;
@@ -146,10 +184,11 @@ body {
   font-family: monospace;
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
 
 .reveal code {
-  font-family: monospace; }
+  font-family: monospace;
+  text-transform: none; }
 
 .reveal pre code {
   display: block;
@@ -185,10 +224,12 @@ body {
   border-bottom: none; }
 
 .reveal sup {
-  vertical-align: super; }
+  vertical-align: super;
+  font-size: smaller; }
 
 .reveal sub {
-  vertical-align: sub; }
+  vertical-align: sub;
+  font-size: smaller; }
 
 .reveal small {
   display: inline-block;
@@ -199,14 +240,15 @@ body {
 .reveal small * {
   vertical-align: top; }
 
+.reveal img {
+  margin: 20px 0; }
+
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
   color: #e7ad52;
   text-decoration: none;
-  -webkit-transition: color .15s ease;
-  -moz-transition: color .15s ease;
   transition: color .15s ease; }
 
 .reveal a:hover {
@@ -219,67 +261,35 @@ body {
   background: #d08a1d; }
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
-.reveal section img {
-  margin: 15px 0px;
-  background: rgba(255, 255, 255, 0.12);
+.reveal .r-frame {
   border: 4px solid #eee;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
-.reveal section img.plain {
-  border: 0;
-  box-shadow: none; }
-
-.reveal a img {
-  -webkit-transition: all .15s linear;
-  -moz-transition: all .15s linear;
+.reveal a .r-frame {
   transition: all .15s linear; }
 
-.reveal a:hover img {
-  background: rgba(255, 255, 255, 0.2);
+.reveal a:hover .r-frame {
   border-color: #e7ad52;
   box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-  border-right-color: #e7ad52; }
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-  border-left-color: #e7ad52; }
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-  border-bottom-color: #e7ad52; }
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-  border-top-color: #e7ad52; }
-
-.reveal .controls .navigate-left.enabled:hover {
-  border-right-color: #f3d7ac; }
-
-.reveal .controls .navigate-right.enabled:hover {
-  border-left-color: #f3d7ac; }
-
-.reveal .controls .navigate-up.enabled:hover {
-  border-bottom-color: #f3d7ac; }
-
-.reveal .controls .navigate-down.enabled:hover {
-  border-top-color: #f3d7ac; }
+.reveal .controls {
+  color: #e7ad52; }
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
-  background: rgba(0, 0, 0, 0.2); }
+  background: rgba(0, 0, 0, 0.2);
+  color: #e7ad52; }
 
-.reveal .progress span {
-  background: #e7ad52;
-  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #111; } }

dist/theme/serif.css

@@ -7,26 +7,59 @@
 .reveal a {
   line-height: 1.3em; }
 
+section.has-dark-background, section.has-dark-background h1, section.has-dark-background h2, section.has-dark-background h3, section.has-dark-background h4, section.has-dark-background h5, section.has-dark-background h6 {
+  color: #fff; }
+
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
-body {
+:root {
+  --background-color: #F0F1EB;
+  --main-font: Palatino Linotype, Book Antiqua, Palatino, FreeSerif, serif;
+  --main-font-size: 40px;
+  --main-color: #000;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: Palatino Linotype, Book Antiqua, Palatino, FreeSerif, serif;
+  --heading-color: #383D3D;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: normal;
+  --heading-text-transform: none;
+  --heading-text-shadow: none;
+  --heading-font-weight: normal;
+  --heading1-text-shadow: none;
+  --heading1-size: 3.77em;
+  --heading2-size: 2.11em;
+  --heading3-size: 1.55em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #51483D;
+  --link-color-hover: #8b7c69;
+  --selection-background-color: #26351C;
+  --selection-color: #fff; }
+
+.reveal-viewport {
   background: #F0F1EB;
   background-color: #F0F1EB; }
 
 .reveal {
   font-family: "Palatino Linotype", "Book Antiqua", Palatino, FreeSerif, serif;
-  font-size: 36px;
+  font-size: 40px;
   font-weight: normal;
   color: #000; }
 
-::selection {
+.reveal ::selection {
   color: #fff;
   background: #26351C;
   text-shadow: none; }
 
-.reveal .slides > section,
-.reveal .slides > section > section {
+.reveal ::-moz-selection {
+  color: #fff;
+  background: #26351C;
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
   line-height: 1.3;
   font-weight: inherit; }
 
@@ -71,6 +104,15 @@ body {
   margin: 20px 0;
   line-height: 1.3; }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0; }
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -117,10 +159,6 @@ body {
 .reveal dd {
   margin-left: 40px; }
 
-.reveal q,
-.reveal blockquote {
-  quotes: none; }
-
 .reveal blockquote {
   display: block;
   position: relative;
@@ -148,10 +186,11 @@ body {
   font-family: monospace;
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
 
 .reveal code {
-  font-family: monospace; }
+  font-family: monospace;
+  text-transform: none; }
 
 .reveal pre code {
   display: block;
@@ -187,10 +226,12 @@ body {
   border-bottom: none; }
 
 .reveal sup {
-  vertical-align: super; }
+  vertical-align: super;
+  font-size: smaller; }
 
 .reveal sub {
-  vertical-align: sub; }
+  vertical-align: sub;
+  font-size: smaller; }
 
 .reveal small {
   display: inline-block;
@@ -201,14 +242,15 @@ body {
 .reveal small * {
   vertical-align: top; }
 
+.reveal img {
+  margin: 20px 0; }
+
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
   color: #51483D;
   text-decoration: none;
-  -webkit-transition: color .15s ease;
-  -moz-transition: color .15s ease;
   transition: color .15s ease; }
 
 .reveal a:hover {
@@ -221,67 +263,35 @@ body {
   background: #25211c; }
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
-.reveal section img {
-  margin: 15px 0px;
-  background: rgba(255, 255, 255, 0.12);
+.reveal .r-frame {
   border: 4px solid #000;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
-.reveal section img.plain {
-  border: 0;
-  box-shadow: none; }
-
-.reveal a img {
-  -webkit-transition: all .15s linear;
-  -moz-transition: all .15s linear;
+.reveal a .r-frame {
   transition: all .15s linear; }
 
-.reveal a:hover img {
-  background: rgba(255, 255, 255, 0.2);
+.reveal a:hover .r-frame {
   border-color: #51483D;
   box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-  border-right-color: #51483D; }
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-  border-left-color: #51483D; }
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-  border-bottom-color: #51483D; }
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-  border-top-color: #51483D; }
-
-.reveal .controls .navigate-left.enabled:hover {
-  border-right-color: #8b7c69; }
-
-.reveal .controls .navigate-right.enabled:hover {
-  border-left-color: #8b7c69; }
-
-.reveal .controls .navigate-up.enabled:hover {
-  border-bottom-color: #8b7c69; }
-
-.reveal .controls .navigate-down.enabled:hover {
-  border-top-color: #8b7c69; }
+.reveal .controls {
+  color: #51483D; }
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
-  background: rgba(0, 0, 0, 0.2); }
+  background: rgba(0, 0, 0, 0.2);
+  color: #51483D; }
 
-.reveal .progress span {
-  background: #51483D;
-  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #F0F1EB; } }

dist/theme/simple.css

@@ -7,26 +7,59 @@
  */
 @import url(https://fonts.googleapis.com/css?family=News+Cycle:400,700);
 @import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+section.has-dark-background, section.has-dark-background h1, section.has-dark-background h2, section.has-dark-background h3, section.has-dark-background h4, section.has-dark-background h5, section.has-dark-background h6 {
+  color: #fff; }
+
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
-body {
+:root {
+  --background-color: #fff;
+  --main-font: Lato, sans-serif;
+  --main-font-size: 40px;
+  --main-color: #000;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: News Cycle, Impact, sans-serif;
+  --heading-color: #000;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: normal;
+  --heading-text-transform: none;
+  --heading-text-shadow: none;
+  --heading-font-weight: normal;
+  --heading1-text-shadow: none;
+  --heading1-size: 3.77em;
+  --heading2-size: 2.11em;
+  --heading3-size: 1.55em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #00008B;
+  --link-color-hover: #0000f1;
+  --selection-background-color: rgba(0, 0, 0, 0.99);
+  --selection-color: #fff; }
+
+.reveal-viewport {
   background: #fff;
   background-color: #fff; }
 
 .reveal {
   font-family: "Lato", sans-serif;
-  font-size: 36px;
+  font-size: 40px;
   font-weight: normal;
   color: #000; }
 
-::selection {
+.reveal ::selection {
   color: #fff;
   background: rgba(0, 0, 0, 0.99);
   text-shadow: none; }
 
-.reveal .slides > section,
-.reveal .slides > section > section {
+.reveal ::-moz-selection {
+  color: #fff;
+  background: rgba(0, 0, 0, 0.99);
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
   line-height: 1.3;
   font-weight: inherit; }
 
@@ -71,6 +104,15 @@ body {
   margin: 20px 0;
   line-height: 1.3; }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0; }
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -117,10 +159,6 @@ body {
 .reveal dd {
   margin-left: 40px; }
 
-.reveal q,
-.reveal blockquote {
-  quotes: none; }
-
 .reveal blockquote {
   display: block;
   position: relative;
@@ -148,10 +186,11 @@ body {
   font-family: monospace;
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
 
 .reveal code {
-  font-family: monospace; }
+  font-family: monospace;
+  text-transform: none; }
 
 .reveal pre code {
   display: block;
@@ -187,10 +226,12 @@ body {
   border-bottom: none; }
 
 .reveal sup {
-  vertical-align: super; }
+  vertical-align: super;
+  font-size: smaller; }
 
 .reveal sub {
-  vertical-align: sub; }
+  vertical-align: sub;
+  font-size: smaller; }
 
 .reveal small {
   display: inline-block;
@@ -201,14 +242,15 @@ body {
 .reveal small * {
   vertical-align: top; }
 
+.reveal img {
+  margin: 20px 0; }
+
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
   color: #00008B;
   text-decoration: none;
-  -webkit-transition: color .15s ease;
-  -moz-transition: color .15s ease;
   transition: color .15s ease; }
 
 .reveal a:hover {
@@ -221,67 +263,35 @@ body {
   background: #00003f; }
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
-.reveal section img {
-  margin: 15px 0px;
-  background: rgba(255, 255, 255, 0.12);
+.reveal .r-frame {
   border: 4px solid #000;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
-.reveal section img.plain {
-  border: 0;
-  box-shadow: none; }
-
-.reveal a img {
-  -webkit-transition: all .15s linear;
-  -moz-transition: all .15s linear;
+.reveal a .r-frame {
   transition: all .15s linear; }
 
-.reveal a:hover img {
-  background: rgba(255, 255, 255, 0.2);
+.reveal a:hover .r-frame {
   border-color: #00008B;
   box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-  border-right-color: #00008B; }
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-  border-left-color: #00008B; }
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-  border-bottom-color: #00008B; }
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-  border-top-color: #00008B; }
-
-.reveal .controls .navigate-left.enabled:hover {
-  border-right-color: #0000f1; }
-
-.reveal .controls .navigate-right.enabled:hover {
-  border-left-color: #0000f1; }
-
-.reveal .controls .navigate-up.enabled:hover {
-  border-bottom-color: #0000f1; }
-
-.reveal .controls .navigate-down.enabled:hover {
-  border-top-color: #0000f1; }
+.reveal .controls {
+  color: #00008B; }
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
-  background: rgba(0, 0, 0, 0.2); }
+  background: rgba(0, 0, 0, 0.2);
+  color: #00008B; }
 
-.reveal .progress span {
-  background: #00008B;
-  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #fff; } }

dist/theme/sky.css

@@ -8,10 +8,38 @@
 .reveal a {
   line-height: 1.3em; }
 
+section.has-dark-background, section.has-dark-background h1, section.has-dark-background h2, section.has-dark-background h3, section.has-dark-background h4, section.has-dark-background h5, section.has-dark-background h6 {
+  color: #fff; }
+
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
-body {
+:root {
+  --background-color: #f7fbfc;
+  --main-font: Open Sans, sans-serif;
+  --main-font-size: 40px;
+  --main-color: #333;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: Quicksand, sans-serif;
+  --heading-color: #333;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: -0.08em;
+  --heading-text-transform: uppercase;
+  --heading-text-shadow: none;
+  --heading-font-weight: normal;
+  --heading1-text-shadow: none;
+  --heading1-size: 3.77em;
+  --heading2-size: 2.11em;
+  --heading3-size: 1.55em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #3b759e;
+  --link-color-hover: #74a7cb;
+  --selection-background-color: #134674;
+  --selection-color: #fff; }
+
+.reveal-viewport {
   background: #add9e4;
   background: -moz-radial-gradient(center, circle cover, #f7fbfc 0%, #add9e4 100%);
   background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, #f7fbfc), color-stop(100%, #add9e4));
@@ -23,17 +51,22 @@ body {
 
 .reveal {
   font-family: "Open Sans", sans-serif;
-  font-size: 36px;
+  font-size: 40px;
   font-weight: normal;
   color: #333; }
 
-::selection {
+.reveal ::selection {
   color: #fff;
   background: #134674;
   text-shadow: none; }
 
-.reveal .slides > section,
-.reveal .slides > section > section {
+.reveal ::-moz-selection {
+  color: #fff;
+  background: #134674;
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
   line-height: 1.3;
   font-weight: inherit; }
 
@@ -78,6 +111,15 @@ body {
   margin: 20px 0;
   line-height: 1.3; }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0; }
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -124,10 +166,6 @@ body {
 .reveal dd {
   margin-left: 40px; }
 
-.reveal q,
-.reveal blockquote {
-  quotes: none; }
-
 .reveal blockquote {
   display: block;
   position: relative;
@@ -155,10 +193,11 @@ body {
   font-family: monospace;
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
 
 .reveal code {
-  font-family: monospace; }
+  font-family: monospace;
+  text-transform: none; }
 
 .reveal pre code {
   display: block;
@@ -194,10 +233,12 @@ body {
   border-bottom: none; }
 
 .reveal sup {
-  vertical-align: super; }
+  vertical-align: super;
+  font-size: smaller; }
 
 .reveal sub {
-  vertical-align: sub; }
+  vertical-align: sub;
+  font-size: smaller; }
 
 .reveal small {
   display: inline-block;
@@ -208,14 +249,15 @@ body {
 .reveal small * {
   vertical-align: top; }
 
+.reveal img {
+  margin: 20px 0; }
+
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
   color: #3b759e;
   text-decoration: none;
-  -webkit-transition: color .15s ease;
-  -moz-transition: color .15s ease;
   transition: color .15s ease; }
 
 .reveal a:hover {
@@ -228,67 +270,35 @@ body {
   background: #264c66; }
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
-.reveal section img {
-  margin: 15px 0px;
-  background: rgba(255, 255, 255, 0.12);
+.reveal .r-frame {
   border: 4px solid #333;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
-.reveal section img.plain {
-  border: 0;
-  box-shadow: none; }
-
-.reveal a img {
-  -webkit-transition: all .15s linear;
-  -moz-transition: all .15s linear;
+.reveal a .r-frame {
   transition: all .15s linear; }
 
-.reveal a:hover img {
-  background: rgba(255, 255, 255, 0.2);
+.reveal a:hover .r-frame {
   border-color: #3b759e;
   box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-  border-right-color: #3b759e; }
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-  border-left-color: #3b759e; }
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-  border-bottom-color: #3b759e; }
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-  border-top-color: #3b759e; }
-
-.reveal .controls .navigate-left.enabled:hover {
-  border-right-color: #74a7cb; }
-
-.reveal .controls .navigate-right.enabled:hover {
-  border-left-color: #74a7cb; }
-
-.reveal .controls .navigate-up.enabled:hover {
-  border-bottom-color: #74a7cb; }
-
-.reveal .controls .navigate-down.enabled:hover {
-  border-top-color: #74a7cb; }
+.reveal .controls {
+  color: #3b759e; }
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
-  background: rgba(0, 0, 0, 0.2); }
+  background: rgba(0, 0, 0, 0.2);
+  color: #3b759e; }
 
-.reveal .progress span {
-  background: #3b759e;
-  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #f7fbfc; } }

dist/theme/solarized.css

@@ -2,7 +2,7 @@
  * Solarized Light theme for reveal.js.
  * Author: Achim Staebler
  */
-@import url(../../lib/font/league-gothic/league-gothic.css);
+@import url(./fonts/league-gothic/league-gothic.css);
 @import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 /**
  * Solarized colors by Ethan Schoonover
@@ -14,23 +14,53 @@ html * {
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
-body {
+:root {
+  --background-color: #fdf6e3;
+  --main-font: Lato, sans-serif;
+  --main-font-size: 40px;
+  --main-color: #657b83;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: League Gothic, Impact, sans-serif;
+  --heading-color: #586e75;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: normal;
+  --heading-text-transform: uppercase;
+  --heading-text-shadow: none;
+  --heading-font-weight: normal;
+  --heading1-text-shadow: none;
+  --heading1-size: 3.77em;
+  --heading2-size: 2.11em;
+  --heading3-size: 1.55em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #268bd2;
+  --link-color-hover: #78b9e6;
+  --selection-background-color: #d33682;
+  --selection-color: #fff; }
+
+.reveal-viewport {
   background: #fdf6e3;
   background-color: #fdf6e3; }
 
 .reveal {
   font-family: "Lato", sans-serif;
-  font-size: 36px;
+  font-size: 40px;
   font-weight: normal;
   color: #657b83; }
 
-::selection {
+.reveal ::selection {
   color: #fff;
   background: #d33682;
   text-shadow: none; }
 
-.reveal .slides > section,
-.reveal .slides > section > section {
+.reveal ::-moz-selection {
+  color: #fff;
+  background: #d33682;
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
   line-height: 1.3;
   font-weight: inherit; }
 
@@ -75,6 +105,15 @@ body {
   margin: 20px 0;
   line-height: 1.3; }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0; }
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -121,10 +160,6 @@ body {
 .reveal dd {
   margin-left: 40px; }
 
-.reveal q,
-.reveal blockquote {
-  quotes: none; }
-
 .reveal blockquote {
   display: block;
   position: relative;
@@ -152,10 +187,11 @@ body {
   font-family: monospace;
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
 
 .reveal code {
-  font-family: monospace; }
+  font-family: monospace;
+  text-transform: none; }
 
 .reveal pre code {
   display: block;
@@ -191,10 +227,12 @@ body {
   border-bottom: none; }
 
 .reveal sup {
-  vertical-align: super; }
+  vertical-align: super;
+  font-size: smaller; }
 
 .reveal sub {
-  vertical-align: sub; }
+  vertical-align: sub;
+  font-size: smaller; }
 
 .reveal small {
   display: inline-block;
@@ -205,14 +243,15 @@ body {
 .reveal small * {
   vertical-align: top; }
 
+.reveal img {
+  margin: 20px 0; }
+
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
   color: #268bd2;
   text-decoration: none;
-  -webkit-transition: color .15s ease;
-  -moz-transition: color .15s ease;
   transition: color .15s ease; }
 
 .reveal a:hover {
@@ -225,67 +264,35 @@ body {
   background: #1a6091; }
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
-.reveal section img {
-  margin: 15px 0px;
-  background: rgba(255, 255, 255, 0.12);
+.reveal .r-frame {
   border: 4px solid #657b83;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
-.reveal section img.plain {
-  border: 0;
-  box-shadow: none; }
-
-.reveal a img {
-  -webkit-transition: all .15s linear;
-  -moz-transition: all .15s linear;
+.reveal a .r-frame {
   transition: all .15s linear; }
 
-.reveal a:hover img {
-  background: rgba(255, 255, 255, 0.2);
+.reveal a:hover .r-frame {
   border-color: #268bd2;
   box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-  border-right-color: #268bd2; }
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-  border-left-color: #268bd2; }
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-  border-bottom-color: #268bd2; }
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-  border-top-color: #268bd2; }
-
-.reveal .controls .navigate-left.enabled:hover {
-  border-right-color: #78b9e6; }
-
-.reveal .controls .navigate-right.enabled:hover {
-  border-left-color: #78b9e6; }
-
-.reveal .controls .navigate-up.enabled:hover {
-  border-bottom-color: #78b9e6; }
-
-.reveal .controls .navigate-down.enabled:hover {
-  border-top-color: #78b9e6; }
+.reveal .controls {
+  color: #268bd2; }
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
-  background: rgba(0, 0, 0, 0.2); }
+  background: rgba(0, 0, 0, 0.2);
+  color: #268bd2; }
 
-.reveal .progress span {
-  background: #268bd2;
-  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #fdf6e3; } }

dist/theme/white.css

@@ -3,30 +3,60 @@
  *
  * By Hakim El Hattab, http://hakim.se
  */
-@import url(../../lib/font/source-sans-pro/source-sans-pro.css);
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
 section.has-dark-background, section.has-dark-background h1, section.has-dark-background h2, section.has-dark-background h3, section.has-dark-background h4, section.has-dark-background h5, section.has-dark-background h6 {
   color: #fff; }
 
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
-body {
+:root {
+  --background-color: #fff;
+  --main-font: Source Sans Pro, Helvetica, sans-serif;
+  --main-font-size: 42px;
+  --main-color: #222;
+  --block-margin: 20px;
+  --heading-margin: 0 0 20px 0;
+  --heading-font: Source Sans Pro, Helvetica, sans-serif;
+  --heading-color: #222;
+  --heading-line-height: 1.2;
+  --heading-letter-spacing: normal;
+  --heading-text-transform: uppercase;
+  --heading-text-shadow: none;
+  --heading-font-weight: 600;
+  --heading1-text-shadow: none;
+  --heading1-size: 2.5em;
+  --heading2-size: 1.6em;
+  --heading3-size: 1.3em;
+  --heading4-size: 1em;
+  --code-font: monospace;
+  --link-color: #2a76dd;
+  --link-color-hover: #6ca0e8;
+  --selection-background-color: #98bdef;
+  --selection-color: #fff; }
+
+.reveal-viewport {
   background: #fff;
   background-color: #fff; }
 
 .reveal {
   font-family: "Source Sans Pro", Helvetica, sans-serif;
-  font-size: 38px;
+  font-size: 42px;
   font-weight: normal;
   color: #222; }
 
-::selection {
+.reveal ::selection {
   color: #fff;
   background: #98bdef;
   text-shadow: none; }
 
-.reveal .slides > section,
-.reveal .slides > section > section {
+.reveal ::-moz-selection {
+  color: #fff;
+  background: #98bdef;
+  text-shadow: none; }
+
+.reveal .slides section,
+.reveal .slides section > section {
   line-height: 1.3;
   font-weight: inherit; }
 
@@ -71,6 +101,15 @@ body {
   margin: 20px 0;
   line-height: 1.3; }
 
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0; }
+
 /* Ensure certain elements are never larger than the slide itself */
 .reveal img,
 .reveal video,
@@ -117,10 +156,6 @@ body {
 .reveal dd {
   margin-left: 40px; }
 
-.reveal q,
-.reveal blockquote {
-  quotes: none; }
-
 .reveal blockquote {
   display: block;
   position: relative;
@@ -148,10 +183,11 @@ body {
   font-family: monospace;
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
 
 .reveal code {
-  font-family: monospace; }
+  font-family: monospace;
+  text-transform: none; }
 
 .reveal pre code {
   display: block;
@@ -187,10 +223,12 @@ body {
   border-bottom: none; }
 
 .reveal sup {
-  vertical-align: super; }
+  vertical-align: super;
+  font-size: smaller; }
 
 .reveal sub {
-  vertical-align: sub; }
+  vertical-align: sub;
+  font-size: smaller; }
 
 .reveal small {
   display: inline-block;
@@ -201,14 +239,15 @@ body {
 .reveal small * {
   vertical-align: top; }
 
+.reveal img {
+  margin: 20px 0; }
+
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
   color: #2a76dd;
   text-decoration: none;
-  -webkit-transition: color .15s ease;
-  -moz-transition: color .15s ease;
   transition: color .15s ease; }
 
 .reveal a:hover {
@@ -221,67 +260,35 @@ body {
   background: #1a53a1; }
 
 /*********************************************
- * IMAGES
+ * Frame helper
  *********************************************/
-.reveal section img {
-  margin: 15px 0px;
-  background: rgba(255, 255, 255, 0.12);
+.reveal .r-frame {
   border: 4px solid #222;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
-.reveal section img.plain {
-  border: 0;
-  box-shadow: none; }
-
-.reveal a img {
-  -webkit-transition: all .15s linear;
-  -moz-transition: all .15s linear;
+.reveal a .r-frame {
   transition: all .15s linear; }
 
-.reveal a:hover img {
-  background: rgba(255, 255, 255, 0.2);
+.reveal a:hover .r-frame {
   border-color: #2a76dd;
   box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
-.reveal .controls .navigate-left,
-.reveal .controls .navigate-left.enabled {
-  border-right-color: #2a76dd; }
-
-.reveal .controls .navigate-right,
-.reveal .controls .navigate-right.enabled {
-  border-left-color: #2a76dd; }
-
-.reveal .controls .navigate-up,
-.reveal .controls .navigate-up.enabled {
-  border-bottom-color: #2a76dd; }
-
-.reveal .controls .navigate-down,
-.reveal .controls .navigate-down.enabled {
-  border-top-color: #2a76dd; }
-
-.reveal .controls .navigate-left.enabled:hover {
-  border-right-color: #6ca0e8; }
-
-.reveal .controls .navigate-right.enabled:hover {
-  border-left-color: #6ca0e8; }
-
-.reveal .controls .navigate-up.enabled:hover {
-  border-bottom-color: #6ca0e8; }
-
-.reveal .controls .navigate-down.enabled:hover {
-  border-top-color: #6ca0e8; }
+.reveal .controls {
+  color: #2a76dd; }
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
-  background: rgba(0, 0, 0, 0.2); }
+  background: rgba(0, 0, 0, 0.2);
+  color: #2a76dd; }
 
-.reveal .progress span {
-  background: #2a76dd;
-  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
-  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: #fff; } }

examples/assets/beeping.txt

@@ -0,0 +1,2 @@
+Source: https://freesound.org/people/fennelliott/sounds/379419/
+License: CC0 (public domain)

examples/auto-animate.html

@@ -0,0 +1,176 @@
+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - Auto Animate</title>
+
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../dist/theme/black.css" id="theme">
+		<link rel="stylesheet" href="../plugin/highlight/monokai.css">
+	</head>
+
+	<body>
+
+		<div class="reveal">
+
+			<div class="slides">
+
+				<section data-auto-animate data-auto-animate-unmatched="fade">
+					<h3>Auto-Animate Example</h3>
+					<p>This will fade out</p>
+					<img src="assets/image1.png" style="height: 100px;">
+					<pre data-id="code"><code data-line-numbers class="hljs" data-trim>
+						function Example() {
+						  const [count, setCount] = useState(0);
+						}
+					</code></pre>
+				</section>
+				<section data-auto-animate data-auto-animate-unmatched="fade">
+					<h3>Auto-Animate Example</h3>
+					<p style="opacity: 0.2; margin-top: 100px;">This will fade out</p>
+					<p>This element is unmatched</p>
+					<img src="assets/image1.png" style="height: 150px;">
+					<pre data-id="code"><code data-line-numbers class="hljs" data-trim>
+						function Example() {
+						  New line!
+						  const [count, setCount] = useState(0);
+						}
+					</code></pre>
+				</section>
+
+				<section data-auto-animate>
+					<p data-id="text-props" style="background: #555; line-height: 1em; letter-spacing: 0em;">Line Height & Letter Spacing</p>
+				</section>
+				<section data-auto-animate>
+					<p data-id="text-props" style="background: #555; line-height: 3em; letter-spacing: 0.2em;">Line Height & Letter Spacing</p>
+				</section>
+
+				<section>
+					<section data-auto-animate>
+						<pre data-id="code"><code data-line-numbers class="hljs" data-trim>
+							import React, { useState } from 'react';
+
+							function Example() {
+							  const [count, setCount] = useState(0);
+
+							  return (
+							    ...
+							  );
+							}
+						</code></pre>
+					</section>
+					<section data-auto-animate>
+						<pre data-id="code"><code data-line-numbers class="hljs" data-trim>
+							function Example() {
+							  const [count, setCount] = useState(0);
+
+							  return (
+							    &lt;div&gt;
+							      &lt;p&gt;You clicked {count} times&lt;/p&gt;
+							      &lt;button onClick={() =&gt; setCount(count + 1)}&gt;
+							        Click me
+							      &lt;/button&gt;
+							    &lt;/div&gt;
+							  );
+							}
+						</code></pre>
+					</section>
+					<section data-auto-animate>
+						<pre data-id="code"><code data-line-numbers class="hljs" data-trim>
+							function Example() {
+							  // A comment!
+							  const [count, setCount] = useState(0);
+
+							  return (
+							    &lt;div&gt;
+							      &lt;p&gt;You clicked {count} times&lt;/p&gt;
+							      &lt;button onClick={() =&gt; setCount(count + 1)}&gt;
+							        Click me
+							      &lt;/button&gt;
+							    &lt;/div&gt;
+							  );
+							}
+						</code></pre>
+					</section>
+				</section>
+
+				<section>
+					<section data-auto-animate>
+						<h3>Swapping list items</h3>
+						<ul>
+							<li>One</li>
+							<li>Two</li>
+							<li>Three</li>
+						</ul>
+					</section>
+					<section data-auto-animate>
+						<h3>Swapping list items</h3>
+						<ul>
+							<li>Two</li>
+							<li>One</li>
+							<li>Three</li>
+						</ul>
+					</section>
+					<section data-auto-animate>
+						<h3>Swapping list items</h3>
+						<ul>
+							<li>Two</li>
+							<li>Three</li>
+							<li>One</li>
+						</ul>
+					</section>
+				</section>
+
+				<section data-auto-animate style="height: 600px">
+					<h3 style="opacity: 0.3; font-size: 18px;">SLIDE 1</h2>
+					<h2 data-id="title" style="margin-top: 260px;">Animate Anything</h2>
+					<div data-id="1" style="background: white; position: absolute; top: 150px; left: 16%; width: 60px; height: 60px;"></div>
+					<div data-id="2" style="background: white; position: absolute; top: 150px; left: 36%; width: 60px; height: 60px;"></div>
+					<div data-id="3" style="background: white; position: absolute; top: 150px; left: 56%; width: 60px; height: 60px;"></div>
+					<div data-id="4" style="background: white; position: absolute; top: 150px; left: 76%; width: 60px; height: 60px;"></div>
+				</section>
+				<section data-auto-animate style="height: 600px">
+					<h3 style="opacity: 0.3; font-size: 18px;">SLIDE 2</h2>
+					<h2 data-id="title" style="margin-top: 500px">With Auto Animate</h2>
+					<div data-id="1" style="background: cyan; position: absolute; bottom: 190px; left: 16%; width: 60px; height: 60px;"></div>
+					<div data-id="2" style="background: magenta; position: absolute; bottom: 190px; left: 36%; width: 60px; height: 160px;"></div>
+					<div data-id="3" style="background: yellow; position: absolute; bottom: 190px; left: 56%; width: 60px; height: 260px;"></div>
+					<div data-id="4" style="background: red; position: absolute; bottom: 190px; left: 76%; width: 60px; height: 360px;"></div>
+				</section>
+				<section data-auto-animate style="height: 600px">
+					<h3 style="opacity: 0.3; font-size: 18px;">SLIDE 3</h2>
+					<h2 data-id="title" style="margin-top: 500px; opacity: 0;">With Auto Animate</h2>
+					<div data-id="1" style="background: cyan; position: absolute; top: 50%; left: 50%; width: 400px; height: 400px; margin: -200px 0 0 -200px; border-radius: 400px;"></div>
+					<div data-id="2" style="background: magenta; position: absolute; top: 50%; left: 50%; width: 300px; height: 300px; margin: -150px 0 0 -150px; border-radius: 400px;"></div>
+					<div data-id="3" style="background: yellow; position: absolute; top: 50%; left: 50%; width: 200px; height: 200px; margin: -100px 0 0 -100px; border-radius: 400px;"></div>
+					<div data-id="4" style="background: red; position: absolute; top: 50%; left: 50%; width: 100px; height: 100px; margin: -50px 0 0 -50px; border-radius: 400px;"></div>
+				</section>
+				<section data-auto-animate style="height: 600px">
+					<h3 style="opacity: 0.3; font-size: 18px;">SLIDE 3</h2>
+					<h2 data-id="title" style="margin-top: 500px; opacity: 0;">With Auto Animate</h2>
+					<div data-id="1" style="background: red; position: absolute; top: 250px; left: 16%; width: 60px; height: 60px;"></div>
+					<div data-id="2" style="background: yellow; position: absolute; top: 250px; left: 36%; width: 60px; height: 60px;"></div>
+					<div data-id="3" style="background: magenta; position: absolute; top: 250px; left: 56%; width: 60px; height: 60px;"></div>
+					<div data-id="4" style="background: cyan; position: absolute; top: 250px; left: 76%; width: 60px; height: 60px;"></div>
+				</section>
+
+			</div>
+
+		</div>
+
+		<script src="../dist/reveal.js"></script>
+		<script src="../plugin/highlight/highlight.js"></script>
+		<script>
+			Reveal.initialize({
+				center: true,
+				hash: true,
+				plugins: [ RevealHighlight ]
+			});
+		</script>
+
+	</body>
+</html>

examples/backgrounds.html

@@ -8,8 +8,8 @@
 
 		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
 
-		<link rel="stylesheet" href="../../css/reveal.css">
-		<link rel="stylesheet" href="../../css/theme/serif.css" id="theme">
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../dist/theme/serif.css" id="theme">
 		<style type="text/css" media="screen">
 			.slides section.has-dark-background,
 			.slides section.has-dark-background h2 {
@@ -122,16 +122,13 @@
 
 		</div>
 
-		<script src="../../lib/js/head.min.js"></script>
-		<script src="../../js/reveal.js"></script>
-
+		<script src="../dist/reveal.js"></script>
 		<script>
 
-			// Full list of configuration options available here:
-			// https://github.com/hakimel/reveal.js#configuration
+			// Full list of configuration options:
+			// https://revealjs.revealjs.com/config/
 			Reveal.initialize({
 				center: true,
-				// rtl: true,
 
 				transition: 'linear',
 				// transitionSpeed: 'slow',

examples/barebones.html

@@ -1,18 +1,13 @@
 <!doctype html>
 <html lang="en">
-
 	<head>
 		<meta charset="utf-8">
-
 		<title>reveal.js - Barebones</title>
-
-		<link rel="stylesheet" href="../../css/reveal.css">
+		<link rel="stylesheet" href="../dist/reveal.css">
 	</head>
-
 	<body>
 
 		<div class="reveal">
-
 			<div class="slides">
 
 				<section>
@@ -26,15 +21,11 @@
 				</section>
 
 			</div>
-
 		</div>
 
-		<script src="../../js/reveal.js"></script>
-
+		<script src="../dist/reveal.js"></script>
 		<script>
-
 			Reveal.initialize();
-
 		</script>
 
 	</body>

examples/layout-helpers.html

@@ -0,0 +1,160 @@
+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - Layout Helpers</title>
+
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../dist/theme/white.css" id="theme">
+		<link rel="stylesheet" href="../plugin/highlight/monokai.css">
+	</head>
+
+	<body>
+
+		<div class="reveal">
+
+			<div class="slides">
+
+				<section>
+					<h2>Layout Helper Examples</h2>
+					<ul>
+						<li><a href="#/fit-text">Big Text</a></li>
+						<li><a href="#/stretch">Stretch</a></li>
+						<li><a href="#/stack">Stack</a></li>
+						<li><a href="#/hstack">HStack</a></li>
+						<li><a href="#/vstack">VStack</a></li>
+					</ul>
+				</section>
+
+				<section id="fit-text">
+					<h2>Fit Text</h2>
+					<p>Resizes text to be as large as possible within its container.</p>
+					<pre><code class="html" data-trim data-line-numbers>
+					  <h2 class="r-fit-text">FIT</h2>
+					</code></pre>
+				</section>
+
+				<section>
+					<h2 class="r-fit-text">FIT</h2>
+				</section>
+
+				<section>
+					<h2 class="r-fit-text">HELLO WORLD</h2>
+					<h2 class="r-fit-text">BOTH THESE TITLES USE FIT-TEXT</h2>
+				</section>
+
+				<section id="stretch">
+					<h2>Stretch</h2>
+					<p>Makes an element as tall as possible while remaining within the slide bounds.</p>
+					<pre><code class="html" data-trim data-line-numbers>
+					  <h2>Stretch Example</h2>
+					  <img src="assets/image2.png" class="r-stretch">
+					  <p>Image byline</p>
+					</code></pre>
+				</section>
+
+				<section>
+					<h2>Stretch Example</h2>
+					<img src="assets/image2.png" class="r-stretch">
+					<p>Image byline</p>
+				</section>
+
+				<section id="stack">
+					<h2>Stack</h2>
+					<p>Stacks multiple elements on top of each other, for use with fragments.</p>
+					<pre><code class="html" data-trim data-line-numbers>
+					  <div class="r-stack">
+					    &lt;img class="fragment" width="450" height="300" src="..."&gt;
+					    &lt;img class="fragment" width="300" height="450" src="..."&gt;
+					    &lt;img class="fragment" width="400" height="400" src="..."&gt;
+					  </div>
+					</code></pre>
+				</section>
+
+				<section>
+					<h2>Stack Example</h2>
+					<div class="r-stack">
+						<p class="fragment fade-in-then-out">One</p>
+						<p class="fragment fade-in-then-out">Two</p>
+						<p class="fragment fade-in-then-out">Three</p>
+						<p class="fragment fade-in-then-out">Four</p>
+					</div>
+					<div class="r-stack">
+						<img src="https://placekitten.com/450/300" width="450" height="300" class="fragment">
+						<img src="https://placekitten.com/300/450" width="300" height="450" class="fragment">
+						<img src="https://placekitten.com/400/400" width="400" height="400" class="fragment">
+					</div>
+				</section>
+
+				<section>
+					<h2>Stack Example</h2>
+					<p>fade-in-then-out fragments</p>
+					<div class="r-stack">
+						<img src="https://placekitten.com/450/300" width="450" height="300" class="fragment fade-in-then-out">
+						<img src="https://placekitten.com/300/450" width="300" height="450" class="fragment fade-in-then-out">
+						<img src="https://placekitten.com/400/400" width="400" height="400" class="fragment fade-in-then-out">
+					</div>
+				</section>
+
+				<section id="hstack">
+					<h2>HStack</h2>
+					<p>Stacks multiple elements horizontally.</p>
+					<pre><code class="html" data-trim data-line-numbers>
+					  <div class="r-hstack">
+					    &lt;img width="450" height="300" src="..."&gt;
+					    &lt;img width="300" height="450" src="..."&gt;
+					    &lt;img width="400" height="400" src="..."&gt;
+					  </div>
+					</code></pre>
+				</section>
+
+				<section data-auto-animate>
+					<h2>HStack Example</h2>
+					<div class="r-hstack">
+						<p style="padding: 0.50em; background: #eee; margin: 0.25em">One</p>
+						<p style="padding: 0.75em; background: #eee; margin: 0.25em">Two</p>
+						<p style="padding: 1.00em; background: #eee; margin: 0.25em">Three</p>
+					</div>
+				</section>
+
+				<section id="vstack">
+					<h2>VStack</h2>
+					<p>Stacks multiple elements horizontally.</p>
+					<pre><code class="html" data-trim data-line-numbers>
+					  <div class="r-vstack">
+					    &lt;img width="450" height="300" src="..."&gt;
+					    &lt;img width="300" height="450" src="..."&gt;
+					    &lt;img width="400" height="400" src="..."&gt;
+					  </div>
+					</code></pre>
+				</section>
+
+				<section data-auto-animate>
+					<h2>VStack Example</h2>
+					<div class="r-vstack">
+						<p style="padding: 0.50em; background: #eee; margin: 0.25em">One</p>
+						<p style="padding: 0.75em; background: #eee; margin: 0.25em">Two</p>
+						<p style="padding: 1.00em; background: #eee; margin: 0.25em">Three</p>
+					</div>
+				</section>
+
+			</div>
+
+		</div>
+
+		<script src="../dist/reveal.js"></script>
+		<script src="../plugin/highlight/highlight.js"></script>
+		<script>
+			Reveal.initialize({
+				center: true,
+				hash: true,
+				plugins: [ RevealHighlight ]
+			});
+		</script>
+
+	</body>
+</html>

examples/markdown.html

@@ -4,12 +4,12 @@
 	<head>
 		<meta charset="utf-8">
 
-		<title>reveal.js - Markdown Demo</title>
+		<title>reveal.js - Markdown Example</title>
 
-		<link rel="stylesheet" href="../../css/reveal.css">
-		<link rel="stylesheet" href="../../css/theme/white.css" id="theme">
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../dist/theme/white.css" id="theme">
 
-        <link rel="stylesheet" href="../../lib/css/zenburn.css">
+        <link rel="stylesheet" href="../plugin/highlight/monokai.css">
 	</head>
 
 	<body>
@@ -19,7 +19,7 @@
 			<div class="slides">
 
                 <!-- Use external markdown resource, separate slides by three newlines; vertical slides by two newlines -->
-                <section data-markdown="example.md" data-separator="^\n\n\n" data-separator-vertical="^\n\n"></section>
+                <section data-markdown="markdown.md" data-separator="^\n\n\n" data-separator-vertical="^\n\n"></section>
 
                 <!-- Slides are separated by three dashes (quick 'n dirty regular expression) -->
                 <section data-markdown data-separator="---">
@@ -88,7 +88,7 @@
                 <!-- Code -->
                 <section data-markdown>
                     <script type="text/template">
-                        ```php
+                        ```php [1|3-5]
                         public function foo()
                         {
                             $foo = array(
@@ -99,11 +99,20 @@
                     </script>
                 </section>
 
+                <!-- Images -->
+                <section data-markdown>
+                    <script type="text/template">
+                        ![Sample image](https://s3.amazonaws.com/static.slid.es/logo/v2/slides-symbol-512x512.png)
+                    </script>
+                </section>
+
             </div>
 		</div>
 
-		<script src="../../lib/js/head.min.js"></script>
-		<script src="../../js/reveal.js"></script>
+		<script src="../dist/reveal.js"></script>
+        <script src="../plugin/markdown/markdown.js"></script>
+        <script src="../plugin/highlight/highlight.js"></script>
+        <script src="../plugin/notes/notes.js"></script>
 
 		<script>
 
@@ -113,14 +122,7 @@
 				history: true,
 				center: true,
 
-				// Optional libraries used to extend on reveal.js
-				dependencies: [
-					{ src: '../../lib/js/classList.js', condition: function() { return !document.body.classList; } },
-					{ src: 'marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
-                    { src: 'markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
-                    { src: '../highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
-					{ src: '../notes/notes.js' }
-				]
+				plugins: [ RevealMarkdown, RevealHighlight, RevealNotes ]
 			});
 
 		</script>

examples/markdown.md

@@ -29,3 +29,8 @@ Content 3.1
 ## External 3.2
 
 Content 3.2
+
+
+## External 3.3
+
+![External Image](https://s3.amazonaws.com/static.slid.es/logo/v2/slides-symbol-512x512.png)

examples/math.html

@@ -8,8 +8,8 @@
 
 		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
 
-		<link rel="stylesheet" href="../../css/reveal.css">
-		<link rel="stylesheet" href="../../css/theme/night.css" id="theme">
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../dist/theme/night.css" id="theme">
 	</head>
 
 	<body>
@@ -82,6 +82,14 @@
 					\]
 				</section>
 
+				<section>
+					<h3>TeX Macros</h3>
+
+					Here is a common vector space:
+					\[L^2(\R) = \set{u : \R \to \R}{\int_\R |u|^2 &lt; +\infty}\]
+					used in functional analysis.
+				</section>
+
 				<section>
 					<section>
 						<h3>The Lorenz Equations</h3>
@@ -153,32 +161,40 @@
 							\]
 						</div>
 					</section>
+
+					<section>
+						<h3>TeX Macros</h3>
+
+						Here is a common vector space:
+						\[L^2(\R) = \set{u : \R \to \R}{\int_\R |u|^2 &lt; +\infty}\]
+						used in functional analysis.
+					</section>
 				</section>
 
 			</div>
 
 		</div>
 
-		<script src="../../lib/js/head.min.js"></script>
-		<script src="../../js/reveal.js"></script>
-
+		<script src="../dist/reveal.js"></script>
+		<script src="../plugin/math/math.js"></script>
 		<script>
-
 			Reveal.initialize({
 				history: true,
 				transition: 'linear',
 
 				math: {
-					// mathjax: 'http://cdn.mathjax.org/mathjax/latest/MathJax.js',
-					config: 'TeX-AMS_HTML-full'
+					// mathjax: 'https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js',
+					config: 'TeX-AMS_HTML-full',
+					TeX: {
+						Macros: {
+							R: '\\mathbb{R}',
+							set: [ '\\left\\{#1 \\; ; \\; #2\\right\\}', 2 ]
+						}
+					}
 				},
 
-				dependencies: [
-					{ src: '../../lib/js/classList.js' },
-					{ src: '../../plugin/math/math.js', async: true }
-				]
+				plugins: [ RevealMath ]
 			});
-
 		</script>
 
 	</body>

examples/media.html

@@ -0,0 +1,75 @@
+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - Video, Audio and Iframes</title>
+
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../dist/theme/white.css" id="theme">
+	</head>
+
+	<body>
+
+		<div class="reveal">
+
+			<div class="slides">
+
+				<section>
+					<h2>Examples of embedded Video, Audio and Iframes</h2>
+				</section>
+
+				<section>
+					<h2>Iframe</h2>
+					<iframe data-autoplay width="700" height="540" src="https://slides.com/news/auto-animate/embed" frameborder="0"></iframe>
+				</section>
+
+				<section data-background-iframe="https://www.youtube.com/embed/h1_nyI3z8gI" data-background-interactive>
+					<h2 style="color: #fff;">Iframe Background</h2>
+				</section>
+
+				<section>
+					<h2>Video</h2>
+					<video src="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4" data-autoplay></video>
+				</section>
+
+				<section data-background-video="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4">
+					<h2>Background Video</h2>
+				</section>
+
+				<section>
+					<h2>Auto-playing audio</h2>
+					<audio src="assets/beeping.wav" data-autoplay></audio>
+				</section>
+
+				<section>
+					<h2>Audio inside slide fragments</h2>
+					<div class="fragment">
+						Beep 1
+						<audio src="assets/beeping.wav" data-autoplay></audio>
+					</div>
+					<div class="fragment">
+						Beep 2
+						<audio src="assets/beeping.wav" data-autoplay></audio>
+					</div>
+				</section>
+
+				<section>
+					<h2>Audio with controls</h2>
+					<audio src="assets/beeping.wav" controls></audio>
+				</section>
+
+			</div>
+
+		</div>
+
+		<script src="../dist/reveal.js"></script>
+		<script>
+			Reveal.initialize({hash: true});
+		</script>
+
+	</body>
+</html>

examples/multiple-presentations.html

@@ -0,0 +1,102 @@
+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - Multiple Presentations</title>
+
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../dist/theme/white.css" id="theme">
+		<link rel="stylesheet" href="../plugin/highlight/monokai.css">
+	</head>
+
+	<body style="background: #ddd;">
+
+		<div style="display: flex; flex-direction: row;">
+			<div class="reveal deck1" style="width: 100%; height: 50vh; margin: 10px;">
+				<div class="slides">
+					<section>Deck 1, Slide 1</section>
+					<section>Deck 1, Slide 2</section>
+					<section>
+						<pre data-id="code-animation"><code class="hljs" data-trim data-line-numbers>
+							import React, { useState } from 'react';
+							function Example() {
+							  const [count, setCount] = useState(0);
+							}
+						</code></pre>
+					</section>
+				</div>
+			</div>
+
+			<div class="reveal deck2" style="width: 100%; height: 50vh; margin: 10px;">
+				<div class="slides">
+					<section>Deck 2, Slide 1</section>
+					<section>Deck 2, Slide 2</section>
+					<section data-markdown>
+						<script type="text/template">
+							## Markdown plugin
+
+							- 1
+							- 2
+							- 3
+						</script>
+					</section>
+					<section>
+						<h3>The Lorenz Equations</h3>
+
+						\[\begin{aligned}
+						\dot{x} &amp; = \sigma(y-x) \\
+						\dot{y} &amp; = \rho x - y - xz \\
+						\dot{z} &amp; = -\beta z + xy
+						\end{aligned} \]
+					</section>
+				</div>
+			</div>
+		</div>
+
+		<style>
+			.reveal {
+				border: 4px solid #ccc;
+			}
+			.reveal.focused {
+				border-color: #94b5ff;
+			}
+		</style>
+
+		<script src="../dist/reveal.js"></script>
+		<script src="../plugin/highlight/highlight.js"></script>
+		<script src="../plugin/markdown/markdown.js"></script>
+		<script src="../plugin/math/math.js"></script>
+		<script>
+
+			let deck1 = new Reveal( document.querySelector( '.deck1' ), {
+				embedded: true,
+				progress: false,
+				keyboardCondition: 'focused',
+				plugins: [ RevealHighlight ]
+			} );
+			deck1.on( 'slidechanged', () => {
+				console.log( 'Deck 1 slide changed' );
+			} );
+			deck1.initialize();
+
+			let deck2 = new Reveal( document.querySelector( '.deck2' ), {
+				embedded: true,
+				progress: false,
+				keyboardCondition: 'focused',
+				plugins: [ RevealMarkdown, RevealMath ]
+			} );
+			deck2.initialize().then( () => {
+				deck2.slide(1);
+			} );
+			deck2.on( 'slidechanged', () => {
+				console.log( 'Deck 2 slide changed' );
+			} );
+
+		</script>
+
+	</body>
+</html>

examples/transitions.html

@@ -6,8 +6,8 @@
 
 		<title>reveal.js - Slide Transitions</title>
 
-		<link rel="stylesheet" href="../../css/reveal.css">
-		<link rel="stylesheet" href="../../css/theme/white.css" id="theme">
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../dist/theme/white.css" id="theme">
 		<style type="text/css" media="screen">
 			.slides section.has-dark-background,
 			.slides section.has-dark-background h3 {
@@ -81,11 +81,8 @@
 
 		</div>
 
-		<script src="../../lib/js/head.min.js"></script>
-		<script src="../../js/reveal.js"></script>
-
+		<script src="../dist/reveal.js"></script>
 		<script>
-
 			Reveal.initialize({
 				center: true,
 				history: true,
@@ -94,7 +91,6 @@
 				// transitionSpeed: 'slow',
 				// backgroundTransition: 'slide'
 			});
-
 		</script>
 
 	</body>

gulpfile.js

@@ -0,0 +1,291 @@
+const pkg = require('./package.json')
+const path = require('path')
+const glob = require('glob')
+const yargs = require('yargs')
+const colors = require('colors')
+const qunit = require('node-qunit-puppeteer')
+
+const {rollup} = require('rollup')
+const {terser} = require('rollup-plugin-terser')
+const babel = require('@rollup/plugin-babel').default
+const commonjs = require('@rollup/plugin-commonjs')
+const resolve = require('@rollup/plugin-node-resolve').default
+
+const gulp = require('gulp')
+const tap = require('gulp-tap')
+const zip = require('gulp-zip')
+const sass = require('gulp-sass')
+const header = require('gulp-header')
+const eslint = require('gulp-eslint')
+const minify = require('gulp-clean-css')
+const connect = require('gulp-connect')
+const autoprefixer = require('gulp-autoprefixer')
+
+const root = yargs.argv.root || '.'
+const port = yargs.argv.port || 8000
+
+const banner = `/*!
+* reveal.js ${pkg.version}
+* ${pkg.homepage}
+* MIT licensed
+*
+* Copyright (C) 2020 Hakim El Hattab, https://hakim.se
+*/\n`
+
+// Prevents warnings from opening too many test pages
+process.setMaxListeners(20);
+
+const babelConfig = {
+    babelHelpers: 'bundled',
+    ignore: ['node_modules'],
+    compact: false,
+    extensions: ['.js', '.html'],
+    plugins: [
+        'transform-html-import-to-string'
+    ],
+    presets: [[
+        '@babel/preset-env',
+        {
+            corejs: 3,
+            useBuiltIns: 'usage',
+            modules: false
+        }
+    ]]
+};
+
+// Our ES module bundle only targets newer browsers with
+// module support. Browsers are targeted explicitly instead
+// of using the "esmodule: true" target since that leads to
+// polyfilling older browsers and a larger bundle.
+const babelConfigESM = JSON.parse( JSON.stringify( babelConfig ) );
+babelConfigESM.presets[0][1].targets = { browsers: [
+    'last 2 Chrome versions', 'not Chrome < 60',
+    'last 2 Safari versions', 'not Safari < 10.1',
+    'last 2 iOS versions', 'not iOS < 10.3',
+    'last 2 Firefox versions', 'not Firefox < 60',
+    'last 2 Edge versions', 'not Edge < 16',
+] };
+
+let cache = {};
+
+// Creates a bundle with broad browser support, exposed
+// as UMD
+gulp.task('js-es5', () => {
+    return rollup({
+        cache: cache.umd,
+        input: 'js/index.js',
+        plugins: [
+            resolve(),
+            commonjs(),
+            babel( babelConfig ),
+            terser()
+        ]
+    }).then( bundle => {
+        cache.umd = bundle.cache;
+        return bundle.write({
+            name: 'Reveal',
+            file: './dist/reveal.js',
+            format: 'umd',
+            banner: banner,
+            sourcemap: true
+        });
+    });
+})
+
+// Creates an ES module bundle
+gulp.task('js-es6', () => {
+    return rollup({
+        cache: cache.esm,
+        input: 'js/index.js',
+        plugins: [
+            resolve(),
+            commonjs(),
+            babel( babelConfigESM ),
+            terser()
+        ]
+    }).then( bundle => {
+        cache.esm = bundle.cache;
+        return bundle.write({
+            file: './dist/reveal.esm.js',
+            format: 'es',
+            banner: banner,
+            sourcemap: true
+        });
+    });
+})
+gulp.task('js', gulp.parallel('js-es5', 'js-es6'));
+
+// Creates a UMD and ES module bundle for each of our
+// built-in plugins
+gulp.task('plugins', () => {
+    return Promise.all([
+        { name: 'RevealHighlight', input: './plugin/highlight/plugin.js', output: './plugin/highlight/highlight' },
+        { name: 'RevealMarkdown', input: './plugin/markdown/plugin.js', output: './plugin/markdown/markdown' },
+        { name: 'RevealSearch', input: './plugin/search/plugin.js', output: './plugin/search/search' },
+        { name: 'RevealNotes', input: './plugin/notes/plugin.js', output: './plugin/notes/notes' },
+        { name: 'RevealZoom', input: './plugin/zoom/plugin.js', output: './plugin/zoom/zoom' },
+        { name: 'RevealMath', input: './plugin/math/plugin.js', output: './plugin/math/math' },
+    ].map( plugin => {
+        return rollup({
+                cache: cache[plugin.input],
+                input: plugin.input,
+                plugins: [
+                    resolve(),
+                    commonjs(),
+                    babel({
+                        ...babelConfig,
+                        ignore: [/node_modules\/(?!(highlight\.js|marked)\/).*/],
+                    }),
+                    terser()
+                ]
+            }).then( bundle => {
+                cache[plugin.input] = bundle.cache;
+                bundle.write({
+                    file: plugin.output + '.esm.js',
+                    name: plugin.name,
+                    format: 'es'
+                })
+
+                bundle.write({
+                    file: plugin.output + '.js',
+                    name: plugin.name,
+                    format: 'umd'
+                })
+            });
+    } ));
+})
+
+gulp.task('css-themes', () => gulp.src(['./css/theme/source/*.{sass,scss}'])
+        .pipe(sass())
+        .pipe(gulp.dest('./dist/theme')))
+
+gulp.task('css-core', () => gulp.src(['css/reveal.scss'])
+    .pipe(sass())
+    .pipe(autoprefixer())
+    .pipe(minify({compatibility: 'ie9'}))
+    .pipe(header(banner))
+    .pipe(gulp.dest('./dist')))
+
+gulp.task('css', gulp.parallel('css-themes', 'css-core'))
+
+gulp.task('qunit', () => {
+
+    let serverConfig = {
+        root,
+        port: 8009,
+        host: '0.0.0.0',
+        name: 'test-server'
+    }
+
+    let server = connect.server( serverConfig )
+
+    let testFiles = glob.sync('test/*.html' )
+
+    let totalTests = 0;
+    let failingTests = 0;
+
+    let tests = Promise.all( testFiles.map( filename => {
+        return new Promise( ( resolve, reject ) => {
+            qunit.runQunitPuppeteer({
+                targetUrl: `http://${serverConfig.host}:${serverConfig.port}/${filename}`,
+                timeout: 20000,
+                redirectConsole: false,
+                puppeteerArgs: ['--allow-file-access-from-files']
+            })
+                .then(result => {
+                    if( result.stats.failed > 0 ) {
+                        console.log(`${'!'} ${filename} [${result.stats.passed}/${result.stats.total}] in ${result.stats.runtime}ms`.red);
+                        // qunit.printResultSummary(result, console);
+                        qunit.printFailedTests(result, console);
+                    }
+                    else {
+                        console.log(`${'✔'} ${filename} [${result.stats.passed}/${result.stats.total}] in ${result.stats.runtime}ms`.green);
+                    }
+
+                    totalTests += result.stats.total;
+                    failingTests += result.stats.failed;
+
+                    resolve();
+                })
+                .catch(error => {
+                    console.error(error);
+                    reject();
+                });
+        } )
+    } ) );
+
+    return new Promise( ( resolve, reject ) => {
+
+        tests.then( () => {
+                if( failingTests > 0 ) {
+                    reject( new Error(`${failingTests}/${totalTests} tests failed`.red) );
+                }
+                else {
+                    console.log(`${'✔'} Passed ${totalTests} tests`.green.bold);
+                    resolve();
+                }
+            } )
+            .catch( () => {
+                reject();
+            } )
+            .finally( () => {
+                server.close();
+            } );
+
+    } );
+} )
+
+gulp.task('eslint', () => gulp.src(['./js/**', 'gulpfile.js'])
+        .pipe(eslint())
+        .pipe(eslint.format()))
+
+gulp.task('test', gulp.series( 'eslint', 'qunit' ))
+
+gulp.task('default', gulp.series(gulp.parallel('js', 'css', 'plugins'), 'test'))
+
+gulp.task('build', gulp.parallel('js', 'css', 'plugins'))
+
+gulp.task('package', gulp.series('default', () =>
+
+    gulp.src([
+        './index.html',
+        './dist/**',
+        './lib/**',
+        './images/**',
+        './plugin/**',
+        './**.md'
+    ]).pipe(zip('reveal-js-presentation.zip')).pipe(gulp.dest('./'))
+
+))
+
+gulp.task('reload', () => gulp.src(['*.html', '*.md'])
+    .pipe(connect.reload()));
+
+gulp.task('serve', () => {
+
+    connect.server({
+        root: root,
+        port: port,
+        host: '0.0.0.0',
+        livereload: true
+    })
+
+    gulp.watch(['*.html', '*.md'], gulp.series('reload'))
+
+    gulp.watch(['js/**'], gulp.series('js', 'reload', 'test'))
+
+    gulp.watch(['plugin/**/plugin.js'], gulp.series('plugins', 'reload'))
+
+    gulp.watch([
+        'css/theme/source/*.{sass,scss}',
+        'css/theme/template/*.{sass,scss}',
+    ], gulp.series('css-themes', 'reload'))
+
+    gulp.watch([
+        'css/*.scss',
+        'css/print/*.{sass,scss,css}'
+    ], gulp.series('css-core', 'reload'))
+
+    gulp.watch(['test/*.html'], gulp.series('test'))
+
+})

index.html

@@ -6,20 +6,12 @@
 
 		<title>reveal.js</title>
 
-		<link rel="stylesheet" href="css/reveal.css">
-		<link rel="stylesheet" href="css/theme/black.css">
+		<link rel="stylesheet" href="dist/reset.css">
+		<link rel="stylesheet" href="dist/reveal.css">
+		<link rel="stylesheet" href="dist/theme/black.css" id="theme">
 
-		<!-- Theme used for syntax highlighting of code -->
-		<link rel="stylesheet" href="lib/css/zenburn.css">
-
-		<!-- Printing and PDF exports -->
-		<script>
-			var link = document.createElement( 'link' );
-			link.rel = 'stylesheet';
-			link.type = 'text/css';
-			link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
-			document.getElementsByTagName( 'head' )[0].appendChild( link );
-		</script>
+		<!-- Theme used for syntax highlighted code -->
+		<link rel="stylesheet" href="plugin/highlight/monokai.css" id="highlight-theme">
 	</head>
 	<body>
 		<div class="reveal">
@@ -29,21 +21,19 @@
 			</div>
 		</div>
 
-		<script src="lib/js/head.min.js"></script>
-		<script src="js/reveal.js"></script>
-
+		<script src="dist/reveal.js"></script>
+		<script src="plugin/notes/notes.js"></script>
+		<script src="plugin/markdown/markdown.js"></script>
+		<script src="plugin/highlight/highlight.js"></script>
 		<script>
-			// More info https://github.com/hakimel/reveal.js#configuration
+			// More info about initialization & config:
+			// - https://revealjs.com/initialization/
+			// - https://revealjs.com/config/
 			Reveal.initialize({
-				history: true,
+				hash: true,
 
-				// More info https://github.com/hakimel/reveal.js#dependencies
-				dependencies: [
-					{ src: 'plugin/markdown/marked.js' },
-					{ src: 'plugin/markdown/markdown.js' },
-					{ src: 'plugin/notes/notes.js', async: true },
-					{ src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } }
-				]
+				// Learn about plugins: https://revealjs.com/plugins/
+				plugins: [ RevealMarkdown, RevealHighlight, RevealNotes ]
 			});
 		</script>
 	</body>

js/components/playback.js

@@ -0,0 +1,165 @@
+/**
+ * UI component that lets the use control auto-slide
+ * playback via play/pause.
+ */
+export default class Playback {
+
+	/**
+	 * @param {HTMLElement} container The component will append
+	 * itself to this
+	 * @param {function} progressCheck A method which will be
+	 * called frequently to get the current playback progress on
+	 * a range of 0-1
+	 */
+	constructor( container, progressCheck ) {
+
+		// Cosmetics
+		this.diameter = 100;
+		this.diameter2 = this.diameter/2;
+		this.thickness = 6;
+
+		// Flags if we are currently playing
+		this.playing = false;
+
+		// Current progress on a 0-1 range
+		this.progress = 0;
+
+		// Used to loop the animation smoothly
+		this.progressOffset = 1;
+
+		this.container = container;
+		this.progressCheck = progressCheck;
+
+		this.canvas = document.createElement( 'canvas' );
+		this.canvas.className = 'playback';
+		this.canvas.width = this.diameter;
+		this.canvas.height = this.diameter;
+		this.canvas.style.width = this.diameter2 + 'px';
+		this.canvas.style.height = this.diameter2 + 'px';
+		this.context = this.canvas.getContext( '2d' );
+
+		this.container.appendChild( this.canvas );
+
+		this.render();
+
+	}
+
+	setPlaying( value ) {
+
+		const wasPlaying = this.playing;
+
+		this.playing = value;
+
+		// Start repainting if we weren't already
+		if( !wasPlaying && this.playing ) {
+			this.animate();
+		}
+		else {
+			this.render();
+		}
+
+	}
+
+	animate() {
+
+		const progressBefore = this.progress;
+
+		this.progress = this.progressCheck();
+
+		// When we loop, offset the progress so that it eases
+		// smoothly rather than immediately resetting
+		if( progressBefore > 0.8 && this.progress < 0.2 ) {
+			this.progressOffset = this.progress;
+		}
+
+		this.render();
+
+		if( this.playing ) {
+			requestAnimationFrame( this.animate.bind( this ) );
+		}
+
+	}
+
+	/**
+	 * Renders the current progress and playback state.
+	 */
+	render() {
+
+		let progress = this.playing ? this.progress : 0,
+			radius = ( this.diameter2 ) - this.thickness,
+			x = this.diameter2,
+			y = this.diameter2,
+			iconSize = 28;
+
+		// Ease towards 1
+		this.progressOffset += ( 1 - this.progressOffset ) * 0.1;
+
+		const endAngle = ( - Math.PI / 2 ) + ( progress * ( Math.PI * 2 ) );
+		const startAngle = ( - Math.PI / 2 ) + ( this.progressOffset * ( Math.PI * 2 ) );
+
+		this.context.save();
+		this.context.clearRect( 0, 0, this.diameter, this.diameter );
+
+		// Solid background color
+		this.context.beginPath();
+		this.context.arc( x, y, radius + 4, 0, Math.PI * 2, false );
+		this.context.fillStyle = 'rgba( 0, 0, 0, 0.4 )';
+		this.context.fill();
+
+		// Draw progress track
+		this.context.beginPath();
+		this.context.arc( x, y, radius, 0, Math.PI * 2, false );
+		this.context.lineWidth = this.thickness;
+		this.context.strokeStyle = 'rgba( 255, 255, 255, 0.2 )';
+		this.context.stroke();
+
+		if( this.playing ) {
+			// Draw progress on top of track
+			this.context.beginPath();
+			this.context.arc( x, y, radius, startAngle, endAngle, false );
+			this.context.lineWidth = this.thickness;
+			this.context.strokeStyle = '#fff';
+			this.context.stroke();
+		}
+
+		this.context.translate( x - ( iconSize / 2 ), y - ( iconSize / 2 ) );
+
+		// Draw play/pause icons
+		if( this.playing ) {
+			this.context.fillStyle = '#fff';
+			this.context.fillRect( 0, 0, iconSize / 2 - 4, iconSize );
+			this.context.fillRect( iconSize / 2 + 4, 0, iconSize / 2 - 4, iconSize );
+		}
+		else {
+			this.context.beginPath();
+			this.context.translate( 4, 0 );
+			this.context.moveTo( 0, 0 );
+			this.context.lineTo( iconSize - 4, iconSize / 2 );
+			this.context.lineTo( 0, iconSize );
+			this.context.fillStyle = '#fff';
+			this.context.fill();
+		}
+
+		this.context.restore();
+
+	}
+
+	on( type, listener ) {
+		this.canvas.addEventListener( type, listener, false );
+	}
+
+	off( type, listener ) {
+		this.canvas.removeEventListener( type, listener, false );
+	}
+
+	destroy() {
+
+		this.playing = false;
+
+		if( this.canvas.parentNode ) {
+			this.container.removeChild( this.canvas );
+		}
+
+	}
+
+}

js/config.js

@@ -0,0 +1,293 @@
+/**
+ * The default reveal.js config object.
+ */
+export default {
+
+	// The "normal" size of the presentation, aspect ratio will be preserved
+	// when the presentation is scaled to fit different resolutions
+	width: 960,
+	height: 700,
+
+	// Factor of the display size that should remain empty around the content
+	margin: 0.04,
+
+	// Bounds for smallest/largest possible scale to apply to content
+	minScale: 0.2,
+	maxScale: 2.0,
+
+	// Display presentation control arrows
+	controls: true,
+
+	// Help the user learn the controls by providing hints, for example by
+	// bouncing the down arrow when they first encounter a vertical slide
+	controlsTutorial: true,
+
+	// Determines where controls appear, "edges" or "bottom-right"
+	controlsLayout: 'bottom-right',
+
+	// Visibility rule for backwards navigation arrows; "faded", "hidden"
+	// or "visible"
+	controlsBackArrows: 'faded',
+
+	// Display a presentation progress bar
+	progress: true,
+
+	// Display the page number of the current slide
+	// - true:    Show slide number
+	// - false:   Hide slide number
+	//
+	// Can optionally be set as a string that specifies the number formatting:
+	// - "h.v":	  Horizontal . vertical slide number (default)
+	// - "h/v":	  Horizontal / vertical slide number
+	// - "c":	  Flattened slide number
+	// - "c/t":	  Flattened slide number / total slides
+	//
+	// Alternatively, you can provide a function that returns the slide
+	// number for the current slide. The function should take in a slide
+	// object and return an array with one string [slideNumber] or
+	// three strings [n1,delimiter,n2]. See #formatSlideNumber().
+	slideNumber: false,
+
+	// Can be used to limit the contexts in which the slide number appears
+	// - "all":      Always show the slide number
+	// - "print":    Only when printing to PDF
+	// - "speaker":  Only in the speaker view
+	showSlideNumber: 'all',
+
+	// Use 1 based indexing for # links to match slide number (default is zero
+	// based)
+	hashOneBasedIndex: false,
+
+	// Add the current slide number to the URL hash so that reloading the
+	// page/copying the URL will return you to the same slide
+	hash: false,
+
+	// Flags if we should monitor the hash and change slides accordingly
+	respondToHashChanges: true,
+
+	// Push each slide change to the browser history.  Implies `hash: true`
+	history: false,
+
+	// Enable keyboard shortcuts for navigation
+	keyboard: true,
+
+	// Optional function that blocks keyboard events when retuning false
+	//
+	// If you set this to 'foucsed', we will only capture keyboard events
+	// for embdedded decks when they are in focus
+	keyboardCondition: null,
+
+	// Disables the default reveal.js slide layout (scaling and centering)
+	// so that you can use custom CSS layout
+	disableLayout: false,
+
+	// Enable the slide overview mode
+	overview: true,
+
+	// Vertical centering of slides
+	center: true,
+
+	// Enables touch navigation on devices with touch input
+	touch: true,
+
+	// Loop the presentation
+	loop: false,
+
+	// Change the presentation direction to be RTL
+	rtl: false,
+
+	// Changes the behavior of our navigation directions.
+	//
+	// "default"
+	// Left/right arrow keys step between horizontal slides, up/down
+	// arrow keys step between vertical slides. Space key steps through
+	// all slides (both horizontal and vertical).
+	//
+	// "linear"
+	// Removes the up/down arrows. Left/right arrows step through all
+	// slides (both horizontal and vertical).
+	//
+	// "grid"
+	// When this is enabled, stepping left/right from a vertical stack
+	// to an adjacent vertical stack will land you at the same vertical
+	// index.
+	//
+	// Consider a deck with six slides ordered in two vertical stacks:
+	// 1.1    2.1
+	// 1.2    2.2
+	// 1.3    2.3
+	//
+	// If you're on slide 1.3 and navigate right, you will normally move
+	// from 1.3 -> 2.1. If "grid" is used, the same navigation takes you
+	// from 1.3 -> 2.3.
+	navigationMode: 'default',
+
+	// Randomizes the order of slides each time the presentation loads
+	shuffle: false,
+
+	// Turns fragments on and off globally
+	fragments: true,
+
+	// Flags whether to include the current fragment in the URL,
+	// so that reloading brings you to the same fragment position
+	fragmentInURL: true,
+
+	// Flags if the presentation is running in an embedded mode,
+	// i.e. contained within a limited portion of the screen
+	embedded: false,
+
+	// Flags if we should show a help overlay when the question-mark
+	// key is pressed
+	help: true,
+
+	// Flags if it should be possible to pause the presentation (blackout)
+	pause: true,
+
+	// Flags if speaker notes should be visible to all viewers
+	showNotes: false,
+
+	// Flags if slides with data-visibility="hidden" should be kep visible
+	showHiddenSlides: false,
+
+	// Global override for autolaying embedded media (video/audio/iframe)
+	// - null:   Media will only autoplay if data-autoplay is present
+	// - true:   All media will autoplay, regardless of individual setting
+	// - false:  No media will autoplay, regardless of individual setting
+	autoPlayMedia: null,
+
+	// Global override for preloading lazy-loaded iframes
+	// - null:   Iframes with data-src AND data-preload will be loaded when within
+	//           the viewDistance, iframes with only data-src will be loaded when visible
+	// - true:   All iframes with data-src will be loaded when within the viewDistance
+	// - false:  All iframes with data-src will be loaded only when visible
+	preloadIframes: null,
+
+	// Can be used to globally disable auto-animation
+	autoAnimate: true,
+
+	// Optionally provide a custom element matcher that will be
+	// used to dictate which elements we can animate between.
+	autoAnimateMatcher: null,
+
+	// Default settings for our auto-animate transitions, can be
+	// overridden per-slide or per-element via data arguments
+	autoAnimateEasing: 'ease',
+	autoAnimateDuration: 1.0,
+	autoAnimateUnmatched: true,
+
+	// CSS properties that can be auto-animated. Position & scale
+	// is matched separately so there's no need to include styles
+	// like top/right/bottom/left, width/height or margin.
+	autoAnimateStyles: [
+		'opacity',
+		'color',
+		'background-color',
+		'padding',
+		'font-size',
+		'line-height',
+		'letter-spacing',
+		'border-width',
+		'border-color',
+		'border-radius',
+		'outline',
+		'outline-offset'
+	],
+
+	// Controls automatic progression to the next slide
+	// - 0:      Auto-sliding only happens if the data-autoslide HTML attribute
+	//           is present on the current slide or fragment
+	// - 1+:     All slides will progress automatically at the given interval
+	// - false:  No auto-sliding, even if data-autoslide is present
+	autoSlide: 0,
+
+	// Stop auto-sliding after user input
+	autoSlideStoppable: true,
+
+	// Use this method for navigation when auto-sliding (defaults to navigateNext)
+	autoSlideMethod: null,
+
+	// Specify the average time in seconds that you think you will spend
+	// presenting each slide. This is used to show a pacing timer in the
+	// speaker view
+	defaultTiming: null,
+
+	// Enable slide navigation via mouse wheel
+	mouseWheel: false,
+
+	// Opens links in an iframe preview overlay
+	// Add `data-preview-link` and `data-preview-link="false"` to customise each link
+	// individually
+	previewLinks: false,
+
+	// Exposes the reveal.js API through window.postMessage
+	postMessage: true,
+
+	// Dispatches all reveal.js events to the parent window through postMessage
+	postMessageEvents: false,
+
+	// Focuses body when page changes visibility to ensure keyboard shortcuts work
+	focusBodyOnPageVisibilityChange: true,
+
+	// Transition style
+	transition: 'slide', // none/fade/slide/convex/concave/zoom
+
+	// Transition speed
+	transitionSpeed: 'default', // default/fast/slow
+
+	// Transition style for full page slide backgrounds
+	backgroundTransition: 'fade', // none/fade/slide/convex/concave/zoom
+
+	// Parallax background image
+	parallaxBackgroundImage: '', // CSS syntax, e.g. "a.jpg"
+
+	// Parallax background size
+	parallaxBackgroundSize: '', // CSS syntax, e.g. "3000px 2000px"
+
+	// Parallax background repeat
+	parallaxBackgroundRepeat: '', // repeat/repeat-x/repeat-y/no-repeat/initial/inherit
+
+	// Parallax background position
+	parallaxBackgroundPosition: '', // CSS syntax, e.g. "top left"
+
+	// Amount of pixels to move the parallax background per slide step
+	parallaxBackgroundHorizontal: null,
+	parallaxBackgroundVertical: null,
+
+	// The maximum number of pages a single slide can expand onto when printing
+	// to PDF, unlimited by default
+	pdfMaxPagesPerSlide: Number.POSITIVE_INFINITY,
+
+	// Prints each fragment on a separate slide
+	pdfSeparateFragments: true,
+
+	// Offset used to reduce the height of content within exported PDF pages.
+	// This exists to account for environment differences based on how you
+	// print to PDF. CLI printing options, like phantomjs and wkpdf, can end
+	// on precisely the total height of the document whereas in-browser
+	// printing has to end one pixel before.
+	pdfPageHeightOffset: -1,
+
+	// Number of slides away from the current that are visible
+	viewDistance: 3,
+
+	// Number of slides away from the current that are visible on mobile
+	// devices. It is advisable to set this to a lower number than
+	// viewDistance in order to save resources.
+	mobileViewDistance: 2,
+
+	// The display mode that will be used to show slides
+	display: 'block',
+
+	// Hide cursor if inactive
+	hideInactiveCursor: true,
+
+	// Time before the cursor is hidden (in ms)
+	hideCursorTime: 5000,
+
+	// Script dependencies to load
+	dependencies: [],
+
+	// Plugin objects to register and use for this presentation
+	plugins: []
+
+}

js/controllers/autoanimate.js

@@ -0,0 +1,619 @@
+import { queryAll, extend, createStyleSheet, matches, closest } from '../utils/util.js'
+import { FRAGMENT_STYLE_REGEX } from '../utils/constants.js'
+
+// Counter used to generate unique IDs for auto-animated elements
+let autoAnimateCounter = 0;
+
+/**
+ * Automatically animates matching elements across
+ * slides with the [data-auto-animate] attribute.
+ */
+export default class AutoAnimate {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+	}
+
+	/**
+	 * Runs an auto-animation between the given slides.
+	 *
+	 * @param  {HTMLElement} fromSlide
+	 * @param  {HTMLElement} toSlide
+	 */
+	run( fromSlide, toSlide ) {
+
+		// Clean up after prior animations
+		this.reset();
+
+		// Ensure that both slides are auto-animate targets
+		if( fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' ) ) {
+
+			// Create a new auto-animate sheet
+			this.autoAnimateStyleSheet = this.autoAnimateStyleSheet || createStyleSheet();
+
+			let animationOptions = this.getAutoAnimateOptions( toSlide );
+
+			// Set our starting state
+			fromSlide.dataset.autoAnimate = 'pending';
+			toSlide.dataset.autoAnimate = 'pending';
+
+			// Flag the navigation direction, needed for fragment buildup
+			let allSlides = this.Reveal.getSlides();
+			animationOptions.slideDirection = allSlides.indexOf( toSlide ) > allSlides.indexOf( fromSlide ) ? 'forward' : 'backward';
+
+			// Inject our auto-animate styles for this transition
+			let css = this.getAutoAnimatableElements( fromSlide, toSlide ).map( elements => {
+				return this.autoAnimateElements( elements.from, elements.to, elements.options || {}, animationOptions, autoAnimateCounter++ );
+			} );
+
+			// Animate unmatched elements, if enabled
+			if( toSlide.dataset.autoAnimateUnmatched !== 'false' && this.Reveal.getConfig().autoAnimateUnmatched === true ) {
+
+				// Our default timings for unmatched elements
+				let defaultUnmatchedDuration = animationOptions.duration * 0.8,
+					defaultUnmatchedDelay = animationOptions.duration * 0.2;
+
+				this.getUnmatchedAutoAnimateElements( toSlide ).forEach( unmatchedElement => {
+
+					let unmatchedOptions = this.getAutoAnimateOptions( unmatchedElement, animationOptions );
+					let id = 'unmatched';
+
+					// If there is a duration or delay set specifically for this
+					// element our unmatched elements should adhere to those
+					if( unmatchedOptions.duration !== animationOptions.duration || unmatchedOptions.delay !== animationOptions.delay ) {
+						id = 'unmatched-' + autoAnimateCounter++;
+						css.push( `[data-auto-animate="running"] [data-auto-animate-target="${id}"] { transition: opacity ${unmatchedOptions.duration}s ease ${unmatchedOptions.delay}s; }` );
+					}
+
+					unmatchedElement.dataset.autoAnimateTarget = id;
+
+				}, this );
+
+				// Our default transition for unmatched elements
+				css.push( `[data-auto-animate="running"] [data-auto-animate-target="unmatched"] { transition: opacity ${defaultUnmatchedDuration}s ease ${defaultUnmatchedDelay}s; }` );
+
+			}
+
+			// Setting the whole chunk of CSS at once is the most
+			// efficient way to do this. Using sheet.insertRule
+			// is multiple factors slower.
+			this.autoAnimateStyleSheet.innerHTML = css.join( '' );
+
+			// Start the animation next cycle
+			requestAnimationFrame( () => {
+				if( this.autoAnimateStyleSheet ) {
+					// This forces our newly injected styles to be applied in Firefox
+					getComputedStyle( this.autoAnimateStyleSheet ).fontWeight;
+
+					toSlide.dataset.autoAnimate = 'running';
+				}
+			} );
+
+			this.Reveal.dispatchEvent({
+				type: 'autoanimate',
+				data: {
+					fromSlide,
+					toSlide,
+					sheet: this.autoAnimateStyleSheet
+				}
+			});
+
+		}
+
+	}
+
+	/**
+	 * Rolls back all changes that we've made to the DOM so
+	 * that as part of animating.
+	 */
+	reset() {
+
+		// Reset slides
+		queryAll( this.Reveal.getRevealElement(), '[data-auto-animate]:not([data-auto-animate=""])' ).forEach( element => {
+			element.dataset.autoAnimate = '';
+		} );
+
+		// Reset elements
+		queryAll( this.Reveal.getRevealElement(), '[data-auto-animate-target]' ).forEach( element => {
+			delete element.dataset.autoAnimateTarget;
+		} );
+
+		// Remove the animation sheet
+		if( this.autoAnimateStyleSheet && this.autoAnimateStyleSheet.parentNode ) {
+			this.autoAnimateStyleSheet.parentNode.removeChild( this.autoAnimateStyleSheet );
+			this.autoAnimateStyleSheet = null;
+		}
+
+	}
+
+	/**
+	 * Creates a FLIP animation where the `to` element starts out
+	 * in the `from` element position and animates to its original
+	 * state.
+	 *
+	 * @param {HTMLElement} from
+	 * @param {HTMLElement} to
+	 * @param {Object} elementOptions Options for this element pair
+	 * @param {Object} animationOptions Options set at the slide level
+	 * @param {String} id Unique ID that we can use to identify this
+	 * auto-animate element in the DOM
+	 */
+	autoAnimateElements( from, to, elementOptions, animationOptions, id ) {
+
+		// 'from' elements are given a data-auto-animate-target with no value,
+		// 'to' elements are are given a data-auto-animate-target with an ID
+		from.dataset.autoAnimateTarget = '';
+		to.dataset.autoAnimateTarget = id;
+
+		// Each element may override any of the auto-animate options
+		// like transition easing, duration and delay via data-attributes
+		let options = this.getAutoAnimateOptions( to, animationOptions );
+
+		// If we're using a custom element matcher the element options
+		// may contain additional transition overrides
+		if( typeof elementOptions.delay !== 'undefined' ) options.delay = elementOptions.delay;
+		if( typeof elementOptions.duration !== 'undefined' ) options.duration = elementOptions.duration;
+		if( typeof elementOptions.easing !== 'undefined' ) options.easing = elementOptions.easing;
+
+		let fromProps = this.getAutoAnimatableProperties( 'from', from, elementOptions ),
+			toProps = this.getAutoAnimatableProperties( 'to', to, elementOptions );
+
+		// Maintain fragment visibility for matching elements when
+		// we're navigating forwards, this way the viewer won't need
+		// to step through the same fragments twice
+		if( to.classList.contains( 'fragment' ) ) {
+
+			// Don't auto-animate the opacity of fragments to avoid
+			// conflicts with fragment animations
+			delete toProps.styles['opacity'];
+
+			if( from.classList.contains( 'fragment' ) ) {
+
+				let fromFragmentStyle = ( from.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];
+				let toFragmentStyle = ( to.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];
+
+				// Only skip the fragment if the fragment animation style
+				// remains unchanged
+				if( fromFragmentStyle === toFragmentStyle && animationOptions.slideDirection === 'forward' ) {
+					to.classList.add( 'visible', 'disabled' );
+				}
+
+			}
+
+		}
+
+		// If translation and/or scaling are enabled, css transform
+		// the 'to' element so that it matches the position and size
+		// of the 'from' element
+		if( elementOptions.translate !== false || elementOptions.scale !== false ) {
+
+			let presentationScale = this.Reveal.getScale();
+
+			let delta = {
+				x: ( fromProps.x - toProps.x ) / presentationScale,
+				y: ( fromProps.y - toProps.y ) / presentationScale,
+				scaleX: fromProps.width / toProps.width,
+				scaleY: fromProps.height / toProps.height
+			};
+
+			// Limit decimal points to avoid 0.0001px blur and stutter
+			delta.x = Math.round( delta.x * 1000 ) / 1000;
+			delta.y = Math.round( delta.y * 1000 ) / 1000;
+			delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;
+			delta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;
+
+			let translate = elementOptions.translate !== false && ( delta.x !== 0 || delta.y !== 0 ),
+				scale = elementOptions.scale !== false && ( delta.scaleX !== 0 || delta.scaleY !== 0 );
+
+			// No need to transform if nothing's changed
+			if( translate || scale ) {
+
+				let transform = [];
+
+				if( translate ) transform.push( `translate(${delta.x}px, ${delta.y}px)` );
+				if( scale ) transform.push( `scale(${delta.scaleX}, ${delta.scaleY})` );
+
+				fromProps.styles['transform'] = transform.join( ' ' );
+				fromProps.styles['transform-origin'] = 'top left';
+
+				toProps.styles['transform'] = 'none';
+
+			}
+
+		}
+
+		// Delete all unchanged 'to' styles
+		for( let propertyName in toProps.styles ) {
+			const toValue = toProps.styles[propertyName];
+			const fromValue = fromProps.styles[propertyName];
+
+			if( toValue === fromValue ) {
+				delete toProps.styles[propertyName];
+			}
+			else {
+				// If these property values were set via a custom matcher providing
+				// an explicit 'from' and/or 'to' value, we always inject those values.
+				if( toValue.explicitValue === true ) {
+					toProps.styles[propertyName] = toValue.value;
+				}
+
+				if( fromValue.explicitValue === true ) {
+					fromProps.styles[propertyName] = fromValue.value;
+				}
+			}
+		}
+
+		let css = '';
+
+		let toStyleProperties = Object.keys( toProps.styles );
+
+		// Only create animate this element IF at least one style
+		// property has changed
+		if( toStyleProperties.length > 0 ) {
+
+			// Instantly move to the 'from' state
+			fromProps.styles['transition'] = 'none';
+
+			// Animate towards the 'to' state
+			toProps.styles['transition'] = `all ${options.duration}s ${options.easing} ${options.delay}s`;
+			toProps.styles['transition-property'] = toStyleProperties.join( ', ' );
+			toProps.styles['will-change'] = toStyleProperties.join( ', ' );
+
+			// Build up our custom CSS. We need to override inline styles
+			// so we need to make our styles vErY IMPORTANT!1!!
+			let fromCSS = Object.keys( fromProps.styles ).map( propertyName => {
+				return propertyName + ': ' + fromProps.styles[propertyName] + ' !important;';
+			} ).join( '' );
+
+			let toCSS = Object.keys( toProps.styles ).map( propertyName => {
+				return propertyName + ': ' + toProps.styles[propertyName] + ' !important;';
+			} ).join( '' );
+
+			css = 	'[data-auto-animate-target="'+ id +'"] {'+ fromCSS +'}' +
+					'[data-auto-animate="running"] [data-auto-animate-target="'+ id +'"] {'+ toCSS +'}';
+
+		}
+
+		return css;
+
+	}
+
+	/**
+	 * Returns the auto-animate options for the given element.
+	 *
+	 * @param {HTMLElement} element Element to pick up options
+	 * from, either a slide or an animation target
+	 * @param {Object} [inheritedOptions] Optional set of existing
+	 * options
+	 */
+	getAutoAnimateOptions( element, inheritedOptions ) {
+
+		let options = {
+			easing: this.Reveal.getConfig().autoAnimateEasing,
+			duration: this.Reveal.getConfig().autoAnimateDuration,
+			delay: 0
+		};
+
+		options = extend( options, inheritedOptions );
+
+		// Inherit options from parent elements
+		if( element.parentNode ) {
+			let autoAnimatedParent = closest( element.parentNode, '[data-auto-animate-target]' );
+			if( autoAnimatedParent ) {
+				options = this.getAutoAnimateOptions( autoAnimatedParent, options );
+			}
+		}
+
+		if( element.dataset.autoAnimateEasing ) {
+			options.easing = element.dataset.autoAnimateEasing;
+		}
+
+		if( element.dataset.autoAnimateDuration ) {
+			options.duration = parseFloat( element.dataset.autoAnimateDuration );
+		}
+
+		if( element.dataset.autoAnimateDelay ) {
+			options.delay = parseFloat( element.dataset.autoAnimateDelay );
+		}
+
+		return options;
+
+	}
+
+	/**
+	 * Returns an object containing all of the properties
+	 * that can be auto-animated for the given element and
+	 * their current computed values.
+	 *
+	 * @param {String} direction 'from' or 'to'
+	 */
+	getAutoAnimatableProperties( direction, element, elementOptions ) {
+
+		let config = this.Reveal.getConfig();
+
+		let properties = { styles: [] };
+
+		// Position and size
+		if( elementOptions.translate !== false || elementOptions.scale !== false ) {
+			let bounds;
+
+			// Custom auto-animate may optionally return a custom tailored
+			// measurement function
+			if( typeof elementOptions.measure === 'function' ) {
+				bounds = elementOptions.measure( element );
+			}
+			else {
+				if( config.center ) {
+					// More precise, but breaks when used in combination
+					// with zoom for scaling the deck ¯\_(ツ)_/¯
+					bounds = element.getBoundingClientRect();
+				}
+				else {
+					let scale = this.Reveal.getScale();
+					bounds = {
+						x: element.offsetLeft * scale,
+						y: element.offsetTop * scale,
+						width: element.offsetWidth * scale,
+						height: element.offsetHeight * scale
+					};
+				}
+			}
+
+			properties.x = bounds.x;
+			properties.y = bounds.y;
+			properties.width = bounds.width;
+			properties.height = bounds.height;
+		}
+
+		const computedStyles = getComputedStyle( element );
+
+		// CSS styles
+		( elementOptions.styles || config.autoAnimateStyles ).forEach( style => {
+			let value;
+
+			// `style` is either the property name directly, or an object
+			// definition of a style property
+			if( typeof style === 'string' ) style = { property: style };
+
+			if( typeof style.from !== 'undefined' && direction === 'from' ) {
+				value = { value: style.from, explicitValue: true };
+			}
+			else if( typeof style.to !== 'undefined' && direction === 'to' ) {
+				value = { value: style.to, explicitValue: true };
+			}
+			else {
+				value = computedStyles[style.property];
+			}
+
+			if( value !== '' ) {
+				properties.styles[style.property] = value;
+			}
+		} );
+
+		return properties;
+
+	}
+
+	/**
+	 * Get a list of all element pairs that we can animate
+	 * between the given slides.
+	 *
+	 * @param {HTMLElement} fromSlide
+	 * @param {HTMLElement} toSlide
+	 *
+	 * @return {Array} Each value is an array where [0] is
+	 * the element we're animating from and [1] is the
+	 * element we're animating to
+	 */
+	getAutoAnimatableElements( fromSlide, toSlide ) {
+
+		let matcher = typeof this.Reveal.getConfig().autoAnimateMatcher === 'function' ? this.Reveal.getConfig().autoAnimateMatcher : this.getAutoAnimatePairs;
+
+		let pairs = matcher.call( this, fromSlide, toSlide );
+
+		let reserved = [];
+
+		// Remove duplicate pairs
+		return pairs.filter( ( pair, index ) => {
+			if( reserved.indexOf( pair.to ) === -1 ) {
+				reserved.push( pair.to );
+				return true;
+			}
+		} );
+
+	}
+
+	/**
+	 * Identifies matching elements between slides.
+	 *
+	 * You can specify a custom matcher function by using
+	 * the `autoAnimateMatcher` config option.
+	 */
+	getAutoAnimatePairs( fromSlide, toSlide ) {
+
+		let pairs = [];
+
+		const codeNodes = 'pre';
+		const textNodes = 'h1, h2, h3, h4, h5, h6, p, li';
+		const mediaNodes = 'img, video, iframe';
+
+		// Eplicit matches via data-id
+		this.findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {
+			return node.nodeName + ':::' + node.getAttribute( 'data-id' );
+		} );
+
+		// Text
+		this.findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, node => {
+			return node.nodeName + ':::' + node.innerText;
+		} );
+
+		// Media
+		this.findAutoAnimateMatches( pairs, fromSlide, toSlide, mediaNodes, node => {
+			return node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) );
+		} );
+
+		// Code
+		this.findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, node => {
+			return node.nodeName + ':::' + node.innerText;
+		} );
+
+		pairs.forEach( pair => {
+
+			// Disable scale transformations on text nodes, we transition
+			// each individual text property instead
+			if( matches( pair.from, textNodes ) ) {
+				pair.options = { scale: false };
+			}
+			// Animate individual lines of code
+			else if( matches( pair.from, codeNodes ) ) {
+
+				// Transition the code block's width and height instead of scaling
+				// to prevent its content from being squished
+				pair.options = { scale: false, styles: [ 'width', 'height' ] };
+
+				// Lines of code
+				this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-code', node => {
+					return node.textContent;
+				}, {
+					scale: false,
+					styles: [],
+					measure: this.getLocalBoundingBox.bind( this )
+				} );
+
+				// Line numbers
+				this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-line[data-line-number]', node => {
+					return node.getAttribute( 'data-line-number' );
+				}, {
+					scale: false,
+					styles: [ 'width' ],
+					measure: this.getLocalBoundingBox.bind( this )
+				} );
+
+			}
+
+		}, this );
+
+		return pairs;
+
+	}
+
+	/**
+	 * Helper method which returns a bounding box based on
+	 * the given elements offset coordinates.
+	 *
+	 * @param {HTMLElement} element
+	 * @return {Object} x, y, width, height
+	 */
+	getLocalBoundingBox( element ) {
+
+		const presentationScale = this.Reveal.getScale();
+
+		return {
+			x: Math.round( ( element.offsetLeft * presentationScale ) * 100 ) / 100,
+			y: Math.round( ( element.offsetTop * presentationScale ) * 100 ) / 100,
+			width: Math.round( ( element.offsetWidth * presentationScale ) * 100 ) / 100,
+			height: Math.round( ( element.offsetHeight * presentationScale ) * 100 ) / 100
+		};
+
+	}
+
+	/**
+	 * Finds matching elements between two slides.
+	 *
+	 * @param {Array} pairs            	List of pairs to push matches to
+	 * @param {HTMLElement} fromScope   Scope within the from element exists
+	 * @param {HTMLElement} toScope     Scope within the to element exists
+	 * @param {String} selector         CSS selector of the element to match
+	 * @param {Function} serializer     A function that accepts an element and returns
+	 *                                  a stringified ID based on its contents
+	 * @param {Object} animationOptions Optional config options for this pair
+	 */
+	findAutoAnimateMatches( pairs, fromScope, toScope, selector, serializer, animationOptions ) {
+
+		let fromMatches = {};
+		let toMatches = {};
+
+		[].slice.call( fromScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {
+			const key = serializer( element );
+			if( typeof key === 'string' && key.length ) {
+				fromMatches[key] = fromMatches[key] || [];
+				fromMatches[key].push( element );
+			}
+		} );
+
+		[].slice.call( toScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {
+			const key = serializer( element );
+			toMatches[key] = toMatches[key] || [];
+			toMatches[key].push( element );
+
+			let fromElement;
+
+			// Retrieve the 'from' element
+			if( fromMatches[key] ) {
+				const pimaryIndex = toMatches[key].length - 1;
+				const secondaryIndex = fromMatches[key].length - 1;
+
+				// If there are multiple identical from elements, retrieve
+				// the one at the same index as our to-element.
+				if( fromMatches[key][ pimaryIndex ] ) {
+					fromElement = fromMatches[key][ pimaryIndex ];
+					fromMatches[key][ pimaryIndex ] = null;
+				}
+				// If there are no matching from-elements at the same index,
+				// use the last one.
+				else if( fromMatches[key][ secondaryIndex ] ) {
+					fromElement = fromMatches[key][ secondaryIndex ];
+					fromMatches[key][ secondaryIndex ] = null;
+				}
+			}
+
+			// If we've got a matching pair, push it to the list of pairs
+			if( fromElement ) {
+				pairs.push({
+					from: fromElement,
+					to: element,
+					options: animationOptions
+				});
+			}
+		} );
+
+	}
+
+	/**
+	 * Returns a all elements within the given scope that should
+	 * be considered unmatched in an auto-animate transition. If
+	 * fading of unmatched elements is turned on, these elements
+	 * will fade when going between auto-animate slides.
+	 *
+	 * Note that parents of auto-animate targets are NOT considerd
+	 * unmatched since fading them would break the auto-animation.
+	 *
+	 * @param {HTMLElement} rootElement
+	 * @return {Array}
+	 */
+	getUnmatchedAutoAnimateElements( rootElement ) {
+
+		return [].slice.call( rootElement.children ).reduce( ( result, element ) => {
+
+			const containsAnimatedElements = element.querySelector( '[data-auto-animate-target]' );
+
+			// The element is unmatched if
+			// - It is not an auto-animate target
+			// - It does not contain any auto-animate targets
+			if( !element.hasAttribute( 'data-auto-animate-target' ) && !containsAnimatedElements ) {
+				result.push( element );
+			}
+
+			if( element.querySelector( '[data-auto-animate-target]' ) ) {
+				result = result.concat( this.getUnmatchedAutoAnimateElements( element ) );
+			}
+
+			return result;
+
+		}, [] );
+
+	}
+
+}

js/controllers/backgrounds.js

@@ -0,0 +1,397 @@
+import { queryAll } from '../utils/util.js'
+import { colorToRgb, colorBrightness } from '../utils/color.js'
+
+/**
+ * Creates and updates slide backgrounds.
+ */
+export default class Backgrounds {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+	}
+
+	render() {
+
+		this.element = document.createElement( 'div' );
+		this.element.className = 'backgrounds';
+		this.Reveal.getRevealElement().appendChild( this.element );
+
+	}
+
+	/**
+	 * Creates the slide background elements and appends them
+	 * to the background container. One element is created per
+	 * slide no matter if the given slide has visible background.
+	 */
+	create() {
+
+		let printMode = this.Reveal.isPrintingPDF();
+
+		// Clear prior backgrounds
+		this.element.innerHTML = '';
+		this.element.classList.add( 'no-transition' );
+
+		// Iterate over all horizontal slides
+		this.Reveal.getHorizontalSlides().forEach( slideh => {
+
+			let backgroundStack = this.createBackground( slideh, this.element );
+
+			// Iterate over all vertical slides
+			queryAll( slideh, 'section' ).forEach( slidev => {
+
+				this.createBackground( slidev, backgroundStack );
+
+				backgroundStack.classList.add( 'stack' );
+
+			} );
+
+		} );
+
+		// Add parallax background if specified
+		if( 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;
+
+			// Make sure the below properties are set on the element - these properties are
+			// needed for proper transitions to be set on the element via CSS. To remove
+			// annoying background slide-in effect when the presentation starts, apply
+			// these properties after short time delay
+			setTimeout( () => {
+				this.Reveal.getRevealElement().classList.add( 'has-parallax-background' );
+			}, 1 );
+
+		}
+		else {
+
+			this.element.style.backgroundImage = '';
+			this.Reveal.getRevealElement().classList.remove( 'has-parallax-background' );
+
+		}
+
+	}
+
+	/**
+	 * Creates a background for the given slide.
+	 *
+	 * @param {HTMLElement} slide
+	 * @param {HTMLElement} container The element that the background
+	 * should be appended to
+	 * @return {HTMLElement} New background div
+	 */
+	createBackground( slide, container ) {
+
+		// Main slide background element
+		let element = document.createElement( 'div' );
+		element.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' );
+
+		// Inner background element that wraps images/videos/iframes
+		let contentElement = document.createElement( 'div' );
+		contentElement.className = 'slide-background-content';
+
+		element.appendChild( contentElement );
+		container.appendChild( element );
+
+		slide.slideBackgroundElement = element;
+		slide.slideBackgroundContentElement = contentElement;
+
+		// Syncs the background to reflect all current background settings
+		this.sync( slide );
+
+		return element;
+
+	}
+
+	/**
+	 * Renders all of the visual properties of a slide background
+	 * based on the various background attributes.
+	 *
+	 * @param {HTMLElement} slide
+	 */
+	sync( slide ) {
+
+		let element = slide.slideBackgroundElement,
+			contentElement = slide.slideBackgroundContentElement;
+
+		// Reset the prior background state in case this is not the
+		// initial sync
+		slide.classList.remove( 'has-dark-background' );
+		slide.classList.remove( 'has-light-background' );
+
+		element.removeAttribute( 'data-loaded' );
+		element.removeAttribute( 'data-background-hash' );
+		element.removeAttribute( 'data-background-size' );
+		element.removeAttribute( 'data-background-transition' );
+		element.style.backgroundColor = '';
+
+		contentElement.style.backgroundSize = '';
+		contentElement.style.backgroundRepeat = '';
+		contentElement.style.backgroundPosition = '';
+		contentElement.style.backgroundImage = '';
+		contentElement.style.opacity = '';
+		contentElement.innerHTML = '';
+
+		let data = {
+			background: slide.getAttribute( 'data-background' ),
+			backgroundSize: slide.getAttribute( 'data-background-size' ),
+			backgroundImage: slide.getAttribute( 'data-background-image' ),
+			backgroundVideo: slide.getAttribute( 'data-background-video' ),
+			backgroundIframe: slide.getAttribute( 'data-background-iframe' ),
+			backgroundColor: slide.getAttribute( 'data-background-color' ),
+			backgroundRepeat: slide.getAttribute( 'data-background-repeat' ),
+			backgroundPosition: slide.getAttribute( 'data-background-position' ),
+			backgroundTransition: slide.getAttribute( 'data-background-transition' ),
+			backgroundOpacity: slide.getAttribute( 'data-background-opacity' )
+		};
+
+		if( data.background ) {
+			// Auto-wrap image urls in url(...)
+			if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp)([?#\s]|$)/gi.test( data.background ) ) {
+				slide.setAttribute( 'data-background-image', data.background );
+			}
+			else {
+				element.style.background = data.background;
+			}
+		}
+
+		// Create a hash for this combination of background settings.
+		// This is used to determine when two slide backgrounds are
+		// the same.
+		if( data.background || data.backgroundColor || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {
+			element.setAttribute( 'data-background-hash', data.background +
+															data.backgroundSize +
+															data.backgroundImage +
+															data.backgroundVideo +
+															data.backgroundIframe +
+															data.backgroundColor +
+															data.backgroundRepeat +
+															data.backgroundPosition +
+															data.backgroundTransition +
+															data.backgroundOpacity );
+		}
+
+		// Additional and optional background properties
+		if( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize );
+		if( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor;
+		if( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );
+
+		if( slide.hasAttribute( 'data-preload' ) ) element.setAttribute( 'data-preload', '' );
+
+		// Background image options are set on the content wrapper
+		if( data.backgroundSize ) contentElement.style.backgroundSize = data.backgroundSize;
+		if( data.backgroundRepeat ) contentElement.style.backgroundRepeat = data.backgroundRepeat;
+		if( data.backgroundPosition ) contentElement.style.backgroundPosition = data.backgroundPosition;
+		if( data.backgroundOpacity ) contentElement.style.opacity = data.backgroundOpacity;
+
+		// If this slide has a background color, we add a class that
+		// signals if it is light or dark. If the slide has no background
+		// color, no class will be added
+		let contrastColor = data.backgroundColor;
+
+		// If no bg color was found, check the computed background
+		if( !contrastColor ) {
+			let computedBackgroundStyle = window.getComputedStyle( element );
+			if( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {
+				contrastColor = computedBackgroundStyle.backgroundColor;
+			}
+		}
+
+		if( contrastColor ) {
+			let rgb = colorToRgb( contrastColor );
+
+			// Ignore fully transparent backgrounds. Some browsers return
+			// rgba(0,0,0,0) when reading the computed background color of
+			// an element with no background
+			if( rgb && rgb.a !== 0 ) {
+				if( colorBrightness( contrastColor ) < 128 ) {
+					slide.classList.add( 'has-dark-background' );
+				}
+				else {
+					slide.classList.add( 'has-light-background' );
+				}
+			}
+		}
+
+	}
+
+	/**
+	 * Updates the background elements to reflect the current
+	 * slide.
+	 *
+	 * @param {boolean} includeAll If true, the backgrounds of
+	 * all vertical slides (not just the present) will be updated.
+	 */
+	update( includeAll = false ) {
+
+		let currentSlide = this.Reveal.getCurrentSlide();
+		let indices = this.Reveal.getIndices();
+
+		let currentBackground = null;
+
+		// Reverse past/future classes when in RTL mode
+		let horizontalPast = this.Reveal.getConfig().rtl ? 'future' : 'past',
+			horizontalFuture = this.Reveal.getConfig().rtl ? 'past' : 'future';
+
+		// Update the classes of all backgrounds to match the
+		// states of their slides (past/present/future)
+		Array.from( this.element.childNodes ).forEach( ( backgroundh, h ) => {
+
+			backgroundh.classList.remove( 'past', 'present', 'future' );
+
+			if( h < indices.h ) {
+				backgroundh.classList.add( horizontalPast );
+			}
+			else if ( h > indices.h ) {
+				backgroundh.classList.add( horizontalFuture );
+			}
+			else {
+				backgroundh.classList.add( 'present' );
+
+				// Store a reference to the current background element
+				currentBackground = backgroundh;
+			}
+
+			if( includeAll || h === indices.h ) {
+				queryAll( backgroundh, '.slide-background' ).forEach( ( backgroundv, v ) => {
+
+					backgroundv.classList.remove( 'past', 'present', 'future' );
+
+					if( v < indices.v ) {
+						backgroundv.classList.add( 'past' );
+					}
+					else if ( v > indices.v ) {
+						backgroundv.classList.add( 'future' );
+					}
+					else {
+						backgroundv.classList.add( 'present' );
+
+						// Only if this is the present horizontal and vertical slide
+						if( h === indices.h ) currentBackground = backgroundv;
+					}
+
+				} );
+			}
+
+		} );
+
+		// Stop content inside of previous backgrounds
+		if( this.previousBackground ) {
+
+			this.Reveal.slideContent.stopEmbeddedContent( this.previousBackground, { unloadIframes: !this.Reveal.slideContent.shouldPreload( this.previousBackground ) } );
+
+		}
+
+		// Start content in the current background
+		if( currentBackground ) {
+
+			this.Reveal.slideContent.startEmbeddedContent( currentBackground );
+
+			let currentBackgroundContent = currentBackground.querySelector( '.slide-background-content' );
+			if( currentBackgroundContent ) {
+
+				let backgroundImageURL = currentBackgroundContent.style.backgroundImage || '';
+
+				// Restart GIFs (doesn't work in Firefox)
+				if( /\.gif/i.test( backgroundImageURL ) ) {
+					currentBackgroundContent.style.backgroundImage = '';
+					window.getComputedStyle( currentBackgroundContent ).opacity;
+					currentBackgroundContent.style.backgroundImage = backgroundImageURL;
+				}
+
+			}
+
+			// Don't transition between identical backgrounds. This
+			// prevents unwanted flicker.
+			let previousBackgroundHash = this.previousBackground ? this.previousBackground.getAttribute( 'data-background-hash' ) : null;
+			let currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );
+			if( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== this.previousBackground ) {
+				this.element.classList.add( 'no-transition' );
+			}
+
+			this.previousBackground = currentBackground;
+
+		}
+
+		// If there's a background brightness flag for this slide,
+		// bubble it to the .reveal container
+		if( currentSlide ) {
+			[ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {
+				if( currentSlide.classList.contains( classToBubble ) ) {
+					this.Reveal.getRevealElement().classList.add( classToBubble );
+				}
+				else {
+					this.Reveal.getRevealElement().classList.remove( classToBubble );
+				}
+			}, this );
+		}
+
+		// Allow the first background to apply without transition
+		setTimeout( () => {
+			this.element.classList.remove( 'no-transition' );
+		}, 1 );
+
+	}
+
+	/**
+	 * Updates the position of the parallax background based
+	 * on the current slide index.
+	 */
+	updateParallax() {
+
+		let indices = this.Reveal.getIndices();
+
+		if( this.Reveal.getConfig().parallaxBackgroundImage ) {
+
+			let horizontalSlides = this.Reveal.getHorizontalSlides(),
+				verticalSlides = this.Reveal.getVerticalSlides();
+
+			let backgroundSize = this.element.style.backgroundSize.split( ' ' ),
+				backgroundWidth, backgroundHeight;
+
+			if( backgroundSize.length === 1 ) {
+				backgroundWidth = backgroundHeight = parseInt( backgroundSize[0], 10 );
+			}
+			else {
+				backgroundWidth = parseInt( backgroundSize[0], 10 );
+				backgroundHeight = parseInt( backgroundSize[1], 10 );
+			}
+
+			let slideWidth = this.element.offsetWidth,
+				horizontalSlideCount = horizontalSlides.length,
+				horizontalOffsetMultiplier,
+				horizontalOffset;
+
+			if( typeof this.Reveal.getConfig().parallaxBackgroundHorizontal === 'number' ) {
+				horizontalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundHorizontal;
+			}
+			else {
+				horizontalOffsetMultiplier = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0;
+			}
+
+			horizontalOffset = horizontalOffsetMultiplier * indices.h * -1;
+
+			let slideHeight = this.element.offsetHeight,
+				verticalSlideCount = verticalSlides.length,
+				verticalOffsetMultiplier,
+				verticalOffset;
+
+			if( typeof this.Reveal.getConfig().parallaxBackgroundVertical === 'number' ) {
+				verticalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundVertical;
+			}
+			else {
+				verticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 );
+			}
+
+			verticalOffset = verticalSlideCount > 0 ?  verticalOffsetMultiplier * indices.v : 0;
+
+			this.element.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';
+
+		}
+
+	}
+
+}

js/controllers/controls.js

@@ -0,0 +1,259 @@
+import { queryAll } from '../utils/util.js'
+import { isAndroid } from '../utils/device.js'
+
+/**
+ * Manages our presentation controls. This includes both
+ * the built-in control arrows as well as event monitoring
+ * of any elements within the presentation with either of the
+ * following helper classes:
+ * - .navigate-up
+ * - .navigate-right
+ * - .navigate-down
+ * - .navigate-left
+ * - .navigate-next
+ * - .navigate-prev
+ */
+export default class Controls {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+		this.onNavigateLeftClicked = this.onNavigateLeftClicked.bind( this );
+		this.onNavigateRightClicked = this.onNavigateRightClicked.bind( this );
+		this.onNavigateUpClicked = this.onNavigateUpClicked.bind( this );
+		this.onNavigateDownClicked = this.onNavigateDownClicked.bind( this );
+		this.onNavigatePrevClicked = this.onNavigatePrevClicked.bind( this );
+		this.onNavigateNextClicked = this.onNavigateNextClicked.bind( this );
+
+	}
+
+	render() {
+
+		const rtl = this.Reveal.getConfig().rtl;
+		const revealElement = this.Reveal.getRevealElement();
+
+		this.element = document.createElement( 'aside' );
+		this.element.className = 'controls';
+		this.element.innerHTML =
+			`<button class="navigate-left" aria-label="${ rtl ? 'next slide' : 'previous slide' }"><div class="controls-arrow"></div></button>
+			<button class="navigate-right" aria-label="${ rtl ? 'previous slide' : 'next slide' }"><div class="controls-arrow"></div></button>
+			<button class="navigate-up" aria-label="above slide"><div class="controls-arrow"></div></button>
+			<button class="navigate-down" aria-label="below slide"><div class="controls-arrow"></div></button>`;
+
+		this.Reveal.getRevealElement().appendChild( this.element );
+
+		// There can be multiple instances of controls throughout the page
+		this.controlsLeft = queryAll( revealElement, '.navigate-left' );
+		this.controlsRight = queryAll( revealElement, '.navigate-right' );
+		this.controlsUp = queryAll( revealElement, '.navigate-up' );
+		this.controlsDown = queryAll( revealElement, '.navigate-down' );
+		this.controlsPrev = queryAll( revealElement, '.navigate-prev' );
+		this.controlsNext = queryAll( revealElement, '.navigate-next' );
+
+		// The left, right and down arrows in the standard reveal.js controls
+		this.controlsRightArrow = this.element.querySelector( '.navigate-right' );
+		this.controlsLeftArrow = this.element.querySelector( '.navigate-left' );
+		this.controlsDownArrow = this.element.querySelector( '.navigate-down' );
+
+	}
+
+	/**
+	 * Called when the reveal.js config is updated.
+	 */
+	configure( config, oldConfig ) {
+
+		this.element.style.display = config.controls ? 'block' : 'none';
+
+		this.element.setAttribute( 'data-controls-layout', config.controlsLayout );
+		this.element.setAttribute( 'data-controls-back-arrows', config.controlsBackArrows );
+
+	}
+
+	bind() {
+
+		// Listen to both touch and click events, in case the device
+		// supports both
+		let pointerEvents = [ 'touchstart', 'click' ];
+
+		// Only support touch for Android, fixes double navigations in
+		// stock browser
+		if( isAndroid ) {
+			pointerEvents = [ 'touchstart' ];
+		}
+
+		pointerEvents.forEach( eventName => {
+			this.controlsLeft.forEach( el => el.addEventListener( eventName, this.onNavigateLeftClicked, false ) );
+			this.controlsRight.forEach( el => el.addEventListener( eventName, this.onNavigateRightClicked, false ) );
+			this.controlsUp.forEach( el => el.addEventListener( eventName, this.onNavigateUpClicked, false ) );
+			this.controlsDown.forEach( el => el.addEventListener( eventName, this.onNavigateDownClicked, false ) );
+			this.controlsPrev.forEach( el => el.addEventListener( eventName, this.onNavigatePrevClicked, false ) );
+			this.controlsNext.forEach( el => el.addEventListener( eventName, this.onNavigateNextClicked, false ) );
+		} );
+
+	}
+
+	unbind() {
+
+		[ 'touchstart', 'click' ].forEach( eventName => {
+			this.controlsLeft.forEach( el => el.removeEventListener( eventName, this.onNavigateLeftClicked, false ) );
+			this.controlsRight.forEach( el => el.removeEventListener( eventName, this.onNavigateRightClicked, false ) );
+			this.controlsUp.forEach( el => el.removeEventListener( eventName, this.onNavigateUpClicked, false ) );
+			this.controlsDown.forEach( el => el.removeEventListener( eventName, this.onNavigateDownClicked, false ) );
+			this.controlsPrev.forEach( el => el.removeEventListener( eventName, this.onNavigatePrevClicked, false ) );
+			this.controlsNext.forEach( el => el.removeEventListener( eventName, this.onNavigateNextClicked, false ) );
+		} );
+
+	}
+
+	/**
+	 * Updates the state of all control/navigation arrows.
+	 */
+	update() {
+
+		let routes = this.Reveal.availableRoutes();
+
+		// Remove the 'enabled' class from all directions
+		[...this.controlsLeft, ...this.controlsRight, ...this.controlsUp, ...this.controlsDown, ...this.controlsPrev, ...this.controlsNext].forEach( node => {
+			node.classList.remove( 'enabled', 'fragmented' );
+
+			// Set 'disabled' attribute on all directions
+			node.setAttribute( 'disabled', 'disabled' );
+		} );
+
+		// Add the 'enabled' class to the available routes; remove 'disabled' attribute to enable buttons
+		if( routes.left ) this.controlsLeft.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+		if( routes.right ) this.controlsRight.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+		if( routes.up ) this.controlsUp.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+		if( routes.down ) this.controlsDown.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+
+		// Prev/next buttons
+		if( routes.left || routes.up ) this.controlsPrev.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+		if( routes.right || routes.down ) this.controlsNext.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );
+
+		// Highlight fragment directions
+		let currentSlide = this.Reveal.getCurrentSlide();
+		if( currentSlide ) {
+
+			let fragmentsRoutes = this.Reveal.fragments.availableRoutes();
+
+			// Always apply fragment decorator to prev/next buttons
+			if( fragmentsRoutes.prev ) this.controlsPrev.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+			if( fragmentsRoutes.next ) this.controlsNext.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+
+			// Apply fragment decorators to directional buttons based on
+			// what slide axis they are in
+			if( this.Reveal.isVerticalSlide( currentSlide ) ) {
+				if( fragmentsRoutes.prev ) this.controlsUp.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+				if( fragmentsRoutes.next ) this.controlsDown.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+			}
+			else {
+				if( fragmentsRoutes.prev ) this.controlsLeft.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+				if( fragmentsRoutes.next ) this.controlsRight.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
+			}
+
+		}
+
+		if( this.Reveal.getConfig().controlsTutorial ) {
+
+			let indices = this.Reveal.getIndices();
+
+			// Highlight control arrows with an animation to ensure
+			// that the viewer knows how to navigate
+			if( !this.Reveal.hasNavigatedVertically() && routes.down ) {
+				this.controlsDownArrow.classList.add( 'highlight' );
+			}
+			else {
+				this.controlsDownArrow.classList.remove( 'highlight' );
+
+				if( this.Reveal.getConfig().rtl ) {
+
+					if( !this.Reveal.hasNavigatedHorizontally() && routes.left && indices.v === 0 ) {
+						this.controlsLeftArrow.classList.add( 'highlight' );
+					}
+					else {
+						this.controlsLeftArrow.classList.remove( 'highlight' );
+					}
+
+				} else {
+
+					if( !this.Reveal.hasNavigatedHorizontally() && routes.right && indices.v === 0 ) {
+						this.controlsRightArrow.classList.add( 'highlight' );
+					}
+					else {
+						this.controlsRightArrow.classList.remove( 'highlight' );
+					}
+				}
+			}
+		}
+	}
+
+	/**
+	 * Event handlers for navigation control buttons.
+	 */
+	onNavigateLeftClicked( event ) {
+
+		event.preventDefault();
+		this.Reveal.onUserInput();
+
+		if( this.Reveal.getConfig().navigationMode === 'linear' ) {
+			this.Reveal.prev();
+		}
+		else {
+			this.Reveal.left();
+		}
+
+	}
+
+	onNavigateRightClicked( event ) {
+
+		event.preventDefault();
+		this.Reveal.onUserInput();
+
+		if( this.Reveal.getConfig().navigationMode === 'linear' ) {
+			this.Reveal.next();
+		}
+		else {
+			this.Reveal.right();
+		}
+
+	}
+
+	onNavigateUpClicked( event ) {
+
+		event.preventDefault();
+		this.Reveal.onUserInput();
+
+		this.Reveal.up();
+
+	}
+
+	onNavigateDownClicked( event ) {
+
+		event.preventDefault();
+		this.Reveal.onUserInput();
+
+		this.Reveal.down();
+
+	}
+
+	onNavigatePrevClicked( event ) {
+
+		event.preventDefault();
+		this.Reveal.onUserInput();
+
+		this.Reveal.prev();
+
+	}
+
+	onNavigateNextClicked( event ) {
+
+		event.preventDefault();
+		this.Reveal.onUserInput();
+
+		this.Reveal.next();
+
+	}
+
+
+}

js/controllers/focus.js

@@ -0,0 +1,97 @@
+import { closest } from '../utils/util.js'
+
+/**
+ * Manages focus when a presentation is embedded. This
+ * helps us only capture keyboard from the presentation
+ * a user is currently interacting with in a page where
+ * multiple presentations are embedded.
+ */
+
+const STATE_FOCUS = 'focus';
+const STATE_BLUR = 'blur';
+
+export default class Focus {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+		this.onRevealPointerDown = this.onRevealPointerDown.bind( this );
+		this.onDocumentPointerDown = this.onDocumentPointerDown.bind( this );
+
+	}
+
+	/**
+	 * Called when the reveal.js config is updated.
+	 */
+	configure( config, oldConfig ) {
+
+		if( config.embedded ) {
+			this.blur();
+		}
+		else {
+			this.focus();
+			this.unbind();
+		}
+
+	}
+
+	bind() {
+
+		if( this.Reveal.getConfig().embedded ) {
+			this.Reveal.getRevealElement().addEventListener( 'pointerdown', this.onRevealPointerDown, false );
+		}
+
+	}
+
+	unbind() {
+
+		this.Reveal.getRevealElement().removeEventListener( 'pointerdown', this.onRevealPointerDown, false );
+		document.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false );
+
+	}
+
+	focus() {
+
+		if( this.state !== STATE_FOCUS ) {
+			this.Reveal.getRevealElement().classList.add( 'focused' );
+			document.addEventListener( 'pointerdown', this.onDocumentPointerDown, false );
+		}
+
+		this.state = STATE_FOCUS;
+
+	}
+
+	blur() {
+
+		if( this.state !== STATE_BLUR ) {
+			this.Reveal.getRevealElement().classList.remove( 'focused' );
+			document.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false );
+		}
+
+		this.state = STATE_BLUR;
+
+	}
+
+	isFocused() {
+
+		return this.state === STATE_FOCUS;
+
+	}
+
+	onRevealPointerDown( event ) {
+
+		this.focus();
+
+	}
+
+	onDocumentPointerDown( event ) {
+
+		let revealElement = closest( event.target, '.reveal' );
+		if( !revealElement || revealElement !== this.Reveal.getRevealElement() ) {
+			this.blur();
+		}
+
+	}
+
+}

js/controllers/fragments.js

@@ -0,0 +1,375 @@
+import { extend, queryAll } from '../utils/util.js'
+
+/**
+ * Handles sorting and navigation of slide fragments.
+ * Fragments are elements within a slide that are
+ * revealed/animated incrementally.
+ */
+export default class Fragments {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+	}
+
+	/**
+	 * Called when the reveal.js config is updated.
+	 */
+	configure( config, oldConfig ) {
+
+		if( config.fragments === false ) {
+			this.disable();
+		}
+		else if( oldConfig.fragments === false ) {
+			this.enable();
+		}
+
+	}
+
+	/**
+	 * If fragments are disabled in the deck, they should all be
+	 * visible rather than stepped through.
+	 */
+	disable() {
+
+		queryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {
+			element.classList.add( 'visible' );
+			element.classList.remove( 'current-fragment' );
+		} );
+
+	}
+
+	/**
+	 * Reverse of #disable(). Only called if fragments have
+	 * previously been disabled.
+	 */
+	enable() {
+
+		queryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {
+			element.classList.remove( 'visible' );
+			element.classList.remove( 'current-fragment' );
+		} );
+
+	}
+
+	/**
+	 * Returns an object describing the available fragment
+	 * directions.
+	 *
+	 * @return {{prev: boolean, next: boolean}}
+	 */
+	availableRoutes() {
+
+		let currentSlide = this.Reveal.getCurrentSlide();
+		if( currentSlide && this.Reveal.getConfig().fragments ) {
+			let fragments = currentSlide.querySelectorAll( '.fragment:not(.disabled)' );
+			let hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.disabled):not(.visible)' );
+
+			return {
+				prev: fragments.length - hiddenFragments.length > 0,
+				next: !!hiddenFragments.length
+			};
+		}
+		else {
+			return { prev: false, next: false };
+		}
+
+	}
+
+	/**
+	 * Return a sorted fragments list, ordered by an increasing
+	 * "data-fragment-index" attribute.
+	 *
+	 * Fragments will be revealed in the order that they are returned by
+	 * this function, so you can use the index attributes to control the
+	 * order of fragment appearance.
+	 *
+	 * To maintain a sensible default fragment order, fragments are presumed
+	 * to be passed in document order. This function adds a "fragment-index"
+	 * attribute to each node if such an attribute is not already present,
+	 * and sets that attribute to an integer value which is the position of
+	 * the fragment within the fragments list.
+	 *
+	 * @param {object[]|*} fragments
+	 * @param {boolean} grouped If true the returned array will contain
+	 * nested arrays for all fragments with the same index
+	 * @return {object[]} sorted Sorted array of fragments
+	 */
+	sort( fragments, grouped = false ) {
+
+		fragments = Array.from( fragments );
+
+		let ordered = [],
+			unordered = [],
+			sorted = [];
+
+		// Group ordered and unordered elements
+		fragments.forEach( fragment => {
+			if( fragment.hasAttribute( 'data-fragment-index' ) ) {
+				let index = parseInt( fragment.getAttribute( 'data-fragment-index' ), 10 );
+
+				if( !ordered[index] ) {
+					ordered[index] = [];
+				}
+
+				ordered[index].push( fragment );
+			}
+			else {
+				unordered.push( [ fragment ] );
+			}
+		} );
+
+		// Append fragments without explicit indices in their
+		// DOM order
+		ordered = ordered.concat( unordered );
+
+		// Manually count the index up per group to ensure there
+		// are no gaps
+		let index = 0;
+
+		// Push all fragments in their sorted order to an array,
+		// this flattens the groups
+		ordered.forEach( group => {
+			group.forEach( fragment => {
+				sorted.push( fragment );
+				fragment.setAttribute( 'data-fragment-index', index );
+			} );
+
+			index ++;
+		} );
+
+		return grouped === true ? ordered : sorted;
+
+	}
+
+	/**
+	 * Sorts and formats all of fragments in the
+	 * presentation.
+	 */
+	sortAll() {
+
+		this.Reveal.getHorizontalSlides().forEach( horizontalSlide => {
+
+			let verticalSlides = queryAll( horizontalSlide, 'section' );
+			verticalSlides.forEach( ( verticalSlide, y ) => {
+
+				this.sort( verticalSlide.querySelectorAll( '.fragment' ) );
+
+			}, this );
+
+			if( verticalSlides.length === 0 ) this.sort( horizontalSlide.querySelectorAll( '.fragment' ) );
+
+		} );
+
+	}
+
+	/**
+	 * Refreshes the fragments on the current slide so that they
+	 * have the appropriate classes (.visible + .current-fragment).
+	 *
+	 * @param {number} [index] The index of the current fragment
+	 * @param {array} [fragments] Array containing all fragments
+	 * in the current slide
+	 *
+	 * @return {{shown: array, hidden: array}}
+	 */
+	update( index, fragments ) {
+
+		let changedFragments = {
+			shown: [],
+			hidden: []
+		};
+
+		let currentSlide = this.Reveal.getCurrentSlide();
+		if( currentSlide && this.Reveal.getConfig().fragments ) {
+
+			fragments = fragments || this.sort( currentSlide.querySelectorAll( '.fragment' ) );
+
+			if( fragments.length ) {
+
+				let maxIndex = 0;
+
+				if( typeof index !== 'number' ) {
+					let currentFragment = this.sort( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop();
+					if( currentFragment ) {
+						index = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
+					}
+				}
+
+				Array.from( fragments ).forEach( ( el, i ) => {
+
+					if( el.hasAttribute( 'data-fragment-index' ) ) {
+						i = parseInt( el.getAttribute( 'data-fragment-index' ), 10 );
+					}
+
+					maxIndex = Math.max( maxIndex, i );
+
+					// Visible fragments
+					if( i <= index ) {
+						let wasVisible = el.classList.contains( 'visible' )
+						el.classList.add( 'visible' );
+						el.classList.remove( 'current-fragment' );
+
+						if( i === index ) {
+							// Announce the fragments one by one to the Screen Reader
+							this.Reveal.announceStatus( this.Reveal.getStatusText( el ) );
+
+							el.classList.add( 'current-fragment' );
+							this.Reveal.slideContent.startEmbeddedContent( el );
+						}
+
+						if( !wasVisible ) {
+							changedFragments.shown.push( el )
+							this.Reveal.dispatchEvent({
+								target: el,
+								type: 'visible',
+								bubbles: false
+							});
+						}
+					}
+					// Hidden fragments
+					else {
+						let wasVisible = el.classList.contains( 'visible' )
+						el.classList.remove( 'visible' );
+						el.classList.remove( 'current-fragment' );
+
+						if( wasVisible ) {
+							changedFragments.hidden.push( el );
+							this.Reveal.dispatchEvent({
+								target: el,
+								type: 'hidden',
+								bubbles: false
+							});
+						}
+					}
+
+				} );
+
+				// Write the current fragment index to the slide <section>.
+				// This can be used by end users to apply styles based on
+				// the current fragment index.
+				index = typeof index === 'number' ? index : -1;
+				index = Math.max( Math.min( index, maxIndex ), -1 );
+				currentSlide.setAttribute( 'data-fragment', index );
+
+			}
+
+		}
+
+		return changedFragments;
+
+	}
+
+	/**
+	 * Formats the fragments on the given slide so that they have
+	 * valid indices. Call this if fragments are changed in the DOM
+	 * after reveal.js has already initialized.
+	 *
+	 * @param {HTMLElement} slide
+	 * @return {Array} a list of the HTML fragments that were synced
+	 */
+	sync( slide = this.Reveal.getCurrentSlide() ) {
+
+		return this.sort( slide.querySelectorAll( '.fragment' ) );
+
+	}
+
+	/**
+	 * Navigate to the specified slide fragment.
+	 *
+	 * @param {?number} index The index of the fragment that
+	 * should be shown, -1 means all are invisible
+	 * @param {number} offset Integer offset to apply to the
+	 * fragment index
+	 *
+	 * @return {boolean} true if a change was made in any
+	 * fragments visibility as part of this call
+	 */
+	goto( index, offset = 0 ) {
+
+		let currentSlide = this.Reveal.getCurrentSlide();
+		if( currentSlide && this.Reveal.getConfig().fragments ) {
+
+			let fragments = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled)' ) );
+			if( fragments.length ) {
+
+				// If no index is specified, find the current
+				if( typeof index !== 'number' ) {
+					let lastVisibleFragment = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled).visible' ) ).pop();
+
+					if( lastVisibleFragment ) {
+						index = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
+					}
+					else {
+						index = -1;
+					}
+				}
+
+				// Apply the offset if there is one
+				index += offset;
+
+				let changedFragments = this.update( index, fragments );
+
+				if( changedFragments.hidden.length ) {
+					this.Reveal.dispatchEvent({
+						type: 'fragmenthidden',
+						data: {
+							fragment: changedFragments.hidden[0],
+							fragments: changedFragments.hidden
+						}
+					});
+				}
+
+				if( changedFragments.shown.length ) {
+					this.Reveal.dispatchEvent({
+						type: 'fragmentshown',
+						data: {
+							fragment: changedFragments.shown[0],
+							fragments: changedFragments.shown
+						}
+					});
+				}
+
+				this.Reveal.controls.update();
+				this.Reveal.progress.update();
+
+				if( this.Reveal.getConfig().fragmentInURL ) {
+					this.Reveal.location.writeURL();
+				}
+
+				return !!( changedFragments.shown.length || changedFragments.hidden.length );
+
+			}
+
+		}
+
+		return false;
+
+	}
+
+	/**
+	 * Navigate to the next slide fragment.
+	 *
+	 * @return {boolean} true if there was a next fragment,
+	 * false otherwise
+	 */
+	next() {
+
+		return this.goto( null, 1 );
+
+	}
+
+	/**
+	 * Navigate to the previous slide fragment.
+	 *
+	 * @return {boolean} true if there was a previous fragment,
+	 * false otherwise
+	 */
+	prev() {
+
+		return this.goto( null, -1 );
+
+	}
+
+}

js/controllers/keyboard.js

@@ -0,0 +1,388 @@
+import { enterFullscreen } from '../utils/util.js'
+
+/**
+ * Handles all reveal.js keyboard interactions.
+ */
+export default class Keyboard {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+		// A key:value map of keyboard keys and descriptions of
+		// the actions they trigger
+		this.shortcuts = {};
+
+		// Holds custom key code mappings
+		this.bindings = {};
+
+		this.onDocumentKeyDown = this.onDocumentKeyDown.bind( this );
+		this.onDocumentKeyPress = this.onDocumentKeyPress.bind( this );
+
+	}
+
+	/**
+	 * Called when the reveal.js config is updated.
+	 */
+	configure( config, oldConfig ) {
+
+		if( config.navigationMode === 'linear' ) {
+			this.shortcuts['→  ,  ↓  ,  SPACE  ,  N  ,  L  ,  J'] = 'Next slide';
+			this.shortcuts['←  ,  ↑  ,  P  ,  H  ,  K']           = 'Previous slide';
+		}
+		else {
+			this.shortcuts['N  ,  SPACE']   = 'Next slide';
+			this.shortcuts['P']             = 'Previous slide';
+			this.shortcuts['←  ,  H'] = 'Navigate left';
+			this.shortcuts['→  ,  L'] = 'Navigate right';
+			this.shortcuts['↑  ,  K'] = 'Navigate up';
+			this.shortcuts['↓  ,  J'] = 'Navigate down';
+		}
+
+		this.shortcuts['Home  ,  Shift ←']        = 'First slide';
+		this.shortcuts['End  ,  Shift →']         = 'Last slide';
+		this.shortcuts['B  ,  .']                       = 'Pause';
+		this.shortcuts['F']                             = 'Fullscreen';
+		this.shortcuts['ESC, O']                        = 'Slide overview';
+
+	}
+
+	/**
+	 * Starts listening for keyboard events.
+	 */
+	bind() {
+
+		document.addEventListener( 'keydown', this.onDocumentKeyDown, false );
+		document.addEventListener( 'keypress', this.onDocumentKeyPress, false );
+
+	}
+
+	/**
+	 * Stops listening for keyboard events.
+	 */
+	unbind() {
+
+		document.removeEventListener( 'keydown', this.onDocumentKeyDown, false );
+		document.removeEventListener( 'keypress', this.onDocumentKeyPress, false );
+
+	}
+
+	/**
+	 * Add a custom key binding with optional description to
+	 * be added to the help screen.
+	 */
+	addKeyBinding( binding, callback ) {
+
+		if( typeof binding === 'object' && binding.keyCode ) {
+			this.bindings[binding.keyCode] = {
+				callback: callback,
+				key: binding.key,
+				description: binding.description
+			};
+		}
+		else {
+			this.bindings[binding] = {
+				callback: callback,
+				key: null,
+				description: null
+			};
+		}
+
+	}
+
+	/**
+	 * Removes the specified custom key binding.
+	 */
+	removeKeyBinding( keyCode ) {
+
+		delete this.bindings[keyCode];
+
+	}
+
+	/**
+	 * Programmatically triggers a keyboard event
+	 *
+	 * @param {int} keyCode
+	 */
+	triggerKey( keyCode ) {
+
+		this.onDocumentKeyDown( { keyCode } );
+
+	}
+
+	/**
+	 * Registers a new shortcut to include in the help overlay
+	 *
+	 * @param {String} key
+	 * @param {String} value
+	 */
+	registerKeyboardShortcut( key, value ) {
+
+		this.shortcuts[key] = value;
+
+	}
+
+	getShortcuts() {
+
+		return this.shortcuts;
+
+	}
+
+	getBindings() {
+
+		return this.bindings;
+
+	}
+
+	/**
+	 * Handler for the document level 'keypress' event.
+	 *
+	 * @param {object} event
+	 */
+	onDocumentKeyPress( event ) {
+
+		// Check if the pressed key is question mark
+		if( event.shiftKey && event.charCode === 63 ) {
+			this.Reveal.toggleHelp();
+		}
+
+	}
+
+	/**
+	 * Handler for the document level 'keydown' event.
+	 *
+	 * @param {object} event
+	 */
+	onDocumentKeyDown( event ) {
+
+		let config = this.Reveal.getConfig();
+
+		// If there's a condition specified and it returns false,
+		// ignore this event
+		if( typeof config.keyboardCondition === 'function' && config.keyboardCondition(event) === false ) {
+			return true;
+		}
+
+		// If keyboardCondition is set, only capture keyboard events
+		// for embedded decks when they are focused
+		if( config.keyboardCondition === 'focused' && !this.Reveal.isFocused() ) {
+			return true;
+		}
+
+		// Shorthand
+		let keyCode = event.keyCode;
+
+		// Remember if auto-sliding was paused so we can toggle it
+		let autoSlideWasPaused = !this.Reveal.isAutoSliding();
+
+		this.Reveal.onUserInput( event );
+
+		// Is there a focused element that could be using the keyboard?
+		let activeElementIsCE = document.activeElement && document.activeElement.isContentEditable === true;
+		let activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName );
+		let activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);
+
+		// Whitelist specific modified + keycode combinations
+		let prevSlideShortcut = event.shiftKey && event.keyCode === 32;
+		let firstSlideShortcut = event.shiftKey && keyCode === 37;
+		let lastSlideShortcut = event.shiftKey && keyCode === 39;
+
+		// Prevent all other events when a modifier is pressed
+		let unusedModifier = 	!prevSlideShortcut && !firstSlideShortcut && !lastSlideShortcut &&
+								( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );
+
+		// Disregard the event if there's a focused element or a
+		// keyboard modifier key is present
+		if( activeElementIsCE || activeElementIsInput || activeElementIsNotes || unusedModifier ) return;
+
+		// While paused only allow resume keyboard events; 'b', 'v', '.'
+		let resumeKeyCodes = [66,86,190,191];
+		let key;
+
+		// Custom key bindings for togglePause should be able to resume
+		if( typeof config.keyboard === 'object' ) {
+			for( key in config.keyboard ) {
+				if( config.keyboard[key] === 'togglePause' ) {
+					resumeKeyCodes.push( parseInt( key, 10 ) );
+				}
+			}
+		}
+
+		if( this.Reveal.isPaused() && resumeKeyCodes.indexOf( keyCode ) === -1 ) {
+			return false;
+		}
+
+		// Use linear navigation if we're configured to OR if
+		// the presentation is one-dimensional
+		let useLinearMode = config.navigationMode === 'linear' || !this.Reveal.hasHorizontalSlides() || !this.Reveal.hasVerticalSlides();
+
+		let triggered = false;
+
+		// 1. User defined key bindings
+		if( typeof config.keyboard === 'object' ) {
+
+			for( key in config.keyboard ) {
+
+				// Check if this binding matches the pressed key
+				if( parseInt( key, 10 ) === keyCode ) {
+
+					let value = config.keyboard[ key ];
+
+					// Callback function
+					if( typeof value === 'function' ) {
+						value.apply( null, [ event ] );
+					}
+					// String shortcuts to reveal.js API
+					else if( typeof value === 'string' && typeof this.Reveal[ value ] === 'function' ) {
+						this.Reveal[ value ].call();
+					}
+
+					triggered = true;
+
+				}
+
+			}
+
+		}
+
+		// 2. Registered custom key bindings
+		if( triggered === false ) {
+
+			for( key in this.bindings ) {
+
+				// Check if this binding matches the pressed key
+				if( parseInt( key, 10 ) === keyCode ) {
+
+					let action = this.bindings[ key ].callback;
+
+					// Callback function
+					if( typeof action === 'function' ) {
+						action.apply( null, [ event ] );
+					}
+					// String shortcuts to reveal.js API
+					else if( typeof action === 'string' && typeof this.Reveal[ action ] === 'function' ) {
+						this.Reveal[ action ].call();
+					}
+
+					triggered = true;
+				}
+			}
+		}
+
+		// 3. System defined key bindings
+		if( triggered === false ) {
+
+			// Assume true and try to prove false
+			triggered = true;
+
+			// P, PAGE UP
+			if( keyCode === 80 || keyCode === 33 ) {
+				this.Reveal.prev();
+			}
+			// N, PAGE DOWN
+			else if( keyCode === 78 || keyCode === 34 ) {
+				this.Reveal.next();
+			}
+			// H, LEFT
+			else if( keyCode === 72 || keyCode === 37 ) {
+				if( firstSlideShortcut ) {
+					this.Reveal.slide( 0 );
+				}
+				else if( !this.Reveal.overview.isActive() && useLinearMode ) {
+					this.Reveal.prev();
+				}
+				else {
+					this.Reveal.left();
+				}
+			}
+			// L, RIGHT
+			else if( keyCode === 76 || keyCode === 39 ) {
+				if( lastSlideShortcut ) {
+					this.Reveal.slide( Number.MAX_VALUE );
+				}
+				else if( !this.Reveal.overview.isActive() && useLinearMode ) {
+					this.Reveal.next();
+				}
+				else {
+					this.Reveal.right();
+				}
+			}
+			// K, UP
+			else if( keyCode === 75 || keyCode === 38 ) {
+				if( !this.Reveal.overview.isActive() && useLinearMode ) {
+					this.Reveal.prev();
+				}
+				else {
+					this.Reveal.up();
+				}
+			}
+			// J, DOWN
+			else if( keyCode === 74 || keyCode === 40 ) {
+				if( !this.Reveal.overview.isActive() && useLinearMode ) {
+					this.Reveal.next();
+				}
+				else {
+					this.Reveal.down();
+				}
+			}
+			// HOME
+			else if( keyCode === 36 ) {
+				this.Reveal.slide( 0 );
+			}
+			// END
+			else if( keyCode === 35 ) {
+				this.Reveal.slide( Number.MAX_VALUE );
+			}
+			// SPACE
+			else if( keyCode === 32 ) {
+				if( this.Reveal.overview.isActive() ) {
+					this.Reveal.overview.deactivate();
+				}
+				if( event.shiftKey ) {
+					this.Reveal.prev();
+				}
+				else {
+					this.Reveal.next();
+				}
+			}
+			// TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS "BLACK SCREEN" BUTTON
+			else if( keyCode === 58 || keyCode === 59 || keyCode === 66 || keyCode === 86 || keyCode === 190 || keyCode === 191 ) {
+				this.Reveal.togglePause();
+			}
+			// F
+			else if( keyCode === 70 ) {
+				enterFullscreen( config.embedded ? this.Reveal.getViewportElement() : document.documentElement );
+			}
+			// A
+			else if( keyCode === 65 ) {
+				if ( config.autoSlideStoppable ) {
+					this.Reveal.toggleAutoSlide( autoSlideWasPaused );
+				}
+			}
+			else {
+				triggered = false;
+			}
+
+		}
+
+		// If the input resulted in a triggered action we should prevent
+		// the browsers default behavior
+		if( triggered ) {
+			event.preventDefault && event.preventDefault();
+		}
+		// ESC or O key
+		else if( keyCode === 27 || keyCode === 79 ) {
+			if( this.Reveal.closeOverlay() === false ) {
+				this.Reveal.overview.toggle();
+			}
+
+			event.preventDefault && event.preventDefault();
+		}
+
+		// If auto-sliding is enabled we need to cue up
+		// another timeout
+		this.Reveal.cueAutoSlide();
+
+	}
+
+}

js/controllers/location.js

@@ -0,0 +1,209 @@
+/**
+ * Reads and writes the URL based on reveal.js' current state.
+ */
+export default class Location {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+		// Delays updates to the URL due to a Chrome thumbnailer bug
+		this.writeURLTimeout = 0;
+
+		this.onWindowHashChange = this.onWindowHashChange.bind( this );
+
+	}
+
+	bind() {
+
+		window.addEventListener( 'hashchange', this.onWindowHashChange, false );
+
+	}
+
+	unbind() {
+
+		window.removeEventListener( 'hashchange', this.onWindowHashChange, false );
+
+	}
+
+	/**
+	 * Reads the current URL (hash) and navigates accordingly.
+	 */
+	readURL() {
+
+		let config = this.Reveal.getConfig();
+		let indices = this.Reveal.getIndices();
+		let currentSlide = this.Reveal.getCurrentSlide();
+
+		let hash = window.location.hash;
+
+		// Attempt to parse the hash as either an index or name
+		let bits = hash.slice( 2 ).split( '/' ),
+			name = hash.replace( /#\/?/gi, '' );
+
+		// If the first bit is not fully numeric and there is a name we
+		// can assume that this is a named link
+		if( !/^[0-9]*$/.test( bits[0] ) && name.length ) {
+			let element;
+
+			let f;
+
+			// Parse named links with fragments (#/named-link/2)
+			if( /\/[-\d]+$/g.test( name ) ) {
+				f = parseInt( name.split( '/' ).pop(), 10 );
+				f = isNaN(f) ? undefined : f;
+				name = name.split( '/' ).shift();
+			}
+
+			// Ensure the named link is a valid HTML ID attribute
+			try {
+				element = document.getElementById( decodeURIComponent( name ) );
+			}
+			catch ( error ) { }
+
+			// Ensure that we're not already on a slide with the same name
+			let isSameNameAsCurrentSlide = currentSlide ? currentSlide.getAttribute( 'id' ) === name : false;
+
+			if( element ) {
+				// If the slide exists and is not the current slide...
+				if ( !isSameNameAsCurrentSlide || typeof f !== 'undefined' ) {
+					// ...find the position of the named slide and navigate to it
+					let slideIndices = this.Reveal.getIndices( element );
+					this.Reveal.slide( slideIndices.h, slideIndices.v, f );
+				}
+			}
+			// If the slide doesn't exist, navigate to the current slide
+			else {
+				this.Reveal.slide( indices.h || 0, indices.v || 0 );
+			}
+		}
+		else {
+			let hashIndexBase = config.hashOneBasedIndex ? 1 : 0;
+
+			// Read the index components of the hash
+			let h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,
+				v = ( parseInt( bits[1], 10 ) - hashIndexBase ) || 0,
+				f;
+
+			if( config.fragmentInURL ) {
+				f = parseInt( bits[2], 10 );
+				if( isNaN( f ) ) {
+					f = undefined;
+				}
+			}
+
+			if( h !== indices.h || v !== indices.v || f !== undefined ) {
+				this.Reveal.slide( h, v, f );
+			}
+		}
+
+	}
+
+	/**
+	 * Updates the page URL (hash) to reflect the current
+	 * state.
+	 *
+	 * @param {number} delay The time in ms to wait before
+	 * writing the hash
+	 */
+	writeURL( delay ) {
+
+		let config = this.Reveal.getConfig();
+		let currentSlide = this.Reveal.getCurrentSlide();
+
+		// Make sure there's never more than one timeout running
+		clearTimeout( this.writeURLTimeout );
+
+		// If a delay is specified, timeout this call
+		if( typeof delay === 'number' ) {
+			this.writeURLTimeout = setTimeout( this.writeURL, delay );
+		}
+		else if( currentSlide ) {
+
+			let hash = this.getHash();
+
+			// If we're configured to push to history OR the history
+			// API is not avaialble.
+			if( config.history ) {
+				window.location.hash = hash;
+			}
+			// If we're configured to reflect the current slide in the
+			// URL without pushing to history.
+			else if( config.hash ) {
+				// If the hash is empty, don't add it to the URL
+				if( hash === '/' ) {
+					window.history.replaceState( null, null, window.location.pathname + window.location.search );
+				}
+				else {
+					window.history.replaceState( null, null, '#' + hash );
+				}
+			}
+			// UPDATE: The below nuking of all hash changes breaks
+			// anchors on pages where reveal.js is running. Removed
+			// in 4.0. Why was it here in the first place? ¯\_(ツ)_/¯
+			//
+			// If history and hash are both disabled, a hash may still
+			// be added to the URL by clicking on a href with a hash
+			// target. Counter this by always removing the hash.
+			// else {
+			// 	window.history.replaceState( null, null, window.location.pathname + window.location.search );
+			// }
+
+		}
+
+	}
+
+	/**
+	 * Return a hash URL that will resolve to the given slide location.
+	 *
+	 * @param {HTMLElement} [slide=currentSlide] The slide to link to
+	 */
+	getHash( slide ) {
+
+		let url = '/';
+
+		// Attempt to create a named link based on the slide's ID
+		let s = slide || this.Reveal.getCurrentSlide();
+		let id = s ? s.getAttribute( 'id' ) : null;
+		if( id ) {
+			id = encodeURIComponent( id );
+		}
+
+		let index = this.Reveal.getIndices( slide );
+		if( !this.Reveal.getConfig().fragmentInURL ) {
+			index.f = undefined;
+		}
+
+		// If the current slide has an ID, use that as a named link,
+		// but we don't support named links with a fragment index
+		if( typeof id === 'string' && id.length ) {
+			url = '/' + id;
+
+			// If there is also a fragment, append that at the end
+			// of the named link, like: #/named-link/2
+			if( index.f >= 0 ) url += '/' + index.f;
+		}
+		// Otherwise use the /h/v index
+		else {
+			let hashIndexBase = this.Reveal.getConfig().hashOneBasedIndex ? 1 : 0;
+			if( index.h > 0 || index.v > 0 || index.f >= 0 ) url += index.h + hashIndexBase;
+			if( index.v > 0 || index.f >= 0 ) url += '/' + (index.v + hashIndexBase );
+			if( index.f >= 0 ) url += '/' + index.f;
+		}
+
+		return url;
+
+	}
+
+	/**
+	 * Handler for the window level 'hashchange' event.
+	 *
+	 * @param {object} [event]
+	 */
+	onWindowHashChange( event ) {
+
+		this.readURL();
+
+	}
+
+}

js/controllers/notes.js

@@ -0,0 +1,114 @@
+/**
+ * Handles the showing and 
+ */
+export default class Notes {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+	}
+
+	render() {
+
+		this.element = document.createElement( 'div' );
+		this.element.className = 'speaker-notes';
+		this.element.setAttribute( 'data-prevent-swipe', '' );
+		this.element.setAttribute( 'tabindex', '0' );
+		this.Reveal.getRevealElement().appendChild( this.element );
+
+	}
+
+	/**
+	 * Called when the reveal.js config is updated.
+	 */
+	configure( config, oldConfig ) {
+
+		if( config.showNotes ) {
+			this.element.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' );
+		}
+
+	}
+
+	/**
+	 * Pick up notes from the current slide and display them
+	 * to the viewer.
+	 *
+	 * @see {@link config.showNotes}
+	 */
+	update() {
+
+		if( this.Reveal.getConfig().showNotes && this.element && this.Reveal.getCurrentSlide() && !this.Reveal.print.isPrintingPDF() ) {
+
+			this.element.innerHTML = this.getSlideNotes() || '<span class="notes-placeholder">No notes on this slide.</span>';
+
+		}
+
+	}
+
+	/**
+	 * Updates the visibility of the speaker notes sidebar that
+	 * is used to share annotated slides. The notes sidebar is
+	 * only visible if showNotes is true and there are notes on
+	 * one or more slides in the deck.
+	 */
+	updateVisibility() {
+
+		if( this.Reveal.getConfig().showNotes && this.hasNotes() && !this.Reveal.print.isPrintingPDF() ) {
+			this.Reveal.getRevealElement().classList.add( 'show-notes' );
+		}
+		else {
+			this.Reveal.getRevealElement().classList.remove( 'show-notes' );
+		}
+
+	}
+
+	/**
+	 * Checks if there are speaker notes for ANY slide in the
+	 * presentation.
+	 */
+	hasNotes() {
+
+		return this.Reveal.getSlidesElement().querySelectorAll( '[data-notes], aside.notes' ).length > 0;
+
+	}
+
+	/**
+	 * Checks if this presentation is running inside of the
+	 * speaker notes window.
+	 *
+	 * @return {boolean}
+	 */
+	isSpeakerNotesWindow() {
+
+		return !!window.location.search.match( /receiver/gi );
+
+	}
+
+	/**
+	 * Retrieves the speaker notes from a slide. Notes can be
+	 * defined in two ways:
+	 * 1. As a data-notes attribute on the slide <section>
+	 * 2. As an <aside class="notes"> inside of the slide
+	 *
+	 * @param {HTMLElement} [slide=currentSlide]
+	 * @return {(string|null)}
+	 */
+	getSlideNotes( slide = this.Reveal.getCurrentSlide() ) {
+
+		// Notes can be specified via the data-notes attribute...
+		if( slide.hasAttribute( 'data-notes' ) ) {
+			return slide.getAttribute( 'data-notes' );
+		}
+
+		// ... or using an <aside class="notes"> element
+		let notesElement = slide.querySelector( 'aside.notes' );
+		if( notesElement ) {
+			return notesElement.innerHTML;
+		}
+
+		return null;
+
+	}
+
+}

js/controllers/overview.js

@@ -0,0 +1,255 @@
+import { SLIDES_SELECTOR } from '../utils/constants.js'
+import { extend, queryAll, transformElement } from '../utils/util.js'
+
+/**
+ * Handles all logic related to the overview mode
+ * (birds-eye view of all slides).
+ */
+export default class Overview {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+		this.active = false;
+
+		this.onSlideClicked = this.onSlideClicked.bind( this );
+
+	}
+
+	/**
+	 * Displays the overview of slides (quick nav) by scaling
+	 * down and arranging all slide elements.
+	 */
+	activate() {
+
+		// Only proceed if enabled in config
+		if( this.Reveal.getConfig().overview && !this.isActive() ) {
+
+			this.active = true;
+
+			this.Reveal.getRevealElement().classList.add( 'overview' );
+
+			// Don't auto-slide while in overview mode
+			this.Reveal.cancelAutoSlide();
+
+			// Move the backgrounds element into the slide container to
+			// that the same scaling is applied
+			this.Reveal.getSlidesElement().appendChild( this.Reveal.getBackgroundsElement() );
+
+			// Clicking on an overview slide navigates to it
+			queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {
+				if( !slide.classList.contains( 'stack' ) ) {
+					slide.addEventListener( 'click', this.onSlideClicked, true );
+				}
+			} );
+
+			// Calculate slide sizes
+			const margin = 70;
+			const slideSize = this.Reveal.getComputedSlideSize();
+			this.overviewSlideWidth = slideSize.width + margin;
+			this.overviewSlideHeight = slideSize.height + margin;
+
+			// Reverse in RTL mode
+			if( this.Reveal.getConfig().rtl ) {
+				this.overviewSlideWidth = -this.overviewSlideWidth;
+			}
+
+			this.Reveal.updateSlidesVisibility();
+
+			this.layout();
+			this.update();
+
+			this.Reveal.layout();
+
+			const indices = this.Reveal.getIndices();
+
+			// Notify observers of the overview showing
+			this.Reveal.dispatchEvent({
+				type: 'overviewshown',
+				data: {
+					'indexh': indices.h,
+					'indexv': indices.v,
+					'currentSlide': this.Reveal.getCurrentSlide()
+				}
+			});
+
+		}
+
+	}
+
+	/**
+	 * Uses CSS transforms to position all slides in a grid for
+	 * display inside of the overview mode.
+	 */
+	layout() {
+
+		// Layout slides
+		this.Reveal.getHorizontalSlides().forEach( ( hslide, h ) => {
+			hslide.setAttribute( 'data-index-h', h );
+			transformElement( hslide, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );
+
+			if( hslide.classList.contains( 'stack' ) ) {
+
+				queryAll( hslide, 'section' ).forEach( ( vslide, v ) => {
+					vslide.setAttribute( 'data-index-h', h );
+					vslide.setAttribute( 'data-index-v', v );
+
+					transformElement( vslide, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );
+				} );
+
+			}
+		} );
+
+		// Layout slide backgrounds
+		Array.from( this.Reveal.getBackgroundsElement().childNodes ).forEach( ( hbackground, h ) => {
+			transformElement( hbackground, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );
+
+			queryAll( hbackground, '.slide-background' ).forEach( ( vbackground, v ) => {
+				transformElement( vbackground, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );
+			} );
+		} );
+
+	}
+
+	/**
+	 * Moves the overview viewport to the current slides.
+	 * Called each time the current slide changes.
+	 */
+	update() {
+
+		const vmin = Math.min( window.innerWidth, window.innerHeight );
+		const scale = Math.max( vmin / 5, 150 ) / vmin;
+		const indices = this.Reveal.getIndices();
+
+		this.Reveal.transformSlides( {
+			overview: [
+				'scale('+ scale +')',
+				'translateX('+ ( -indices.h * this.overviewSlideWidth ) +'px)',
+				'translateY('+ ( -indices.v * this.overviewSlideHeight ) +'px)'
+			].join( ' ' )
+		} );
+
+	}
+
+	/**
+	 * Exits the slide overview and enters the currently
+	 * active slide.
+	 */
+	deactivate() {
+
+		// Only proceed if enabled in config
+		if( this.Reveal.getConfig().overview ) {
+
+			this.active = false;
+
+			this.Reveal.getRevealElement().classList.remove( 'overview' );
+
+			// Temporarily add a class so that transitions can do different things
+			// depending on whether they are exiting/entering overview, or just
+			// moving from slide to slide
+			this.Reveal.getRevealElement().classList.add( 'overview-deactivating' );
+
+			setTimeout( () => {
+				this.Reveal.getRevealElement().classList.remove( 'overview-deactivating' );
+			}, 1 );
+
+			// Move the background element back out
+			this.Reveal.getRevealElement().appendChild( this.Reveal.getBackgroundsElement() );
+
+			// Clean up changes made to slides
+			queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {
+				transformElement( slide, '' );
+
+				slide.removeEventListener( 'click', this.onSlideClicked, true );
+			} );
+
+			// Clean up changes made to backgrounds
+			queryAll( this.Reveal.getBackgroundsElement(), '.slide-background' ).forEach( background => {
+				transformElement( background, '' );
+			} );
+
+			this.Reveal.transformSlides( { overview: '' } );
+
+			const indices = this.Reveal.getIndices();
+
+			this.Reveal.slide( indices.h, indices.v );
+			this.Reveal.layout();
+			this.Reveal.cueAutoSlide();
+
+			// Notify observers of the overview hiding
+			this.Reveal.dispatchEvent({
+				type: 'overviewhidden',
+				data: {
+					'indexh': indices.h,
+					'indexv': indices.v,
+					'currentSlide': this.Reveal.getCurrentSlide()
+				}
+			});
+
+		}
+	}
+
+	/**
+	 * Toggles the slide overview mode on and off.
+	 *
+	 * @param {Boolean} [override] Flag which overrides the
+	 * toggle logic and forcibly sets the desired state. True means
+	 * overview is open, false means it's closed.
+	 */
+	toggle( override ) {
+
+		if( typeof override === 'boolean' ) {
+			override ? this.activate() : this.deactivate();
+		}
+		else {
+			this.isActive() ? this.deactivate() : this.activate();
+		}
+
+	}
+
+	/**
+	 * Checks if the overview is currently active.
+	 *
+	 * @return {Boolean} true if the overview is active,
+	 * false otherwise
+	 */
+	isActive() {
+
+		return this.active;
+
+	}
+
+	/**
+	 * Invoked when a slide is and we're in the overview.
+	 *
+	 * @param {object} event
+	 */
+	onSlideClicked( event ) {
+
+		if( this.isActive() ) {
+			event.preventDefault();
+
+			let element = event.target;
+
+			while( element && !element.nodeName.match( /section/gi ) ) {
+				element = element.parentNode;
+			}
+
+			if( element && !element.classList.contains( 'disabled' ) ) {
+
+				this.deactivate();
+
+				if( element.nodeName.match( /section/gi ) ) {
+					let h = parseInt( element.getAttribute( 'data-index-h' ), 10 ),
+						v = parseInt( element.getAttribute( 'data-index-v' ), 10 );
+
+					this.Reveal.slide( h, v );
+				}
+
+			}
+		}
+
+	}
+
+}

js/controllers/plugins.js

@@ -0,0 +1,241 @@
+import { loadScript } from '../utils/loader.js'
+
+/**
+ * Manages loading and registering of reveal.js plugins.
+ */
+export default class Plugins {
+
+	constructor( reveal ) {
+
+		this.Reveal = reveal;
+
+		// Flags our current state (idle -> loading -> loaded)
+		this.state = 'idle';
+
+		// An id:instance map of currently registed plugins
+		this.registeredPlugins = {};
+
+		this.asyncDependencies = [];
+
+	}
+
+	/**
+	 * Loads reveal.js dependencies, registers and
+	 * initializes plugins.
+	 *
+	 * Plugins are direct references to a reveal.js plugin
+	 * object that we register and initialize after any
+	 * synchronous dependencies have loaded.
+	 *
+	 * Dependencies are defined via the 'dependencies' config
+	 * option and will be loaded prior to starting reveal.js.
+	 * Some dependencies may have an 'async' flag, if so they
+	 * will load after reveal.js has been started up.
+	 */
+	load( plugins, dependencies ) {
+
+		this.state = 'loading';
+
+		plugins.forEach( this.registerPlugin.bind( this ) );
+
+		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;
+
+				const scriptLoadedCallback = (s) => {
+					if( s && typeof s.callback === 'function' ) s.callback();
+
+					if( --scriptsToLoad === 0 ) {
+						this.initPlugins().then( resolve );
+					}
+				};
+
+				// Load synchronous scripts
+				scripts.forEach( s => {
+					if( typeof s.id === 'string' ) {
+						this.registerPlugin( s );
+						scriptLoadedCallback( s );
+					}
+					else if( typeof s.src === 'string' ) {
+						loadScript( s.src, () => scriptLoadedCallback(s) );
+					}
+					else {
+						console.warn( 'Unrecognized plugin format', s );
+						scriptLoadedCallback();
+					}
+				} );
+			}
+			else {
+				this.initPlugins().then( resolve );
+			}
+
+		} );
+
+	}
+
+	/**
+	 * Initializes our plugins and waits for them to be ready
+	 * before proceeding.
+	 */
+	initPlugins() {
+
+		return new Promise( resolve => {
+
+			let pluginValues = Object.values( this.registeredPlugins );
+			let pluginsToInitialize = pluginValues.length;
+
+			// If there are no plugins, skip this step
+			if( pluginsToInitialize === 0 ) {
+				this.loadAsync().then( resolve );
+			}
+			// ... otherwise initialize plugins
+			else {
+
+				let initNextPlugin;
+
+				let afterPlugInitialized = () => {
+					if( --pluginsToInitialize === 0 ) {
+						this.loadAsync().then( resolve );
+					}
+					else {
+						initNextPlugin();
+					}
+				};
+
+				let i = 0;
+
+				// Initialize plugins serially
+				initNextPlugin = () => {
+
+					let plugin = pluginValues[i++];
+
+					// If the plugin has an 'init' method, invoke it
+					if( typeof plugin.init === 'function' ) {
+						let promise = plugin.init( this.Reveal );
+
+						// If the plugin returned a Promise, wait for it
+						if( promise && typeof promise.then === 'function' ) {
+							promise.then( afterPlugInitialized );
+						}
+						else {
+							afterPlugInitialized();
+						}
+					}
+					else {
+						afterPlugInitialized();
+					}
+
+				}
+
+				initNextPlugin();
+
+			}
+
+		} )
+
+	}
+
+	/**
+	 * 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( plugin ) {
+
+		// Backwards compatibility to make reveal.js ~3.9.0
+		// plugins work with reveal.js 4.0.0
+		if( arguments.length === 2 && typeof arguments[0] === 'string' ) {
+			plugin = arguments[1];
+			plugin.id = arguments[0];
+		}
+		// Plugin can optionally be a function which we call
+		// to create an instance of the plugin
+		else if( typeof plugin === 'function' ) {
+			plugin = plugin();
+		}
+
+		let id = plugin.id;
+
+		if( typeof id !== 'string' ) {
+			console.warn( 'Unrecognized plugin format; can\'t find plugin.id', plugin );
+		}
+		else 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( this.Reveal );
+			}
+		}
+		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;
+
+	}
+
+}

js/controllers/pointer.js

@@ -0,0 +1,118 @@
+/**
+ * Handles hiding of the pointer/cursor when inactive.
+ */
+export default class Pointer {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+		// Throttles mouse wheel navigation
+		this.lastMouseWheelStep = 0;
+
+		// Is the mouse pointer currently hidden from view
+		this.cursorHidden = false;
+
+		// Timeout used to determine when the cursor is inactive
+		this.cursorInactiveTimeout = 0;
+
+		this.onDocumentCursorActive = this.onDocumentCursorActive.bind( this );
+		this.onDocumentMouseScroll = this.onDocumentMouseScroll.bind( this );
+
+	}
+
+	/**
+	 * Called when the reveal.js config is updated.
+	 */
+	configure( config, oldConfig ) {
+
+		if( config.mouseWheel ) {
+			document.addEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false ); // FF
+			document.addEventListener( 'mousewheel', this.onDocumentMouseScroll, false );
+		}
+		else {
+			document.removeEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false ); // FF
+			document.removeEventListener( 'mousewheel', this.onDocumentMouseScroll, false );
+		}
+
+		// Auto-hide the mouse pointer when its inactive
+		if( config.hideInactiveCursor ) {
+			document.addEventListener( 'mousemove', this.onDocumentCursorActive, false );
+			document.addEventListener( 'mousedown', this.onDocumentCursorActive, false );
+		}
+		else {
+			this.showCursor();
+
+			document.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );
+			document.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );
+		}
+
+	}
+
+	/**
+	 * Shows the mouse pointer after it has been hidden with
+	 * #hideCursor.
+	 */
+	showCursor() {
+
+		if( this.cursorHidden ) {
+			this.cursorHidden = false;
+			this.Reveal.getRevealElement().style.cursor = '';
+		}
+
+	}
+
+	/**
+	 * Hides the mouse pointer when it's on top of the .reveal
+	 * container.
+	 */
+	hideCursor() {
+
+		if( this.cursorHidden === false ) {
+			this.cursorHidden = true;
+			this.Reveal.getRevealElement().style.cursor = 'none';
+		}
+
+	}
+
+	/**
+	 * Called whenever there is mouse input at the document level
+	 * to determine if the cursor is active or not.
+	 *
+	 * @param {object} event
+	 */
+	onDocumentCursorActive( event ) {
+
+		this.showCursor();
+
+		clearTimeout( this.cursorInactiveTimeout );
+
+		this.cursorInactiveTimeout = setTimeout( this.hideCursor.bind( this ), this.Reveal.getConfig().hideCursorTime );
+
+	}
+
+	/**
+	 * Handles mouse wheel scrolling, throttled to avoid skipping
+	 * multiple slides.
+	 *
+	 * @param {object} event
+	 */
+	onDocumentMouseScroll( event ) {
+
+		if( Date.now() - this.lastMouseWheelStep > 1000 ) {
+
+			this.lastMouseWheelStep = Date.now();
+
+			let delta = event.detail || -event.wheelDelta;
+			if( delta > 0 ) {
+				this.Reveal.next();
+			}
+			else if( delta < 0 ) {
+				this.Reveal.prev();
+			}
+
+		}
+
+	}
+
+}

js/controllers/print.js

@@ -0,0 +1,195 @@
+import { SLIDES_SELECTOR } from '../utils/constants.js'
+import { queryAll, createStyleSheet } from '../utils/util.js'
+
+/**
+ * Setups up our presentation for printing/exporting to PDF.
+ */
+export default class Print {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+	}
+
+	/**
+	 * Configures the presentation for printing to a static
+	 * PDF.
+	 */
+	setupPDF() {
+
+		let config = this.Reveal.getConfig();
+
+		let slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );
+
+		// Dimensions of the PDF pages
+		let pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),
+			pageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );
+
+		// Dimensions of slides within the pages
+		let slideWidth = slideSize.width,
+			slideHeight = slideSize.height;
+
+		// Let the browser know what page size we want to print
+		createStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );
+
+		// Limit the size of certain elements to the dimensions of the slide
+		createStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );
+
+		document.documentElement.classList.add( 'print-pdf' );
+		document.body.style.width = pageWidth + 'px';
+		document.body.style.height = pageHeight + 'px';
+
+		// Make sure stretch elements fit on slide
+		this.Reveal.layoutSlideContents( slideWidth, slideHeight );
+
+		// Compute slide numbers now, before we start duplicating slides
+		let doingSlideNumbers = config.slideNumber && /all|print/i.test( config.showSlideNumber );
+		queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( function( slide ) {
+			slide.setAttribute( 'data-slide-number', this.Reveal.slideNumber.getSlideNumber( slide ) );
+		}, this );
+
+		// Slide and slide background layout
+		queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( function( slide ) {
+
+			// Vertical stacks are not centred since their section
+			// children will be
+			if( slide.classList.contains( 'stack' ) === false ) {
+				// Center the slide inside of the page, giving the slide some margin
+				let left = ( pageWidth - slideWidth ) / 2,
+					top = ( pageHeight - slideHeight ) / 2;
+
+				let contentHeight = slide.scrollHeight;
+				let numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );
+
+				// Adhere to configured pages per slide limit
+				numberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );
+
+				// Center slides vertically
+				if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {
+					top = Math.max( ( pageHeight - contentHeight ) / 2, 0 );
+				}
+
+				// Wrap the slide in a page element and hide its overflow
+				// so that no page ever flows onto another
+				let page = document.createElement( 'div' );
+				page.className = 'pdf-page';
+				page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';
+				slide.parentNode.insertBefore( page, slide );
+				page.appendChild( slide );
+
+				// Position the slide inside of the page
+				slide.style.left = left + 'px';
+				slide.style.top = top + 'px';
+				slide.style.width = slideWidth + 'px';
+
+				if( slide.slideBackgroundElement ) {
+					page.insertBefore( slide.slideBackgroundElement, slide );
+				}
+
+				// Inject notes if `showNotes` is enabled
+				if( config.showNotes ) {
+
+					// Are there notes for this slide?
+					let notes = this.Reveal.getSlideNotes( slide );
+					if( notes ) {
+
+						let notesSpacing = 8;
+						let notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
+						let notesElement = document.createElement( 'div' );
+						notesElement.classList.add( 'speaker-notes' );
+						notesElement.classList.add( 'speaker-notes-pdf' );
+						notesElement.setAttribute( 'data-layout', notesLayout );
+						notesElement.innerHTML = notes;
+
+						if( notesLayout === 'separate-page' ) {
+							page.parentNode.insertBefore( notesElement, page.nextSibling );
+						}
+						else {
+							notesElement.style.left = notesSpacing + 'px';
+							notesElement.style.bottom = notesSpacing + 'px';
+							notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';
+							page.appendChild( notesElement );
+						}
+
+					}
+
+				}
+
+				// Inject slide numbers if `slideNumbers` are enabled
+				if( doingSlideNumbers ) {
+					let numberElement = document.createElement( 'div' );
+					numberElement.classList.add( 'slide-number' );
+					numberElement.classList.add( 'slide-number-pdf' );
+					numberElement.innerHTML = slide.getAttribute( 'data-slide-number' );
+					page.appendChild( numberElement );
+				}
+
+				// Copy page and show fragments one after another
+				if( config.pdfSeparateFragments ) {
+
+					// Each fragment 'group' is an array containing one or more
+					// fragments. Multiple fragments that appear at the same time
+					// are part of the same group.
+					let fragmentGroups = this.Reveal.fragments.sort( page.querySelectorAll( '.fragment' ), true );
+
+					let previousFragmentStep;
+					let previousPage;
+
+					fragmentGroups.forEach( function( fragments ) {
+
+						// Remove 'current-fragment' from the previous group
+						if( previousFragmentStep ) {
+							previousFragmentStep.forEach( function( fragment ) {
+								fragment.classList.remove( 'current-fragment' );
+							} );
+						}
+
+						// Show the fragments for the current index
+						fragments.forEach( function( fragment ) {
+							fragment.classList.add( 'visible', 'current-fragment' );
+						}, this );
+
+						// Create a separate page for the current fragment state
+						let clonedPage = page.cloneNode( true );
+						page.parentNode.insertBefore( clonedPage, ( previousPage || page ).nextSibling );
+
+						previousFragmentStep = fragments;
+						previousPage = clonedPage;
+
+					}, this );
+
+					// Reset the first/original page so that all fragments are hidden
+					fragmentGroups.forEach( function( fragments ) {
+						fragments.forEach( function( fragment ) {
+							fragment.classList.remove( 'visible', 'current-fragment' );
+						} );
+					} );
+
+				}
+				// Show all fragments
+				else {
+					queryAll( page, '.fragment:not(.fade-out)' ).forEach( function( fragment ) {
+						fragment.classList.add( 'visible' );
+					} );
+				}
+
+			}
+
+		}, this );
+
+		// Notify subscribers that the PDF layout is good to go
+		this.Reveal.dispatchEvent({ type: 'pdf-ready' });
+
+	}
+
+	/**
+	 * Checks if this instance is being used to print a PDF.
+	 */
+	isPrintingPDF() {
+
+		return ( /print-pdf/gi ).test( window.location.search );
+
+	}
+
+}

js/controllers/progress.js

@@ -0,0 +1,103 @@
+/**
+ * Creates a visual progress bar for the presentation.
+ */
+export default class Progress {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+		this.onProgressClicked = this.onProgressClicked.bind( this );
+
+	}
+
+	render() {
+
+		this.element = document.createElement( 'div' );
+		this.element.className = 'progress';
+		this.Reveal.getRevealElement().appendChild( this.element );
+
+		this.bar = document.createElement( 'span' );
+		this.element.appendChild( this.bar );
+
+	}
+
+	/**
+	 * Called when the reveal.js config is updated.
+	 */
+	configure( config, oldConfig ) {
+
+		this.element.style.display = config.progress ? 'block' : 'none';
+
+	}
+
+	bind() {
+
+		if( this.Reveal.getConfig().progress && this.element ) {
+			this.element.addEventListener( 'click', this.onProgressClicked, false );
+		}
+
+	}
+
+	unbind() {
+
+		if ( this.Reveal.getConfig().progress && this.element ) {
+			this.element.removeEventListener( 'click', this.onProgressClicked, false );
+		}
+
+	}
+
+	/**
+	 * Updates the progress bar to reflect the current slide.
+	 */
+	update() {
+
+		// Update progress if enabled
+		if( this.Reveal.getConfig().progress && this.bar ) {
+
+			let scale = this.Reveal.getProgress();
+
+			// Don't fill the progress bar if there's only one slide
+			if( this.Reveal.getTotalSlides() < 2 ) {
+				scale = 0;
+			}
+
+			this.bar.style.transform = 'scaleX('+ scale +')';
+
+		}
+
+	}
+
+	getMaxWidth() {
+
+		return this.Reveal.getRevealElement().offsetWidth;
+
+	}
+
+	/**
+	 * Clicking on the progress bar results in a navigation to the
+	 * closest approximate horizontal slide using this equation:
+	 *
+	 * ( clickX / presentationWidth ) * numberOfSlides
+	 *
+	 * @param {object} event
+	 */
+	onProgressClicked( event ) {
+
+		this.Reveal.onUserInput( event );
+
+		event.preventDefault();
+
+		let slidesTotal = this.Reveal.getHorizontalSlides().length;
+		let slideIndex = Math.floor( ( event.clientX / this.getMaxWidth() ) * slidesTotal );
+
+		if( this.Reveal.getConfig().rtl ) {
+			slideIndex = slidesTotal - slideIndex;
+		}
+
+		this.Reveal.slide( slideIndex );
+
+	}
+
+
+}

js/controllers/slidecontent.js

@@ -0,0 +1,456 @@
+import { HORIZONTAL_SLIDES_SELECTOR, VERTICAL_SLIDES_SELECTOR } from '../utils/constants.js'
+import { extend, queryAll, closest } from '../utils/util.js'
+import { isMobile } from '../utils/device.js'
+
+import fitty from 'fitty';
+
+/**
+ * Handles loading, unloading and playback of slide
+ * content such as images, videos and iframes.
+ */
+export default class SlideContent {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+		this.startEmbeddedIframe = this.startEmbeddedIframe.bind( this );
+
+	}
+
+	/**
+	 * Should the given element be preloaded?
+	 * Decides based on local element attributes and global config.
+	 *
+	 * @param {HTMLElement} element
+	 */
+	shouldPreload( element ) {
+
+		// Prefer an explicit global preload setting
+		let preload = this.Reveal.getConfig().preloadIframes;
+
+		// If no global setting is available, fall back on the element's
+		// own preload setting
+		if( typeof preload !== 'boolean' ) {
+			preload = element.hasAttribute( 'data-preload' );
+		}
+
+		return preload;
+	}
+
+	/**
+	 * Called when the given slide is within the configured view
+	 * distance. Shows the slide element and loads any content
+	 * that is set to load lazily (data-src).
+	 *
+	 * @param {HTMLElement} slide Slide to show
+	 */
+	load( slide, options = {} ) {
+
+		// Show the slide element
+		slide.style.display = this.Reveal.getConfig().display;
+
+		// Media elements with data-src attributes
+		queryAll( slide, 'img[data-src], video[data-src], audio[data-src], iframe[data-src]' ).forEach( element => {
+			if( element.tagName !== 'IFRAME' || this.shouldPreload( element ) ) {
+				element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
+				element.setAttribute( 'data-lazy-loaded', '' );
+				element.removeAttribute( 'data-src' );
+			}
+		} );
+
+		// Media elements with <source> children
+		queryAll( slide, 'video, audio' ).forEach( media => {
+			let sources = 0;
+
+			queryAll( media, 'source[data-src]' ).forEach( source => {
+				source.setAttribute( 'src', source.getAttribute( 'data-src' ) );
+				source.removeAttribute( 'data-src' );
+				source.setAttribute( 'data-lazy-loaded', '' );
+				sources += 1;
+			} );
+
+			// Enable inline video playback in mobile Safari
+			if( isMobile && media.tagName === 'VIDEO' ) {
+				media.setAttribute( 'playsinline', '' );
+			}
+
+			// If we rewrote sources for this video/audio element, we need
+			// to manually tell it to load from its new origin
+			if( sources > 0 ) {
+				media.load();
+			}
+		} );
+
+
+		// Show the corresponding background element
+		let background = slide.slideBackgroundElement;
+		if( background ) {
+			background.style.display = 'block';
+
+			let backgroundContent = slide.slideBackgroundContentElement;
+			let backgroundIframe = slide.getAttribute( 'data-background-iframe' );
+
+			// If the background contains media, load it
+			if( background.hasAttribute( 'data-loaded' ) === false ) {
+				background.setAttribute( 'data-loaded', 'true' );
+
+				let backgroundImage = slide.getAttribute( 'data-background-image' ),
+					backgroundVideo = slide.getAttribute( 'data-background-video' ),
+					backgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ),
+					backgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' );
+
+				// Images
+				if( backgroundImage ) {
+					backgroundContent.style.backgroundImage = 'url('+ encodeURI( backgroundImage ) +')';
+				}
+				// Videos
+				else if ( backgroundVideo && !this.Reveal.isSpeakerNotes() ) {
+					let video = document.createElement( 'video' );
+
+					if( backgroundVideoLoop ) {
+						video.setAttribute( 'loop', '' );
+					}
+
+					if( backgroundVideoMuted ) {
+						video.muted = true;
+					}
+
+					// Enable inline playback in mobile Safari
+					//
+					// Mute is required for video to play when using
+					// swipe gestures to navigate since they don't
+					// count as direct user actions :'(
+					if( isMobile ) {
+						video.muted = true;
+						video.setAttribute( 'playsinline', '' );
+					}
+
+					// Support comma separated lists of video sources
+					backgroundVideo.split( ',' ).forEach( source => {
+						video.innerHTML += '<source src="'+ source +'">';
+					} );
+
+					backgroundContent.appendChild( video );
+				}
+				// Iframes
+				else if( backgroundIframe && options.excludeIframes !== true ) {
+					let iframe = document.createElement( 'iframe' );
+					iframe.setAttribute( 'allowfullscreen', '' );
+					iframe.setAttribute( 'mozallowfullscreen', '' );
+					iframe.setAttribute( 'webkitallowfullscreen', '' );
+					iframe.setAttribute( 'allow', 'autoplay' );
+
+					iframe.setAttribute( 'data-src', backgroundIframe );
+
+					iframe.style.width  = '100%';
+					iframe.style.height = '100%';
+					iframe.style.maxHeight = '100%';
+					iframe.style.maxWidth = '100%';
+
+					backgroundContent.appendChild( iframe );
+				}
+			}
+
+			// Start loading preloadable iframes
+			let backgroundIframeElement = backgroundContent.querySelector( 'iframe[data-src]' );
+			if( backgroundIframeElement ) {
+
+				// Check if this iframe is eligible to be preloaded
+				if( this.shouldPreload( background ) && !/autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) {
+					if( backgroundIframeElement.getAttribute( 'src' ) !== backgroundIframe ) {
+						backgroundIframeElement.setAttribute( 'src', backgroundIframe );
+					}
+				}
+
+			}
+
+		}
+
+		// Autosize text with the r-fit-text class based on the
+		// size of its container. This needs to happen after the
+		// slide is visible in order to measure the text.
+		Array.from( slide.querySelectorAll( '.r-fit-text:not([data-fitted])' ) ).forEach( element => {
+			element.dataset.fitted = '';
+			fitty( element, {
+				minSize: 24,
+				maxSize: this.Reveal.getConfig().height * 0.8,
+				observeMutations: false,
+				observeWindow: false
+			} );
+		} );
+
+	}
+
+	/**
+	 * Unloads and hides the given slide. This is called when the
+	 * slide is moved outside of the configured view distance.
+	 *
+	 * @param {HTMLElement} slide
+	 */
+	unload( slide ) {
+
+		// Hide the slide element
+		slide.style.display = 'none';
+
+		// Hide the corresponding background element
+		let background = this.Reveal.getSlideBackground( slide );
+		if( background ) {
+			background.style.display = 'none';
+
+			// Unload any background iframes
+			queryAll( background, 'iframe[src]' ).forEach( element => {
+				element.removeAttribute( 'src' );
+			} );
+		}
+
+		// Reset lazy-loaded media elements with src attributes
+		queryAll( slide, 'video[data-lazy-loaded][src], audio[data-lazy-loaded][src], iframe[data-lazy-loaded][src]' ).forEach( element => {
+			element.setAttribute( 'data-src', element.getAttribute( 'src' ) );
+			element.removeAttribute( 'src' );
+		} );
+
+		// Reset lazy-loaded media elements with <source> children
+		queryAll( slide, 'video[data-lazy-loaded] source[src], audio source[src]' ).forEach( source => {
+			source.setAttribute( 'data-src', source.getAttribute( 'src' ) );
+			source.removeAttribute( 'src' );
+		} );
+
+	}
+
+	/**
+	 * Enforces origin-specific format rules for embedded media.
+	 */
+	formatEmbeddedContent() {
+
+		let _appendParamToIframeSource = ( sourceAttribute, sourceURL, param ) => {
+			queryAll( this.Reveal.getSlidesElement(), 'iframe['+ sourceAttribute +'*="'+ sourceURL +'"]' ).forEach( el => {
+				let src = el.getAttribute( sourceAttribute );
+				if( src && src.indexOf( param ) === -1 ) {
+					el.setAttribute( sourceAttribute, src + ( !/\?/.test( src ) ? '?' : '&' ) + param );
+				}
+			});
+		};
+
+		// YouTube frames must include "?enablejsapi=1"
+		_appendParamToIframeSource( 'src', 'youtube.com/embed/', 'enablejsapi=1' );
+		_appendParamToIframeSource( 'data-src', 'youtube.com/embed/', 'enablejsapi=1' );
+
+		// Vimeo frames must include "?api=1"
+		_appendParamToIframeSource( 'src', 'player.vimeo.com/', 'api=1' );
+		_appendParamToIframeSource( 'data-src', 'player.vimeo.com/', 'api=1' );
+
+	}
+
+	/**
+	 * Start playback of any embedded content inside of
+	 * the given element.
+	 *
+	 * @param {HTMLElement} element
+	 */
+	startEmbeddedContent( element ) {
+
+		if( element && !this.Reveal.isSpeakerNotes() ) {
+
+			// Restart GIFs
+			queryAll( element, 'img[src$=".gif"]' ).forEach( el => {
+				// Setting the same unchanged source like this was confirmed
+				// to work in Chrome, FF & Safari
+				el.setAttribute( 'src', el.getAttribute( 'src' ) );
+			} );
+
+			// HTML5 media elements
+			queryAll( element, 'video, audio' ).forEach( el => {
+				if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
+					return;
+				}
+
+				// Prefer an explicit global autoplay setting
+				let autoplay = this.Reveal.getConfig().autoPlayMedia;
+
+				// If no global setting is available, fall back on the element's
+				// own autoplay setting
+				if( typeof autoplay !== 'boolean' ) {
+					autoplay = el.hasAttribute( 'data-autoplay' ) || !!closest( el, '.slide-background' );
+				}
+
+				if( autoplay && typeof el.play === 'function' ) {
+
+					// If the media is ready, start playback
+					if( el.readyState > 1 ) {
+						this.startEmbeddedMedia( { target: el } );
+					}
+					// Mobile devices never fire a loaded event so instead
+					// of waiting, we initiate playback
+					else if( isMobile ) {
+						let promise = el.play();
+
+						// If autoplay does not work, ensure that the controls are visible so
+						// that the viewer can start the media on their own
+						if( promise && typeof promise.catch === 'function' && el.controls === false ) {
+							promise.catch( () => {
+								el.controls = true;
+
+								// Once the video does start playing, hide the controls again
+								el.addEventListener( 'play', () => {
+									el.controls = false;
+								} );
+							} );
+						}
+					}
+					// If the media isn't loaded, wait before playing
+					else {
+						el.removeEventListener( 'loadeddata', this.startEmbeddedMedia ); // remove first to avoid dupes
+						el.addEventListener( 'loadeddata', this.startEmbeddedMedia );
+					}
+
+				}
+			} );
+
+			// Normal iframes
+			queryAll( element, 'iframe[src]' ).forEach( el => {
+				if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
+					return;
+				}
+
+				this.startEmbeddedIframe( { target: el } );
+			} );
+
+			// Lazy loading iframes
+			queryAll( element, 'iframe[data-src]' ).forEach( el => {
+				if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
+					return;
+				}
+
+				if( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {
+					el.removeEventListener( 'load', this.startEmbeddedIframe ); // remove first to avoid dupes
+					el.addEventListener( 'load', this.startEmbeddedIframe );
+					el.setAttribute( 'src', el.getAttribute( 'data-src' ) );
+				}
+			} );
+
+		}
+
+	}
+
+	/**
+	 * Starts playing an embedded video/audio element after
+	 * it has finished loading.
+	 *
+	 * @param {object} event
+	 */
+	startEmbeddedMedia( event ) {
+
+		let isAttachedToDOM = !!closest( event.target, 'html' ),
+			isVisible  		= !!closest( event.target, '.present' );
+
+		if( isAttachedToDOM && isVisible ) {
+			event.target.currentTime = 0;
+			event.target.play();
+		}
+
+		event.target.removeEventListener( 'loadeddata', this.startEmbeddedMedia );
+
+	}
+
+	/**
+	 * "Starts" the content of an embedded iframe using the
+	 * postMessage API.
+	 *
+	 * @param {object} event
+	 */
+	startEmbeddedIframe( event ) {
+
+		let iframe = event.target;
+
+		if( iframe && iframe.contentWindow ) {
+
+			let isAttachedToDOM = !!closest( event.target, 'html' ),
+				isVisible  		= !!closest( event.target, '.present' );
+
+			if( isAttachedToDOM && isVisible ) {
+
+				// Prefer an explicit global autoplay setting
+				let autoplay = this.Reveal.getConfig().autoPlayMedia;
+
+				// If no global setting is available, fall back on the element's
+				// own autoplay setting
+				if( typeof autoplay !== 'boolean' ) {
+					autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closest( iframe, '.slide-background' );
+				}
+
+				// YouTube postMessage API
+				if( /youtube\.com\/embed\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
+					iframe.contentWindow.postMessage( '{"event":"command","func":"playVideo","args":""}', '*' );
+				}
+				// Vimeo postMessage API
+				else if( /player\.vimeo\.com\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {
+					iframe.contentWindow.postMessage( '{"method":"play"}', '*' );
+				}
+				// Generic postMessage API
+				else {
+					iframe.contentWindow.postMessage( 'slide:start', '*' );
+				}
+
+			}
+
+		}
+
+	}
+
+	/**
+	 * Stop playback of any embedded content inside of
+	 * the targeted slide.
+	 *
+	 * @param {HTMLElement} element
+	 */
+	stopEmbeddedContent( element, options = {} ) {
+
+		options = extend( {
+			// Defaults
+			unloadIframes: true
+		}, options );
+
+		if( element && element.parentNode ) {
+			// HTML5 media elements
+			queryAll( element, 'video, audio' ).forEach( el => {
+				if( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {
+					el.setAttribute('data-paused-by-reveal', '');
+					el.pause();
+				}
+			} );
+
+			// Generic postMessage API for non-lazy loaded iframes
+			queryAll( element, 'iframe' ).forEach( el => {
+				if( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );
+				el.removeEventListener( 'load', this.startEmbeddedIframe );
+			});
+
+			// YouTube postMessage API
+			queryAll( element, 'iframe[src*="youtube.com/embed/"]' ).forEach( el => {
+				if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
+					el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' );
+				}
+			});
+
+			// Vimeo postMessage API
+			queryAll( element, 'iframe[src*="player.vimeo.com/"]' ).forEach( el => {
+				if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
+					el.contentWindow.postMessage( '{"method":"pause"}', '*' );
+				}
+			});
+
+			if( options.unloadIframes === true ) {
+				// Unload lazy-loaded iframes
+				queryAll( element, 'iframe[data-src]' ).forEach( el => {
+					// Only removing the src doesn't actually unload the frame
+					// in all browsers (Firefox) so we set it to blank first
+					el.setAttribute( 'src', 'about:blank' );
+					el.removeAttribute( 'src' );
+				} );
+			}
+		}
+
+	}
+
+}

js/controllers/slidenumber.js

@@ -0,0 +1,126 @@
+/**
+ * Handles the display of reveal.js' optional slide number.
+ */
+export default class SlideNumber {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+	}
+
+	render() {
+
+		this.element = document.createElement( 'div' );
+		this.element.className = 'slide-number';
+		this.Reveal.getRevealElement().appendChild( this.element );
+
+	}
+
+	/**
+	 * Called when the reveal.js config is updated.
+	 */
+	configure( config, oldConfig ) {
+
+		let slideNumberDisplay = 'none';
+		if( config.slideNumber && !this.Reveal.isPrintingPDF() ) {
+			if( config.showSlideNumber === 'all' ) {
+				slideNumberDisplay = 'block';
+			}
+			else if( config.showSlideNumber === 'speaker' && this.Reveal.isSpeakerNotes() ) {
+				slideNumberDisplay = 'block';
+			}
+		}
+
+		this.element.style.display = slideNumberDisplay;
+
+	}
+
+	/**
+	 * Updates the slide number to match the current slide.
+	 */
+	update() {
+
+		// Update slide number if enabled
+		if( this.Reveal.getConfig().slideNumber && this.element ) {
+			this.element.innerHTML = this.getSlideNumber();
+		}
+
+	}
+
+	/**
+	 * Returns the HTML string corresponding to the current slide
+	 * number, including formatting.
+	 */
+	getSlideNumber( slide = this.Reveal.getCurrentSlide() ) {
+
+		let config = this.Reveal.getConfig();
+		let value;
+		let format = 'h.v';
+
+		if ( typeof config.slideNumber === 'function' ) {
+			value = config.slideNumber( slide );
+		} else {
+			// Check if a custom number format is available
+			if( typeof config.slideNumber === 'string' ) {
+				format = config.slideNumber;
+			}
+
+			// If there are ONLY vertical slides in this deck, always use
+			// a flattened slide number
+			if( !/c/.test( format ) && this.Reveal.getHorizontalSlides().length === 1 ) {
+				format = 'c';
+			}
+
+			// Offset the current slide number by 1 to make it 1-indexed
+			let horizontalOffset = slide && slide.dataset.visibility === 'uncounted' ? 0 : 1;
+
+			value = [];
+			switch( format ) {
+				case 'c':
+					value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset );
+					break;
+				case 'c/t':
+					value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset, '/', this.Reveal.getTotalSlides() );
+					break;
+				default:
+					let indices = this.Reveal.getIndices( slide );
+					value.push( indices.h + horizontalOffset );
+					let sep = format === 'h/v' ? '/' : '.';
+					if( this.Reveal.isVerticalSlide( slide ) ) value.push( sep, indices.v + 1 );
+			}
+		}
+
+		let url = '#' + this.Reveal.location.getHash( slide );
+		return this.formatNumber( value[0], value[1], value[2], url );
+
+	}
+
+	/**
+	 * Applies HTML formatting to a slide number before it's
+	 * written to the DOM.
+	 *
+	 * @param {number} a Current slide
+	 * @param {string} delimiter Character to separate slide numbers
+	 * @param {(number|*)} b Total slides
+	 * @param {HTMLElement} [url='#'+locationHash()] The url to link to
+	 * @return {string} HTML string fragment
+	 */
+	formatNumber( a, delimiter, b, url = '#' + this.Reveal.location.getHash() ) {
+
+		if( typeof b === 'number' && !isNaN( b ) ) {
+			return  `<a href="${url}">
+					<span class="slide-number-a">${a}</span>
+					<span class="slide-number-delimiter">${delimiter}</span>
+					<span class="slide-number-b">${b}</span>
+					</a>`;
+		}
+		else {
+			return `<a href="${url}">
+					<span class="slide-number-a">${a}</span>
+					</a>`;
+		}
+
+	}
+
+}