4.6.0

fix dracula li markers

.github/CONTRIBUTING.md

@@ -1,10 +1,9 @@
 ## Contributing
-
-Please keep the [issue tracker](http://github.com/hakimel/reveal.js/issues) limited to **bug reports**, **feature requests** and **pull requests**.
+Please keep the [issue tracker](https://github.com/hakimel/reveal.js/issues) limited to **bug reports**.
 
 
-### Personal Support
-If you have personal support or setup questions the best place to ask those are [StackOverflow](http://stackoverflow.com/questions/tagged/reveal.js).
+### General Questions and Support
+If you have questions about how to use reveal.js the best place to ask is in the [Discussions](https://github.com/hakimel/reveal.js/discussions). Anything that isn't a bug report should be posted as a dicussion instead.
 
 
 ### Bug Reports
@@ -12,11 +11,10 @@ When reporting a bug make sure to include information about which browser and op
 
 
 ### Pull Requests
+- Should be submitted from a feature/topic branch (not your master)
 - Should follow the coding style of the file you work in, most importantly:
   - Tabs to indent
   - Single-quoted strings
-- Should be made towards the **dev branch**
-- Should be submitted from a feature/topic branch (not your master)
 
 
 ### Plugins

.github/workflows/js.yml

@@ -2,6 +2,9 @@ name: tests
 
 on: [push]
 
+permissions:
+  contents: read
+
 jobs:
   build:
 
@@ -9,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [10.x, 13.x]
+        node-version: [14.x]
 
     steps:
     - uses: actions/checkout@v2

.gitignore

@@ -8,5 +8,4 @@ out/
 log/*.log
 tmp/**
 node_modules/
-.sass-cache
-dist/*.map
+.sass-cache

.npmignore

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

LICENSE

@@ -1,4 +1,4 @@
-Copyright (C) 2020 Hakim El Hattab, http://hakim.se, and reveal.js contributors
+Copyright (C) 2011-2023 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

README.md

@@ -1,23 +1,50 @@
 <p align="center">
-  <img src="https://hakim-static.s3.amazonaws.com/reveal-js/logo/v1/reveal-black-text.svg" alt="reveal.js" width="450">
+  <a href="https://revealjs.com">
+  <img src="https://hakim-static.s3.amazonaws.com/reveal-js/logo/v1/reveal-black-text-sticker.png" alt="reveal.js" width="500">
+  </a>
   <br><br>
-  <img src="https://github.com/hakimel/reveal.js/workflows/tests/badge.svg">
-  <img src="https://s3.amazonaws.com/static.slid.es/images/slides-github-banner-320x40.png?1" alt="Slides" width="160" height="20"></a>
+  <a href="https://github.com/hakimel/reveal.js/actions"><img src="https://github.com/hakimel/reveal.js/workflows/tests/badge.svg"></a>
+  <a href="https://slides.com/"><img src="https://s3.amazonaws.com/static.slid.es/images/slides-github-banner-320x40.png?1" alt="Slides" width="160" height="20"></a>
 </p>
 
-reveal.js is an open source HTML presentation framework. It enables anyone with a web browser to create fully featured and beautiful presentations for free. [Check out the live demo](https://revealjs.com/).
+reveal.js is an open source HTML presentation framework. It enables anyone with a web browser to create beautiful presentations for free. Check out the live demo at [revealjs.com](https://revealjs.com/).
 
-The framework comes with a broad range of features including [nested slides](https://revealjs.com/vertical-slides/), [Markdown support](https://revealjs.com/markdown/), [Auto-Animate](https://revealjs.com/auto-animate/), [PDF export](https://revealjs.com/pdf-export/), [speaker notes](https://revealjs.com/speaker-view/), [LaTeX support](https://revealjs.com/math/), [syntax highlighted code](https://revealjs.com/code/) and much more.
+The framework comes with a powerful feature set including [nested slides](https://revealjs.com/vertical-slides/), [Markdown support](https://revealjs.com/markdown/), [Auto-Animate](https://revealjs.com/auto-animate/), [PDF export](https://revealjs.com/pdf-export/), [speaker notes](https://revealjs.com/speaker-view/), [LaTeX typesetting](https://revealjs.com/math/), [syntax highlighted code](https://revealjs.com/code/) and an [extensive API](https://revealjs.com/api/).
 
-<h1>
-  <a href="https://revealjs.com/installation" style="font-size: 3em;">Get Started</a>
-</h1>
+---
 
-## Documentation
-The full reveal.js documentation is available at [revealjs.com](https://revealjs.com).
+Want to create reveal.js presentation in a graphical editor? Try <https://slides.com>. It's made by the same people behind reveal.js.
 
-## License
+---
 
-MIT licensed
+### Sponsors
+Hakim's open source work is supported by <a href="https://github.com/sponsors/hakimel">GitHub sponsors</a>. Special thanks to:
+<div align="center">
+  <table>
+    <td align="center">
+      <a href="https://workos.com/?utm_campaign=github_repo&utm_medium=referral&utm_content=revealjs&utm_source=github">
+        <div>
+          <img src="https://user-images.githubusercontent.com/629429/151508669-efb4c3b3-8fe3-45eb-8e47-e9510b5f0af1.svg" width="290" alt="WorkOS">
+        </div>
+        <b>Your app, enterprise-ready.</b>
+        <div>
+          <sub>Start selling to enterprise customers with just a few lines of code. Add Single Sign-On (and more) in minutes instead of months.</sup>
+        </div>
+      </a>
+    </td>
+  </table>
+</div>
 
-Copyright (C) 2011-2020 Hakim El Hattab, https://hakim.se
+---
+
+### Getting started
+- 🚀 [Install reveal.js](https://revealjs.com/installation)
+- 👀 [View the demo presentation](https://revealjs.com/demo)
+- 📖 [Read the documentation](https://revealjs.com/markup/)
+- 🖌 [Try the visual editor for reveal.js at Slides.com](https://slides.com/)
+- 🎬 [Watch the reveal.js video course (paid)](https://revealjs.com/course)
+
+--- 
+<div align="center">
+  MIT licensed | Copyright © 2011-2023 Hakim El Hattab, https://hakim.se
+</div>

css/layout.scss

@@ -16,6 +16,12 @@
 	box-sizing: border-box;
 }
 
+// Text that auto-fits its 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;
@@ -30,20 +36,34 @@
 .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;
-}
-
-.reveal .items-center {
 	align-items: center;
+	justify-content: center;
 }
 
-.reveal .justify-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.scss

@@ -1,42 +1,30 @@
-/* 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;
+		overflow: visible;
 		width: auto;
 		height: auto;
-		overflow: visible;
 
 		body {
-			background: #fff;
-			font-size: 20pt;
-			width: auto;
-			height: auto;
-			border: 0;
-			margin: 0 5%;
+			margin: 0;
 			padding: 0;
 			overflow: visible;
-			float: none !important;
 		}
+	}
+
+	html:not(.print-pdf) .reveal {
+		background: #fff;
+		font-size: 20pt;
 
-		.nestedarrow,
 		.controls,
-		.fork-reveal,
-		.share-reveal,
 		.state-background,
-		.reveal .progress,
-		.reveal .backgrounds,
-		.reveal .slide-number {
+		.progress,
+		.backgrounds,
+		.slide-number {
 			display: none !important;
 		}
 
-		body, p, td, li {
+		p, td, li {
 			font-size: 20pt!important;
 			color: #000;
 		}
@@ -49,7 +37,6 @@
 			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; }
@@ -74,18 +61,19 @@
 			margin: 0;
 			text-align: left !important;
 		}
-		.reveal pre,
-		.reveal table {
+		pre,
+		table {
 			margin-left: 0;
 			margin-right: 0;
 		}
-		.reveal pre code {
+		pre code {
 			padding: 20px;
 		}
-		.reveal blockquote {
+		blockquote {
 			margin: 20px 0;
 		}
-		.reveal .slides {
+
+		.slides {
 			position: static !important;
 			width: auto !important;
 			height: auto !important;
@@ -106,7 +94,7 @@
 
 			perspective-origin: 50% 50%;
 		}
-		.reveal .slides section {
+		.slides section {
 			visibility: visible !important;
 			position: static !important;
 			width: auto !important;
@@ -129,19 +117,24 @@
 			transform: none !important;
 			transition: none !important;
 		}
-		.reveal .slides section.stack {
+		.slides section.stack {
 			padding: 0 !important;
 		}
-		.reveal section:last-of-type {
+		.slides section:last-of-type {
 			page-break-after: avoid !important;
 		}
-		.reveal section .fragment {
+		.slides section .fragment {
 			opacity: 1 !important;
 			visibility: visible !important;
 
 			transform: none !important;
 		}
-		.reveal section img {
+
+		.r-fit-text {
+			white-space: normal !important;
+		}
+
+		section img {
 			display: block;
 			margin: 15px 0px;
 			background: rgba(255,255,255,1);
@@ -149,11 +142,11 @@
 			box-shadow: none;
 		}
 
-		.reveal section small {
+		section small {
 			font-size: 0.8em;
 		}
 
-		.reveal .hljs {
+		.hljs {
 			max-height: 100%;
 			white-space: pre-wrap;
 			word-wrap: break-word;
@@ -161,11 +154,11 @@
 			font-size: 15pt;
 		}
 
-		.reveal .hljs .hljs-ln-numbers {
+		.hljs .hljs-ln-numbers {
 			white-space: nowrap;
 		}
 
-		.reveal .hljs td {
+		.hljs td {
 			font-size: inherit !important;
 			color: inherit !important;
 		}

css/print/pdf.scss

@@ -2,7 +2,7 @@
  * This stylesheet is used to print reveal.js
  * presentations to PDF.
  *
- * https://revealjs.revealjs.com/pdf-export/
+ * https://revealjs.com/pdf-export/
  */
 
 html.print-pdf {
@@ -30,30 +30,14 @@ html.print-pdf {
 	.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;
@@ -115,12 +99,10 @@ html.print-pdf {
 		box-shadow: none;
 	}
 
-	.reveal .roll {
-		overflow: visible;
-		line-height: 1em;
-	}
-
 	/* Slide backgrounds are placed inside of their slide when exporting to PDF */
+	.reveal .backgrounds {
+		display: none;
+	}
 	.reveal .slide-background {
 		display: block !important;
 		position: absolute;

css/reveal.scss

@@ -1,3 +1,5 @@
+@use "sass:math";
+
 /**
  * reveal.js
  * http://revealjs.com
@@ -31,16 +33,29 @@ html.reveal-full-page {
 	color: #000;
 }
 
+// Force the presentation to cover the full viewport when we
+// enter fullscreen mode. Fixes sizing issues in Safari.
+.reveal-viewport:fullscreen {
+	top: 0 !important;
+	left: 0 !important;
+	width: 100% !important;
+	height: 100% !important;
+	transform: none !important;
+}
+
 
 /*********************************************
  * VIEW FRAGMENTS
  *********************************************/
 
-.reveal .slides section .fragment {
-	opacity: 0;
-	visibility: hidden;
+.reveal .fragment {
 	transition: all .2s ease;
-	will-change: opacity;
+
+	&:not(.custom) {
+		opacity: 0;
+		visibility: hidden;
+		will-change: opacity;
+	}
 
 	&.visible {
 		opacity: 1;
@@ -52,7 +67,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.grow {
+.reveal .fragment.grow {
 	opacity: 1;
 	visibility: inherit;
 
@@ -61,7 +76,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.shrink {
+.reveal .fragment.shrink {
 	opacity: 1;
 	visibility: inherit;
 
@@ -70,7 +85,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.zoom-in {
+.reveal .fragment.zoom-in {
 	transform: scale( 0.1 );
 
 	&.visible {
@@ -78,7 +93,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-out {
+.reveal .fragment.fade-out {
 	opacity: 1;
 	visibility: inherit;
 
@@ -88,7 +103,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.semi-fade-out {
+.reveal .fragment.semi-fade-out {
 	opacity: 1;
 	visibility: inherit;
 
@@ -98,7 +113,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.strike {
+.reveal .fragment.strike {
 	opacity: 1;
 	visibility: inherit;
 
@@ -107,7 +122,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-up {
+.reveal .fragment.fade-up {
 	transform: translate(0, 40px);
 
 	&.visible {
@@ -115,7 +130,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-down {
+.reveal .fragment.fade-down {
 	transform: translate(0, -40px);
 
 	&.visible {
@@ -123,7 +138,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-right {
+.reveal .fragment.fade-right {
 	transform: translate(-40px, 0);
 
 	&.visible {
@@ -131,7 +146,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-left {
+.reveal .fragment.fade-left {
 	transform: translate(40px, 0);
 
 	&.visible {
@@ -139,8 +154,8 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-in-then-out,
-.reveal .slides section .fragment.current-visible {
+.reveal .fragment.fade-in-then-out,
+.reveal .fragment.current-visible {
 	opacity: 0;
 	visibility: hidden;
 
@@ -150,7 +165,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-in-then-semi-out {
+.reveal .fragment.fade-in-then-semi-out {
 	opacity: 0;
 	visibility: hidden;
 
@@ -165,32 +180,32 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.highlight-red,
-.reveal .slides section .fragment.highlight-current-red,
-.reveal .slides section .fragment.highlight-green,
-.reveal .slides section .fragment.highlight-current-green,
-.reveal .slides section .fragment.highlight-blue,
-.reveal .slides section .fragment.highlight-current-blue {
+.reveal .fragment.highlight-red,
+.reveal .fragment.highlight-current-red,
+.reveal .fragment.highlight-green,
+.reveal .fragment.highlight-current-green,
+.reveal .fragment.highlight-blue,
+.reveal .fragment.highlight-current-blue {
 	opacity: 1;
 	visibility: inherit;
 }
-	.reveal .slides section .fragment.highlight-red.visible {
+	.reveal .fragment.highlight-red.visible {
 		color: #ff2c2d
 	}
-	.reveal .slides section .fragment.highlight-green.visible {
+	.reveal .fragment.highlight-green.visible {
 		color: #17ff2e;
 	}
-	.reveal .slides section .fragment.highlight-blue.visible {
+	.reveal .fragment.highlight-blue.visible {
 		color: #1b91ff;
 	}
 
-.reveal .slides section .fragment.highlight-current-red.current-fragment {
+.reveal .fragment.highlight-current-red.current-fragment {
 	color: #ff2c2d
 }
-.reveal .slides section .fragment.highlight-current-green.current-fragment {
+.reveal .fragment.highlight-current-green.current-fragment {
 	color: #17ff2e;
 }
-.reveal .slides section .fragment.highlight-current-blue.current-fragment {
+.reveal .fragment.highlight-current-blue.current-fragment {
 	color: #1b91ff;
 }
 
@@ -247,11 +262,11 @@ $controlsArrowAngleActive: 36deg;
 
 @mixin controlsArrowTransform( $angle ) {
 	&:before {
-		transform: translateX(($controlArrowSize - $controlArrowLength)/2) translateY(($controlArrowSize - $controlArrowThickness)/2) rotate( $angle );
+		transform: translateX(($controlArrowSize - $controlArrowLength)*0.5) translateY(($controlArrowSize - $controlArrowThickness)*0.5) rotate( $angle );
 	}
 
 	&:after {
-		transform: translateX(($controlArrowSize - $controlArrowLength)/2) translateY(($controlArrowSize - $controlArrowThickness)/2) rotate( -$angle );
+		transform: translateX(($controlArrowSize - $controlArrowLength)*0.5) translateY(($controlArrowSize - $controlArrowThickness)*0.5) rotate( -$angle );
 	}
 }
 
@@ -300,11 +315,11 @@ $controlsArrowAngleActive: 36deg;
 		left: 0;
 		width: $controlArrowLength;
 		height: $controlArrowThickness;
-		border-radius: $controlArrowThickness/2;
+		border-radius: $controlArrowThickness*0.5;
 		background-color: currentColor;
 
 		transition: all 0.15s ease, background-color 0.8s ease;
-		transform-origin: floor(($controlArrowThickness/2)*10)/10 50%;
+		transform-origin: math.div(floor(($controlArrowThickness*0.5)*10), 10) 50%;
 		will-change: transform;
 	}
 
@@ -326,7 +341,7 @@ $controlsArrowAngleActive: 36deg;
 
 	.navigate-left {
 		right: $controlArrowSize + $controlArrowSpacing*2;
-		bottom: $controlArrowSpacing + $controlArrowSize/2;
+		bottom: $controlArrowSpacing + $controlArrowSize*0.5;
 		transform: translateX( -10px );
 
 		&.highlight {
@@ -336,7 +351,7 @@ $controlsArrowAngleActive: 36deg;
 
 	.navigate-right {
 		right: 0;
-		bottom: $controlArrowSpacing + $controlArrowSize/2;
+		bottom: $controlArrowSpacing + $controlArrowSize*0.5;
 		transform: translateX( 10px );
 
 		.controls-arrow {
@@ -349,7 +364,7 @@ $controlsArrowAngleActive: 36deg;
 	}
 
 	.navigate-up {
-		right: $controlArrowSpacing + $controlArrowSize/2;
+		right: $controlArrowSpacing + $controlArrowSize*0.5;
 		bottom: $controlArrowSpacing*2 + $controlArrowSize;
 		transform: translateY( -10px );
 
@@ -359,7 +374,7 @@ $controlsArrowAngleActive: 36deg;
 	}
 
 	.navigate-down {
-		right: $controlArrowSpacing + $controlArrowSize/2;
+		right: $controlArrowSpacing + $controlArrowSize*0.5;
 		bottom: -$controlArrowSpacing;
 		padding-bottom: $controlArrowSpacing;
 		transform: translateY( 10px );
@@ -515,25 +530,25 @@ $controlsArrowAngleActive: 36deg;
 		.navigate-left {
 			top: 50%;
 			left: $spacing;
-			margin-top: -$controlArrowSize/2;
+			margin-top: -$controlArrowSize*0.5;
 		}
 
 		.navigate-right {
 			top: 50%;
 			right: $spacing;
-			margin-top: -$controlArrowSize/2;
+			margin-top: -$controlArrowSize*0.5;
 		}
 
 		.navigate-up {
 			top: $spacing;
 			left: 50%;
-			margin-left: -$controlArrowSize/2;
+			margin-left: -$controlArrowSize*0.5;
 		}
 
 		.navigate-down {
 			bottom: $spacing - $controlArrowSpacing + 0.3em;
 			left: 50%;
-			margin-left: -$controlArrowSize/2;
+			margin-left: -$controlArrowSize*0.5;
 		}
 	}
 
@@ -645,7 +660,6 @@ $controlsArrowAngleActive: 36deg;
 	display: none;
 	position: absolute;
 	width: 100%;
-	padding: 20px 0px;
 	pointer-events: auto;
 
 	z-index: 10;
@@ -712,6 +726,8 @@ $controlsArrowAngleActive: 36deg;
 
 .reveal .slides>section.past,
 .reveal .slides>section.future,
+.reveal .slides>section.past>section,
+.reveal .slides>section.future>section,
 .reveal .slides>section>section.past,
 .reveal .slides>section>section.future {
 	opacity: 0;
@@ -770,9 +786,6 @@ $controlsArrowAngleActive: 36deg;
  *********************************************/
 
 @each $stylename in slide, linear {
-	.reveal.#{$stylename} section {
-		backface-visibility: hidden;
-	}
 	@include transition-horizontal-past(#{$stylename}) {
 		transform: translate(-150%, 0);
 	}
@@ -1159,54 +1172,53 @@ $controlsArrowAngleActive: 36deg;
 	}
 
 /* Immediate transition style */
-.reveal[data-background-transition=none]>.backgrounds .slide-background,
+.reveal[data-background-transition=none]>.backgrounds .slide-background:not([data-background-transition]),
 .reveal>.backgrounds .slide-background[data-background-transition=none] {
 	transition: none;
 }
 
 /* Slide */
-.reveal[data-background-transition=slide]>.backgrounds .slide-background,
+.reveal[data-background-transition=slide]>.backgrounds .slide-background:not([data-background-transition]),
 .reveal>.backgrounds .slide-background[data-background-transition=slide] {
 	opacity: 1;
-	backface-visibility: hidden;
 }
-	.reveal[data-background-transition=slide]>.backgrounds .slide-background.past,
+	.reveal[data-background-transition=slide]>.backgrounds .slide-background.past:not([data-background-transition]),
 	.reveal>.backgrounds .slide-background.past[data-background-transition=slide] {
 		transform: translate(-100%, 0);
 	}
-	.reveal[data-background-transition=slide]>.backgrounds .slide-background.future,
+	.reveal[data-background-transition=slide]>.backgrounds .slide-background.future:not([data-background-transition]),
 	.reveal>.backgrounds .slide-background.future[data-background-transition=slide] {
 		transform: translate(100%, 0);
 	}
 
-	.reveal[data-background-transition=slide]>.backgrounds .slide-background>.slide-background.past,
+	.reveal[data-background-transition=slide]>.backgrounds .slide-background>.slide-background.past:not([data-background-transition]),
 	.reveal>.backgrounds .slide-background>.slide-background.past[data-background-transition=slide] {
 		transform: translate(0, -100%);
 	}
-	.reveal[data-background-transition=slide]>.backgrounds .slide-background>.slide-background.future,
+	.reveal[data-background-transition=slide]>.backgrounds .slide-background>.slide-background.future:not([data-background-transition]),
 	.reveal>.backgrounds .slide-background>.slide-background.future[data-background-transition=slide] {
 		transform: translate(0, 100%);
 	}
 
 
 /* Convex */
-.reveal[data-background-transition=convex]>.backgrounds .slide-background.past,
+.reveal[data-background-transition=convex]>.backgrounds .slide-background.past:not([data-background-transition]),
 .reveal>.backgrounds .slide-background.past[data-background-transition=convex] {
 	opacity: 0;
 	transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0);
 }
-.reveal[data-background-transition=convex]>.backgrounds .slide-background.future,
+.reveal[data-background-transition=convex]>.backgrounds .slide-background.future:not([data-background-transition]),
 .reveal>.backgrounds .slide-background.future[data-background-transition=convex] {
 	opacity: 0;
 	transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0);
 }
 
-.reveal[data-background-transition=convex]>.backgrounds .slide-background>.slide-background.past,
+.reveal[data-background-transition=convex]>.backgrounds .slide-background>.slide-background.past:not([data-background-transition]),
 .reveal>.backgrounds .slide-background>.slide-background.past[data-background-transition=convex] {
 	opacity: 0;
 	transform: translate3d(0, -100%, 0) rotateX(90deg) translate3d(0, -100%, 0);
 }
-.reveal[data-background-transition=convex]>.backgrounds .slide-background>.slide-background.future,
+.reveal[data-background-transition=convex]>.backgrounds .slide-background>.slide-background.future:not([data-background-transition]),
 .reveal>.backgrounds .slide-background>.slide-background.future[data-background-transition=convex] {
 	opacity: 0;
 	transform: translate3d(0, 100%, 0) rotateX(-90deg) translate3d(0, 100%, 0);
@@ -1214,54 +1226,54 @@ $controlsArrowAngleActive: 36deg;
 
 
 /* Concave */
-.reveal[data-background-transition=concave]>.backgrounds .slide-background.past,
+.reveal[data-background-transition=concave]>.backgrounds .slide-background.past:not([data-background-transition]),
 .reveal>.backgrounds .slide-background.past[data-background-transition=concave] {
 	opacity: 0;
 	transform: translate3d(-100%, 0, 0) rotateY(90deg) translate3d(-100%, 0, 0);
 }
-.reveal[data-background-transition=concave]>.backgrounds .slide-background.future,
+.reveal[data-background-transition=concave]>.backgrounds .slide-background.future:not([data-background-transition]),
 .reveal>.backgrounds .slide-background.future[data-background-transition=concave] {
 	opacity: 0;
 	transform: translate3d(100%, 0, 0) rotateY(-90deg) translate3d(100%, 0, 0);
 }
 
-.reveal[data-background-transition=concave]>.backgrounds .slide-background>.slide-background.past,
+.reveal[data-background-transition=concave]>.backgrounds .slide-background>.slide-background.past:not([data-background-transition]),
 .reveal>.backgrounds .slide-background>.slide-background.past[data-background-transition=concave] {
 	opacity: 0;
 	transform: translate3d(0, -100%, 0) rotateX(-90deg) translate3d(0, -100%, 0);
 }
-.reveal[data-background-transition=concave]>.backgrounds .slide-background>.slide-background.future,
+.reveal[data-background-transition=concave]>.backgrounds .slide-background>.slide-background.future:not([data-background-transition]),
 .reveal>.backgrounds .slide-background>.slide-background.future[data-background-transition=concave] {
 	opacity: 0;
 	transform: translate3d(0, 100%, 0) rotateX(90deg) translate3d(0, 100%, 0);
 }
 
 /* Zoom */
-.reveal[data-background-transition=zoom]>.backgrounds .slide-background,
+.reveal[data-background-transition=zoom]>.backgrounds .slide-background:not([data-background-transition]),
 .reveal>.backgrounds .slide-background[data-background-transition=zoom] {
 	transition-timing-function: ease;
 }
 
-.reveal[data-background-transition=zoom]>.backgrounds .slide-background.past,
+.reveal[data-background-transition=zoom]>.backgrounds .slide-background.past:not([data-background-transition]),
 .reveal>.backgrounds .slide-background.past[data-background-transition=zoom] {
 	opacity: 0;
 	visibility: hidden;
 	transform: scale(16);
 }
-.reveal[data-background-transition=zoom]>.backgrounds .slide-background.future,
+.reveal[data-background-transition=zoom]>.backgrounds .slide-background.future:not([data-background-transition]),
 .reveal>.backgrounds .slide-background.future[data-background-transition=zoom] {
 	opacity: 0;
 	visibility: hidden;
 	transform: scale(0.2);
 }
 
-.reveal[data-background-transition=zoom]>.backgrounds .slide-background>.slide-background.past,
+.reveal[data-background-transition=zoom]>.backgrounds .slide-background>.slide-background.past:not([data-background-transition]),
 .reveal>.backgrounds .slide-background>.slide-background.past[data-background-transition=zoom] {
 	opacity: 0;
 		visibility: hidden;
 		transform: scale(16);
 }
-.reveal[data-background-transition=zoom]>.backgrounds .slide-background>.slide-background.future,
+.reveal[data-background-transition=zoom]>.backgrounds .slide-background>.slide-background.future:not([data-background-transition]),
 .reveal>.backgrounds .slide-background>.slide-background.future[data-background-transition=zoom] {
 	opacity: 0;
 	visibility: hidden;
@@ -1396,7 +1408,7 @@ $controlsArrowAngleActive: 36deg;
 }
 
 .reveal.rtl .progress span {
-	float: right
+	transform-origin: 100% 0;
 }
 
 /*********************************************
@@ -1702,7 +1714,7 @@ $notesWidthPercent: 25%;
 .reveal .speaker-notes {
 	display: none;
 	position: absolute;
-	width: $notesWidthPercent / (1-$notesWidthPercent/100) * 1%;
+	width: math.div($notesWidthPercent, (1 - math.div($notesWidthPercent,100))) * 1%;
 	height: 100%;
 	top: 0;
 	left: 100%;
@@ -1765,7 +1777,6 @@ $notesWidthPercent: 25%;
 		top: 100%;
 		left: 0;
 		width: 100%;
-		height: (30/0.7)*1%;
 		height: 30vh;
 		border: 0;
 	}
@@ -1779,7 +1790,6 @@ $notesWidthPercent: 25%;
 
 	.reveal.show-notes .speaker-notes {
 		top: 100%;
-		height: (40/0.6)*1%;
 		height: 40vh;
 	}
 
@@ -1789,6 +1799,43 @@ $notesWidthPercent: 25%;
 }
 
 
+/*********************************************
+ * JUMP-TO-SLIDE COMPONENT
+ *********************************************/
+
+ .reveal .jump-to-slide {
+	position: absolute;
+	top: 15px;
+	left: 15px;
+	z-index: 30;
+	font-size: 32px;
+	-webkit-tap-highlight-color: rgba( 0, 0, 0, 0 );
+}
+
+.reveal .jump-to-slide-input {
+	background: transparent;
+	padding: 8px;
+	font-size: inherit;
+	color: currentColor;
+	border: 0;
+}
+.reveal .jump-to-slide-input::placeholder {
+	color: currentColor;
+	opacity: 0.5;
+}
+
+.reveal.has-dark-background .jump-to-slide-input {
+	color: #fff;
+}
+.reveal.has-light-background .jump-to-slide-input {
+	color: #222;
+}
+
+.reveal .jump-to-slide-input:focus {
+	outline: none;
+}
+
+
 /*********************************************
  * ZOOM PLUGIN
  *********************************************/

css/theme/README.md

@@ -1,6 +1,6 @@
 ## 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 installed before proceeding: https://revealjs.revealjs.com/installation/#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
 

css/theme/source/beige.scss

@@ -13,7 +13,7 @@
 
 
 // Include theme-specific fonts
-@import url(fonts/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-contrast.scss

@@ -0,0 +1,49 @@
+/**
+ * Black compact & high contrast reveal.js theme, with headers not in capitals.
+ *
+ * By Peter Kehl. Based on black.(s)css by Hakim El Hattab, http://hakim.se
+ *
+ * - Keep the source similar to black.css - for easy comparison.
+ * - $mainFontSize controls code blocks, too (although under some ratio).
+ */
+
+
+// Default mixins and settings -----------------
+@import "../template/mixins";
+@import "../template/settings";
+// ---------------------------------------------
+
+
+// Include theme-specific fonts
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
+
+
+// Override theme settings (see ../template/settings.scss)
+$backgroundColor: #000000;
+
+$mainColor: #fff;
+$headingColor: #fff;
+
+$mainFontSize: 42px;
+$mainFont: 'Source Sans Pro', Helvetica, sans-serif;
+$headingFont: 'Source Sans Pro', Helvetica, sans-serif;
+$headingTextShadow: none;
+$headingLetterSpacing: normal;
+$headingTextTransform: uppercase;
+$headingFontWeight: 600;
+$linkColor: #42affa;
+$linkColorHover: lighten( $linkColor, 15% );
+$selectionBackgroundColor: lighten( $linkColor, 25% );
+
+$heading1Size: 2.5em;
+$heading2Size: 1.6em;
+$heading3Size: 1.3em;
+$heading4Size: 1.0em;
+
+// Change text colors against light slide backgrounds
+@include light-bg-text-color(#000);
+
+
+// Theme template ------------------------------
+@import "../template/theme";
+// ---------------------------------------------

css/theme/source/black.scss

@@ -12,7 +12,7 @@
 
 
 // Include theme-specific fonts
-@import url(fonts/source-sans-pro/source-sans-pro.css);
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
 
 
 // Override theme settings (see ../template/settings.scss)
@@ -30,20 +30,17 @@ $headingTextTransform: uppercase;
 $headingFontWeight: 600;
 $linkColor: #42affa;
 $linkColorHover: lighten( $linkColor, 15% );
-$selectionBackgroundColor: lighten( $linkColor, 25% );
+$selectionBackgroundColor: rgba( $linkColor, 0.75 );
 
 $heading1Size: 2.5em;
 $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

@@ -46,6 +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";
@@ -58,6 +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/dracula.scss

@@ -0,0 +1,106 @@
+/**
+ * Dracula Dark theme for reveal.js.
+ * Based on https://draculatheme.com
+ */
+
+
+// Default mixins and settings -----------------
+@import "../template/mixins";
+@import "../template/settings";
+// ---------------------------------------------
+
+
+
+// Include theme-specific fonts
+$systemFontsSansSerif: -apple-system,
+					   BlinkMacSystemFont,
+					   avenir next,
+					   avenir,
+					   segoe ui,
+					   helvetica neue,
+					   helvetica,
+					   Cantarell,
+					   Ubuntu,
+					   roboto,
+					   noto,
+					   arial,
+					   sans-serif;
+$systemFontsMono: Menlo,
+				  Consolas,
+				  Monaco,
+				  Liberation Mono,
+				  Lucida Console,
+				  monospace;
+
+/**
+ * Dracula colors by Zeno Rocha
+ * https://draculatheme.com/contribute
+ */
+html * {
+	color-profile: sRGB;
+	rendering-intent: auto;
+}
+
+$background: #282A36;
+$foreground: #F8F8F2;
+$selection: #44475A;
+$comment: #6272A4;
+$red: #FF5555;
+$orange: #FFB86C;
+$yellow: #F1FA8C;
+$green: #50FA7B;
+$purple: #BD93F9;
+$cyan: #8BE9FD;
+$pink: #FF79C6;
+
+
+
+// Override theme settings (see ../template/settings.scss)
+$mainColor: $foreground;
+$headingColor: $purple;
+$headingTextShadow: none;
+$headingTextTransform: none;
+$backgroundColor: $background;
+$linkColor: $pink;
+$linkColorHover: $cyan;
+$selectionBackgroundColor: $selection;
+$inlineCodeColor: $green;
+$listBulletColor: $cyan;
+
+$mainFont: $systemFontsSansSerif;
+$codeFont: "Fira Code", $systemFontsMono;
+
+// Change text colors against light slide backgrounds
+@include light-bg-text-color($background);
+
+// Theme template ------------------------------
+@import "../template/theme";
+// ---------------------------------------------
+
+// Define additional color effects based on Dracula spec
+// https://spec.draculatheme.com/
+:root {
+	--r-bold-color: #{$orange};
+	--r-italic-color: #{$yellow};
+	--r-inline-code-color: #{$inlineCodeColor};
+	--r-list-bullet-color: #{$listBulletColor};
+}
+
+.reveal {
+	strong, b {
+		color: var(--r-bold-color);
+	}
+	em, i, blockquote {
+		color: var(--r-italic-color);
+	}
+	code {
+		color: var(--r-inline-code-color);
+	}
+	// Dracula colored list bullets and numbers
+	ul, ol {
+		li::marker {
+			color: var(--r-list-bullet-color);
+		}
+	}
+}
+

css/theme/source/league.scss

@@ -15,7 +15,7 @@
 
 
 // Include theme-specific fonts
-@import url(fonts/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(fonts/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

@@ -28,6 +28,9 @@ $headingLetterSpacing: -0.03em;
 $headingTextTransform: none;
 $selectionBackgroundColor: #e7ad52;
 
+// Change text colors against light slide backgrounds
+@include light-bg-text-color(#222);
+
 
 // Theme template ------------------------------
 @import "../template/theme";

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

@@ -31,11 +31,8 @@ $linkColor: #00008B;
 $linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: rgba(0, 0, 0, 0.99);
 
-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 ------------------------------

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(fonts/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-contrast.scss

@@ -0,0 +1,49 @@
+/**
+ * White compact & high contrast reveal.js theme, with headers not in capitals.
+ *
+ * By Peter Kehl. Based on white.(s)css by Hakim El Hattab, http://hakim.se
+ *
+ * - Keep the source similar to black.css - for easy comparison.
+ * - $mainFontSize controls code blocks, too (although under some ratio).
+ */
+
+
+// Default mixins and settings -----------------
+@import "../template/mixins";
+@import "../template/settings";
+// ---------------------------------------------
+
+
+// Include theme-specific fonts
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
+
+
+// Override theme settings (see ../template/settings.scss)
+$backgroundColor: #fff;
+
+$mainColor: #000;
+$headingColor: #000;
+
+$mainFontSize: 42px;
+$mainFont: 'Source Sans Pro', Helvetica, sans-serif;
+$headingFont: 'Source Sans Pro', Helvetica, sans-serif;
+$headingTextShadow: none;
+$headingLetterSpacing: normal;
+$headingTextTransform: uppercase;
+$headingFontWeight: 600;
+$linkColor: #2a76dd;
+$linkColorHover: lighten( $linkColor, 15% );
+$selectionBackgroundColor: lighten( $linkColor, 25% );
+
+$heading1Size: 2.5em;
+$heading2Size: 1.6em;
+$heading3Size: 1.3em;
+$heading4Size: 1.0em;
+
+// Change text colors against dark slide backgrounds
+@include dark-bg-text-color(#fff);
+
+
+// Theme template ------------------------------
+@import "../template/theme";
+// ---------------------------------------------

css/theme/source/white.scss

@@ -12,7 +12,7 @@
 
 
 // Include theme-specific fonts
-@import url(fonts/source-sans-pro/source-sans-pro.css);
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
 
 
 // Override theme settings (see ../template/settings.scss)
@@ -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

@@ -1,27 +1,28 @@
 // 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: #{$selectionColor};
+  --r-background-color: #{$backgroundColor};
+  --r-main-font: #{$mainFont};
+  --r-main-font-size: #{$mainFontSize};
+  --r-main-color: #{$mainColor};
+  --r-block-margin: #{$blockMargin};
+  --r-heading-margin: #{$headingMargin};
+  --r-heading-font: #{$headingFont};
+  --r-heading-color: #{$headingColor};
+  --r-heading-line-height: #{$headingLineHeight};
+  --r-heading-letter-spacing: #{$headingLetterSpacing};
+  --r-heading-text-transform: #{$headingTextTransform};
+  --r-heading-text-shadow: #{$headingTextShadow};
+  --r-heading-font-weight: #{$headingFontWeight};
+  --r-heading1-text-shadow: #{$heading1TextShadow};
+  --r-heading1-size: #{$heading1Size};
+  --r-heading2-size: #{$heading2Size};
+  --r-heading3-size: #{$heading3Size};
+  --r-heading4-size: #{$heading4Size};
+  --r-code-font: #{$codeFont};
+  --r-link-color: #{$linkColor};
+  --r-link-color-dark: #{darken($linkColor , 15% )};
+  --r-link-color-hover: #{$linkColorHover};
+  --r-selection-background-color: #{$selectionBackgroundColor};
+  --r-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/theme.scss

@@ -8,25 +8,25 @@
 
 .reveal-viewport {
 	@include bodyBackground();
-	background-color: $backgroundColor;
+	background-color: var(--r-background-color);
 }
 
 .reveal {
-	font-family: $mainFont;
-	font-size: $mainFontSize;
+	font-family: var(--r-main-font);
+	font-size: var(--r-main-font-size);
 	font-weight: normal;
-	color: $mainColor;
+	color: var(--r-main-color);
 }
 
 .reveal ::selection {
-	color: $selectionColor;
-	background: $selectionBackgroundColor;
+	color: var(--r-selection-color);
+	background: var(--r-selection-background-color);
 	text-shadow: none;
 }
 
 .reveal ::-moz-selection {
-	color: $selectionColor;
-	background: $selectionBackgroundColor;
+	color: var(--r-selection-color);
+	background: var(--r-selection-background-color);
 	text-shadow: none;
 }
 
@@ -46,27 +46,27 @@
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-	margin: $headingMargin;
-	color: $headingColor;
+	margin: var(--r-heading-margin);
+	color: var(--r-heading-color);
 
-	font-family: $headingFont;
-	font-weight: $headingFontWeight;
-	line-height: $headingLineHeight;
-	letter-spacing: $headingLetterSpacing;
+	font-family: var(--r-heading-font);
+	font-weight: var(--r-heading-font-weight);
+	line-height: var(--r-heading-line-height);
+	letter-spacing: var(--r-heading-letter-spacing);
 
-	text-transform: $headingTextTransform;
-	text-shadow: $headingTextShadow;
+	text-transform: var(--r-heading-text-transform);
+	text-shadow: var(--r-heading-text-shadow);
 
 	word-wrap: break-word;
 }
 
-.reveal h1 {font-size: $heading1Size; }
-.reveal h2 {font-size: $heading2Size; }
-.reveal h3 {font-size: $heading3Size; }
-.reveal h4 {font-size: $heading4Size; }
+.reveal h1 {font-size: var(--r-heading1-size); }
+.reveal h2 {font-size: var(--r-heading2-size); }
+.reveal h3 {font-size: var(--r-heading3-size); }
+.reveal h4 {font-size: var(--r-heading4-size); }
 
 .reveal h1 {
-	text-shadow: $heading1TextShadow;
+	text-shadow: var(--r-heading1-text-shadow);
 }
 
 
@@ -75,10 +75,20 @@
  *********************************************/
 
 .reveal p {
-	margin: $blockMargin 0;
+	margin: var(--r-block-margin) 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,
@@ -140,7 +150,7 @@
 	display: block;
 	position: relative;
 	width: 70%;
-	margin: $blockMargin auto;
+	margin: var(--r-block-margin) auto;
 	padding: 5px;
 
 	font-style: italic;
@@ -160,11 +170,11 @@
 	display: block;
 	position: relative;
 	width: 90%;
-	margin: $blockMargin auto;
+	margin: var(--r-block-margin) auto;
 
 	text-align: left;
 	font-size: 0.55em;
-	font-family: $codeFont;
+	font-family: var(--r-code-font);
 	line-height: 1.2em;
 
 	word-wrap: break-word;
@@ -173,8 +183,9 @@
 }
 
 .reveal code {
-	font-family: $codeFont;
+	font-family: var(--r-code-font);
 	text-transform: none;
+	tab-size: 2;
 }
 
 .reveal pre code {
@@ -185,6 +196,14 @@
 	word-wrap: normal;
 }
 
+.reveal .code-wrapper {
+	white-space: normal;
+}
+
+.reveal .code-wrapper code {
+	white-space: pre;
+}
+
 .reveal table {
 	margin: auto;
 	border-collapse: collapse;
@@ -238,7 +257,7 @@
 }
 
 .reveal img {
-	margin: $blockMargin 0;
+	margin: var(--r-block-margin) 0;
 }
 
 
@@ -247,19 +266,21 @@
  *********************************************/
 
 .reveal a {
-	color: $linkColor;
+	color: var(--r-link-color);
 	text-decoration: none;
 	transition: color .15s ease;
 }
 	.reveal a:hover {
-		color: $linkColorHover;
+		color: var(--r-link-color-hover);
 		text-shadow: none;
 		border: none;
 	}
 
 .reveal .roll span:after {
 	color: #fff;
-	background: darken( $linkColor, 15% );
+	// background: darken( var(--r-link-color), 15% );
+	 background: var(--r-link-color-dark);
+
 }
 
 
@@ -268,7 +289,7 @@
  *********************************************/
 
 .reveal .r-frame {
-	border: 4px solid $mainColor;
+	border: 4px solid var(--r-main-color);
 	box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
 }
 
@@ -277,7 +298,7 @@
 }
 
 .reveal a:hover .r-frame {
-	border-color: $linkColor;
+	border-color: var(--r-link-color);
 	box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
 }
 
@@ -287,7 +308,7 @@
  *********************************************/
 
 .reveal .controls {
-	color: $linkColor;
+	color: var(--r-link-color);
 }
 
 
@@ -297,7 +318,7 @@
 
 .reveal .progress {
 	background: rgba(0,0,0,0.2);
-	color: $linkColor;
+	color: var(--r-link-color);
 }
 
 /*********************************************
@@ -305,6 +326,6 @@
  *********************************************/
  @media print {
     .backgrounds {
-        background-color: $backgroundColor;
+        background-color: var(--r-background-color);
     }
 }

demo.html

@@ -19,7 +19,7 @@
 		<link rel="stylesheet" href="dist/theme/black.css" id="theme">
 
 		<!-- Theme used for syntax highlighting of code -->
-		<link rel="stylesheet" href="plugin/highlight/monokai.css" id="highlight-theme">
+		<link rel="stylesheet" href="plugin/highlight/monokai.css">
 	</head>
 
 	<body>
@@ -29,7 +29,9 @@
 			<!-- 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> and <a href="https://github.com/hakimel/reveal.js/graphs/contributors">contributors</a></small>
@@ -50,8 +52,8 @@
 						<p>Slides can be nested inside of each other.</p>
 						<p>Use the <em>Space</em> key to navigate through all slides.</p>
 						<br>
-						<a href="#" class="navigate-down">
-							<img class="r-frame" style="background: rgba(255,255,255,0.1);" width="178" height="238" data-src="https://s3.amazonaws.com/hakim-static/reveal-js/arrow.png" alt="Down arrow">
+						<a href="#/2/1" class="navigate-down">
+							<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>
@@ -63,7 +65,7 @@
 						<p>That's it, time to go back up.</p>
 						<br>
 						<a href="#/2">
-							<img class="r-frame" style="background: rgba(255,255,255,0.1); transform: rotate(180deg);" width="178" height="238" data-src="https://s3.amazonaws.com/hakim-static/reveal-js/arrow.png" alt="Up arrow">
+							<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>
@@ -75,9 +77,16 @@
 					</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>
+					<pre data-id="code-animation"><code class="hljs javascript" data-trim data-line-numbers>
 						import React, { useState } from 'react';
 
 						function Example() {
@@ -92,20 +101,20 @@
 				</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">
+					<h2 data-id="code-title">With Animations</h2>
+					<pre data-id="code-animation"><code class="hljs javascript" 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 (
-						    &lt;div&gt;
-						      &lt;p&gt;You clicked {count} times&lt;/p&gt;
-						      &lt;button onClick={() =&gt; setCount(count + 1)}&gt;
+						    <div>
+						      <p>You clicked {count} times</p>
+						      <button onClick={() => setCount(count + 1)}>
 						        Click me
-						      &lt;/button&gt;
-						    &lt;/div&gt;
+						      </button>
+						    </div>
 						  );
 						}
 
@@ -113,15 +122,15 @@
 						  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;
+						    <div>
+						      <p>You clicked {count} times</p>
+						      <button onClick={() => setCount(count + 1)}>
 						        Click me
-						      &lt;/button&gt;
-						    &lt;/div&gt;
+						      </button>
+						    </div>
 						  );
 						}
-					</code></pre>
+					</script></code></pre>
 				</section>
 
 				<section>
@@ -172,22 +181,27 @@
 
 				<section data-markdown>
 					<script type="text/template">
-						## Markdown support
+						## Markdown Support
 
 						Write content using inline or external Markdown.
-						Instructions and more info available in the [readme](https://revealjs.com/markdown/).
+						Instructions and more info available in the [docs](https://revealjs.com/markdown/).
 
-						```[]
+						```html []
 						<section data-markdown>
-						  ## Markdown support
+						  ## Markdown Support
 
 						  Write content using inline or external Markdown.
-						  Instructions and more info available in the [readme](https://revealjs.com/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>
@@ -235,17 +249,17 @@
 					<p>
 						reveal.js comes with a few themes built in: <br>
 						<!-- Hacks to swap themes after the page has loaded. Not flexible and only intended for the reveal.js demo deck. -->
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/black.css'); return false;">Black (default)</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/white.css'); return false;">White</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/league.css'); return false;">League</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/sky.css'); return false;">Sky</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/beige.css'); return false;">Beige</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/simple.css'); return false;">Simple</a> <br>
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/serif.css'); return false;">Serif</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/blood.css'); return false;">Blood</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/night.css'); return false;">Night</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/moon.css'); return false;">Moon</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','css/theme/solarized.css'); return false;">Solarized</a>
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/black.css'); return false;">Black (default)</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/white.css'); return false;">White</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/league.css'); return false;">League</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/sky.css'); return false;">Sky</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/beige.css'); return false;">Beige</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/simple.css'); return false;">Simple</a> <br>
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/serif.css'); return false;">Serif</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/blood.css'); return false;">Blood</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/night.css'); return false;">Night</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/moon.css'); return false;">Moon</a> -
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/solarized.css'); return false;">Solarized</a>
 					</p>
 				</section>
 
@@ -256,18 +270,23 @@
 							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 class="r-frame" style="background: rgba(255,255,255,0.1);" 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-gradient="linear-gradient(to bottom, #283b95, #17b2c3)">
+						<h2>Gradient Backgrounds</h2>
+						<pre><code class="hljs html wrap">&lt;section data-background-gradient=
+							"linear-gradient(to bottom, #ddd, #191919)"&gt;</code></pre>
+					</section>
+					<section data-background="https://static.slid.es/reveal/image-placeholder.png">
 						<h2>Image Backgrounds</h2>
 						<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 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://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 html" style="word-wrap: break-word;">&lt;section data-background-video="video.mp4,video.webm"&gt;</code></pre>

dist/theme/beige.css

@@ -3,35 +3,41 @@
  *
  * Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se
  */
-@import url(fonts/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
  *********************************************/
 :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; }
+  --r-background-color: #f7f3de;
+  --r-main-font: Lato, sans-serif;
+  --r-main-font-size: 40px;
+  --r-main-color: #333;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: League Gothic, Impact, sans-serif;
+  --r-heading-color: #333;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: normal;
+  --r-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);
+  --r-heading1-size: 3.77em;
+  --r-heading2-size: 2.11em;
+  --r-heading3-size: 1.55em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #8b743d;
+  --r-link-color-dark: #564826;
+  --r-link-color-hover: #c0a86e;
+  --r-selection-background-color: rgba(79, 64, 28, 0.99);
+  --r-selection-color: #fff;
+}
 
 .reveal-viewport {
   background: #f7f2d3;
@@ -41,28 +47,33 @@
   background: -o-radial-gradient(center, circle cover, white 0%, #f7f2d3 100%);
   background: -ms-radial-gradient(center, circle cover, white 0%, #f7f2d3 100%);
   background: radial-gradient(center, circle cover, white 0%, #f7f2d3 100%);
-  background-color: #f7f3de; }
+  background-color: var(--r-background-color);
+}
 
 .reveal {
-  font-family: "Lato", sans-serif;
-  font-size: 40px;
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
   font-weight: normal;
-  color: #333; }
+  color: var(--r-main-color);
+}
 
 .reveal ::selection {
-  color: #fff;
-  background: rgba(79, 64, 28, 0.99);
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal ::-moz-selection {
-  color: #fff;
-  background: rgba(79, 64, 28, 0.99);
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal .slides section,
 .reveal .slides section > section {
   line-height: 1.3;
-  font-weight: inherit; }
+  font-weight: inherit;
+}
 
 /*********************************************
  * HEADERS
@@ -73,217 +84,281 @@
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  margin: 0 0 20px 0;
-  color: #333;
-  font-family: "League Gothic", Impact, sans-serif;
-  font-weight: normal;
-  line-height: 1.2;
-  letter-spacing: normal;
-  text-transform: uppercase;
-  text-shadow: none;
-  word-wrap: break-word; }
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
 
 .reveal h1 {
-  font-size: 3.77em; }
+  font-size: var(--r-heading1-size);
+}
 
 .reveal h2 {
-  font-size: 2.11em; }
+  font-size: var(--r-heading2-size);
+}
 
 .reveal h3 {
-  font-size: 1.55em; }
+  font-size: var(--r-heading3-size);
+}
 
 .reveal h4 {
-  font-size: 1em; }
+  font-size: var(--r-heading4-size);
+}
 
 .reveal h1 {
-  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); }
+  text-shadow: var(--r-heading1-text-shadow);
+}
 
 /*********************************************
  * OTHER
  *********************************************/
 .reveal p {
-  margin: 20px 0;
-  line-height: 1.3; }
+  margin: var(--r-block-margin) 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,
 .reveal iframe {
   max-width: 95%;
-  max-height: 95%; }
+  max-height: 95%;
+}
 
 .reveal strong,
 .reveal b {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal em {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal ol,
 .reveal dl,
 .reveal ul {
   display: inline-block;
   text-align: left;
-  margin: 0 0 0 1em; }
+  margin: 0 0 0 1em;
+}
 
 .reveal ol {
-  list-style-type: decimal; }
+  list-style-type: decimal;
+}
 
 .reveal ul {
-  list-style-type: disc; }
+  list-style-type: disc;
+}
 
 .reveal ul ul {
-  list-style-type: square; }
+  list-style-type: square;
+}
 
 .reveal ul ul ul {
-  list-style-type: circle; }
+  list-style-type: circle;
+}
 
 .reveal ul ul,
 .reveal ul ol,
 .reveal ol ol,
 .reveal ol ul {
   display: block;
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal dt {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal dd {
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal blockquote {
   display: block;
   position: relative;
   width: 70%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   padding: 5px;
   font-style: italic;
   background: rgba(255, 255, 255, 0.05);
-  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
 
 .reveal blockquote p:first-child,
 .reveal blockquote p:last-child {
-  display: inline-block; }
+  display: inline-block;
+}
 
 .reveal q {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal pre {
   display: block;
   position: relative;
   width: 90%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   text-align: left;
   font-size: 0.55em;
-  font-family: monospace;
+  font-family: var(--r-code-font);
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
 
 .reveal code {
-  font-family: monospace;
-  text-transform: none; }
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
 
 .reveal pre code {
   display: block;
   padding: 5px;
   overflow: auto;
   max-height: 400px;
-  word-wrap: normal; }
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
 
 .reveal table {
   margin: auto;
   border-collapse: collapse;
-  border-spacing: 0; }
+  border-spacing: 0;
+}
 
 .reveal table th {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal table th,
 .reveal table td {
   text-align: left;
   padding: 0.2em 0.5em 0.2em 0.5em;
-  border-bottom: 1px solid; }
+  border-bottom: 1px solid;
+}
 
-.reveal table th[align="center"],
-.reveal table td[align="center"] {
-  text-align: center; }
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
 
-.reveal table th[align="right"],
-.reveal table td[align="right"] {
-  text-align: right; }
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
 
 .reveal table tbody tr:last-child th,
 .reveal table tbody tr:last-child td {
-  border-bottom: none; }
+  border-bottom: none;
+}
 
 .reveal sup {
   vertical-align: super;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal sub {
   vertical-align: sub;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal small {
   display: inline-block;
   font-size: 0.6em;
   line-height: 1.2em;
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal small * {
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal img {
-  margin: 20px 0; }
+  margin: var(--r-block-margin) 0;
+}
 
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
-  color: #8b743d;
+  color: var(--r-link-color);
   text-decoration: none;
-  transition: color .15s ease; }
+  transition: color 0.15s ease;
+}
 
 .reveal a:hover {
-  color: #c0a86e;
+  color: var(--r-link-color-hover);
   text-shadow: none;
-  border: none; }
+  border: none;
+}
 
 .reveal .roll span:after {
   color: #fff;
-  background: #564826; }
+  background: var(--r-link-color-dark);
+}
 
 /*********************************************
  * Frame helper
  *********************************************/
 .reveal .r-frame {
-  border: 4px solid #333;
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
 
 .reveal a .r-frame {
-  transition: all .15s linear; }
+  transition: all 0.15s linear;
+}
 
 .reveal a:hover .r-frame {
-  border-color: #8b743d;
-  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 .reveal .controls {
-  color: #8b743d; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
   background: rgba(0, 0, 0, 0.2);
-  color: #8b743d; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PRINT BACKGROUND
  *********************************************/
 @media print {
   .backgrounds {
-    background-color: #f7f3de; } }
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/black-contrast.css

@@ -0,0 +1,360 @@
+/**
+ * Black compact & high contrast reveal.js theme, with headers not in capitals.
+ *
+ * By Peter Kehl. Based on black.(s)css by Hakim El Hattab, http://hakim.se
+ *
+ * - Keep the source similar to black.css - for easy comparison.
+ * - $mainFontSize controls code blocks, too (although under some ratio).
+ */
+@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: #000;
+}
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+:root {
+  --r-background-color: #000000;
+  --r-main-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-main-font-size: 42px;
+  --r-main-color: #fff;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-heading-color: #fff;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: 600;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 2.5em;
+  --r-heading2-size: 1.6em;
+  --r-heading3-size: 1.3em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #42affa;
+  --r-link-color-dark: #068de9;
+  --r-link-color-hover: #8dcffc;
+  --r-selection-background-color: #bee4fd;
+  --r-selection-color: #fff;
+}
+
+.reveal-viewport {
+  background: #000000;
+  background-color: var(--r-background-color);
+}
+
+.reveal {
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
+  font-weight: normal;
+  color: var(--r-main-color);
+}
+
+.reveal ::selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal ::-moz-selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal .slides section,
+.reveal .slides section > section {
+  line-height: 1.3;
+  font-weight: inherit;
+}
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
+
+.reveal h1 {
+  font-size: var(--r-heading1-size);
+}
+
+.reveal h2 {
+  font-size: var(--r-heading2-size);
+}
+
+.reveal h3 {
+  font-size: var(--r-heading3-size);
+}
+
+.reveal h4 {
+  font-size: var(--r-heading4-size);
+}
+
+.reveal h1 {
+  text-shadow: var(--r-heading1-text-shadow);
+}
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: var(--r-block-margin) 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,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%;
+}
+
+.reveal strong,
+.reveal b {
+  font-weight: bold;
+}
+
+.reveal em {
+  font-style: italic;
+}
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em;
+}
+
+.reveal ol {
+  list-style-type: decimal;
+}
+
+.reveal ul {
+  list-style-type: disc;
+}
+
+.reveal ul ul {
+  list-style-type: square;
+}
+
+.reveal ul ul ul {
+  list-style-type: circle;
+}
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px;
+}
+
+.reveal dt {
+  font-weight: bold;
+}
+
+.reveal dd {
+  margin-left: 40px;
+}
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: var(--r-block-margin) auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block;
+}
+
+.reveal q {
+  font-style: italic;
+}
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: var(--r-block-margin) auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: var(--r-code-font);
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
+
+.reveal code {
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+.reveal table th {
+  font-weight: bold;
+}
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid;
+}
+
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
+
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none;
+}
+
+.reveal sup {
+  vertical-align: super;
+  font-size: smaller;
+}
+
+.reveal sub {
+  vertical-align: sub;
+  font-size: smaller;
+}
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top;
+}
+
+.reveal small * {
+  vertical-align: top;
+}
+
+.reveal img {
+  margin: var(--r-block-margin) 0;
+}
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: var(--r-link-color);
+  text-decoration: none;
+  transition: color 0.15s ease;
+}
+
+.reveal a:hover {
+  color: var(--r-link-color-hover);
+  text-shadow: none;
+  border: none;
+}
+
+.reveal .roll span:after {
+  color: #fff;
+  background: var(--r-link-color-dark);
+}
+
+/*********************************************
+ * Frame helper
+ *********************************************/
+.reveal .r-frame {
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
+
+.reveal a .r-frame {
+  transition: all 0.15s linear;
+}
+
+.reveal a:hover .r-frame {
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls {
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2);
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/black.css

@@ -3,62 +3,70 @@
  *
  * By Hakim El Hattab, http://hakim.se
  */
-@import url(fonts/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; }
+  color: #222;
+}
 
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
 :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; }
+  --r-background-color: #191919;
+  --r-main-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-main-font-size: 42px;
+  --r-main-color: #fff;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-heading-color: #fff;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: 600;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 2.5em;
+  --r-heading2-size: 1.6em;
+  --r-heading3-size: 1.3em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #42affa;
+  --r-link-color-dark: #068de9;
+  --r-link-color-hover: #8dcffc;
+  --r-selection-background-color: rgba(66, 175, 250, 0.75);
+  --r-selection-color: #fff;
+}
 
 .reveal-viewport {
   background: #191919;
-  background-color: #191919; }
+  background-color: var(--r-background-color);
+}
 
 .reveal {
-  font-family: "Source Sans Pro", Helvetica, sans-serif;
-  font-size: 42px;
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
   font-weight: normal;
-  color: #fff; }
+  color: var(--r-main-color);
+}
 
 .reveal ::selection {
-  color: #fff;
-  background: #bee4fd;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal ::-moz-selection {
-  color: #fff;
-  background: #bee4fd;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal .slides section,
 .reveal .slides section > section {
   line-height: 1.3;
-  font-weight: inherit; }
+  font-weight: inherit;
+}
 
 /*********************************************
  * HEADERS
@@ -69,217 +77,281 @@ section.has-light-background, section.has-light-background h1, section.has-light
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  margin: 0 0 20px 0;
-  color: #fff;
-  font-family: "Source Sans Pro", Helvetica, sans-serif;
-  font-weight: 600;
-  line-height: 1.2;
-  letter-spacing: normal;
-  text-transform: uppercase;
-  text-shadow: none;
-  word-wrap: break-word; }
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
 
 .reveal h1 {
-  font-size: 2.5em; }
+  font-size: var(--r-heading1-size);
+}
 
 .reveal h2 {
-  font-size: 1.6em; }
+  font-size: var(--r-heading2-size);
+}
 
 .reveal h3 {
-  font-size: 1.3em; }
+  font-size: var(--r-heading3-size);
+}
 
 .reveal h4 {
-  font-size: 1em; }
+  font-size: var(--r-heading4-size);
+}
 
 .reveal h1 {
-  text-shadow: none; }
+  text-shadow: var(--r-heading1-text-shadow);
+}
 
 /*********************************************
  * OTHER
  *********************************************/
 .reveal p {
-  margin: 20px 0;
-  line-height: 1.3; }
+  margin: var(--r-block-margin) 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,
 .reveal iframe {
   max-width: 95%;
-  max-height: 95%; }
+  max-height: 95%;
+}
 
 .reveal strong,
 .reveal b {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal em {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal ol,
 .reveal dl,
 .reveal ul {
   display: inline-block;
   text-align: left;
-  margin: 0 0 0 1em; }
+  margin: 0 0 0 1em;
+}
 
 .reveal ol {
-  list-style-type: decimal; }
+  list-style-type: decimal;
+}
 
 .reveal ul {
-  list-style-type: disc; }
+  list-style-type: disc;
+}
 
 .reveal ul ul {
-  list-style-type: square; }
+  list-style-type: square;
+}
 
 .reveal ul ul ul {
-  list-style-type: circle; }
+  list-style-type: circle;
+}
 
 .reveal ul ul,
 .reveal ul ol,
 .reveal ol ol,
 .reveal ol ul {
   display: block;
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal dt {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal dd {
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal blockquote {
   display: block;
   position: relative;
   width: 70%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   padding: 5px;
   font-style: italic;
   background: rgba(255, 255, 255, 0.05);
-  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
 
 .reveal blockquote p:first-child,
 .reveal blockquote p:last-child {
-  display: inline-block; }
+  display: inline-block;
+}
 
 .reveal q {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal pre {
   display: block;
   position: relative;
   width: 90%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   text-align: left;
   font-size: 0.55em;
-  font-family: monospace;
+  font-family: var(--r-code-font);
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
 
 .reveal code {
-  font-family: monospace;
-  text-transform: none; }
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
 
 .reveal pre code {
   display: block;
   padding: 5px;
   overflow: auto;
   max-height: 400px;
-  word-wrap: normal; }
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
 
 .reveal table {
   margin: auto;
   border-collapse: collapse;
-  border-spacing: 0; }
+  border-spacing: 0;
+}
 
 .reveal table th {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal table th,
 .reveal table td {
   text-align: left;
   padding: 0.2em 0.5em 0.2em 0.5em;
-  border-bottom: 1px solid; }
+  border-bottom: 1px solid;
+}
 
-.reveal table th[align="center"],
-.reveal table td[align="center"] {
-  text-align: center; }
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
 
-.reveal table th[align="right"],
-.reveal table td[align="right"] {
-  text-align: right; }
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
 
 .reveal table tbody tr:last-child th,
 .reveal table tbody tr:last-child td {
-  border-bottom: none; }
+  border-bottom: none;
+}
 
 .reveal sup {
   vertical-align: super;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal sub {
   vertical-align: sub;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal small {
   display: inline-block;
   font-size: 0.6em;
   line-height: 1.2em;
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal small * {
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal img {
-  margin: 20px 0; }
+  margin: var(--r-block-margin) 0;
+}
 
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
-  color: #42affa;
+  color: var(--r-link-color);
   text-decoration: none;
-  transition: color .15s ease; }
+  transition: color 0.15s ease;
+}
 
 .reveal a:hover {
-  color: #8dcffc;
+  color: var(--r-link-color-hover);
   text-shadow: none;
-  border: none; }
+  border: none;
+}
 
 .reveal .roll span:after {
   color: #fff;
-  background: #068de9; }
+  background: var(--r-link-color-dark);
+}
 
 /*********************************************
  * Frame helper
  *********************************************/
 .reveal .r-frame {
-  border: 4px solid #fff;
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
 
 .reveal a .r-frame {
-  transition: all .15s linear; }
+  transition: all 0.15s linear;
+}
 
 .reveal a:hover .r-frame {
-  border-color: #42affa;
-  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 .reveal .controls {
-  color: #42affa; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
   background: rgba(0, 0, 0, 0.2);
-  color: #42affa; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PRINT BACKGROUND
  *********************************************/
 @media print {
   .backgrounds {
-    background-color: #191919; } }
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/blood.css

@@ -10,58 +10,69 @@
  *
  */
 @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
  *********************************************/
 :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; }
+  --r-background-color: #222;
+  --r-main-font: Ubuntu, sans-serif;
+  --r-main-font-size: 40px;
+  --r-main-color: #eee;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Ubuntu, sans-serif;
+  --r-heading-color: #eee;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: 2px 2px 2px #222;
+  --r-heading-font-weight: normal;
+  --r-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);
+  --r-heading1-size: 3.77em;
+  --r-heading2-size: 2.11em;
+  --r-heading3-size: 1.55em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #a23;
+  --r-link-color-dark: #6a1520;
+  --r-link-color-hover: #dd5566;
+  --r-selection-background-color: #a23;
+  --r-selection-color: #fff;
+}
 
 .reveal-viewport {
   background: #222;
-  background-color: #222; }
+  background-color: var(--r-background-color);
+}
 
 .reveal {
-  font-family: Ubuntu, "sans-serif";
-  font-size: 40px;
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
   font-weight: normal;
-  color: #eee; }
+  color: var(--r-main-color);
+}
 
 .reveal ::selection {
-  color: #fff;
-  background: #a23;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal ::-moz-selection {
-  color: #fff;
-  background: #a23;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal .slides section,
 .reveal .slides section > section {
   line-height: 1.3;
-  font-weight: inherit; }
+  font-weight: inherit;
+}
 
 /*********************************************
  * HEADERS
@@ -72,224 +83,292 @@
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  margin: 0 0 20px 0;
-  color: #eee;
-  font-family: Ubuntu, "sans-serif";
-  font-weight: normal;
-  line-height: 1.2;
-  letter-spacing: normal;
-  text-transform: uppercase;
-  text-shadow: 2px 2px 2px #222;
-  word-wrap: break-word; }
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
 
 .reveal h1 {
-  font-size: 3.77em; }
+  font-size: var(--r-heading1-size);
+}
 
 .reveal h2 {
-  font-size: 2.11em; }
+  font-size: var(--r-heading2-size);
+}
 
 .reveal h3 {
-  font-size: 1.55em; }
+  font-size: var(--r-heading3-size);
+}
 
 .reveal h4 {
-  font-size: 1em; }
+  font-size: var(--r-heading4-size);
+}
 
 .reveal h1 {
-  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); }
+  text-shadow: var(--r-heading1-text-shadow);
+}
 
 /*********************************************
  * OTHER
  *********************************************/
 .reveal p {
-  margin: 20px 0;
-  line-height: 1.3; }
+  margin: var(--r-block-margin) 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,
 .reveal iframe {
   max-width: 95%;
-  max-height: 95%; }
+  max-height: 95%;
+}
 
 .reveal strong,
 .reveal b {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal em {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal ol,
 .reveal dl,
 .reveal ul {
   display: inline-block;
   text-align: left;
-  margin: 0 0 0 1em; }
+  margin: 0 0 0 1em;
+}
 
 .reveal ol {
-  list-style-type: decimal; }
+  list-style-type: decimal;
+}
 
 .reveal ul {
-  list-style-type: disc; }
+  list-style-type: disc;
+}
 
 .reveal ul ul {
-  list-style-type: square; }
+  list-style-type: square;
+}
 
 .reveal ul ul ul {
-  list-style-type: circle; }
+  list-style-type: circle;
+}
 
 .reveal ul ul,
 .reveal ul ol,
 .reveal ol ol,
 .reveal ol ul {
   display: block;
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal dt {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal dd {
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal blockquote {
   display: block;
   position: relative;
   width: 70%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   padding: 5px;
   font-style: italic;
   background: rgba(255, 255, 255, 0.05);
-  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
 
 .reveal blockquote p:first-child,
 .reveal blockquote p:last-child {
-  display: inline-block; }
+  display: inline-block;
+}
 
 .reveal q {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal pre {
   display: block;
   position: relative;
   width: 90%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   text-align: left;
   font-size: 0.55em;
-  font-family: monospace;
+  font-family: var(--r-code-font);
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
 
 .reveal code {
-  font-family: monospace;
-  text-transform: none; }
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
 
 .reveal pre code {
   display: block;
   padding: 5px;
   overflow: auto;
   max-height: 400px;
-  word-wrap: normal; }
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
 
 .reveal table {
   margin: auto;
   border-collapse: collapse;
-  border-spacing: 0; }
+  border-spacing: 0;
+}
 
 .reveal table th {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal table th,
 .reveal table td {
   text-align: left;
   padding: 0.2em 0.5em 0.2em 0.5em;
-  border-bottom: 1px solid; }
+  border-bottom: 1px solid;
+}
 
-.reveal table th[align="center"],
-.reveal table td[align="center"] {
-  text-align: center; }
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
 
-.reveal table th[align="right"],
-.reveal table td[align="right"] {
-  text-align: right; }
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
 
 .reveal table tbody tr:last-child th,
 .reveal table tbody tr:last-child td {
-  border-bottom: none; }
+  border-bottom: none;
+}
 
 .reveal sup {
   vertical-align: super;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal sub {
   vertical-align: sub;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal small {
   display: inline-block;
   font-size: 0.6em;
   line-height: 1.2em;
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal small * {
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal img {
-  margin: 20px 0; }
+  margin: var(--r-block-margin) 0;
+}
 
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
-  color: #a23;
+  color: var(--r-link-color);
   text-decoration: none;
-  transition: color .15s ease; }
+  transition: color 0.15s ease;
+}
 
 .reveal a:hover {
-  color: #dd5566;
+  color: var(--r-link-color-hover);
   text-shadow: none;
-  border: none; }
+  border: none;
+}
 
 .reveal .roll span:after {
   color: #fff;
-  background: #6a1520; }
+  background: var(--r-link-color-dark);
+}
 
 /*********************************************
  * Frame helper
  *********************************************/
 .reveal .r-frame {
-  border: 4px solid #eee;
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
 
 .reveal a .r-frame {
-  transition: all .15s linear; }
+  transition: all 0.15s linear;
+}
 
 .reveal a:hover .r-frame {
-  border-color: #a23;
-  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 .reveal .controls {
-  color: #a23; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
   background: rgba(0, 0, 0, 0.2);
-  color: #a23; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PRINT BACKGROUND
  *********************************************/
 @media print {
   .backgrounds {
-    background-color: #222; } }
-
+    background-color: var(--r-background-color);
+  }
+}
 .reveal p {
   font-weight: 300;
-  text-shadow: 1px 1px #222; }
+  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,
@@ -297,12 +376,15 @@
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  font-weight: 700; }
+  font-weight: 700;
+}
 
 .reveal p code {
   background-color: #23241f;
   display: inline-block;
-  border-radius: 7px; }
+  border-radius: 7px;
+}
 
 .reveal small code {
-  vertical-align: baseline; }
+  vertical-align: baseline;
+}

dist/theme/dracula.css

@@ -0,0 +1,383 @@
+/**
+ * Dracula Dark theme for reveal.js.
+ * Based on https://draculatheme.com
+ */
+/**
+ * Dracula colors by Zeno Rocha
+ * https://draculatheme.com/contribute
+ */
+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: #282A36;
+}
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+:root {
+  --r-background-color: #282A36;
+  --r-main-font: -apple-system, BlinkMacSystemFont, avenir next, avenir, segoe ui, helvetica neue, helvetica, Cantarell, Ubuntu, roboto, noto, arial, sans-serif;
+  --r-main-font-size: 40px;
+  --r-main-color: #F8F8F2;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: League Gothic, Impact, sans-serif;
+  --r-heading-color: #BD93F9;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: none;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: normal;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 3.77em;
+  --r-heading2-size: 2.11em;
+  --r-heading3-size: 1.55em;
+  --r-heading4-size: 1em;
+  --r-code-font: Fira Code, Menlo, Consolas, Monaco, Liberation Mono, Lucida Console, monospace;
+  --r-link-color: #FF79C6;
+  --r-link-color-dark: #ff2da5;
+  --r-link-color-hover: #8BE9FD;
+  --r-selection-background-color: #44475A;
+  --r-selection-color: #fff;
+}
+
+.reveal-viewport {
+  background: #282A36;
+  background-color: var(--r-background-color);
+}
+
+.reveal {
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
+  font-weight: normal;
+  color: var(--r-main-color);
+}
+
+.reveal ::selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal ::-moz-selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal .slides section,
+.reveal .slides section > section {
+  line-height: 1.3;
+  font-weight: inherit;
+}
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
+
+.reveal h1 {
+  font-size: var(--r-heading1-size);
+}
+
+.reveal h2 {
+  font-size: var(--r-heading2-size);
+}
+
+.reveal h3 {
+  font-size: var(--r-heading3-size);
+}
+
+.reveal h4 {
+  font-size: var(--r-heading4-size);
+}
+
+.reveal h1 {
+  text-shadow: var(--r-heading1-text-shadow);
+}
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: var(--r-block-margin) 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,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%;
+}
+
+.reveal strong,
+.reveal b {
+  font-weight: bold;
+}
+
+.reveal em {
+  font-style: italic;
+}
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em;
+}
+
+.reveal ol {
+  list-style-type: decimal;
+}
+
+.reveal ul {
+  list-style-type: disc;
+}
+
+.reveal ul ul {
+  list-style-type: square;
+}
+
+.reveal ul ul ul {
+  list-style-type: circle;
+}
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px;
+}
+
+.reveal dt {
+  font-weight: bold;
+}
+
+.reveal dd {
+  margin-left: 40px;
+}
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: var(--r-block-margin) auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block;
+}
+
+.reveal q {
+  font-style: italic;
+}
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: var(--r-block-margin) auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: var(--r-code-font);
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
+
+.reveal code {
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+.reveal table th {
+  font-weight: bold;
+}
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid;
+}
+
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
+
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none;
+}
+
+.reveal sup {
+  vertical-align: super;
+  font-size: smaller;
+}
+
+.reveal sub {
+  vertical-align: sub;
+  font-size: smaller;
+}
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top;
+}
+
+.reveal small * {
+  vertical-align: top;
+}
+
+.reveal img {
+  margin: var(--r-block-margin) 0;
+}
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: var(--r-link-color);
+  text-decoration: none;
+  transition: color 0.15s ease;
+}
+
+.reveal a:hover {
+  color: var(--r-link-color-hover);
+  text-shadow: none;
+  border: none;
+}
+
+.reveal .roll span:after {
+  color: #fff;
+  background: var(--r-link-color-dark);
+}
+
+/*********************************************
+ * Frame helper
+ *********************************************/
+.reveal .r-frame {
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
+
+.reveal a .r-frame {
+  transition: all 0.15s linear;
+}
+
+.reveal a:hover .r-frame {
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls {
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2);
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: var(--r-background-color);
+  }
+}
+:root {
+  --r-bold-color: #FFB86C;
+  --r-italic-color: #F1FA8C;
+  --r-inline-code-color: #50FA7B;
+  --r-list-bullet-color: #8BE9FD;
+}
+
+.reveal strong, .reveal b {
+  color: var(--r-bold-color);
+}
+.reveal em, .reveal i, .reveal blockquote {
+  color: var(--r-italic-color);
+}
+.reveal code {
+  color: var(--r-inline-code-color);
+}
+.reveal ul li::marker, .reveal ol li::marker {
+  color: var(--r-list-bullet-color);
+}

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

@@ -1,10 +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');
+    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

@@ -1,39 +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');
+    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');
+    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');
+    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');
+    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

@@ -5,35 +5,41 @@
  *
  * Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se
  */
-@import url(fonts/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
  *********************************************/
 :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; }
+  --r-background-color: #2b2b2b;
+  --r-main-font: Lato, sans-serif;
+  --r-main-font-size: 40px;
+  --r-main-color: #eee;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: League Gothic, Impact, sans-serif;
+  --r-heading-color: #eee;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: 0px 0px 6px rgba(0, 0, 0, 0.2);
+  --r-heading-font-weight: normal;
+  --r-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);
+  --r-heading1-size: 3.77em;
+  --r-heading2-size: 2.11em;
+  --r-heading3-size: 1.55em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #13DAEC;
+  --r-link-color-dark: #0d99a5;
+  --r-link-color-hover: #71e9f4;
+  --r-selection-background-color: #FF5E99;
+  --r-selection-color: #fff;
+}
 
 .reveal-viewport {
   background: #1c1e20;
@@ -43,28 +49,33 @@
   background: -o-radial-gradient(center, circle cover, #555a5f 0%, #1c1e20 100%);
   background: -ms-radial-gradient(center, circle cover, #555a5f 0%, #1c1e20 100%);
   background: radial-gradient(center, circle cover, #555a5f 0%, #1c1e20 100%);
-  background-color: #2b2b2b; }
+  background-color: var(--r-background-color);
+}
 
 .reveal {
-  font-family: "Lato", sans-serif;
-  font-size: 40px;
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
   font-weight: normal;
-  color: #eee; }
+  color: var(--r-main-color);
+}
 
 .reveal ::selection {
-  color: #fff;
-  background: #FF5E99;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal ::-moz-selection {
-  color: #fff;
-  background: #FF5E99;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal .slides section,
 .reveal .slides section > section {
   line-height: 1.3;
-  font-weight: inherit; }
+  font-weight: inherit;
+}
 
 /*********************************************
  * HEADERS
@@ -75,217 +86,281 @@
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  margin: 0 0 20px 0;
-  color: #eee;
-  font-family: "League Gothic", Impact, sans-serif;
-  font-weight: normal;
-  line-height: 1.2;
-  letter-spacing: normal;
-  text-transform: uppercase;
-  text-shadow: 0px 0px 6px rgba(0, 0, 0, 0.2);
-  word-wrap: break-word; }
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
 
 .reveal h1 {
-  font-size: 3.77em; }
+  font-size: var(--r-heading1-size);
+}
 
 .reveal h2 {
-  font-size: 2.11em; }
+  font-size: var(--r-heading2-size);
+}
 
 .reveal h3 {
-  font-size: 1.55em; }
+  font-size: var(--r-heading3-size);
+}
 
 .reveal h4 {
-  font-size: 1em; }
+  font-size: var(--r-heading4-size);
+}
 
 .reveal h1 {
-  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); }
+  text-shadow: var(--r-heading1-text-shadow);
+}
 
 /*********************************************
  * OTHER
  *********************************************/
 .reveal p {
-  margin: 20px 0;
-  line-height: 1.3; }
+  margin: var(--r-block-margin) 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,
 .reveal iframe {
   max-width: 95%;
-  max-height: 95%; }
+  max-height: 95%;
+}
 
 .reveal strong,
 .reveal b {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal em {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal ol,
 .reveal dl,
 .reveal ul {
   display: inline-block;
   text-align: left;
-  margin: 0 0 0 1em; }
+  margin: 0 0 0 1em;
+}
 
 .reveal ol {
-  list-style-type: decimal; }
+  list-style-type: decimal;
+}
 
 .reveal ul {
-  list-style-type: disc; }
+  list-style-type: disc;
+}
 
 .reveal ul ul {
-  list-style-type: square; }
+  list-style-type: square;
+}
 
 .reveal ul ul ul {
-  list-style-type: circle; }
+  list-style-type: circle;
+}
 
 .reveal ul ul,
 .reveal ul ol,
 .reveal ol ol,
 .reveal ol ul {
   display: block;
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal dt {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal dd {
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal blockquote {
   display: block;
   position: relative;
   width: 70%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   padding: 5px;
   font-style: italic;
   background: rgba(255, 255, 255, 0.05);
-  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
 
 .reveal blockquote p:first-child,
 .reveal blockquote p:last-child {
-  display: inline-block; }
+  display: inline-block;
+}
 
 .reveal q {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal pre {
   display: block;
   position: relative;
   width: 90%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   text-align: left;
   font-size: 0.55em;
-  font-family: monospace;
+  font-family: var(--r-code-font);
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
 
 .reveal code {
-  font-family: monospace;
-  text-transform: none; }
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
 
 .reveal pre code {
   display: block;
   padding: 5px;
   overflow: auto;
   max-height: 400px;
-  word-wrap: normal; }
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
 
 .reveal table {
   margin: auto;
   border-collapse: collapse;
-  border-spacing: 0; }
+  border-spacing: 0;
+}
 
 .reveal table th {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal table th,
 .reveal table td {
   text-align: left;
   padding: 0.2em 0.5em 0.2em 0.5em;
-  border-bottom: 1px solid; }
+  border-bottom: 1px solid;
+}
 
-.reveal table th[align="center"],
-.reveal table td[align="center"] {
-  text-align: center; }
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
 
-.reveal table th[align="right"],
-.reveal table td[align="right"] {
-  text-align: right; }
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
 
 .reveal table tbody tr:last-child th,
 .reveal table tbody tr:last-child td {
-  border-bottom: none; }
+  border-bottom: none;
+}
 
 .reveal sup {
   vertical-align: super;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal sub {
   vertical-align: sub;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal small {
   display: inline-block;
   font-size: 0.6em;
   line-height: 1.2em;
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal small * {
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal img {
-  margin: 20px 0; }
+  margin: var(--r-block-margin) 0;
+}
 
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
-  color: #13DAEC;
+  color: var(--r-link-color);
   text-decoration: none;
-  transition: color .15s ease; }
+  transition: color 0.15s ease;
+}
 
 .reveal a:hover {
-  color: #71e9f4;
+  color: var(--r-link-color-hover);
   text-shadow: none;
-  border: none; }
+  border: none;
+}
 
 .reveal .roll span:after {
   color: #fff;
-  background: #0d99a5; }
+  background: var(--r-link-color-dark);
+}
 
 /*********************************************
  * Frame helper
  *********************************************/
 .reveal .r-frame {
-  border: 4px solid #eee;
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
 
 .reveal a .r-frame {
-  transition: all .15s linear; }
+  transition: all 0.15s linear;
+}
 
 .reveal a:hover .r-frame {
-  border-color: #13DAEC;
-  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 .reveal .controls {
-  color: #13DAEC; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
   background: rgba(0, 0, 0, 0.2);
-  color: #13DAEC; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PRINT BACKGROUND
  *********************************************/
 @media print {
   .backgrounds {
-    background-color: #2b2b2b; } }
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/moon.css

@@ -2,67 +2,79 @@
  * Solarized Dark theme for reveal.js.
  * Author: Achim Staebler
  */
-@import url(fonts/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
  */
 html * {
   color-profile: sRGB;
-  rendering-intent: auto; }
+  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
  *********************************************/
 :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; }
+  --r-background-color: #002b36;
+  --r-main-font: Lato, sans-serif;
+  --r-main-font-size: 40px;
+  --r-main-color: #93a1a1;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: League Gothic, Impact, sans-serif;
+  --r-heading-color: #eee8d5;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: normal;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 3.77em;
+  --r-heading2-size: 2.11em;
+  --r-heading3-size: 1.55em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #268bd2;
+  --r-link-color-dark: #1a6091;
+  --r-link-color-hover: #78b9e6;
+  --r-selection-background-color: #d33682;
+  --r-selection-color: #fff;
+}
 
 .reveal-viewport {
   background: #002b36;
-  background-color: #002b36; }
+  background-color: var(--r-background-color);
+}
 
 .reveal {
-  font-family: "Lato", sans-serif;
-  font-size: 40px;
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
   font-weight: normal;
-  color: #93a1a1; }
+  color: var(--r-main-color);
+}
 
 .reveal ::selection {
-  color: #fff;
-  background: #d33682;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal ::-moz-selection {
-  color: #fff;
-  background: #d33682;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal .slides section,
 .reveal .slides section > section {
   line-height: 1.3;
-  font-weight: inherit; }
+  font-weight: inherit;
+}
 
 /*********************************************
  * HEADERS
@@ -73,217 +85,281 @@ html * {
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  margin: 0 0 20px 0;
-  color: #eee8d5;
-  font-family: "League Gothic", Impact, sans-serif;
-  font-weight: normal;
-  line-height: 1.2;
-  letter-spacing: normal;
-  text-transform: uppercase;
-  text-shadow: none;
-  word-wrap: break-word; }
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
 
 .reveal h1 {
-  font-size: 3.77em; }
+  font-size: var(--r-heading1-size);
+}
 
 .reveal h2 {
-  font-size: 2.11em; }
+  font-size: var(--r-heading2-size);
+}
 
 .reveal h3 {
-  font-size: 1.55em; }
+  font-size: var(--r-heading3-size);
+}
 
 .reveal h4 {
-  font-size: 1em; }
+  font-size: var(--r-heading4-size);
+}
 
 .reveal h1 {
-  text-shadow: none; }
+  text-shadow: var(--r-heading1-text-shadow);
+}
 
 /*********************************************
  * OTHER
  *********************************************/
 .reveal p {
-  margin: 20px 0;
-  line-height: 1.3; }
+  margin: var(--r-block-margin) 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,
 .reveal iframe {
   max-width: 95%;
-  max-height: 95%; }
+  max-height: 95%;
+}
 
 .reveal strong,
 .reveal b {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal em {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal ol,
 .reveal dl,
 .reveal ul {
   display: inline-block;
   text-align: left;
-  margin: 0 0 0 1em; }
+  margin: 0 0 0 1em;
+}
 
 .reveal ol {
-  list-style-type: decimal; }
+  list-style-type: decimal;
+}
 
 .reveal ul {
-  list-style-type: disc; }
+  list-style-type: disc;
+}
 
 .reveal ul ul {
-  list-style-type: square; }
+  list-style-type: square;
+}
 
 .reveal ul ul ul {
-  list-style-type: circle; }
+  list-style-type: circle;
+}
 
 .reveal ul ul,
 .reveal ul ol,
 .reveal ol ol,
 .reveal ol ul {
   display: block;
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal dt {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal dd {
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal blockquote {
   display: block;
   position: relative;
   width: 70%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   padding: 5px;
   font-style: italic;
   background: rgba(255, 255, 255, 0.05);
-  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
 
 .reveal blockquote p:first-child,
 .reveal blockquote p:last-child {
-  display: inline-block; }
+  display: inline-block;
+}
 
 .reveal q {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal pre {
   display: block;
   position: relative;
   width: 90%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   text-align: left;
   font-size: 0.55em;
-  font-family: monospace;
+  font-family: var(--r-code-font);
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
 
 .reveal code {
-  font-family: monospace;
-  text-transform: none; }
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
 
 .reveal pre code {
   display: block;
   padding: 5px;
   overflow: auto;
   max-height: 400px;
-  word-wrap: normal; }
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
 
 .reveal table {
   margin: auto;
   border-collapse: collapse;
-  border-spacing: 0; }
+  border-spacing: 0;
+}
 
 .reveal table th {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal table th,
 .reveal table td {
   text-align: left;
   padding: 0.2em 0.5em 0.2em 0.5em;
-  border-bottom: 1px solid; }
+  border-bottom: 1px solid;
+}
 
-.reveal table th[align="center"],
-.reveal table td[align="center"] {
-  text-align: center; }
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
 
-.reveal table th[align="right"],
-.reveal table td[align="right"] {
-  text-align: right; }
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
 
 .reveal table tbody tr:last-child th,
 .reveal table tbody tr:last-child td {
-  border-bottom: none; }
+  border-bottom: none;
+}
 
 .reveal sup {
   vertical-align: super;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal sub {
   vertical-align: sub;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal small {
   display: inline-block;
   font-size: 0.6em;
   line-height: 1.2em;
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal small * {
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal img {
-  margin: 20px 0; }
+  margin: var(--r-block-margin) 0;
+}
 
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
-  color: #268bd2;
+  color: var(--r-link-color);
   text-decoration: none;
-  transition: color .15s ease; }
+  transition: color 0.15s ease;
+}
 
 .reveal a:hover {
-  color: #78b9e6;
+  color: var(--r-link-color-hover);
   text-shadow: none;
-  border: none; }
+  border: none;
+}
 
 .reveal .roll span:after {
   color: #fff;
-  background: #1a6091; }
+  background: var(--r-link-color-dark);
+}
 
 /*********************************************
  * Frame helper
  *********************************************/
 .reveal .r-frame {
-  border: 4px solid #93a1a1;
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
 
 .reveal a .r-frame {
-  transition: all .15s linear; }
+  transition: all 0.15s linear;
+}
 
 .reveal a:hover .r-frame {
-  border-color: #268bd2;
-  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 .reveal .controls {
-  color: #268bd2; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
   background: rgba(0, 0, 0, 0.2);
-  color: #268bd2; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PRINT BACKGROUND
  *********************************************/
 @media print {
   .backgrounds {
-    background-color: #002b36; } }
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/night.css

@@ -5,58 +5,69 @@
  */
 @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
  *********************************************/
 :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; }
+  --r-background-color: #111;
+  --r-main-font: Open Sans, sans-serif;
+  --r-main-font-size: 40px;
+  --r-main-color: #eee;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Montserrat, Impact, sans-serif;
+  --r-heading-color: #eee;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: -0.03em;
+  --r-heading-text-transform: none;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: normal;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 3.77em;
+  --r-heading2-size: 2.11em;
+  --r-heading3-size: 1.55em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #e7ad52;
+  --r-link-color-dark: #d08a1d;
+  --r-link-color-hover: #f3d7ac;
+  --r-selection-background-color: #e7ad52;
+  --r-selection-color: #fff;
+}
 
 .reveal-viewport {
   background: #111;
-  background-color: #111; }
+  background-color: var(--r-background-color);
+}
 
 .reveal {
-  font-family: "Open Sans", sans-serif;
-  font-size: 40px;
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
   font-weight: normal;
-  color: #eee; }
+  color: var(--r-main-color);
+}
 
 .reveal ::selection {
-  color: #fff;
-  background: #e7ad52;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal ::-moz-selection {
-  color: #fff;
-  background: #e7ad52;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal .slides section,
 .reveal .slides section > section {
   line-height: 1.3;
-  font-weight: inherit; }
+  font-weight: inherit;
+}
 
 /*********************************************
  * HEADERS
@@ -67,217 +78,281 @@
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  margin: 0 0 20px 0;
-  color: #eee;
-  font-family: "Montserrat", Impact, sans-serif;
-  font-weight: normal;
-  line-height: 1.2;
-  letter-spacing: -0.03em;
-  text-transform: none;
-  text-shadow: none;
-  word-wrap: break-word; }
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
 
 .reveal h1 {
-  font-size: 3.77em; }
+  font-size: var(--r-heading1-size);
+}
 
 .reveal h2 {
-  font-size: 2.11em; }
+  font-size: var(--r-heading2-size);
+}
 
 .reveal h3 {
-  font-size: 1.55em; }
+  font-size: var(--r-heading3-size);
+}
 
 .reveal h4 {
-  font-size: 1em; }
+  font-size: var(--r-heading4-size);
+}
 
 .reveal h1 {
-  text-shadow: none; }
+  text-shadow: var(--r-heading1-text-shadow);
+}
 
 /*********************************************
  * OTHER
  *********************************************/
 .reveal p {
-  margin: 20px 0;
-  line-height: 1.3; }
+  margin: var(--r-block-margin) 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,
 .reveal iframe {
   max-width: 95%;
-  max-height: 95%; }
+  max-height: 95%;
+}
 
 .reveal strong,
 .reveal b {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal em {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal ol,
 .reveal dl,
 .reveal ul {
   display: inline-block;
   text-align: left;
-  margin: 0 0 0 1em; }
+  margin: 0 0 0 1em;
+}
 
 .reveal ol {
-  list-style-type: decimal; }
+  list-style-type: decimal;
+}
 
 .reveal ul {
-  list-style-type: disc; }
+  list-style-type: disc;
+}
 
 .reveal ul ul {
-  list-style-type: square; }
+  list-style-type: square;
+}
 
 .reveal ul ul ul {
-  list-style-type: circle; }
+  list-style-type: circle;
+}
 
 .reveal ul ul,
 .reveal ul ol,
 .reveal ol ol,
 .reveal ol ul {
   display: block;
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal dt {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal dd {
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal blockquote {
   display: block;
   position: relative;
   width: 70%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   padding: 5px;
   font-style: italic;
   background: rgba(255, 255, 255, 0.05);
-  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
 
 .reveal blockquote p:first-child,
 .reveal blockquote p:last-child {
-  display: inline-block; }
+  display: inline-block;
+}
 
 .reveal q {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal pre {
   display: block;
   position: relative;
   width: 90%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   text-align: left;
   font-size: 0.55em;
-  font-family: monospace;
+  font-family: var(--r-code-font);
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
 
 .reveal code {
-  font-family: monospace;
-  text-transform: none; }
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
 
 .reveal pre code {
   display: block;
   padding: 5px;
   overflow: auto;
   max-height: 400px;
-  word-wrap: normal; }
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
 
 .reveal table {
   margin: auto;
   border-collapse: collapse;
-  border-spacing: 0; }
+  border-spacing: 0;
+}
 
 .reveal table th {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal table th,
 .reveal table td {
   text-align: left;
   padding: 0.2em 0.5em 0.2em 0.5em;
-  border-bottom: 1px solid; }
+  border-bottom: 1px solid;
+}
 
-.reveal table th[align="center"],
-.reveal table td[align="center"] {
-  text-align: center; }
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
 
-.reveal table th[align="right"],
-.reveal table td[align="right"] {
-  text-align: right; }
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
 
 .reveal table tbody tr:last-child th,
 .reveal table tbody tr:last-child td {
-  border-bottom: none; }
+  border-bottom: none;
+}
 
 .reveal sup {
   vertical-align: super;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal sub {
   vertical-align: sub;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal small {
   display: inline-block;
   font-size: 0.6em;
   line-height: 1.2em;
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal small * {
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal img {
-  margin: 20px 0; }
+  margin: var(--r-block-margin) 0;
+}
 
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
-  color: #e7ad52;
+  color: var(--r-link-color);
   text-decoration: none;
-  transition: color .15s ease; }
+  transition: color 0.15s ease;
+}
 
 .reveal a:hover {
-  color: #f3d7ac;
+  color: var(--r-link-color-hover);
   text-shadow: none;
-  border: none; }
+  border: none;
+}
 
 .reveal .roll span:after {
   color: #fff;
-  background: #d08a1d; }
+  background: var(--r-link-color-dark);
+}
 
 /*********************************************
  * Frame helper
  *********************************************/
 .reveal .r-frame {
-  border: 4px solid #eee;
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
 
 .reveal a .r-frame {
-  transition: all .15s linear; }
+  transition: all 0.15s linear;
+}
 
 .reveal a:hover .r-frame {
-  border-color: #e7ad52;
-  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 .reveal .controls {
-  color: #e7ad52; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
   background: rgba(0, 0, 0, 0.2);
-  color: #e7ad52; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PRINT BACKGROUND
  *********************************************/
 @media print {
   .backgrounds {
-    background-color: #111; } }
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/serif.css

@@ -5,60 +5,72 @@
  * This theme is Copyright (C) 2012-2013 Owen Versteeg, http://owenversteeg.com - it is MIT licensed.
  */
 .reveal a {
-  line-height: 1.3em; }
+  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
  *********************************************/
 :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; }
+  --r-background-color: #F0F1EB;
+  --r-main-font: Palatino Linotype, Book Antiqua, Palatino, FreeSerif, serif;
+  --r-main-font-size: 40px;
+  --r-main-color: #000;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Palatino Linotype, Book Antiqua, Palatino, FreeSerif, serif;
+  --r-heading-color: #383D3D;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: none;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: normal;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 3.77em;
+  --r-heading2-size: 2.11em;
+  --r-heading3-size: 1.55em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #51483D;
+  --r-link-color-dark: #25211c;
+  --r-link-color-hover: #8b7c69;
+  --r-selection-background-color: #26351C;
+  --r-selection-color: #fff;
+}
 
 .reveal-viewport {
   background: #F0F1EB;
-  background-color: #F0F1EB; }
+  background-color: var(--r-background-color);
+}
 
 .reveal {
-  font-family: "Palatino Linotype", "Book Antiqua", Palatino, FreeSerif, serif;
-  font-size: 40px;
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
   font-weight: normal;
-  color: #000; }
+  color: var(--r-main-color);
+}
 
 .reveal ::selection {
-  color: #fff;
-  background: #26351C;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal ::-moz-selection {
-  color: #fff;
-  background: #26351C;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal .slides section,
 .reveal .slides section > section {
   line-height: 1.3;
-  font-weight: inherit; }
+  font-weight: inherit;
+}
 
 /*********************************************
  * HEADERS
@@ -69,217 +81,281 @@
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  margin: 0 0 20px 0;
-  color: #383D3D;
-  font-family: "Palatino Linotype", "Book Antiqua", Palatino, FreeSerif, serif;
-  font-weight: normal;
-  line-height: 1.2;
-  letter-spacing: normal;
-  text-transform: none;
-  text-shadow: none;
-  word-wrap: break-word; }
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
 
 .reveal h1 {
-  font-size: 3.77em; }
+  font-size: var(--r-heading1-size);
+}
 
 .reveal h2 {
-  font-size: 2.11em; }
+  font-size: var(--r-heading2-size);
+}
 
 .reveal h3 {
-  font-size: 1.55em; }
+  font-size: var(--r-heading3-size);
+}
 
 .reveal h4 {
-  font-size: 1em; }
+  font-size: var(--r-heading4-size);
+}
 
 .reveal h1 {
-  text-shadow: none; }
+  text-shadow: var(--r-heading1-text-shadow);
+}
 
 /*********************************************
  * OTHER
  *********************************************/
 .reveal p {
-  margin: 20px 0;
-  line-height: 1.3; }
+  margin: var(--r-block-margin) 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,
 .reveal iframe {
   max-width: 95%;
-  max-height: 95%; }
+  max-height: 95%;
+}
 
 .reveal strong,
 .reveal b {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal em {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal ol,
 .reveal dl,
 .reveal ul {
   display: inline-block;
   text-align: left;
-  margin: 0 0 0 1em; }
+  margin: 0 0 0 1em;
+}
 
 .reveal ol {
-  list-style-type: decimal; }
+  list-style-type: decimal;
+}
 
 .reveal ul {
-  list-style-type: disc; }
+  list-style-type: disc;
+}
 
 .reveal ul ul {
-  list-style-type: square; }
+  list-style-type: square;
+}
 
 .reveal ul ul ul {
-  list-style-type: circle; }
+  list-style-type: circle;
+}
 
 .reveal ul ul,
 .reveal ul ol,
 .reveal ol ol,
 .reveal ol ul {
   display: block;
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal dt {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal dd {
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal blockquote {
   display: block;
   position: relative;
   width: 70%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   padding: 5px;
   font-style: italic;
   background: rgba(255, 255, 255, 0.05);
-  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
 
 .reveal blockquote p:first-child,
 .reveal blockquote p:last-child {
-  display: inline-block; }
+  display: inline-block;
+}
 
 .reveal q {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal pre {
   display: block;
   position: relative;
   width: 90%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   text-align: left;
   font-size: 0.55em;
-  font-family: monospace;
+  font-family: var(--r-code-font);
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
 
 .reveal code {
-  font-family: monospace;
-  text-transform: none; }
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
 
 .reveal pre code {
   display: block;
   padding: 5px;
   overflow: auto;
   max-height: 400px;
-  word-wrap: normal; }
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
 
 .reveal table {
   margin: auto;
   border-collapse: collapse;
-  border-spacing: 0; }
+  border-spacing: 0;
+}
 
 .reveal table th {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal table th,
 .reveal table td {
   text-align: left;
   padding: 0.2em 0.5em 0.2em 0.5em;
-  border-bottom: 1px solid; }
+  border-bottom: 1px solid;
+}
 
-.reveal table th[align="center"],
-.reveal table td[align="center"] {
-  text-align: center; }
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
 
-.reveal table th[align="right"],
-.reveal table td[align="right"] {
-  text-align: right; }
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
 
 .reveal table tbody tr:last-child th,
 .reveal table tbody tr:last-child td {
-  border-bottom: none; }
+  border-bottom: none;
+}
 
 .reveal sup {
   vertical-align: super;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal sub {
   vertical-align: sub;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal small {
   display: inline-block;
   font-size: 0.6em;
   line-height: 1.2em;
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal small * {
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal img {
-  margin: 20px 0; }
+  margin: var(--r-block-margin) 0;
+}
 
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
-  color: #51483D;
+  color: var(--r-link-color);
   text-decoration: none;
-  transition: color .15s ease; }
+  transition: color 0.15s ease;
+}
 
 .reveal a:hover {
-  color: #8b7c69;
+  color: var(--r-link-color-hover);
   text-shadow: none;
-  border: none; }
+  border: none;
+}
 
 .reveal .roll span:after {
   color: #fff;
-  background: #25211c; }
+  background: var(--r-link-color-dark);
+}
 
 /*********************************************
  * Frame helper
  *********************************************/
 .reveal .r-frame {
-  border: 4px solid #000;
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
 
 .reveal a .r-frame {
-  transition: all .15s linear; }
+  transition: all 0.15s linear;
+}
 
 .reveal a:hover .r-frame {
-  border-color: #51483D;
-  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 .reveal .controls {
-  color: #51483D; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
   background: rgba(0, 0, 0, 0.2);
-  color: #51483D; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PRINT BACKGROUND
  *********************************************/
 @media print {
   .backgrounds {
-    background-color: #F0F1EB; } }
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/simple.css

@@ -8,60 +8,68 @@
 @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; }
+  color: #fff;
+}
 
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
 :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; }
+  --r-background-color: #fff;
+  --r-main-font: Lato, sans-serif;
+  --r-main-font-size: 40px;
+  --r-main-color: #000;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: News Cycle, Impact, sans-serif;
+  --r-heading-color: #000;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: none;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: normal;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 3.77em;
+  --r-heading2-size: 2.11em;
+  --r-heading3-size: 1.55em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #00008B;
+  --r-link-color-dark: #00003f;
+  --r-link-color-hover: #0000f1;
+  --r-selection-background-color: rgba(0, 0, 0, 0.99);
+  --r-selection-color: #fff;
+}
 
 .reveal-viewport {
   background: #fff;
-  background-color: #fff; }
+  background-color: var(--r-background-color);
+}
 
 .reveal {
-  font-family: "Lato", sans-serif;
-  font-size: 40px;
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
   font-weight: normal;
-  color: #000; }
+  color: var(--r-main-color);
+}
 
 .reveal ::selection {
-  color: #fff;
-  background: rgba(0, 0, 0, 0.99);
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal ::-moz-selection {
-  color: #fff;
-  background: rgba(0, 0, 0, 0.99);
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal .slides section,
 .reveal .slides section > section {
   line-height: 1.3;
-  font-weight: inherit; }
+  font-weight: inherit;
+}
 
 /*********************************************
  * HEADERS
@@ -72,217 +80,281 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  margin: 0 0 20px 0;
-  color: #000;
-  font-family: "News Cycle", Impact, sans-serif;
-  font-weight: normal;
-  line-height: 1.2;
-  letter-spacing: normal;
-  text-transform: none;
-  text-shadow: none;
-  word-wrap: break-word; }
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
 
 .reveal h1 {
-  font-size: 3.77em; }
+  font-size: var(--r-heading1-size);
+}
 
 .reveal h2 {
-  font-size: 2.11em; }
+  font-size: var(--r-heading2-size);
+}
 
 .reveal h3 {
-  font-size: 1.55em; }
+  font-size: var(--r-heading3-size);
+}
 
 .reveal h4 {
-  font-size: 1em; }
+  font-size: var(--r-heading4-size);
+}
 
 .reveal h1 {
-  text-shadow: none; }
+  text-shadow: var(--r-heading1-text-shadow);
+}
 
 /*********************************************
  * OTHER
  *********************************************/
 .reveal p {
-  margin: 20px 0;
-  line-height: 1.3; }
+  margin: var(--r-block-margin) 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,
 .reveal iframe {
   max-width: 95%;
-  max-height: 95%; }
+  max-height: 95%;
+}
 
 .reveal strong,
 .reveal b {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal em {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal ol,
 .reveal dl,
 .reveal ul {
   display: inline-block;
   text-align: left;
-  margin: 0 0 0 1em; }
+  margin: 0 0 0 1em;
+}
 
 .reveal ol {
-  list-style-type: decimal; }
+  list-style-type: decimal;
+}
 
 .reveal ul {
-  list-style-type: disc; }
+  list-style-type: disc;
+}
 
 .reveal ul ul {
-  list-style-type: square; }
+  list-style-type: square;
+}
 
 .reveal ul ul ul {
-  list-style-type: circle; }
+  list-style-type: circle;
+}
 
 .reveal ul ul,
 .reveal ul ol,
 .reveal ol ol,
 .reveal ol ul {
   display: block;
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal dt {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal dd {
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal blockquote {
   display: block;
   position: relative;
   width: 70%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   padding: 5px;
   font-style: italic;
   background: rgba(255, 255, 255, 0.05);
-  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
 
 .reveal blockquote p:first-child,
 .reveal blockquote p:last-child {
-  display: inline-block; }
+  display: inline-block;
+}
 
 .reveal q {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal pre {
   display: block;
   position: relative;
   width: 90%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   text-align: left;
   font-size: 0.55em;
-  font-family: monospace;
+  font-family: var(--r-code-font);
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
 
 .reveal code {
-  font-family: monospace;
-  text-transform: none; }
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
 
 .reveal pre code {
   display: block;
   padding: 5px;
   overflow: auto;
   max-height: 400px;
-  word-wrap: normal; }
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
 
 .reveal table {
   margin: auto;
   border-collapse: collapse;
-  border-spacing: 0; }
+  border-spacing: 0;
+}
 
 .reveal table th {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal table th,
 .reveal table td {
   text-align: left;
   padding: 0.2em 0.5em 0.2em 0.5em;
-  border-bottom: 1px solid; }
+  border-bottom: 1px solid;
+}
 
-.reveal table th[align="center"],
-.reveal table td[align="center"] {
-  text-align: center; }
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
 
-.reveal table th[align="right"],
-.reveal table td[align="right"] {
-  text-align: right; }
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
 
 .reveal table tbody tr:last-child th,
 .reveal table tbody tr:last-child td {
-  border-bottom: none; }
+  border-bottom: none;
+}
 
 .reveal sup {
   vertical-align: super;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal sub {
   vertical-align: sub;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal small {
   display: inline-block;
   font-size: 0.6em;
   line-height: 1.2em;
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal small * {
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal img {
-  margin: 20px 0; }
+  margin: var(--r-block-margin) 0;
+}
 
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
-  color: #00008B;
+  color: var(--r-link-color);
   text-decoration: none;
-  transition: color .15s ease; }
+  transition: color 0.15s ease;
+}
 
 .reveal a:hover {
-  color: #0000f1;
+  color: var(--r-link-color-hover);
   text-shadow: none;
-  border: none; }
+  border: none;
+}
 
 .reveal .roll span:after {
   color: #fff;
-  background: #00003f; }
+  background: var(--r-link-color-dark);
+}
 
 /*********************************************
  * Frame helper
  *********************************************/
 .reveal .r-frame {
-  border: 4px solid #000;
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
 
 .reveal a .r-frame {
-  transition: all .15s linear; }
+  transition: all 0.15s linear;
+}
 
 .reveal a:hover .r-frame {
-  border-color: #00008B;
-  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 .reveal .controls {
-  color: #00008B; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
   background: rgba(0, 0, 0, 0.2);
-  color: #00008B; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PRINT BACKGROUND
  *********************************************/
 @media print {
   .backgrounds {
-    background-color: #fff; } }
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/sky.css

@@ -6,35 +6,42 @@
 @import url(https://fonts.googleapis.com/css?family=Quicksand:400,700,400italic,700italic);
 @import url(https://fonts.googleapis.com/css?family=Open+Sans:400italic,700italic,400,700);
 .reveal a {
-  line-height: 1.3em; }
+  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
  *********************************************/
 :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; }
+  --r-background-color: #f7fbfc;
+  --r-main-font: Open Sans, sans-serif;
+  --r-main-font-size: 40px;
+  --r-main-color: #333;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Quicksand, sans-serif;
+  --r-heading-color: #333;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: -0.08em;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: normal;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 3.77em;
+  --r-heading2-size: 2.11em;
+  --r-heading3-size: 1.55em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #3b759e;
+  --r-link-color-dark: #264c66;
+  --r-link-color-hover: #74a7cb;
+  --r-selection-background-color: #134674;
+  --r-selection-color: #fff;
+}
 
 .reveal-viewport {
   background: #add9e4;
@@ -44,28 +51,33 @@
   background: -o-radial-gradient(center, circle cover, #f7fbfc 0%, #add9e4 100%);
   background: -ms-radial-gradient(center, circle cover, #f7fbfc 0%, #add9e4 100%);
   background: radial-gradient(center, circle cover, #f7fbfc 0%, #add9e4 100%);
-  background-color: #f7fbfc; }
+  background-color: var(--r-background-color);
+}
 
 .reveal {
-  font-family: "Open Sans", sans-serif;
-  font-size: 40px;
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
   font-weight: normal;
-  color: #333; }
+  color: var(--r-main-color);
+}
 
 .reveal ::selection {
-  color: #fff;
-  background: #134674;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal ::-moz-selection {
-  color: #fff;
-  background: #134674;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal .slides section,
 .reveal .slides section > section {
   line-height: 1.3;
-  font-weight: inherit; }
+  font-weight: inherit;
+}
 
 /*********************************************
  * HEADERS
@@ -76,217 +88,281 @@
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  margin: 0 0 20px 0;
-  color: #333;
-  font-family: "Quicksand", sans-serif;
-  font-weight: normal;
-  line-height: 1.2;
-  letter-spacing: -0.08em;
-  text-transform: uppercase;
-  text-shadow: none;
-  word-wrap: break-word; }
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
 
 .reveal h1 {
-  font-size: 3.77em; }
+  font-size: var(--r-heading1-size);
+}
 
 .reveal h2 {
-  font-size: 2.11em; }
+  font-size: var(--r-heading2-size);
+}
 
 .reveal h3 {
-  font-size: 1.55em; }
+  font-size: var(--r-heading3-size);
+}
 
 .reveal h4 {
-  font-size: 1em; }
+  font-size: var(--r-heading4-size);
+}
 
 .reveal h1 {
-  text-shadow: none; }
+  text-shadow: var(--r-heading1-text-shadow);
+}
 
 /*********************************************
  * OTHER
  *********************************************/
 .reveal p {
-  margin: 20px 0;
-  line-height: 1.3; }
+  margin: var(--r-block-margin) 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,
 .reveal iframe {
   max-width: 95%;
-  max-height: 95%; }
+  max-height: 95%;
+}
 
 .reveal strong,
 .reveal b {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal em {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal ol,
 .reveal dl,
 .reveal ul {
   display: inline-block;
   text-align: left;
-  margin: 0 0 0 1em; }
+  margin: 0 0 0 1em;
+}
 
 .reveal ol {
-  list-style-type: decimal; }
+  list-style-type: decimal;
+}
 
 .reveal ul {
-  list-style-type: disc; }
+  list-style-type: disc;
+}
 
 .reveal ul ul {
-  list-style-type: square; }
+  list-style-type: square;
+}
 
 .reveal ul ul ul {
-  list-style-type: circle; }
+  list-style-type: circle;
+}
 
 .reveal ul ul,
 .reveal ul ol,
 .reveal ol ol,
 .reveal ol ul {
   display: block;
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal dt {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal dd {
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal blockquote {
   display: block;
   position: relative;
   width: 70%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   padding: 5px;
   font-style: italic;
   background: rgba(255, 255, 255, 0.05);
-  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
 
 .reveal blockquote p:first-child,
 .reveal blockquote p:last-child {
-  display: inline-block; }
+  display: inline-block;
+}
 
 .reveal q {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal pre {
   display: block;
   position: relative;
   width: 90%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   text-align: left;
   font-size: 0.55em;
-  font-family: monospace;
+  font-family: var(--r-code-font);
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
 
 .reveal code {
-  font-family: monospace;
-  text-transform: none; }
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
 
 .reveal pre code {
   display: block;
   padding: 5px;
   overflow: auto;
   max-height: 400px;
-  word-wrap: normal; }
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
 
 .reveal table {
   margin: auto;
   border-collapse: collapse;
-  border-spacing: 0; }
+  border-spacing: 0;
+}
 
 .reveal table th {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal table th,
 .reveal table td {
   text-align: left;
   padding: 0.2em 0.5em 0.2em 0.5em;
-  border-bottom: 1px solid; }
+  border-bottom: 1px solid;
+}
 
-.reveal table th[align="center"],
-.reveal table td[align="center"] {
-  text-align: center; }
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
 
-.reveal table th[align="right"],
-.reveal table td[align="right"] {
-  text-align: right; }
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
 
 .reveal table tbody tr:last-child th,
 .reveal table tbody tr:last-child td {
-  border-bottom: none; }
+  border-bottom: none;
+}
 
 .reveal sup {
   vertical-align: super;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal sub {
   vertical-align: sub;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal small {
   display: inline-block;
   font-size: 0.6em;
   line-height: 1.2em;
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal small * {
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal img {
-  margin: 20px 0; }
+  margin: var(--r-block-margin) 0;
+}
 
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
-  color: #3b759e;
+  color: var(--r-link-color);
   text-decoration: none;
-  transition: color .15s ease; }
+  transition: color 0.15s ease;
+}
 
 .reveal a:hover {
-  color: #74a7cb;
+  color: var(--r-link-color-hover);
   text-shadow: none;
-  border: none; }
+  border: none;
+}
 
 .reveal .roll span:after {
   color: #fff;
-  background: #264c66; }
+  background: var(--r-link-color-dark);
+}
 
 /*********************************************
  * Frame helper
  *********************************************/
 .reveal .r-frame {
-  border: 4px solid #333;
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
 
 .reveal a .r-frame {
-  transition: all .15s linear; }
+  transition: all 0.15s linear;
+}
 
 .reveal a:hover .r-frame {
-  border-color: #3b759e;
-  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 .reveal .controls {
-  color: #3b759e; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
   background: rgba(0, 0, 0, 0.2);
-  color: #3b759e; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PRINT BACKGROUND
  *********************************************/
 @media print {
   .backgrounds {
-    background-color: #f7fbfc; } }
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/solarized.css

@@ -2,67 +2,75 @@
  * Solarized Light theme for reveal.js.
  * Author: Achim Staebler
  */
-@import url(fonts/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
  */
 html * {
   color-profile: sRGB;
-  rendering-intent: auto; }
+  rendering-intent: auto;
+}
 
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
 :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; }
+  --r-background-color: #fdf6e3;
+  --r-main-font: Lato, sans-serif;
+  --r-main-font-size: 40px;
+  --r-main-color: #657b83;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: League Gothic, Impact, sans-serif;
+  --r-heading-color: #586e75;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: normal;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 3.77em;
+  --r-heading2-size: 2.11em;
+  --r-heading3-size: 1.55em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #268bd2;
+  --r-link-color-dark: #1a6091;
+  --r-link-color-hover: #78b9e6;
+  --r-selection-background-color: #d33682;
+  --r-selection-color: #fff;
+}
 
 .reveal-viewport {
   background: #fdf6e3;
-  background-color: #fdf6e3; }
+  background-color: var(--r-background-color);
+}
 
 .reveal {
-  font-family: "Lato", sans-serif;
-  font-size: 40px;
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
   font-weight: normal;
-  color: #657b83; }
+  color: var(--r-main-color);
+}
 
 .reveal ::selection {
-  color: #fff;
-  background: #d33682;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal ::-moz-selection {
-  color: #fff;
-  background: #d33682;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal .slides section,
 .reveal .slides section > section {
   line-height: 1.3;
-  font-weight: inherit; }
+  font-weight: inherit;
+}
 
 /*********************************************
  * HEADERS
@@ -73,217 +81,281 @@ html * {
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  margin: 0 0 20px 0;
-  color: #586e75;
-  font-family: "League Gothic", Impact, sans-serif;
-  font-weight: normal;
-  line-height: 1.2;
-  letter-spacing: normal;
-  text-transform: uppercase;
-  text-shadow: none;
-  word-wrap: break-word; }
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
 
 .reveal h1 {
-  font-size: 3.77em; }
+  font-size: var(--r-heading1-size);
+}
 
 .reveal h2 {
-  font-size: 2.11em; }
+  font-size: var(--r-heading2-size);
+}
 
 .reveal h3 {
-  font-size: 1.55em; }
+  font-size: var(--r-heading3-size);
+}
 
 .reveal h4 {
-  font-size: 1em; }
+  font-size: var(--r-heading4-size);
+}
 
 .reveal h1 {
-  text-shadow: none; }
+  text-shadow: var(--r-heading1-text-shadow);
+}
 
 /*********************************************
  * OTHER
  *********************************************/
 .reveal p {
-  margin: 20px 0;
-  line-height: 1.3; }
+  margin: var(--r-block-margin) 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,
 .reveal iframe {
   max-width: 95%;
-  max-height: 95%; }
+  max-height: 95%;
+}
 
 .reveal strong,
 .reveal b {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal em {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal ol,
 .reveal dl,
 .reveal ul {
   display: inline-block;
   text-align: left;
-  margin: 0 0 0 1em; }
+  margin: 0 0 0 1em;
+}
 
 .reveal ol {
-  list-style-type: decimal; }
+  list-style-type: decimal;
+}
 
 .reveal ul {
-  list-style-type: disc; }
+  list-style-type: disc;
+}
 
 .reveal ul ul {
-  list-style-type: square; }
+  list-style-type: square;
+}
 
 .reveal ul ul ul {
-  list-style-type: circle; }
+  list-style-type: circle;
+}
 
 .reveal ul ul,
 .reveal ul ol,
 .reveal ol ol,
 .reveal ol ul {
   display: block;
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal dt {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal dd {
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal blockquote {
   display: block;
   position: relative;
   width: 70%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   padding: 5px;
   font-style: italic;
   background: rgba(255, 255, 255, 0.05);
-  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
 
 .reveal blockquote p:first-child,
 .reveal blockquote p:last-child {
-  display: inline-block; }
+  display: inline-block;
+}
 
 .reveal q {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal pre {
   display: block;
   position: relative;
   width: 90%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   text-align: left;
   font-size: 0.55em;
-  font-family: monospace;
+  font-family: var(--r-code-font);
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
 
 .reveal code {
-  font-family: monospace;
-  text-transform: none; }
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
 
 .reveal pre code {
   display: block;
   padding: 5px;
   overflow: auto;
   max-height: 400px;
-  word-wrap: normal; }
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
 
 .reveal table {
   margin: auto;
   border-collapse: collapse;
-  border-spacing: 0; }
+  border-spacing: 0;
+}
 
 .reveal table th {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal table th,
 .reveal table td {
   text-align: left;
   padding: 0.2em 0.5em 0.2em 0.5em;
-  border-bottom: 1px solid; }
+  border-bottom: 1px solid;
+}
 
-.reveal table th[align="center"],
-.reveal table td[align="center"] {
-  text-align: center; }
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
 
-.reveal table th[align="right"],
-.reveal table td[align="right"] {
-  text-align: right; }
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
 
 .reveal table tbody tr:last-child th,
 .reveal table tbody tr:last-child td {
-  border-bottom: none; }
+  border-bottom: none;
+}
 
 .reveal sup {
   vertical-align: super;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal sub {
   vertical-align: sub;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal small {
   display: inline-block;
   font-size: 0.6em;
   line-height: 1.2em;
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal small * {
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal img {
-  margin: 20px 0; }
+  margin: var(--r-block-margin) 0;
+}
 
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
-  color: #268bd2;
+  color: var(--r-link-color);
   text-decoration: none;
-  transition: color .15s ease; }
+  transition: color 0.15s ease;
+}
 
 .reveal a:hover {
-  color: #78b9e6;
+  color: var(--r-link-color-hover);
   text-shadow: none;
-  border: none; }
+  border: none;
+}
 
 .reveal .roll span:after {
   color: #fff;
-  background: #1a6091; }
+  background: var(--r-link-color-dark);
+}
 
 /*********************************************
  * Frame helper
  *********************************************/
 .reveal .r-frame {
-  border: 4px solid #657b83;
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
 
 .reveal a .r-frame {
-  transition: all .15s linear; }
+  transition: all 0.15s linear;
+}
 
 .reveal a:hover .r-frame {
-  border-color: #268bd2;
-  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 .reveal .controls {
-  color: #268bd2; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
   background: rgba(0, 0, 0, 0.2);
-  color: #268bd2; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PRINT BACKGROUND
  *********************************************/
 @media print {
   .backgrounds {
-    background-color: #fdf6e3; } }
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/white-contrast.css

@@ -0,0 +1,360 @@
+/**
+ * White compact & high contrast reveal.js theme, with headers not in capitals.
+ *
+ * By Peter Kehl. Based on white.(s)css by Hakim El Hattab, http://hakim.se
+ *
+ * - Keep the source similar to black.css - for easy comparison.
+ * - $mainFontSize controls code blocks, too (although under some ratio).
+ */
+@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
+ *********************************************/
+:root {
+  --r-background-color: #fff;
+  --r-main-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-main-font-size: 42px;
+  --r-main-color: #000;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-heading-color: #000;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: 600;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 2.5em;
+  --r-heading2-size: 1.6em;
+  --r-heading3-size: 1.3em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #2a76dd;
+  --r-link-color-dark: #1a53a1;
+  --r-link-color-hover: #6ca0e8;
+  --r-selection-background-color: #98bdef;
+  --r-selection-color: #fff;
+}
+
+.reveal-viewport {
+  background: #fff;
+  background-color: var(--r-background-color);
+}
+
+.reveal {
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
+  font-weight: normal;
+  color: var(--r-main-color);
+}
+
+.reveal ::selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal ::-moz-selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal .slides section,
+.reveal .slides section > section {
+  line-height: 1.3;
+  font-weight: inherit;
+}
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
+
+.reveal h1 {
+  font-size: var(--r-heading1-size);
+}
+
+.reveal h2 {
+  font-size: var(--r-heading2-size);
+}
+
+.reveal h3 {
+  font-size: var(--r-heading3-size);
+}
+
+.reveal h4 {
+  font-size: var(--r-heading4-size);
+}
+
+.reveal h1 {
+  text-shadow: var(--r-heading1-text-shadow);
+}
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: var(--r-block-margin) 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,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%;
+}
+
+.reveal strong,
+.reveal b {
+  font-weight: bold;
+}
+
+.reveal em {
+  font-style: italic;
+}
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em;
+}
+
+.reveal ol {
+  list-style-type: decimal;
+}
+
+.reveal ul {
+  list-style-type: disc;
+}
+
+.reveal ul ul {
+  list-style-type: square;
+}
+
+.reveal ul ul ul {
+  list-style-type: circle;
+}
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px;
+}
+
+.reveal dt {
+  font-weight: bold;
+}
+
+.reveal dd {
+  margin-left: 40px;
+}
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: var(--r-block-margin) auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block;
+}
+
+.reveal q {
+  font-style: italic;
+}
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: var(--r-block-margin) auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: var(--r-code-font);
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
+
+.reveal code {
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+.reveal table th {
+  font-weight: bold;
+}
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid;
+}
+
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
+
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none;
+}
+
+.reveal sup {
+  vertical-align: super;
+  font-size: smaller;
+}
+
+.reveal sub {
+  vertical-align: sub;
+  font-size: smaller;
+}
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top;
+}
+
+.reveal small * {
+  vertical-align: top;
+}
+
+.reveal img {
+  margin: var(--r-block-margin) 0;
+}
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: var(--r-link-color);
+  text-decoration: none;
+  transition: color 0.15s ease;
+}
+
+.reveal a:hover {
+  color: var(--r-link-color-hover);
+  text-shadow: none;
+  border: none;
+}
+
+.reveal .roll span:after {
+  color: #fff;
+  background: var(--r-link-color-dark);
+}
+
+/*********************************************
+ * Frame helper
+ *********************************************/
+.reveal .r-frame {
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
+
+.reveal a .r-frame {
+  transition: all 0.15s linear;
+}
+
+.reveal a:hover .r-frame {
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls {
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2);
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/white.css

@@ -3,62 +3,70 @@
  *
  * By Hakim El Hattab, http://hakim.se
  */
-@import url(fonts/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; }
+  color: #fff;
+}
 
 /*********************************************
  * GLOBAL STYLES
  *********************************************/
 :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; }
+  --r-background-color: #fff;
+  --r-main-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-main-font-size: 42px;
+  --r-main-color: #222;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-heading-color: #222;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: 600;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 2.5em;
+  --r-heading2-size: 1.6em;
+  --r-heading3-size: 1.3em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #2a76dd;
+  --r-link-color-dark: #1a53a1;
+  --r-link-color-hover: #6ca0e8;
+  --r-selection-background-color: #98bdef;
+  --r-selection-color: #fff;
+}
 
 .reveal-viewport {
   background: #fff;
-  background-color: #fff; }
+  background-color: var(--r-background-color);
+}
 
 .reveal {
-  font-family: "Source Sans Pro", Helvetica, sans-serif;
-  font-size: 42px;
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
   font-weight: normal;
-  color: #222; }
+  color: var(--r-main-color);
+}
 
 .reveal ::selection {
-  color: #fff;
-  background: #98bdef;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal ::-moz-selection {
-  color: #fff;
-  background: #98bdef;
-  text-shadow: none; }
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
 
 .reveal .slides section,
 .reveal .slides section > section {
   line-height: 1.3;
-  font-weight: inherit; }
+  font-weight: inherit;
+}
 
 /*********************************************
  * HEADERS
@@ -69,217 +77,281 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
 .reveal h4,
 .reveal h5,
 .reveal h6 {
-  margin: 0 0 20px 0;
-  color: #222;
-  font-family: "Source Sans Pro", Helvetica, sans-serif;
-  font-weight: 600;
-  line-height: 1.2;
-  letter-spacing: normal;
-  text-transform: uppercase;
-  text-shadow: none;
-  word-wrap: break-word; }
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
 
 .reveal h1 {
-  font-size: 2.5em; }
+  font-size: var(--r-heading1-size);
+}
 
 .reveal h2 {
-  font-size: 1.6em; }
+  font-size: var(--r-heading2-size);
+}
 
 .reveal h3 {
-  font-size: 1.3em; }
+  font-size: var(--r-heading3-size);
+}
 
 .reveal h4 {
-  font-size: 1em; }
+  font-size: var(--r-heading4-size);
+}
 
 .reveal h1 {
-  text-shadow: none; }
+  text-shadow: var(--r-heading1-text-shadow);
+}
 
 /*********************************************
  * OTHER
  *********************************************/
 .reveal p {
-  margin: 20px 0;
-  line-height: 1.3; }
+  margin: var(--r-block-margin) 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,
 .reveal iframe {
   max-width: 95%;
-  max-height: 95%; }
+  max-height: 95%;
+}
 
 .reveal strong,
 .reveal b {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal em {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal ol,
 .reveal dl,
 .reveal ul {
   display: inline-block;
   text-align: left;
-  margin: 0 0 0 1em; }
+  margin: 0 0 0 1em;
+}
 
 .reveal ol {
-  list-style-type: decimal; }
+  list-style-type: decimal;
+}
 
 .reveal ul {
-  list-style-type: disc; }
+  list-style-type: disc;
+}
 
 .reveal ul ul {
-  list-style-type: square; }
+  list-style-type: square;
+}
 
 .reveal ul ul ul {
-  list-style-type: circle; }
+  list-style-type: circle;
+}
 
 .reveal ul ul,
 .reveal ul ol,
 .reveal ol ol,
 .reveal ol ul {
   display: block;
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal dt {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal dd {
-  margin-left: 40px; }
+  margin-left: 40px;
+}
 
 .reveal blockquote {
   display: block;
   position: relative;
   width: 70%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   padding: 5px;
   font-style: italic;
   background: rgba(255, 255, 255, 0.05);
-  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
 
 .reveal blockquote p:first-child,
 .reveal blockquote p:last-child {
-  display: inline-block; }
+  display: inline-block;
+}
 
 .reveal q {
-  font-style: italic; }
+  font-style: italic;
+}
 
 .reveal pre {
   display: block;
   position: relative;
   width: 90%;
-  margin: 20px auto;
+  margin: var(--r-block-margin) auto;
   text-align: left;
   font-size: 0.55em;
-  font-family: monospace;
+  font-family: var(--r-code-font);
   line-height: 1.2em;
   word-wrap: break-word;
-  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15); }
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
 
 .reveal code {
-  font-family: monospace;
-  text-transform: none; }
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
 
 .reveal pre code {
   display: block;
   padding: 5px;
   overflow: auto;
   max-height: 400px;
-  word-wrap: normal; }
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
 
 .reveal table {
   margin: auto;
   border-collapse: collapse;
-  border-spacing: 0; }
+  border-spacing: 0;
+}
 
 .reveal table th {
-  font-weight: bold; }
+  font-weight: bold;
+}
 
 .reveal table th,
 .reveal table td {
   text-align: left;
   padding: 0.2em 0.5em 0.2em 0.5em;
-  border-bottom: 1px solid; }
+  border-bottom: 1px solid;
+}
 
-.reveal table th[align="center"],
-.reveal table td[align="center"] {
-  text-align: center; }
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
 
-.reveal table th[align="right"],
-.reveal table td[align="right"] {
-  text-align: right; }
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
 
 .reveal table tbody tr:last-child th,
 .reveal table tbody tr:last-child td {
-  border-bottom: none; }
+  border-bottom: none;
+}
 
 .reveal sup {
   vertical-align: super;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal sub {
   vertical-align: sub;
-  font-size: smaller; }
+  font-size: smaller;
+}
 
 .reveal small {
   display: inline-block;
   font-size: 0.6em;
   line-height: 1.2em;
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal small * {
-  vertical-align: top; }
+  vertical-align: top;
+}
 
 .reveal img {
-  margin: 20px 0; }
+  margin: var(--r-block-margin) 0;
+}
 
 /*********************************************
  * LINKS
  *********************************************/
 .reveal a {
-  color: #2a76dd;
+  color: var(--r-link-color);
   text-decoration: none;
-  transition: color .15s ease; }
+  transition: color 0.15s ease;
+}
 
 .reveal a:hover {
-  color: #6ca0e8;
+  color: var(--r-link-color-hover);
   text-shadow: none;
-  border: none; }
+  border: none;
+}
 
 .reveal .roll span:after {
   color: #fff;
-  background: #1a53a1; }
+  background: var(--r-link-color-dark);
+}
 
 /*********************************************
  * Frame helper
  *********************************************/
 .reveal .r-frame {
-  border: 4px solid #222;
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
 
 .reveal a .r-frame {
-  transition: all .15s linear; }
+  transition: all 0.15s linear;
+}
 
 .reveal a:hover .r-frame {
-  border-color: #2a76dd;
-  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
 
 /*********************************************
  * NAVIGATION CONTROLS
  *********************************************/
 .reveal .controls {
-  color: #2a76dd; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PROGRESS BAR
  *********************************************/
 .reveal .progress {
   background: rgba(0, 0, 0, 0.2);
-  color: #2a76dd; }
+  color: var(--r-link-color);
+}
 
 /*********************************************
  * PRINT BACKGROUND
  *********************************************/
 @media print {
   .backgrounds {
-    background-color: #fff; } }
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/white_contrast_compact_verbatim_headers.css

@@ -0,0 +1,360 @@
+/**
+ * White compact & high contrast reveal.js theme, with headers not in capitals.
+ *
+ * By Peter Kehl. Based on white.(s)css by Hakim El Hattab, http://hakim.se
+ *
+ * - Keep the source similar to black.css - for easy comparison.
+ * - $mainFontSize controls code blocks, too (although under some ratio).
+ */
+@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
+ *********************************************/
+:root {
+  --r-background-color: #fff;
+  --r-main-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-main-font-size: 25px;
+  --r-main-color: #000;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-heading-color: #000;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: none;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: 450;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 2.5em;
+  --r-heading2-size: 1.6em;
+  --r-heading3-size: 1.3em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #2a76dd;
+  --r-link-color-dark: #1a53a1;
+  --r-link-color-hover: #6ca0e8;
+  --r-selection-background-color: #98bdef;
+  --r-selection-color: #fff;
+}
+
+.reveal-viewport {
+  background: #fff;
+  background-color: var(--r-background-color);
+}
+
+.reveal {
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
+  font-weight: normal;
+  color: var(--r-main-color);
+}
+
+.reveal ::selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal ::-moz-selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal .slides section,
+.reveal .slides section > section {
+  line-height: 1.3;
+  font-weight: inherit;
+}
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
+
+.reveal h1 {
+  font-size: var(--r-heading1-size);
+}
+
+.reveal h2 {
+  font-size: var(--r-heading2-size);
+}
+
+.reveal h3 {
+  font-size: var(--r-heading3-size);
+}
+
+.reveal h4 {
+  font-size: var(--r-heading4-size);
+}
+
+.reveal h1 {
+  text-shadow: var(--r-heading1-text-shadow);
+}
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: var(--r-block-margin) 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,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%;
+}
+
+.reveal strong,
+.reveal b {
+  font-weight: bold;
+}
+
+.reveal em {
+  font-style: italic;
+}
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em;
+}
+
+.reveal ol {
+  list-style-type: decimal;
+}
+
+.reveal ul {
+  list-style-type: disc;
+}
+
+.reveal ul ul {
+  list-style-type: square;
+}
+
+.reveal ul ul ul {
+  list-style-type: circle;
+}
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px;
+}
+
+.reveal dt {
+  font-weight: bold;
+}
+
+.reveal dd {
+  margin-left: 40px;
+}
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: var(--r-block-margin) auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block;
+}
+
+.reveal q {
+  font-style: italic;
+}
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: var(--r-block-margin) auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: var(--r-code-font);
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
+
+.reveal code {
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+.reveal table th {
+  font-weight: bold;
+}
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid;
+}
+
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
+
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none;
+}
+
+.reveal sup {
+  vertical-align: super;
+  font-size: smaller;
+}
+
+.reveal sub {
+  vertical-align: sub;
+  font-size: smaller;
+}
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top;
+}
+
+.reveal small * {
+  vertical-align: top;
+}
+
+.reveal img {
+  margin: var(--r-block-margin) 0;
+}
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: var(--r-link-color);
+  text-decoration: none;
+  transition: color 0.15s ease;
+}
+
+.reveal a:hover {
+  color: var(--r-link-color-hover);
+  text-shadow: none;
+  border: none;
+}
+
+.reveal .roll span:after {
+  color: #fff;
+  background: var(--r-link-color-dark);
+}
+
+/*********************************************
+ * Frame helper
+ *********************************************/
+.reveal .r-frame {
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
+
+.reveal a .r-frame {
+  transition: all 0.15s linear;
+}
+
+.reveal a:hover .r-frame {
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls {
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2);
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: var(--r-background-color);
+  }
+}

examples/500-slides.html

@@ -0,0 +1,526 @@
+<!doctype html>
+<html lang="en">
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - 500 slides</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">
+	</head>
+
+	<body>
+		<div class="reveal">
+			<div class="slides">
+				<section><h1>1</h1></section>
+				<section><h1>2</h1></section>
+				<section><h1>3</h1></section>
+				<section><h1>4</h1></section>
+				<section><h1>5</h1></section>
+				<section><h1>6</h1></section>
+				<section><h1>7</h1></section>
+				<section><h1>8</h1></section>
+				<section><h1>9</h1></section>
+				<section><h1>10</h1></section>
+				<section><h1>11</h1></section>
+				<section><h1>12</h1></section>
+				<section><h1>13</h1></section>
+				<section><h1>14</h1></section>
+				<section><h1>15</h1></section>
+				<section><h1>16</h1></section>
+				<section><h1>17</h1></section>
+				<section><h1>18</h1></section>
+				<section><h1>19</h1></section>
+				<section><h1>20</h1></section>
+				<section><h1>21</h1></section>
+				<section><h1>22</h1></section>
+				<section><h1>23</h1></section>
+				<section><h1>24</h1></section>
+				<section><h1>25</h1></section>
+				<section><h1>26</h1></section>
+				<section><h1>27</h1></section>
+				<section><h1>28</h1></section>
+				<section><h1>29</h1></section>
+				<section><h1>30</h1></section>
+				<section><h1>31</h1></section>
+				<section><h1>32</h1></section>
+				<section><h1>33</h1></section>
+				<section><h1>34</h1></section>
+				<section><h1>35</h1></section>
+				<section><h1>36</h1></section>
+				<section><h1>37</h1></section>
+				<section><h1>38</h1></section>
+				<section><h1>39</h1></section>
+				<section><h1>40</h1></section>
+				<section><h1>41</h1></section>
+				<section><h1>42</h1></section>
+				<section><h1>43</h1></section>
+				<section><h1>44</h1></section>
+				<section><h1>45</h1></section>
+				<section><h1>46</h1></section>
+				<section><h1>47</h1></section>
+				<section><h1>48</h1></section>
+				<section><h1>49</h1></section>
+				<section><h1>50</h1></section>
+				<section><h1>51</h1></section>
+				<section><h1>52</h1></section>
+				<section><h1>53</h1></section>
+				<section><h1>54</h1></section>
+				<section><h1>55</h1></section>
+				<section><h1>56</h1></section>
+				<section><h1>57</h1></section>
+				<section><h1>58</h1></section>
+				<section><h1>59</h1></section>
+				<section><h1>60</h1></section>
+				<section><h1>61</h1></section>
+				<section><h1>62</h1></section>
+				<section><h1>63</h1></section>
+				<section><h1>64</h1></section>
+				<section><h1>65</h1></section>
+				<section><h1>66</h1></section>
+				<section><h1>67</h1></section>
+				<section><h1>68</h1></section>
+				<section><h1>69</h1></section>
+				<section><h1>70</h1></section>
+				<section><h1>71</h1></section>
+				<section><h1>72</h1></section>
+				<section><h1>73</h1></section>
+				<section><h1>74</h1></section>
+				<section><h1>75</h1></section>
+				<section><h1>76</h1></section>
+				<section><h1>77</h1></section>
+				<section><h1>78</h1></section>
+				<section><h1>79</h1></section>
+				<section><h1>80</h1></section>
+				<section><h1>81</h1></section>
+				<section><h1>82</h1></section>
+				<section><h1>83</h1></section>
+				<section><h1>84</h1></section>
+				<section><h1>85</h1></section>
+				<section><h1>86</h1></section>
+				<section><h1>87</h1></section>
+				<section><h1>88</h1></section>
+				<section><h1>89</h1></section>
+				<section><h1>90</h1></section>
+				<section><h1>91</h1></section>
+				<section><h1>92</h1></section>
+				<section><h1>93</h1></section>
+				<section><h1>94</h1></section>
+				<section><h1>95</h1></section>
+				<section><h1>96</h1></section>
+				<section><h1>97</h1></section>
+				<section><h1>98</h1></section>
+				<section><h1>99</h1></section>
+				<section><h1>100</h1></section>
+				<section><h1>101</h1></section>
+				<section><h1>102</h1></section>
+				<section><h1>103</h1></section>
+				<section><h1>104</h1></section>
+				<section><h1>105</h1></section>
+				<section><h1>106</h1></section>
+				<section><h1>107</h1></section>
+				<section><h1>108</h1></section>
+				<section><h1>109</h1></section>
+				<section><h1>110</h1></section>
+				<section><h1>111</h1></section>
+				<section><h1>112</h1></section>
+				<section><h1>113</h1></section>
+				<section><h1>114</h1></section>
+				<section><h1>115</h1></section>
+				<section><h1>116</h1></section>
+				<section><h1>117</h1></section>
+				<section><h1>118</h1></section>
+				<section><h1>119</h1></section>
+				<section><h1>120</h1></section>
+				<section><h1>121</h1></section>
+				<section><h1>122</h1></section>
+				<section><h1>123</h1></section>
+				<section><h1>124</h1></section>
+				<section><h1>125</h1></section>
+				<section><h1>126</h1></section>
+				<section><h1>127</h1></section>
+				<section><h1>128</h1></section>
+				<section><h1>129</h1></section>
+				<section><h1>130</h1></section>
+				<section><h1>131</h1></section>
+				<section><h1>132</h1></section>
+				<section><h1>133</h1></section>
+				<section><h1>134</h1></section>
+				<section><h1>135</h1></section>
+				<section><h1>136</h1></section>
+				<section><h1>137</h1></section>
+				<section><h1>138</h1></section>
+				<section><h1>139</h1></section>
+				<section><h1>140</h1></section>
+				<section><h1>141</h1></section>
+				<section><h1>142</h1></section>
+				<section><h1>143</h1></section>
+				<section><h1>144</h1></section>
+				<section><h1>145</h1></section>
+				<section><h1>146</h1></section>
+				<section><h1>147</h1></section>
+				<section><h1>148</h1></section>
+				<section><h1>149</h1></section>
+				<section><h1>150</h1></section>
+				<section><h1>151</h1></section>
+				<section><h1>152</h1></section>
+				<section><h1>153</h1></section>
+				<section><h1>154</h1></section>
+				<section><h1>155</h1></section>
+				<section><h1>156</h1></section>
+				<section><h1>157</h1></section>
+				<section><h1>158</h1></section>
+				<section><h1>159</h1></section>
+				<section><h1>160</h1></section>
+				<section><h1>161</h1></section>
+				<section><h1>162</h1></section>
+				<section><h1>163</h1></section>
+				<section><h1>164</h1></section>
+				<section><h1>165</h1></section>
+				<section><h1>166</h1></section>
+				<section><h1>167</h1></section>
+				<section><h1>168</h1></section>
+				<section><h1>169</h1></section>
+				<section><h1>170</h1></section>
+				<section><h1>171</h1></section>
+				<section><h1>172</h1></section>
+				<section><h1>173</h1></section>
+				<section><h1>174</h1></section>
+				<section><h1>175</h1></section>
+				<section><h1>176</h1></section>
+				<section><h1>177</h1></section>
+				<section><h1>178</h1></section>
+				<section><h1>179</h1></section>
+				<section><h1>180</h1></section>
+				<section><h1>181</h1></section>
+				<section><h1>182</h1></section>
+				<section><h1>183</h1></section>
+				<section><h1>184</h1></section>
+				<section><h1>185</h1></section>
+				<section><h1>186</h1></section>
+				<section><h1>187</h1></section>
+				<section><h1>188</h1></section>
+				<section><h1>189</h1></section>
+				<section><h1>190</h1></section>
+				<section><h1>191</h1></section>
+				<section><h1>192</h1></section>
+				<section><h1>193</h1></section>
+				<section><h1>194</h1></section>
+				<section><h1>195</h1></section>
+				<section><h1>196</h1></section>
+				<section><h1>197</h1></section>
+				<section><h1>198</h1></section>
+				<section><h1>199</h1></section>
+				<section><h1>200</h1></section>
+				<section><h1>201</h1></section>
+				<section><h1>202</h1></section>
+				<section><h1>203</h1></section>
+				<section><h1>204</h1></section>
+				<section><h1>205</h1></section>
+				<section><h1>206</h1></section>
+				<section><h1>207</h1></section>
+				<section><h1>208</h1></section>
+				<section><h1>209</h1></section>
+				<section><h1>210</h1></section>
+				<section><h1>211</h1></section>
+				<section><h1>212</h1></section>
+				<section><h1>213</h1></section>
+				<section><h1>214</h1></section>
+				<section><h1>215</h1></section>
+				<section><h1>216</h1></section>
+				<section><h1>217</h1></section>
+				<section><h1>218</h1></section>
+				<section><h1>219</h1></section>
+				<section><h1>220</h1></section>
+				<section><h1>221</h1></section>
+				<section><h1>222</h1></section>
+				<section><h1>223</h1></section>
+				<section><h1>224</h1></section>
+				<section><h1>225</h1></section>
+				<section><h1>226</h1></section>
+				<section><h1>227</h1></section>
+				<section><h1>228</h1></section>
+				<section><h1>229</h1></section>
+				<section><h1>230</h1></section>
+				<section><h1>231</h1></section>
+				<section><h1>232</h1></section>
+				<section><h1>233</h1></section>
+				<section><h1>234</h1></section>
+				<section><h1>235</h1></section>
+				<section><h1>236</h1></section>
+				<section><h1>237</h1></section>
+				<section><h1>238</h1></section>
+				<section><h1>239</h1></section>
+				<section><h1>240</h1></section>
+				<section><h1>241</h1></section>
+				<section><h1>242</h1></section>
+				<section><h1>243</h1></section>
+				<section><h1>244</h1></section>
+				<section><h1>245</h1></section>
+				<section><h1>246</h1></section>
+				<section><h1>247</h1></section>
+				<section><h1>248</h1></section>
+				<section><h1>249</h1></section>
+				<section><h1>250</h1></section>
+				<section><h1>251</h1></section>
+				<section><h1>252</h1></section>
+				<section><h1>253</h1></section>
+				<section><h1>254</h1></section>
+				<section><h1>255</h1></section>
+				<section><h1>256</h1></section>
+				<section><h1>257</h1></section>
+				<section><h1>258</h1></section>
+				<section><h1>259</h1></section>
+				<section><h1>260</h1></section>
+				<section><h1>261</h1></section>
+				<section><h1>262</h1></section>
+				<section><h1>263</h1></section>
+				<section><h1>264</h1></section>
+				<section><h1>265</h1></section>
+				<section><h1>266</h1></section>
+				<section><h1>267</h1></section>
+				<section><h1>268</h1></section>
+				<section><h1>269</h1></section>
+				<section><h1>270</h1></section>
+				<section><h1>271</h1></section>
+				<section><h1>272</h1></section>
+				<section><h1>273</h1></section>
+				<section><h1>274</h1></section>
+				<section><h1>275</h1></section>
+				<section><h1>276</h1></section>
+				<section><h1>277</h1></section>
+				<section><h1>278</h1></section>
+				<section><h1>279</h1></section>
+				<section><h1>280</h1></section>
+				<section><h1>281</h1></section>
+				<section><h1>282</h1></section>
+				<section><h1>283</h1></section>
+				<section><h1>284</h1></section>
+				<section><h1>285</h1></section>
+				<section><h1>286</h1></section>
+				<section><h1>287</h1></section>
+				<section><h1>288</h1></section>
+				<section><h1>289</h1></section>
+				<section><h1>290</h1></section>
+				<section><h1>291</h1></section>
+				<section><h1>292</h1></section>
+				<section><h1>293</h1></section>
+				<section><h1>294</h1></section>
+				<section><h1>295</h1></section>
+				<section><h1>296</h1></section>
+				<section><h1>297</h1></section>
+				<section><h1>298</h1></section>
+				<section><h1>299</h1></section>
+				<section><h1>300</h1></section>
+				<section><h1>301</h1></section>
+				<section><h1>302</h1></section>
+				<section><h1>303</h1></section>
+				<section><h1>304</h1></section>
+				<section><h1>305</h1></section>
+				<section><h1>306</h1></section>
+				<section><h1>307</h1></section>
+				<section><h1>308</h1></section>
+				<section><h1>309</h1></section>
+				<section><h1>310</h1></section>
+				<section><h1>311</h1></section>
+				<section><h1>312</h1></section>
+				<section><h1>313</h1></section>
+				<section><h1>314</h1></section>
+				<section><h1>315</h1></section>
+				<section><h1>316</h1></section>
+				<section><h1>317</h1></section>
+				<section><h1>318</h1></section>
+				<section><h1>319</h1></section>
+				<section><h1>320</h1></section>
+				<section><h1>321</h1></section>
+				<section><h1>322</h1></section>
+				<section><h1>323</h1></section>
+				<section><h1>324</h1></section>
+				<section><h1>325</h1></section>
+				<section><h1>326</h1></section>
+				<section><h1>327</h1></section>
+				<section><h1>328</h1></section>
+				<section><h1>329</h1></section>
+				<section><h1>330</h1></section>
+				<section><h1>331</h1></section>
+				<section><h1>332</h1></section>
+				<section><h1>333</h1></section>
+				<section><h1>334</h1></section>
+				<section><h1>335</h1></section>
+				<section><h1>336</h1></section>
+				<section><h1>337</h1></section>
+				<section><h1>338</h1></section>
+				<section><h1>339</h1></section>
+				<section><h1>340</h1></section>
+				<section><h1>341</h1></section>
+				<section><h1>342</h1></section>
+				<section><h1>343</h1></section>
+				<section><h1>344</h1></section>
+				<section><h1>345</h1></section>
+				<section><h1>346</h1></section>
+				<section><h1>347</h1></section>
+				<section><h1>348</h1></section>
+				<section><h1>349</h1></section>
+				<section><h1>350</h1></section>
+				<section><h1>351</h1></section>
+				<section><h1>352</h1></section>
+				<section><h1>353</h1></section>
+				<section><h1>354</h1></section>
+				<section><h1>355</h1></section>
+				<section><h1>356</h1></section>
+				<section><h1>357</h1></section>
+				<section><h1>358</h1></section>
+				<section><h1>359</h1></section>
+				<section><h1>360</h1></section>
+				<section><h1>361</h1></section>
+				<section><h1>362</h1></section>
+				<section><h1>363</h1></section>
+				<section><h1>364</h1></section>
+				<section><h1>365</h1></section>
+				<section><h1>366</h1></section>
+				<section><h1>367</h1></section>
+				<section><h1>368</h1></section>
+				<section><h1>369</h1></section>
+				<section><h1>370</h1></section>
+				<section><h1>371</h1></section>
+				<section><h1>372</h1></section>
+				<section><h1>373</h1></section>
+				<section><h1>374</h1></section>
+				<section><h1>375</h1></section>
+				<section><h1>376</h1></section>
+				<section><h1>377</h1></section>
+				<section><h1>378</h1></section>
+				<section><h1>379</h1></section>
+				<section><h1>380</h1></section>
+				<section><h1>381</h1></section>
+				<section><h1>382</h1></section>
+				<section><h1>383</h1></section>
+				<section><h1>384</h1></section>
+				<section><h1>385</h1></section>
+				<section><h1>386</h1></section>
+				<section><h1>387</h1></section>
+				<section><h1>388</h1></section>
+				<section><h1>389</h1></section>
+				<section><h1>390</h1></section>
+				<section><h1>391</h1></section>
+				<section><h1>392</h1></section>
+				<section><h1>393</h1></section>
+				<section><h1>394</h1></section>
+				<section><h1>395</h1></section>
+				<section><h1>396</h1></section>
+				<section><h1>397</h1></section>
+				<section><h1>398</h1></section>
+				<section><h1>399</h1></section>
+				<section><h1>400</h1></section>
+				<section><h1>401</h1></section>
+				<section><h1>402</h1></section>
+				<section><h1>403</h1></section>
+				<section><h1>404</h1></section>
+				<section><h1>405</h1></section>
+				<section><h1>406</h1></section>
+				<section><h1>407</h1></section>
+				<section><h1>408</h1></section>
+				<section><h1>409</h1></section>
+				<section><h1>410</h1></section>
+				<section><h1>411</h1></section>
+				<section><h1>412</h1></section>
+				<section><h1>413</h1></section>
+				<section><h1>414</h1></section>
+				<section><h1>415</h1></section>
+				<section><h1>416</h1></section>
+				<section><h1>417</h1></section>
+				<section><h1>418</h1></section>
+				<section><h1>419</h1></section>
+				<section><h1>420</h1></section>
+				<section><h1>421</h1></section>
+				<section><h1>422</h1></section>
+				<section><h1>423</h1></section>
+				<section><h1>424</h1></section>
+				<section><h1>425</h1></section>
+				<section><h1>426</h1></section>
+				<section><h1>427</h1></section>
+				<section><h1>428</h1></section>
+				<section><h1>429</h1></section>
+				<section><h1>430</h1></section>
+				<section><h1>431</h1></section>
+				<section><h1>432</h1></section>
+				<section><h1>433</h1></section>
+				<section><h1>434</h1></section>
+				<section><h1>435</h1></section>
+				<section><h1>436</h1></section>
+				<section><h1>437</h1></section>
+				<section><h1>438</h1></section>
+				<section><h1>439</h1></section>
+				<section><h1>440</h1></section>
+				<section><h1>441</h1></section>
+				<section><h1>442</h1></section>
+				<section><h1>443</h1></section>
+				<section><h1>444</h1></section>
+				<section><h1>445</h1></section>
+				<section><h1>446</h1></section>
+				<section><h1>447</h1></section>
+				<section><h1>448</h1></section>
+				<section><h1>449</h1></section>
+				<section><h1>450</h1></section>
+				<section><h1>451</h1></section>
+				<section><h1>452</h1></section>
+				<section><h1>453</h1></section>
+				<section><h1>454</h1></section>
+				<section><h1>455</h1></section>
+				<section><h1>456</h1></section>
+				<section><h1>457</h1></section>
+				<section><h1>458</h1></section>
+				<section><h1>459</h1></section>
+				<section><h1>460</h1></section>
+				<section><h1>461</h1></section>
+				<section><h1>462</h1></section>
+				<section><h1>463</h1></section>
+				<section><h1>464</h1></section>
+				<section><h1>465</h1></section>
+				<section><h1>466</h1></section>
+				<section><h1>467</h1></section>
+				<section><h1>468</h1></section>
+				<section><h1>469</h1></section>
+				<section><h1>470</h1></section>
+				<section><h1>471</h1></section>
+				<section><h1>472</h1></section>
+				<section><h1>473</h1></section>
+				<section><h1>474</h1></section>
+				<section><h1>475</h1></section>
+				<section><h1>476</h1></section>
+				<section><h1>477</h1></section>
+				<section><h1>478</h1></section>
+				<section><h1>479</h1></section>
+				<section><h1>480</h1></section>
+				<section><h1>481</h1></section>
+				<section><h1>482</h1></section>
+				<section><h1>483</h1></section>
+				<section><h1>484</h1></section>
+				<section><h1>485</h1></section>
+				<section><h1>486</h1></section>
+				<section><h1>487</h1></section>
+				<section><h1>488</h1></section>
+				<section><h1>489</h1></section>
+				<section><h1>490</h1></section>
+				<section><h1>491</h1></section>
+				<section><h1>492</h1></section>
+				<section><h1>493</h1></section>
+				<section><h1>494</h1></section>
+				<section><h1>495</h1></section>
+				<section><h1>496</h1></section>
+				<section><h1>497</h1></section>
+				<section><h1>498</h1></section>
+				<section><h1>499</h1></section>
+			</div>
+		</div>
+
+		<script src="../dist/reveal.js"></script>
+		<script>
+			Reveal.initialize({
+				transition: 'linear'
+			});
+		</script>
+	</body>
+</html>

examples/auto-animate.html

@@ -18,7 +18,6 @@
 		<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>
@@ -126,7 +125,7 @@
 				</section>
 
 				<section data-auto-animate style="height: 600px">
-					<h3 style="opacity: 0.3; font-size: 18px;">SLIDE 1</h2>
+					<h3 style="opacity: 0.3; font-size: 18px;">SLIDE 1</h3>
 					<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>
@@ -134,7 +133,7 @@
 					<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>
+					<h3 style="opacity: 0.3; font-size: 18px;">SLIDE 2</h3>
 					<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>
@@ -142,7 +141,7 @@
 					<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>
+					<h3 style="opacity: 0.3; font-size: 18px;">SLIDE 3</h3>
 					<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>
@@ -150,7 +149,7 @@
 					<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>
+					<h3 style="opacity: 0.3; font-size: 18px;">SLIDE 3</h3>
 					<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>
@@ -158,6 +157,56 @@
 					<div data-id="4" style="background: cyan; position: absolute; top: 250px; left: 76%; width: 60px; height: 60px;"></div>
 				</section>
 
+				<section data-auto-animate data-auto-animate-id="a">
+					<h2>data-auto-animate-id="a"</h2>
+					<h3>A1</h3>
+				</section>
+				<section data-auto-animate data-auto-animate-id="a">
+					<h2>data-auto-animate-id="a"</h2>
+					<h3>A1</h3>
+					<h3>A2</h3>
+				</section>
+				<section data-auto-animate data-auto-animate-id="b">
+					<h2>data-auto-animate-id="b"</h2>
+					<h3>B1</h3>
+				</section>
+				<section data-auto-animate data-auto-animate-id="b">
+					<h2>data-auto-animate-id="b"</h2>
+					<h3>B1</h3>
+					<h3>B2</h3>
+				</section>
+
+				<section>
+					<section id="stacked-slide-1" data-auto-animate>
+						<a href="#/stacked-slide-1">Slide 1</a><br>
+						<a href="#/stacked-slide-2">Slide 2</a><br>
+						<a href="#/stacked-slide-3">Slide 3</a><br>
+						<a href="#/stacked-slide-4">Slide 4</a><br>
+						<div data-id="anim" style="background: indigo; padding: 8px; width: 50px; height: 50px; position: absolute; left: 0px;">A</div>
+					</section>
+					<section id="stacked-slide-2" data-auto-animate>
+						<a href="#/stacked-slide-1">Slide 1</a><br>
+						<a href="#/stacked-slide-2">Slide 2</a><br>
+						<a href="#/stacked-slide-3">Slide 3</a><br>
+						<a href="#/stacked-slide-4">Slide 4</a><br>
+						<div data-id="anim" style="background: indigo; padding: 8px; width: 50px; height: 50px; position: absolute; left: 25%;">A</div>
+					</section>
+					<section id="stacked-slide-3" data-auto-animate>
+						<a href="#/stacked-slide-1">Slide 1</a><br>
+						<a href="#/stacked-slide-2">Slide 2</a><br>
+						<a href="#/stacked-slide-3">Slide 3</a><br>
+						<a href="#/stacked-slide-4">Slide 4</a><br>
+						<div data-id="anim" style="background: indigo; padding: 8px; width: 50px; height: 50px; position: absolute; left: 50%;">A</div>
+					</section>
+					<section id="stacked-slide-4" data-auto-animate>
+						<a href="#/stacked-slide-1">Slide 1</a><br>
+						<a href="#/stacked-slide-2">Slide 2</a><br>
+						<a href="#/stacked-slide-3">Slide 3</a><br>
+						<a href="#/stacked-slide-4">Slide 4</a><br>
+						<div data-id="anim" style="background: indigo; padding: 8px; width: 50px; height: 50px; position: absolute; left: 75%;">A</div>
+					</section>
+				</section>
+
 			</div>
 
 		</div>

examples/layout-helpers.html

@@ -22,11 +22,31 @@
 				<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>
@@ -57,6 +77,12 @@
 
 				<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">
@@ -66,11 +92,53 @@
 
 				<section>
 					<h2>Stack Example</h2>
-					<p>One at a time.</p>
+					<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-out" data-fragment-index="0">
-						<img src="https://placekitten.com/300/450" width="300" height="450" class="fragment current-visible" data-fragment-index="0">
-						<img src="https://placekitten.com/400/400" width="400" height="400" class="fragment">
+						<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 vertically.</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>
 

examples/markdown.html

@@ -21,8 +21,8 @@
                 <!-- Use external markdown resource, separate slides by three newlines; vertical slides by two newlines -->
                 <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="---">
+                <!-- Slides are separated by three dashes (the default) -->
+                <section data-markdown>
                     <script type="text/template">
                         ## Demo 1
                         Slide 1
@@ -35,7 +35,7 @@
                     </script>
                 </section>
 
-                <!-- Slides are separated by newline + three dashes + newline, vertical slides identical but two dashes -->
+                <!-- Slides are separated by regexp matching newline + three dashes + newline, vertical slides identical but two dashes -->
                 <section data-markdown data-separator="^\n---\n$" data-separator-vertical="^\n--\n$">
                     <script type="text/template">
                         ## Demo 2
@@ -53,8 +53,8 @@
                     </script>
                 </section>
 
-                <!-- No "extra" slides, since there are no separators defined (so they'll become horizontal rulers) -->
-                <section data-markdown>
+                <!-- No "extra" slides, since the separator can't be matched ("---" will become horizontal rulers) -->
+                <section data-markdown data-separator="$x">
                     <script type="text/template">
                         A
 
@@ -99,6 +99,25 @@
                     </script>
                 </section>
 
+                <!-- add optional line count offset, in this case 287 -->
+                <section data-markdown>
+                    <script type="text/template">
+                        ## echo.c
+
+                        ```c [287: 2|4,6]
+                        /* All of the options in this arg are valid, so handle them. */
+                        p = arg + 1;
+                        do {
+                            if (*p == 'n')
+                                nflag = 0;
+                            if (*p == 'e')
+                                eflag = '\\';
+                        } while (*++p); 
+                        ```
+                        [source](https://git.busybox.net/busybox/tree/coreutils/echo.c?h=1_36_stable#n287)
+                    </script>
+                </section>
+
                 <!-- Images -->
                 <section data-markdown>
                     <script type="text/template">
@@ -106,6 +125,16 @@
                     </script>
                 </section>
 
+                <!-- Math -->
+                <section data-markdown>
+					## The Lorenz Equations
+					`\[\begin{aligned}
+					\dot{x} &amp; = \sigma(y-x) \\
+					\dot{y} &amp; = \rho x - y - xz \\
+					\dot{z} &amp; = -\beta z + xy
+					\end{aligned} \]`
+                </section>
+
             </div>
 		</div>
 
@@ -113,6 +142,7 @@
         <script src="../plugin/markdown/markdown.js"></script>
         <script src="../plugin/highlight/highlight.js"></script>
         <script src="../plugin/notes/notes.js"></script>
+        <script src="../plugin/math/math.js"></script>
 
 		<script>
 
@@ -122,7 +152,7 @@
 				history: true,
 				center: true,
 
-				plugins: [ RevealMarkdown, RevealHighlight, RevealNotes ]
+				plugins: [ RevealMarkdown, RevealHighlight, RevealNotes, RevealMath.KaTeX ]
 			});
 
 		</script>

examples/markdown.md

@@ -31,6 +31,11 @@ Content 3.1
 Content 3.2
 
 
-## External 3.3
+## External 3.3 (Image)
 
 ![External Image](https://s3.amazonaws.com/static.slid.es/logo/v2/slides-symbol-512x512.png)
+
+
+## External 3.4 (Math)
+
+`\[ J(\theta_0,\theta_1) = \sum_{i=0} \]`

examples/math.html

@@ -20,7 +20,7 @@
 
 				<section>
 					<h2>reveal.js Math Plugin</h2>
-					<p>A thin wrapper for MathJax</p>
+					<p>Render math with KaTeX, MathJax 2 or MathJax 3</p>
 				</section>
 
 				<section>
@@ -176,13 +176,13 @@
 		</div>
 
 		<script src="../dist/reveal.js"></script>
+		<script src="../plugin/math/math.js"></script>
 		<script>
 			Reveal.initialize({
 				history: true,
 				transition: 'linear',
 
-				math: {
-					// mathjax: 'https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js',
+				mathjax2: {
 					config: 'TeX-AMS_HTML-full',
 					TeX: {
 						Macros: {
@@ -192,9 +192,13 @@
 					}
 				},
 
-				dependencies: [
-					{ src: '../plugin/math/math.js', async: true }
-				]
+				// There are three typesetters available
+				// RevealMath.MathJax2 (default)
+				// RevealMath.MathJax3
+				// RevealMath.KaTeX
+				//
+				// More info at https://revealjs.com/math/
+				plugins: [ RevealMath.MathJax2 ]
 			});
 		</script>
 

examples/media.html

@@ -31,11 +31,32 @@
 					<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>
@@ -47,9 +68,7 @@
 
 		<script src="../dist/reveal.js"></script>
 		<script>
-			Reveal.initialize({
-				transition: 'linear'
-			});
+			Reveal.initialize({hash: true});
 		</script>
 
 	</body>

gulpfile.js

@@ -3,18 +3,19 @@ const path = require('path')
 const glob = require('glob')
 const yargs = require('yargs')
 const colors = require('colors')
+const through = require('through2');
 const qunit = require('node-qunit-puppeteer')
 
 const {rollup} = require('rollup')
 const {terser} = require('rollup-plugin-terser')
-const babel = require('rollup-plugin-babel')
+const babel = require('@rollup/plugin-babel').default
 const commonjs = require('@rollup/plugin-commonjs')
-const resolve = require('@rollup/plugin-node-resolve')
+const resolve = require('@rollup/plugin-node-resolve').default
+const sass = require('sass')
 
 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')
@@ -23,67 +24,66 @@ const autoprefixer = require('gulp-autoprefixer')
 
 const root = yargs.argv.root || '.'
 const port = yargs.argv.port || 8000
+const host = yargs.argv.host || 'localhost'
 
 const banner = `/*!
-* reveal.js ${pkg.version} (${new Date().toDateString()})
+* reveal.js ${pkg.version}
 * ${pkg.homepage}
 * MIT licensed
 *
-* Copyright (C) 2020 Hakim El Hattab, https://hakim.se
+* Copyright (C) 2011-2023 Hakim El Hattab, https://hakim.se
 */\n`
 
 // Prevents warnings from opening too many test pages
 process.setMaxListeners(20);
 
 const babelConfig = {
-    exclude: 'node_modules/**',
+    babelHelpers: 'bundled',
+    ignore: ['node_modules'],
     compact: false,
     extensions: ['.js', '.html'],
-    plugins: ['transform-html-import-to-string'],
+    plugins: [
+        'transform-html-import-to-string'
+    ],
     presets: [[
         '@babel/preset-env',
         {
             corejs: 3,
-            useBuiltIns: 'entry',
+            useBuiltIns: 'usage',
             modules: false
         }
     ]]
 };
 
-const rollupConfig = {
-    plugins: [
-        babel( babelConfig ),
-        resolve(),
-        commonjs(),
-        terser()
-    ]
-};
-
-// Our ES module bundle only needs to support modern
-// browser features
+// 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 = { esmodules: true };
+babelConfigESM.presets[0][1].targets = { browsers: [
+    'last 2 Chrome versions',
+    'last 2 Safari versions',
+    'last 2 iOS versions',
+    'last 2 Firefox versions',
+    'last 2 Edge versions',
+] };
 
-const rollupConfigESM = {
-    plugins: [
-        babel( babelConfigESM ),
-        resolve(),
-        commonjs(),
-        terser()
-    ]
-};
-
-let rollupCache;
+let cache = {};
 
 // Creates a bundle with broad browser support, exposed
 // as UMD
 gulp.task('js-es5', () => {
     return rollup({
-        cache: rollupCache,
+        cache: cache.umd,
         input: 'js/index.js',
-        ...rollupConfig
+        plugins: [
+            resolve(),
+            commonjs(),
+            babel( babelConfig ),
+            terser()
+        ]
     }).then( bundle => {
-        rollupCache = bundle.cache;
+        cache.umd = bundle.cache;
         return bundle.write({
             name: 'Reveal',
             file: './dist/reveal.js',
@@ -97,11 +97,16 @@ gulp.task('js-es5', () => {
 // Creates an ES module bundle
 gulp.task('js-es6', () => {
     return rollup({
-        cache: rollupCache,
+        cache: cache.esm,
         input: 'js/index.js',
-        ...rollupConfigESM
+        plugins: [
+            resolve(),
+            commonjs(),
+            babel( babelConfigESM ),
+            terser()
+        ]
     }).then( bundle => {
-        rollupCache = bundle.cache;
+        cache.esm = bundle.cache;
         return bundle.write({
             file: './dist/reveal.esm.js',
             format: 'es',
@@ -124,9 +129,19 @@ gulp.task('plugins', () => {
         { name: 'RevealMath', input: './plugin/math/plugin.js', output: './plugin/math/math' },
     ].map( plugin => {
         return rollup({
+                cache: cache[plugin.input],
                 input: plugin.input,
-                ...rollupConfig
+                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,
@@ -142,12 +157,33 @@ gulp.task('plugins', () => {
     } ));
 })
 
+// a custom pipeable step to transform Sass to CSS
+function compileSass() {
+  return through.obj( ( vinylFile, encoding, callback ) => {
+    const transformedFile = vinylFile.clone();
+
+    sass.render({
+        data: transformedFile.contents.toString(),
+        file: transformedFile.path,
+    }, ( err, result ) => {
+        if( err ) {
+            callback(err);
+        }
+        else {
+            transformedFile.extname = '.css';
+            transformedFile.contents = result.css;
+            callback( null, transformedFile );
+        }
+    });
+  });
+}
+
 gulp.task('css-themes', () => gulp.src(['./css/theme/source/*.{sass,scss}'])
-        .pipe(sass())
+        .pipe(compileSass())
         .pipe(gulp.dest('./dist/theme')))
 
 gulp.task('css-core', () => gulp.src(['css/reveal.scss'])
-    .pipe(sass())
+    .pipe(compileSass())
     .pipe(autoprefixer())
     .pipe(minify({compatibility: 'ie9'}))
     .pipe(header(banner))
@@ -160,7 +196,7 @@ gulp.task('qunit', () => {
     let serverConfig = {
         root,
         port: 8009,
-        host: '0.0.0.0',
+        host: 'localhost',
         name: 'test-server'
     }
 
@@ -232,20 +268,24 @@ 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.task('package', gulp.series(() =>
 
-    gulp.src([
-        './index.html',
-        './dist/**',
-        './lib/**',
-        './images/**',
-        './plugin/**',
-        './**.md'
-    ]).pipe(zip('reveal-js-presentation.zip')).pipe(gulp.dest('./'))
+    gulp.src(
+        [
+            './index.html',
+            './dist/**',
+            './lib/**',
+            './images/**',
+            './plugin/**',
+            './**/*.md'
+        ],
+        { base: './' }
+    )
+    .pipe(zip('reveal-js-presentation.zip')).pipe(gulp.dest('./'))
 
 ))
 
-gulp.task('reload', () => gulp.src(['*.html', '*.md'])
+gulp.task('reload', () => gulp.src(['index.html'])
     .pipe(connect.reload()));
 
 gulp.task('serve', () => {
@@ -253,18 +293,23 @@ gulp.task('serve', () => {
     connect.server({
         root: root,
         port: port,
-        host: '0.0.0.0',
+        host: host,
         livereload: true
     })
 
-    gulp.watch(['*.html', '*.md'], gulp.series('reload'))
+    const slidesRoot = root.endsWith('/') ? root : root + '/'
+    gulp.watch([
+        slidesRoot + '**/*.html',
+        slidesRoot + '**/*.md',
+        `!${slidesRoot}**/node_modules/**`, // ignore node_modules
+    ], gulp.series('reload'))
 
-    gulp.watch(['js/**'], gulp.series('js', 'reload', 'test'))
+    gulp.watch(['js/**'], gulp.series('js', 'reload', 'eslint'))
 
-    gulp.watch(['plugin/**/plugin.js'], gulp.series('plugins', 'reload'))
+    gulp.watch(['plugin/**/plugin.js', 'plugin/**/*.html'], gulp.series('plugins', 'reload'))
 
     gulp.watch([
-        'css/theme/source/*.{sass,scss}',
+        'css/theme/source/**/*.{sass,scss}',
         'css/theme/template/*.{sass,scss}',
     ], gulp.series('css-themes', 'reload'))
 
@@ -275,4 +320,4 @@ gulp.task('serve', () => {
 
     gulp.watch(['test/*.html'], gulp.series('test'))
 
-})
+})

index.html

@@ -1,5 +1,5 @@
 <!doctype html>
-<html>
+<html lang="en">
 	<head>
 		<meta charset="utf-8">
 		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
@@ -8,10 +8,10 @@
 
 		<link rel="stylesheet" href="dist/reset.css">
 		<link rel="stylesheet" href="dist/reveal.css">
-		<link rel="stylesheet" href="dist/theme/black.css" id="theme">
+		<link rel="stylesheet" href="dist/theme/black.css">
 
 		<!-- Theme used for syntax highlighted code -->
-		<link rel="stylesheet" href="plugin/highlight/monokai.css" id="highlight-theme">
+		<link rel="stylesheet" href="plugin/highlight/monokai.css">
 	</head>
 	<body>
 		<div class="reveal">

js/config.js

@@ -65,6 +65,9 @@ export default {
 	// Flags if we should monitor the hash and change slides accordingly
 	respondToHashChanges: true,
 
+	// Enable support for jump-to-slide navigation shortcuts
+	jumpToSlide: true,
+
 	// Push each slide change to the browser history.  Implies `hash: true`
 	history: false,
 
@@ -73,8 +76,8 @@ export default {
 
 	// 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
+	// If you set this to 'focused', we will only capture keyboard events
+	// for embedded decks when they are in focus
 	keyboardCondition: null,
 
 	// Disables the default reveal.js slide layout (scaling and centering)
@@ -146,7 +149,10 @@ export default {
 	// Flags if speaker notes should be visible to all viewers
 	showNotes: false,
 
-	// Global override for autolaying embedded media (video/audio/iframe)
+	// Flags if slides with data-visibility="hidden" should be kep visible
+	showHiddenSlides: false,
+
+	// Global override for autoplaying 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
@@ -281,6 +287,10 @@ export default {
 	// Time before the cursor is hidden (in ms)
 	hideCursorTime: 5000,
 
+	// Should we automatmically sort and set indices for fragments
+	// at each sync? (See Reveal.sync)
+	sortFragmentsOnSync: true,
+
 	// Script dependencies to load
 	dependencies: [],
 

js/controllers/autoanimate.js

@@ -1,6 +1,9 @@
-import { queryAll, extend, createStyleSheet } from '../utils/util.js'
+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.
@@ -11,9 +14,6 @@ export default class AutoAnimate {
 
 		this.Reveal = Reveal;
 
-		// Counter used to generate unique IDs for auto-animated elements
-		this.autoAnimateCounter = 0;
-
 	}
 
 	/**
@@ -27,8 +27,16 @@ export default class AutoAnimate {
 		// 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' ) ) {
+		let allSlides = this.Reveal.getSlides();
+		let toSlideIndex = allSlides.indexOf( toSlide );
+		let fromSlideIndex = allSlides.indexOf( fromSlide );
+
+		// Ensure that both slides are auto-animate targets with the same data-auto-animate-id value
+		// (including null if absent on both) and that data-auto-animate-restart isn't set on the
+		// physically latter slide (independent of slide direction)
+		if( fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' )
+				&& fromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) 
+				&& !( toSlideIndex > fromSlideIndex ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' ) ) {
 
 			// Create a new auto-animate sheet
 			this.autoAnimateStyleSheet = this.autoAnimateStyleSheet || createStyleSheet();
@@ -40,14 +48,21 @@ export default class AutoAnimate {
 			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';
+			animationOptions.slideDirection = toSlideIndex > fromSlideIndex ? 'forward' : 'backward';
+
+			// If the from-slide is hidden because it has moved outside
+			// the view distance, we need to temporarily show it while
+			// measuring
+			let fromSlideIsHidden = fromSlide.style.display === 'none';
+			if( fromSlideIsHidden ) fromSlide.style.display = this.Reveal.getConfig().display;
 
 			// 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, this.autoAnimateCounter++ );
+				return this.autoAnimateElements( elements.from, elements.to, elements.options || {}, animationOptions, autoAnimateCounter++ );
 			} );
 
+			if( fromSlideIsHidden ) fromSlide.style.display = 'none';
+
 			// Animate unmatched elements, if enabled
 			if( toSlide.dataset.autoAnimateUnmatched !== 'false' && this.Reveal.getConfig().autoAnimateUnmatched === true ) {
 
@@ -63,7 +78,7 @@ export default class AutoAnimate {
 					// 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-' + this.autoAnimateCounter++;
+						id = 'unmatched-' + autoAnimateCounter++;
 						css.push( `[data-auto-animate="running"] [data-auto-animate-target="${id}"] { transition: opacity ${unmatchedOptions.duration}s ease ${unmatchedOptions.delay}s; }` );
 					}
 
@@ -299,8 +314,8 @@ export default class AutoAnimate {
 		options = extend( options, inheritedOptions );
 
 		// Inherit options from parent elements
-		if( element.closest && element.parentNode ) {
-			let autoAnimatedParent = element.parentNode.closest( '[data-auto-animate-target]' );
+		if( element.parentNode ) {
+			let autoAnimatedParent = closest( element.parentNode, '[data-auto-animate-target]' );
 			if( autoAnimatedParent ) {
 				options = this.getAutoAnimateOptions( autoAnimatedParent, options );
 			}
@@ -384,7 +399,14 @@ export default class AutoAnimate {
 				value = { value: style.to, explicitValue: true };
 			}
 			else {
-				value = computedStyles[style.property];
+				// Use a unitless value for line-height so that it inherits properly
+				if( style.property === 'line-height' ) {
+					value = parseFloat( computedStyles['line-height'] ) / parseFloat( computedStyles['font-size'] );
+				}
+
+				if( isNaN(value) ) {
+					value = computedStyles[style.property];
+				}
 			}
 
 			if( value !== '' ) {
@@ -439,7 +461,7 @@ export default class AutoAnimate {
 		const textNodes = 'h1, h2, h3, h4, h5, h6, p, li';
 		const mediaNodes = 'img, video, iframe';
 
-		// Eplicit matches via data-id
+		// Explicit matches via data-id
 		this.findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {
 			return node.nodeName + ':::' + node.getAttribute( 'data-id' );
 		} );
@@ -460,14 +482,13 @@ export default class AutoAnimate {
 		} );
 
 		pairs.forEach( pair => {
-
-			// Disable scale transformations on text nodes, we transiition
+			// Disable scale transformations on text nodes, we transition
 			// each individual text property instead
-			if( pair.from.matches( textNodes ) ) {
+			if( matches( pair.from, textNodes ) ) {
 				pair.options = { scale: false };
 			}
 			// Animate individual lines of code
-			else if( pair.from.matches( codeNodes ) ) {
+			else if( matches( pair.from, codeNodes ) ) {
 
 				// Transition the code block's width and height instead of scaling
 				// to prevent its content from being squished
@@ -483,7 +504,7 @@ export default class AutoAnimate {
 				} );
 
 				// Line numbers
-				this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-line[data-line-number]', node => {
+				this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-numbers[data-line-number]', node => {
 					return node.getAttribute( 'data-line-number' );
 				}, {
 					scale: false,
@@ -552,14 +573,14 @@ export default class AutoAnimate {
 
 			// Retrieve the 'from' element
 			if( fromMatches[key] ) {
-				const pimaryIndex = toMatches[key].length - 1;
+				const primaryIndex = 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( fromMatches[key][ primaryIndex ] ) {
+					fromElement = fromMatches[key][ primaryIndex ];
+					fromMatches[key][ primaryIndex ] = null;
 				}
 				// If there are no matching from-elements at the same index,
 				// use the last one.
@@ -587,7 +608,7 @@ export default class AutoAnimate {
 	 * 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
+	 * Note that parents of auto-animate targets are NOT considered
 	 * unmatched since fading them would break the auto-animation.
 	 *
 	 * @param {HTMLElement} rootElement
@@ -616,4 +637,4 @@ export default class AutoAnimate {
 
 	}
 
-}
+}

js/controllers/backgrounds.js

@@ -27,8 +27,6 @@ export default class Backgrounds {
 	 */
 	create() {
 
-		let printMode = this.Reveal.isPrintingPDF();
-
 		// Clear prior backgrounds
 		this.element.innerHTML = '';
 		this.element.classList.add( 'no-transition' );
@@ -114,9 +112,25 @@ export default class Backgrounds {
 	 */
 	sync( slide ) {
 
-		let element = slide.slideBackgroundElement,
+		const element = slide.slideBackgroundElement,
 			contentElement = slide.slideBackgroundContentElement;
 
+		const 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' ),
+			backgroundGradient: slide.getAttribute( 'data-background-gradient' ),
+			backgroundRepeat: slide.getAttribute( 'data-background-repeat' ),
+			backgroundPosition: slide.getAttribute( 'data-background-position' ),
+			backgroundTransition: slide.getAttribute( 'data-background-transition' ),
+			backgroundOpacity: slide.getAttribute( 'data-background-opacity' ),
+		};
+
+		const dataPreload = slide.hasAttribute( 'data-preload' );
+
 		// Reset the prior background state in case this is not the
 		// initial sync
 		slide.classList.remove( 'has-dark-background' );
@@ -135,22 +149,9 @@ export default class Backgrounds {
 		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]|$)/gi.test( data.background ) ) {
+			if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp|webp)([?#\s]|$)/gi.test( data.background ) ) {
 				slide.setAttribute( 'data-background-image', data.background );
 			}
 			else {
@@ -161,13 +162,14 @@ export default class Backgrounds {
 		// 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 ) {
+		if( data.background || data.backgroundColor || data.backgroundGradient || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {
 			element.setAttribute( 'data-background-hash', data.background +
 															data.backgroundSize +
 															data.backgroundImage +
 															data.backgroundVideo +
 															data.backgroundIframe +
 															data.backgroundColor +
+															data.backgroundGradient +
 															data.backgroundRepeat +
 															data.backgroundPosition +
 															data.backgroundTransition +
@@ -177,9 +179,10 @@ export default class Backgrounds {
 		// 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.backgroundGradient ) element.style.backgroundImage = data.backgroundGradient;
 		if( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );
 
-		if( slide.hasAttribute( 'data-preload' ) ) element.setAttribute( 'data-preload', '' );
+		if( dataPreload ) element.setAttribute( 'data-preload', '' );
 
 		// Background image options are set on the content wrapper
 		if( data.backgroundSize ) contentElement.style.backgroundSize = data.backgroundSize;
@@ -192,8 +195,8 @@ export default class Backgrounds {
 		// color, no class will be added
 		let contrastColor = data.backgroundColor;
 
-		// If no bg color was found, check the computed background
-		if( !contrastColor ) {
+		// If no bg color was found, or it cannot be converted by colorToRgb, check the computed background
+		if( !contrastColor || !colorToRgb( contrastColor ) ) {
 			let computedBackgroundStyle = window.getComputedStyle( element );
 			if( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {
 				contrastColor = computedBackgroundStyle.backgroundColor;
@@ -201,7 +204,7 @@ export default class Backgrounds {
 		}
 
 		if( contrastColor ) {
-			let rgb = colorToRgb( contrastColor );
+			const rgb = colorToRgb( contrastColor );
 
 			// Ignore fully transparent backgrounds. Some browsers return
 			// rgba(0,0,0,0) when reading the computed background color of
@@ -394,4 +397,10 @@ export default class Backgrounds {
 
 	}
 
-}
+	destroy() {
+
+		this.element.remove();
+
+	}
+
+}

js/controllers/controls.js

@@ -188,6 +188,13 @@ export default class Controls {
 		}
 	}
 
+	destroy() {
+
+		this.unbind();
+		this.element.remove();
+
+	}
+
 	/**
 	 * Event handlers for navigation control buttons.
 	 */

js/controllers/focus.js

@@ -1,3 +1,5 @@
+import { closest } from '../utils/util.js'
+
 /**
  * Manages focus when a presentation is embedded. This
  * helps us only capture keyboard from the presentation
@@ -77,6 +79,12 @@ export default class Focus {
 
 	}
 
+	destroy() {
+
+		this.Reveal.getRevealElement().classList.remove( 'focused' );
+
+	}
+
 	onRevealPointerDown( event ) {
 
 		this.focus();
@@ -85,7 +93,7 @@ export default class Focus {
 
 	onDocumentPointerDown( event ) {
 
-		let revealElement = event.target.closest( '.reveal' );
+		let revealElement = closest( event.target, '.reveal' );
 		if( !revealElement || revealElement !== this.Reveal.getRevealElement() ) {
 			this.blur();
 		}

js/controllers/fragments.js

@@ -235,6 +235,7 @@ export default class Fragments {
 						el.classList.remove( 'current-fragment' );
 
 						if( wasVisible ) {
+							this.Reveal.slideContent.stopEmbeddedContent( el );
 							changedFragments.hidden.push( el );
 							this.Reveal.dispatchEvent({
 								target: el,

js/controllers/jumptoslide.js

@@ -0,0 +1,170 @@
+/**
+ * Makes it possible to jump to a slide by entering its
+ * slide number or id.
+ */
+export default class JumpToSlide {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+		this.onInput = this.onInput.bind( this );
+		this.onBlur = this.onBlur.bind( this );
+		this.onKeyDown = this.onKeyDown.bind( this );
+
+	}
+
+	render() {
+
+		this.element = document.createElement( 'div' );
+		this.element.className = 'jump-to-slide';
+
+    this.jumpInput = document.createElement( 'input' );
+    this.jumpInput.type = 'text';
+    this.jumpInput.className = 'jump-to-slide-input';
+    this.jumpInput.placeholder = 'Jump to slide';
+		this.jumpInput.addEventListener( 'input', this.onInput );
+		this.jumpInput.addEventListener( 'keydown', this.onKeyDown );
+		this.jumpInput.addEventListener( 'blur', this.onBlur );
+
+    this.element.appendChild( this.jumpInput );
+
+	}
+
+	show() {
+
+		this.indicesOnShow = this.Reveal.getIndices();
+
+		this.Reveal.getRevealElement().appendChild( this.element );
+		this.jumpInput.focus();
+
+	}
+
+	hide() {
+
+		if( this.isVisible() ) {
+			this.element.remove();
+			this.jumpInput.value = '';
+
+			clearTimeout( this.jumpTimeout );
+			delete this.jumpTimeout;
+		}
+
+	}
+
+	isVisible() {
+
+		return !!this.element.parentNode;
+
+	}
+
+	/**
+	 * Parses the current input and jumps to the given slide.
+	 */
+	jump() {
+
+		clearTimeout( this.jumpTimeout );
+		delete this.jumpTimeout;
+
+		const query = this.jumpInput.value.trim( '' );
+		let indices = this.Reveal.location.getIndicesFromHash( query, { oneBasedIndex: true } );
+
+		// If no valid index was found and the input query is a
+		// string, fall back on a simple search
+		if( !indices && /\S+/i.test( query ) && query.length > 1 ) {
+			indices = this.search( query );
+		}
+
+		if( indices && query !== '' ) {
+			this.Reveal.slide( indices.h, indices.v, indices.f );
+			return true;
+		}
+		else {
+			this.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f );
+			return false;
+		}
+
+	}
+
+	jumpAfter( delay ) {
+
+		clearTimeout( this.jumpTimeout );
+		this.jumpTimeout = setTimeout( () => this.jump(), delay );
+
+	}
+
+	/**
+	 * A lofi search that looks for the given query in all
+	 * of our slides and returns the first match.
+	 */
+	search( query ) {
+
+		const regex = new RegExp( '\\b' + query.trim() + '\\b', 'i' );
+
+		const slide = this.Reveal.getSlides().find( ( slide ) => {
+			return regex.test( slide.innerText );
+		} );
+
+		if( slide ) {
+			return this.Reveal.getIndices( slide );
+		}
+		else {
+			return null;
+		}
+
+	}
+
+	/**
+	 * Reverts back to the slide we were on when jump to slide was
+	 * invoked.
+	 */
+	cancel() {
+
+		this.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f );
+		this.hide();
+
+	}
+
+	confirm() {
+
+		this.jump();
+		this.hide();
+
+	}
+
+	destroy() {
+
+		this.jumpInput.removeEventListener( 'input', this.onInput );
+		this.jumpInput.removeEventListener( 'keydown', this.onKeyDown );
+		this.jumpInput.removeEventListener( 'blur', this.onBlur );
+
+		this.element.remove();
+
+	}
+
+	onKeyDown( event ) {
+
+		if( event.keyCode === 13 ) {
+			this.confirm();
+		}
+		else if( event.keyCode === 27 ) {
+			this.cancel();
+
+			event.stopImmediatePropagation();
+		}
+
+	}
+
+	onInput( event ) {
+
+		this.jumpAfter( 200 );
+
+	}
+
+	onBlur() {
+
+		setTimeout( () => this.hide(), 1 );
+
+	}
+
+}

js/controllers/keyboard.js

@@ -32,17 +32,18 @@ export default class Keyboard {
 		}
 		else {
 			this.shortcuts['N  ,  SPACE']   = 'Next slide';
-			this.shortcuts['P']             = 'Previous slide';
+			this.shortcuts['P  ,  Shift SPACE']             = '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['Alt + ←/&#8593/→/↓']        = 'Navigate without fragments';
+		this.shortcuts['Shift + ←/&#8593/→/↓']      = 'Jump to first/last slide';
 		this.shortcuts['B  ,  .']                       = 'Pause';
 		this.shortcuts['F']                             = 'Fullscreen';
+		this.shortcuts['G']                             = 'Jump to slide';
 		this.shortcuts['ESC, O']                        = 'Slide overview';
 
 	}
@@ -182,13 +183,11 @@ export default class Keyboard {
 		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;
+		// Whitelist certain modifiers for slide navigation shortcuts
+		let isNavigationKey = [32, 37, 38, 39, 40, 78, 80].indexOf( event.keyCode ) !== -1;
 
 		// Prevent all other events when a modifier is pressed
-		let unusedModifier = 	!prevSlideShortcut && !firstSlideShortcut && !lastSlideShortcut &&
+		let unusedModifier = 	!( isNavigationKey && event.shiftKey || event.altKey ) &&
 								( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );
 
 		// Disregard the event if there's a focused element or a
@@ -277,52 +276,58 @@ export default class Keyboard {
 
 			// P, PAGE UP
 			if( keyCode === 80 || keyCode === 33 ) {
-				this.Reveal.prev();
+				this.Reveal.prev({skipFragments: event.altKey});
 			}
 			// N, PAGE DOWN
 			else if( keyCode === 78 || keyCode === 34 ) {
-				this.Reveal.next();
+				this.Reveal.next({skipFragments: event.altKey});
 			}
 			// H, LEFT
 			else if( keyCode === 72 || keyCode === 37 ) {
-				if( firstSlideShortcut ) {
+				if( event.shiftKey ) {
 					this.Reveal.slide( 0 );
 				}
 				else if( !this.Reveal.overview.isActive() && useLinearMode ) {
-					this.Reveal.prev();
+					this.Reveal.prev({skipFragments: event.altKey});
 				}
 				else {
-					this.Reveal.left();
+					this.Reveal.left({skipFragments: event.altKey});
 				}
 			}
 			// L, RIGHT
 			else if( keyCode === 76 || keyCode === 39 ) {
-				if( lastSlideShortcut ) {
-					this.Reveal.slide( Number.MAX_VALUE );
+				if( event.shiftKey ) {
+					this.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );
 				}
 				else if( !this.Reveal.overview.isActive() && useLinearMode ) {
-					this.Reveal.next();
+					this.Reveal.next({skipFragments: event.altKey});
 				}
 				else {
-					this.Reveal.right();
+					this.Reveal.right({skipFragments: event.altKey});
 				}
 			}
 			// K, UP
 			else if( keyCode === 75 || keyCode === 38 ) {
-				if( !this.Reveal.overview.isActive() && useLinearMode ) {
-					this.Reveal.prev();
+				if( event.shiftKey ) {
+					this.Reveal.slide( undefined, 0 );
+				}
+				else if( !this.Reveal.overview.isActive() && useLinearMode ) {
+					this.Reveal.prev({skipFragments: event.altKey});
 				}
 				else {
-					this.Reveal.up();
+					this.Reveal.up({skipFragments: event.altKey});
 				}
 			}
 			// J, DOWN
 			else if( keyCode === 74 || keyCode === 40 ) {
-				if( !this.Reveal.overview.isActive() && useLinearMode ) {
-					this.Reveal.next();
+				if( event.shiftKey ) {
+					this.Reveal.slide( undefined, Number.MAX_VALUE );
+				}
+				else if( !this.Reveal.overview.isActive() && useLinearMode ) {
+					this.Reveal.next({skipFragments: event.altKey});
 				}
 				else {
-					this.Reveal.down();
+					this.Reveal.down({skipFragments: event.altKey});
 				}
 			}
 			// HOME
@@ -331,7 +336,7 @@ export default class Keyboard {
 			}
 			// END
 			else if( keyCode === 35 ) {
-				this.Reveal.slide( Number.MAX_VALUE );
+				this.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );
 			}
 			// SPACE
 			else if( keyCode === 32 ) {
@@ -339,10 +344,10 @@ export default class Keyboard {
 					this.Reveal.overview.deactivate();
 				}
 				if( event.shiftKey ) {
-					this.Reveal.prev();
+					this.Reveal.prev({skipFragments: event.altKey});
 				}
 				else {
-					this.Reveal.next();
+					this.Reveal.next({skipFragments: event.altKey});
 				}
 			}
 			// TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS "BLACK SCREEN" BUTTON
@@ -359,6 +364,12 @@ export default class Keyboard {
 					this.Reveal.toggleAutoSlide( autoSlideWasPaused );
 				}
 			}
+			// G
+			else if( keyCode === 71 ) {
+				if ( config.jumpToSlide ) {
+					this.Reveal.toggleJumpToSlide();
+				}
+			}
 			else {
 				triggered = false;
 			}

js/controllers/location.js

@@ -1,10 +1,12 @@
-import { supportsHistoryAPI } from '../utils/device.js'
-
 /**
  * Reads and writes the URL based on reveal.js' current state.
  */
 export default class Location {
 
+	// The minimum number of milliseconds that must pass between
+	// calls to history.replaceState
+	MAX_REPLACE_STATE_FREQUENCY = 1000
+
 	constructor( Reveal ) {
 
 		this.Reveal = Reveal;
@@ -12,6 +14,8 @@ export default class Location {
 		// Delays updates to the URL due to a Chrome thumbnailer bug
 		this.writeURLTimeout = 0;
 
+		this.replaceStateTimestamp = 0;
+
 		this.onWindowHashChange = this.onWindowHashChange.bind( this );
 
 	}
@@ -29,24 +33,23 @@ export default class Location {
 	}
 
 	/**
-	 * Reads the current URL (hash) and navigates accordingly.
+	 * Returns the slide indices for the given hash link.
+	 *
+	 * @param {string} [hash] the hash string that we want to
+	 * find the indices for
+	 *
+	 * @returns slide indices or null
 	 */
-	readURL() {
-
-		let config = this.Reveal.getConfig();
-		let indices = this.Reveal.getIndices();
-		let currentSlide = this.Reveal.getCurrentSlide();
-
-		let hash = window.location.hash;
+	getIndicesFromHash( hash=window.location.hash, options={} ) {
 
 		// Attempt to parse the hash as either an index or name
-		let bits = hash.slice( 2 ).split( '/' ),
-			name = hash.replace( /#\/?/gi, '' );
+		let name = hash.replace( /^#\/?/, '' );
+		let bits = name.split( '/' );
 
 		// 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 slide;
 
 			let f;
 
@@ -59,28 +62,19 @@ export default class Location {
 
 			// Ensure the named link is a valid HTML ID attribute
 			try {
-				element = document.getElementById( decodeURIComponent( name ) );
+				slide = document
+					.getElementById( decodeURIComponent( name ) )
+					.closest('.slides>section, .slides>section>section');
 			}
 			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 );
+			if( slide ) {
+				return { ...this.Reveal.getIndices( slide ), f };
 			}
 		}
 		else {
-			let hashIndexBase = config.hashOneBasedIndex ? 1 : 0;
+			const config = this.Reveal.getConfig();
+			let hashIndexBase = config.hashOneBasedIndex || options.oneBasedIndex ? 1 : 0;
 
 			// Read the index components of the hash
 			let h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,
@@ -94,10 +88,32 @@ export default class Location {
 				}
 			}
 
-			if( h !== indices.h || v !== indices.v || f !== undefined ) {
-				this.Reveal.slide( h, v, f );
+			return { h, v, f };
+		}
+
+		// The hash couldn't be parsed or no matching named link was found
+		return null
+
+	}
+
+	/**
+	 * Reads the current URL (hash) and navigates accordingly.
+	 */
+	readURL() {
+
+		const currentIndices = this.Reveal.getIndices();
+		const newIndices = this.getIndicesFromHash();
+
+		if( newIndices ) {
+			if( ( newIndices.h !== currentIndices.h || newIndices.v !== currentIndices.v || newIndices.f !== undefined ) ) {
+					this.Reveal.slide( newIndices.h, newIndices.v, newIndices.f );
 			}
 		}
+		// If no new indices are available, we're trying to navigate to
+		// a slide hash that does not exist
+		else {
+			this.Reveal.slide( currentIndices.h || 0, currentIndices.v || 0 );
+		}
 
 	}
 
@@ -121,15 +137,24 @@ export default class Location {
 			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 || supportsHistoryAPI === false ) {
-				window.location.hash = this.getHash();
+			// API is not available.
+			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 ) {
-				window.history.replaceState( null, null, '#' + this.getHash() );
+				// If the hash is empty, don't add it to the URL
+				if( hash === '/' ) {
+					this.debouncedReplaceState( window.location.pathname + window.location.search );
+				}
+				else {
+					this.debouncedReplaceState( '#' + hash );
+				}
 			}
 			// UPDATE: The below nuking of all hash changes breaks
 			// anchors on pages where reveal.js is running. Removed
@@ -141,6 +166,27 @@ export default class Location {
 			// else {
 			// 	window.history.replaceState( null, null, window.location.pathname + window.location.search );
 			// }
+
+		}
+
+	}
+
+	replaceState( url ) {
+
+		window.history.replaceState( null, null, url );
+		this.replaceStateTimestamp = Date.now();
+
+	}
+
+	debouncedReplaceState( url ) {
+
+		clearTimeout( this.replaceStateTimeout );
+
+		if( Date.now() - this.replaceStateTimestamp > this.MAX_REPLACE_STATE_FREQUENCY ) {
+			this.replaceState( url );
+		}
+		else {
+			this.replaceStateTimeout = setTimeout( () => this.replaceState( url ), this.MAX_REPLACE_STATE_FREQUENCY );
 		}
 
 	}

js/controllers/notes.js

@@ -1,5 +1,5 @@
 /**
- * Handles the showing and 
+ * Handles the showing of speaker notes
  */
 export default class Notes {
 
@@ -54,7 +54,7 @@ export default class Notes {
 	 */
 	updateVisibility() {
 
-		if( this.Reveal.getConfig().showNotes && this.hasNotes() ) {
+		if( this.Reveal.getConfig().showNotes && this.hasNotes() && !this.Reveal.print.isPrintingPDF() ) {
 			this.Reveal.getRevealElement().classList.add( 'show-notes' );
 		}
 		else {
@@ -89,7 +89,7 @@ export default class Notes {
 	 * 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
+	 * 2. With <aside class="notes"> elements inside the slide
 	 *
 	 * @param {HTMLElement} [slide=currentSlide]
 	 * @return {(string|null)}
@@ -101,14 +101,20 @@ export default class Notes {
 			return slide.getAttribute( 'data-notes' );
 		}
 
-		// ... or using an <aside class="notes"> element
-		let notesElement = slide.querySelector( 'aside.notes' );
-		if( notesElement ) {
-			return notesElement.innerHTML;
+		// ... or using <aside class="notes"> elements
+		let notesElements = slide.querySelectorAll( 'aside.notes' );
+		if( notesElements ) {
+			return Array.from(notesElements).map( notesElement => notesElement.innerHTML ).join( '\n' );
 		}
 
 		return null;
 
 	}
 
+	destroy() {
+
+		this.element.remove();
+
+	}
+
 }

js/controllers/plugins.js

@@ -12,7 +12,7 @@ export default class Plugins {
 		// Flags our current state (idle -> loading -> loaded)
 		this.state = 'idle';
 
-		// An id:instance map of currently registed plugins
+		// An id:instance map of currently registered plugins
 		this.registeredPlugins = {};
 
 		this.asyncDependencies = [];
@@ -171,7 +171,7 @@ export default class Plugins {
 	/**
 	 * Registers a new plugin with this reveal.js instance.
 	 *
-	 * reveal.js waits for all regisered plugins to initialize
+	 * reveal.js waits for all registered plugins to initialize
 	 * before considering itself ready, as long as the plugin
 	 * is registered before calling `Reveal.initialize()`.
 	 */
@@ -238,4 +238,17 @@ export default class Plugins {
 
 	}
 
+	destroy() {
+
+		Object.values( this.registeredPlugins ).forEach( plugin => {
+			if( typeof plugin.destroy === 'function' ) {
+				plugin.destroy();
+			}
+		} );
+
+		this.registeredPlugins = {};
+		this.asyncDependencies = [];
+
+	}
+
 }

js/controllers/pointer.js

@@ -75,6 +75,17 @@ export default class Pointer {
 
 	}
 
+	destroy() {
+
+		this.showCursor();
+
+		document.removeEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false );
+		document.removeEventListener( 'mousewheel', this.onDocumentMouseScroll, false );
+		document.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );
+		document.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );
+
+	}
+
 	/**
 	 * Called whenever there is mouse input at the document level
 	 * to determine if the cursor is active or not.

js/controllers/print.js

@@ -16,20 +16,26 @@ export default class Print {
 	 * Configures the presentation for printing to a static
 	 * PDF.
 	 */
-	setupPDF() {
+	async setupPDF() {
 
-		let config = this.Reveal.getConfig();
+		const config = this.Reveal.getConfig();
+		const slides = queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR )
 
-		let slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );
+		// Compute slide numbers now, before we start duplicating slides
+		const injectPageNumbers = config.slideNumber && /all|print/i.test( config.showSlideNumber );
+
+		const slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );
 
 		// Dimensions of the PDF pages
-		let pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),
+		const 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,
+		const slideWidth = slideSize.width,
 			slideHeight = slideSize.height;
 
+		await new Promise( requestAnimationFrame );
+
 		// Let the browser know what page size we want to print
 		createStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );
 
@@ -40,26 +46,39 @@ export default class Print {
 		document.body.style.width = pageWidth + 'px';
 		document.body.style.height = pageHeight + 'px';
 
+		const viewportElement = document.querySelector( '.reveal-viewport' );
+		let presentationBackground;
+		if( viewportElement ) {
+			const viewportStyles = window.getComputedStyle( viewportElement );
+			if( viewportStyles && viewportStyles.background ) {
+				presentationBackground = viewportStyles.background;
+			}
+		}
+
 		// Make sure stretch elements fit on slide
+		await new Promise( requestAnimationFrame );
 		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 );
+		// Batch scrollHeight access to prevent layout thrashing
+		await new Promise( requestAnimationFrame );
+
+		const slideScrollHeights = slides.map( slide => slide.scrollHeight );
+
+		const pages = [];
+		const pageContainer = slides[0].parentNode;
+		let slideNumber = 1;
 
 		// Slide and slide background layout
-		queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( function( slide ) {
+		slides.forEach( function( slide, index ) {
 
 			// 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 left = ( pageWidth - slideWidth ) / 2;
+				let top = ( pageHeight - slideHeight ) / 2;
 
-				let contentHeight = slide.scrollHeight;
+				const contentHeight = slideScrollHeights[ index ];
 				let numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );
 
 				// Adhere to configured pages per slide limit
@@ -72,10 +91,18 @@ export default class Print {
 
 				// Wrap the slide in a page element and hide its overflow
 				// so that no page ever flows onto another
-				let page = document.createElement( 'div' );
+				const page = document.createElement( 'div' );
+				pages.push( page );
+
 				page.className = 'pdf-page';
 				page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';
-				slide.parentNode.insertBefore( page, slide );
+
+				// Copy the presentation-wide background to each individual
+				// page when printing
+				if( presentationBackground ) {
+					page.style.background = presentationBackground;
+				}
+
 				page.appendChild( slide );
 
 				// Position the slide inside of the page
@@ -83,6 +110,8 @@ export default class Print {
 				slide.style.top = top + 'px';
 				slide.style.width = slideWidth + 'px';
 
+				this.Reveal.slideContent.layout( slide );
+
 				if( slide.slideBackgroundElement ) {
 					page.insertBefore( slide.slideBackgroundElement, slide );
 				}
@@ -91,19 +120,19 @@ export default class Print {
 				if( config.showNotes ) {
 
 					// Are there notes for this slide?
-					let notes = getSlideNotes( slide );
+					const notes = this.Reveal.getSlideNotes( slide );
 					if( notes ) {
 
-						let notesSpacing = 8;
-						let notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
-						let notesElement = document.createElement( 'div' );
+						const notesSpacing = 8;
+						const notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
+						const 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 );
+							pages.push( notesElement );
 						}
 						else {
 							notesElement.style.left = notesSpacing + 'px';
@@ -116,12 +145,12 @@ export default class Print {
 
 				}
 
-				// Inject slide numbers if `slideNumbers` are enabled
-				if( doingSlideNumbers ) {
-					let numberElement = document.createElement( 'div' );
+				// Inject page numbers if `slideNumbers` are enabled
+				if( injectPageNumbers ) {
+					const numberElement = document.createElement( 'div' );
 					numberElement.classList.add( 'slide-number' );
 					numberElement.classList.add( 'slide-number-pdf' );
-					numberElement.innerHTML = slide.getAttribute( 'data-slide-number' );
+					numberElement.innerHTML = slideNumber++;
 					page.appendChild( numberElement );
 				}
 
@@ -131,12 +160,11 @@ export default class Print {
 					// 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 );
+					const fragmentGroups = this.Reveal.fragments.sort( page.querySelectorAll( '.fragment' ), true );
 
 					let previousFragmentStep;
-					let previousPage;
 
-					fragmentGroups.forEach( function( fragments ) {
+					fragmentGroups.forEach( function( fragments, index ) {
 
 						// Remove 'current-fragment' from the previous group
 						if( previousFragmentStep ) {
@@ -151,11 +179,18 @@ export default class Print {
 						}, this );
 
 						// Create a separate page for the current fragment state
-						let clonedPage = page.cloneNode( true );
-						page.parentNode.insertBefore( clonedPage, ( previousPage || page ).nextSibling );
+						const clonedPage = page.cloneNode( true );
+
+						// Inject unique page numbers for fragments
+						if( injectPageNumbers ) {
+							const numberElement = clonedPage.querySelector( '.slide-number-pdf' );
+							const fragmentNumber = index + 1;
+							numberElement.innerHTML += '.' + fragmentNumber;
+						}
+
+						pages.push( clonedPage );
 
 						previousFragmentStep = fragments;
-						previousPage = clonedPage;
 
 					}, this );
 
@@ -178,6 +213,13 @@ export default class Print {
 
 		}, this );
 
+		await new Promise( requestAnimationFrame );
+
+		pages.forEach( page => pageContainer.appendChild( page ) );
+
+		// Re-run JS-based content layout after the slide is added to page DOM
+		this.Reveal.slideContent.layout( this.Reveal.getSlidesElement() );
+
 		// Notify subscribers that the PDF layout is good to go
 		this.Reveal.dispatchEvent({ type: 'pdf-ready' });
 
@@ -192,4 +234,4 @@ export default class Print {
 
 	}
 
-}
+}

js/controllers/progress.js

@@ -55,7 +55,14 @@ export default class Progress {
 		// Update progress if enabled
 		if( this.Reveal.getConfig().progress && this.bar ) {
 
-			this.bar.style.transform = 'scaleX('+ this.Reveal.getProgress() +')';
+			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 +')';
 
 		}
 
@@ -81,16 +88,23 @@ export default class Progress {
 
 		event.preventDefault();
 
-		let slidesTotal = this.Reveal.getHorizontalSlides().length;
+		let slides = this.Reveal.getSlides();
+		let slidesTotal = slides.length;
 		let slideIndex = Math.floor( ( event.clientX / this.getMaxWidth() ) * slidesTotal );
 
 		if( this.Reveal.getConfig().rtl ) {
 			slideIndex = slidesTotal - slideIndex;
 		}
 
-		this.Reveal.slide( slideIndex );
+		let targetIndices = this.Reveal.getIndices(slides[slideIndex]);
+		this.Reveal.slide( targetIndices.h, targetIndices.v );
 
 	}
 
+	destroy() {
+
+		this.element.remove();
+
+	}
 
 }

js/controllers/slidecontent.js

@@ -1,7 +1,8 @@
-import { HORIZONTAL_SLIDES_SELECTOR, VERTICAL_SLIDES_SELECTOR } from '../utils/constants.js'
-import { extend, queryAll, closestParent } from '../utils/util.js'
+import { extend, queryAll, closest, getMimeTypeFromFile, encodeRFC3986URI } 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.
@@ -68,6 +69,11 @@ export default class SlideContent {
 				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 ) {
@@ -95,7 +101,18 @@ export default class SlideContent {
 
 				// Images
 				if( backgroundImage ) {
-					backgroundContent.style.backgroundImage = 'url('+ encodeURI( backgroundImage ) +')';
+					// base64
+					if(  /^data:/.test( backgroundImage.trim() ) ) {
+						backgroundContent.style.backgroundImage = `url(${backgroundImage.trim()})`;
+					}
+					// URL(s)
+					else {
+						backgroundContent.style.backgroundImage = backgroundImage.split( ',' ).map( background => {
+							// Decode URL(s) that are already encoded first
+							let decoded = decodeURI(background.trim());
+							return `url(${encodeRFC3986URI(decoded)})`;
+						}).join( ',' );
+					}
 				}
 				// Videos
 				else if ( backgroundVideo && !this.Reveal.isSpeakerNotes() ) {
@@ -109,18 +126,25 @@ export default class SlideContent {
 						video.muted = true;
 					}
 
-					// Inline video playback works (at least in Mobile Safari) as
-					// long as the video is muted and the `playsinline` attribute is
-					// present
+					// 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.autoplay = true;
 						video.setAttribute( 'playsinline', '' );
 					}
 
 					// Support comma separated lists of video sources
 					backgroundVideo.split( ',' ).forEach( source => {
-						video.innerHTML += '<source src="'+ source +'">';
+						let type = getMimeTypeFromFile( source );
+						if( type ) {
+							video.innerHTML += `<source src="${source}" type="${type}">`;
+						}
+						else {
+							video.innerHTML += `<source src="${source}">`;
+						}
 					} );
 
 					backgroundContent.appendChild( video );
@@ -159,6 +183,27 @@ export default class SlideContent {
 
 		}
 
+		this.layout( slide );
+
+	}
+
+	/**
+	 * Applies JS-dependent layout helpers for the scope.
+	 */
+	layout( scopeElement ) {
+
+		// 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( scopeElement.querySelectorAll( '.r-fit-text' ) ).forEach( element => {
+			fitty( element, {
+				minSize: 24,
+				maxSize: this.Reveal.getConfig().height * 0.8,
+				observeMutations: false,
+				observeWindow: false
+			} );
+		} );
+
 	}
 
 	/**
@@ -240,7 +285,7 @@ export default class SlideContent {
 
 			// HTML5 media elements
 			queryAll( element, 'video, audio' ).forEach( el => {
-				if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
+				if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
 					return;
 				}
 
@@ -250,7 +295,7 @@ export default class SlideContent {
 				// If no global setting is available, fall back on the element's
 				// own autoplay setting
 				if( typeof autoplay !== 'boolean' ) {
-					autoplay = el.hasAttribute( 'data-autoplay' ) || !!closestParent( el, '.slide-background' );
+					autoplay = el.hasAttribute( 'data-autoplay' ) || !!closest( el, '.slide-background' );
 				}
 
 				if( autoplay && typeof el.play === 'function' ) {
@@ -288,7 +333,7 @@ export default class SlideContent {
 
 			// Normal iframes
 			queryAll( element, 'iframe[src]' ).forEach( el => {
-				if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
+				if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
 					return;
 				}
 
@@ -297,7 +342,7 @@ export default class SlideContent {
 
 			// Lazy loading iframes
 			queryAll( element, 'iframe[data-src]' ).forEach( el => {
-				if( closestParent( el, '.fragment' ) && !closestParent( el, '.fragment.visible' ) ) {
+				if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
 					return;
 				}
 
@@ -320,8 +365,8 @@ export default class SlideContent {
 	 */
 	startEmbeddedMedia( event ) {
 
-		let isAttachedToDOM = !!closestParent( event.target, 'html' ),
-			isVisible  		= !!closestParent( event.target, '.present' );
+		let isAttachedToDOM = !!closest( event.target, 'html' ),
+			isVisible  		= !!closest( event.target, '.present' );
 
 		if( isAttachedToDOM && isVisible ) {
 			event.target.currentTime = 0;
@@ -344,8 +389,8 @@ export default class SlideContent {
 
 		if( iframe && iframe.contentWindow ) {
 
-			let isAttachedToDOM = !!closestParent( event.target, 'html' ),
-				isVisible  		= !!closestParent( event.target, '.present' );
+			let isAttachedToDOM = !!closest( event.target, 'html' ),
+				isVisible  		= !!closest( event.target, '.present' );
 
 			if( isAttachedToDOM && isVisible ) {
 
@@ -355,7 +400,7 @@ export default class SlideContent {
 				// If no global setting is available, fall back on the element's
 				// own autoplay setting
 				if( typeof autoplay !== 'boolean' ) {
-					autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closestParent( iframe, '.slide-background' );
+					autoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closest( iframe, '.slide-background' );
 				}
 
 				// YouTube postMessage API
@@ -432,4 +477,4 @@ export default class SlideContent {
 
 	}
 
-}
+}

js/controllers/slidenumber.js

@@ -72,17 +72,20 @@ export default class SlideNumber {
 				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 ) + 1 );
+					value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset );
 					break;
 				case 'c/t':
-					value.push( this.Reveal.getSlidePastCount( slide ) + 1, '/', this.Reveal.getTotalSlides() );
+					value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset, '/', this.Reveal.getTotalSlides() );
 					break;
 				default:
 					let indices = this.Reveal.getIndices( slide );
-					value.push( indices.h + 1 );
+					value.push( indices.h + horizontalOffset );
 					let sep = format === 'h/v' ? '/' : '.';
 					if( this.Reveal.isVerticalSlide( slide ) ) value.push( sep, indices.v + 1 );
 			}
@@ -120,4 +123,10 @@ export default class SlideNumber {
 
 	}
 
+	destroy() {
+
+		this.element.remove();
+
+	}
+
 }

js/controllers/touch.js

@@ -1,4 +1,5 @@
 import { isAndroid } from '../utils/device.js'
+import { matches } from '../utils/util.js'
 
 const SWIPE_THRESHOLD = 40;
 
@@ -82,6 +83,9 @@ export default class Touch {
 	 */
 	isSwipePrevented( target ) {
 
+		// Prevent accidental swipes when scrubbing timelines
+		if( matches( target, 'video, audio' ) ) return true;
+
 		while( target && typeof target.hasAttribute === 'function' ) {
 			if( target.hasAttribute( 'data-prevent-swipe' ) ) return true;
 			target = target.parentNode;

js/index.js

@@ -45,12 +45,14 @@ Reveal.initialize = options => {
  * queuing up premature API calls and invoking all
  * of them when Reveal.initialize is called.
  */
-[ 'on', 'off', 'addEventListener', 'removeEventListener', 'registerPlugin' ].forEach( method => {
+[ 'configure', 'on', 'off', 'addEventListener', 'removeEventListener', 'registerPlugin' ].forEach( method => {
 	Reveal[method] = ( ...args ) => {
 		enqueuedAPICalls.push( deck => deck[method].call( null, ...args ) );
 	}
 } );
 
+Reveal.isReady = () => false;
+
 Reveal.VERSION = VERSION;
 
 export default Reveal;

js/reveal.js

@@ -1,5 +1,6 @@
 import SlideContent from './controllers/slidecontent.js'
 import SlideNumber from './controllers/slidenumber.js'
+import JumpToSlide from './controllers/jumptoslide.js'
 import Backgrounds from './controllers/backgrounds.js'
 import AutoAnimate from './controllers/autoanimate.js'
 import Fragments from './controllers/fragments.js'
@@ -26,14 +27,14 @@ import {
 } from './utils/constants.js'
 
 // The reveal.js version
-export const VERSION = '4.0.0';
+export const VERSION = '4.6.0';
 
 /**
  * reveal.js
  * https://revealjs.com
  * MIT licensed
  *
- * Copyright (C) 2020 Hakim El Hattab, https://hakim.se
+ * Copyright (C) 2011-2022 Hakim El Hattab, https://hakim.se
  */
 export default function( revealElement, options ) {
 
@@ -47,7 +48,7 @@ export default function( revealElement, options ) {
 	const Reveal = {};
 
 	// Configuration defaults, can be overridden at initialization time
-	let config,
+	let config = {},
 
 		// Flags if reveal.js is loaded (has dispatched the 'ready' event)
 		ready = false,
@@ -101,6 +102,7 @@ export default function( revealElement, options ) {
 		// may be multiple presentations running in parallel.
 		slideContent = new SlideContent( Reveal ),
 		slideNumber = new SlideNumber( Reveal ),
+		jumpToSlide = new JumpToSlide( Reveal ),
 		autoAnimate = new AutoAnimate( Reveal ),
 		backgrounds = new Backgrounds( Reveal ),
 		fragments = new Fragments( Reveal ),
@@ -121,12 +123,22 @@ export default function( revealElement, options ) {
 	 */
 	function initialize( initOptions ) {
 
+		if( !revealElement ) throw 'Unable to find presentation root (<div class="reveal">).';
+
 		// Cache references to key DOM elements
 		dom.wrapper = revealElement;
 		dom.slides = revealElement.querySelector( '.slides' );
 
-		// Compose our config object
-		config = { ...defaultConfig, ...options, ...initOptions, ...Util.getQueryHash() };
+		if( !dom.slides ) throw 'Unable to find slides container (<div class="slides">).';
+
+		// Compose our config object in order of increasing precedence:
+		// 1. Default reveal.js options
+		// 2. Options provided via Reveal.configure() prior to
+		//    initialization
+		// 3. Options passed to the Reveal constructor
+		// 4. Options passed to Reveal.initialize
+		// 5. Query params
+		config = { ...defaultConfig, ...config, ...options, ...initOptions, ...Util.getQueryHash() };
 
 		setViewport();
 
@@ -148,7 +160,7 @@ export default function( revealElement, options ) {
 
 		// Embedded decks use the reveal element as their viewport
 		if( config.embedded === true ) {
-			dom.viewport = revealElement.closest( '.reveal-viewport' ) || revealElement;
+			dom.viewport = Util.closest( revealElement, '.reveal-viewport' ) || revealElement;
 		}
 		// Full-page decks use the body as their viewport
 		else {
@@ -168,6 +180,9 @@ export default function( revealElement, options ) {
 
 		ready = true;
 
+		// Remove slides hidden with data-visibility
+		removeHiddenSlides();
+
 		// Make sure we've got all the DOM elements we need
 		setupDOM();
 
@@ -177,6 +192,9 @@ export default function( revealElement, options ) {
 		// Prevent the slides from being scrolled out of view
 		setupScrollPrevention();
 
+		// Adds bindings for fullscreen mode
+		setupFullscreen();
+
 		// Resets all vertical slides so that only the first is visible
 		resetVerticalSlides();
 
@@ -225,6 +243,24 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Removes all slides with data-visibility="hidden". This
+	 * is done right before the rest of the presentation is
+	 * initialized.
+	 *
+	 * If you want to show all hidden slides, initialize
+	 * reveal.js with showHiddenSlides set to true.
+	 */
+	function removeHiddenSlides() {
+
+		if( !config.showHiddenSlides ) {
+			Util.queryAll( dom.wrapper, 'section[data-visibility="hidden"]' ).forEach( slide => {
+				slide.parentNode.removeChild( slide );
+			} );
+		}
+
+	}
+
 	/**
 	 * Finds and stores references to DOM elements which are
 	 * required by the presentation. If a required element is
@@ -244,6 +280,7 @@ export default function( revealElement, options ) {
 
 		backgrounds.render();
 		slideNumber.render();
+		jumpToSlide.render();
 		controls.render();
 		progress.render();
 		notes.render();
@@ -345,6 +382,19 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * After entering fullscreen we need to force a layout to
+	 * get our presentations to scale correctly. This behavior
+	 * is inconsistent across browsers but a force layout seems
+	 * to normalize it.
+	 */
+	function setupFullscreen() {
+
+		document.addEventListener( 'fullscreenchange', onFullscreenChange );
+		document.addEventListener( 'webkitfullscreenchange', onFullscreenChange );
+
+	}
+
 	/**
 	 * Registers a listener to postMessage events, this makes it
 	 * possible to call all reveal.js API methods from another
@@ -358,32 +408,7 @@ export default function( revealElement, options ) {
 	function setupPostMessage() {
 
 		if( config.postMessage ) {
-			window.addEventListener( 'message', event => {
-				let data = event.data;
-
-				// Make sure we're dealing with JSON
-				if( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {
-					data = JSON.parse( data );
-
-					// Check if the requested method can be found
-					if( data.method && typeof Reveal[data.method] === 'function' ) {
-
-						if( POST_MESSAGE_METHOD_BLACKLIST.test( data.method ) === false ) {
-
-							const result = Reveal[data.method].apply( Reveal, data.args );
-
-							// Dispatch a postMessage event with the returned value from
-							// our method invocation for getter functions
-							dispatchPostMessage( 'callback', { method: data.method, result: result } );
-
-						}
-						else {
-							console.warn( 'reveal.js: "'+ data.method +'" is is blacklisted from the postMessage API' );
-						}
-
-					}
-				}
-			}, false );
+			window.addEventListener( 'message', onPostMessage, false );
 		}
 
 	}
@@ -415,6 +440,10 @@ export default function( revealElement, options ) {
 		dom.wrapper.setAttribute( 'data-transition-speed', config.transitionSpeed );
 		dom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition );
 
+		// Expose our configured slide dimensions as custom props
+		dom.viewport.style.setProperty( '--slide-width', config.width + 'px' );
+		dom.viewport.style.setProperty( '--slide-height', config.height + 'px' );
+
 		if( config.shuffle ) {
 			shuffle();
 		}
@@ -494,6 +523,7 @@ export default function( revealElement, options ) {
 		controls.bind();
 		focus.bind();
 
+		dom.slides.addEventListener( 'click', onSlidesClicked, false );
 		dom.slides.addEventListener( 'transitionend', onTransitionEnd, false );
 		dom.pauseOverlay.addEventListener( 'click', resume, false );
 
@@ -519,11 +549,72 @@ export default function( revealElement, options ) {
 
 		window.removeEventListener( 'resize', onWindowResize, false );
 
+		dom.slides.removeEventListener( 'click', onSlidesClicked, false );
 		dom.slides.removeEventListener( 'transitionend', onTransitionEnd, false );
 		dom.pauseOverlay.removeEventListener( 'click', resume, false );
 
 	}
 
+	/**
+	 * Uninitializes reveal.js by undoing changes made to the
+	 * DOM and removing all event listeners.
+	 */
+	function destroy() {
+
+		removeEventListeners();
+		cancelAutoSlide();
+		disablePreviewLinks();
+
+		// Destroy controllers
+		notes.destroy();
+		focus.destroy();
+		plugins.destroy();
+		pointer.destroy();
+		controls.destroy();
+		progress.destroy();
+		backgrounds.destroy();
+		slideNumber.destroy();
+		jumpToSlide.destroy();
+
+		// Remove event listeners
+		document.removeEventListener( 'fullscreenchange', onFullscreenChange );
+		document.removeEventListener( 'webkitfullscreenchange', onFullscreenChange );
+		document.removeEventListener( 'visibilitychange', onPageVisibilityChange, false );
+		window.removeEventListener( 'message', onPostMessage, false );
+		window.removeEventListener( 'load', layout, false );
+
+		// Undo DOM changes
+		if( dom.pauseOverlay ) dom.pauseOverlay.remove();
+		if( dom.statusElement ) dom.statusElement.remove();
+
+		document.documentElement.classList.remove( 'reveal-full-page' );
+
+		dom.wrapper.classList.remove( 'ready', 'center', 'has-horizontal-slides', 'has-vertical-slides' );
+		dom.wrapper.removeAttribute( 'data-transition-speed' );
+		dom.wrapper.removeAttribute( 'data-background-transition' );
+
+		dom.viewport.classList.remove( 'reveal-viewport' );
+		dom.viewport.style.removeProperty( '--slide-width' );
+		dom.viewport.style.removeProperty( '--slide-height' );
+
+		dom.slides.style.removeProperty( 'width' );
+		dom.slides.style.removeProperty( 'height' );
+		dom.slides.style.removeProperty( 'zoom' );
+		dom.slides.style.removeProperty( 'left' );
+		dom.slides.style.removeProperty( 'top' );
+		dom.slides.style.removeProperty( 'bottom' );
+		dom.slides.style.removeProperty( 'right' );
+		dom.slides.style.removeProperty( 'transform' );
+
+		Array.from( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( slide => {
+			slide.style.removeProperty( 'display' );
+			slide.style.removeProperty( 'top' );
+			slide.removeAttribute( 'hidden' );
+			slide.removeAttribute( 'aria-hidden' );
+		} );
+
+	}
+
 	/**
 	 * Adds a listener to one of our custom reveal.js events,
 	 * like slidechanged.
@@ -583,6 +674,8 @@ export default function( revealElement, options ) {
 			dispatchPostMessage( type );
 		}
 
+		return event;
+
 	}
 
 	/**
@@ -809,31 +902,12 @@ export default function( revealElement, options ) {
 					transformSlides( { layout: '' } );
 				}
 				else {
-					// Zoom Scaling
-					// Content remains crisp no matter how much we scale. Side
-					// effects are minor differences in text layout and iframe
-					// viewports changing size. A 200x200 iframe viewport in a
-					// 2x zoomed presentation ends up having a 400x400 viewport.
-					if( scale > 1 && Device.supportsZoom && window.devicePixelRatio < 2 ) {
-						dom.slides.style.zoom = scale;
-						dom.slides.style.left = '';
-						dom.slides.style.top = '';
-						dom.slides.style.bottom = '';
-						dom.slides.style.right = '';
-						transformSlides( { layout: '' } );
-					}
-					// Transform Scaling
-					// Content layout remains the exact same when scaled up.
-					// Side effect is content becoming blurred, especially with
-					// high scale values on ldpi screens.
-					else {
-						dom.slides.style.zoom = '';
-						dom.slides.style.left = '50%';
-						dom.slides.style.top = '50%';
-						dom.slides.style.bottom = 'auto';
-						dom.slides.style.right = 'auto';
-						transformSlides( { layout: 'translate(-50%, -50%) scale('+ scale +')' } );
-					}
+					dom.slides.style.zoom = '';
+					dom.slides.style.left = '50%';
+					dom.slides.style.top = '50%';
+					dom.slides.style.bottom = 'auto';
+					dom.slides.style.right = 'auto';
+					transformSlides( { layout: 'translate(-50%, -50%) scale('+ scale +')' } );
 				}
 
 				// Select all slides, vertical and horizontal
@@ -875,6 +949,8 @@ export default function( revealElement, options ) {
 				}
 			}
 
+			dom.viewport.style.setProperty( '--slide-scale', scale );
+
 			progress.update();
 			backgrounds.updateParallax();
 
@@ -930,11 +1006,18 @@ export default function( revealElement, options ) {
 	 * @param {number} [presentationHeight=dom.wrapper.offsetHeight]
 	 */
 	function getComputedSlideSize( presentationWidth, presentationHeight ) {
+		let width = config.width;
+		let height = config.height;
+
+		if( config.disableLayout ) {
+			width = dom.slides.offsetWidth;
+			height = dom.slides.offsetHeight;
+		}
 
 		const size = {
 			// Slide size
-			width: config.width,
-			height: config.height,
+			width: width,
+			height: height,
 
 			// Presentation size
 			presentationWidth: presentationWidth || dom.wrapper.offsetWidth,
@@ -1118,6 +1201,20 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Toggles visibility of the jump-to-slide UI.
+	 */
+	function toggleJumpToSlide( override ) {
+
+		if( typeof override === 'boolean' ) {
+			override ? jumpToSlide.show() : jumpToSlide.hide();
+		}
+		else {
+			jumpToSlide.isVisible() ? jumpToSlide.hide() : jumpToSlide.show();
+		}
+
+	}
+
 	/**
 	 * Toggles the auto slide mode on and off.
 	 *
@@ -1157,9 +1254,22 @@ export default function( revealElement, options ) {
 	 * @param {number} [v=indexv] Vertical index of the target slide
 	 * @param {number} [f] Index of a fragment within the
 	 * target slide to activate
-	 * @param {number} [o] Origin for use in multimaster environments
+	 * @param {number} [origin] Origin for use in multimaster environments
 	 */
-	function slide( h, v, f, o ) {
+	function slide( h, v, f, origin ) {
+
+		// Dispatch an event before the slide
+		const slidechange = dispatchEvent({
+			type: 'beforeslidechange',
+			data: {
+				indexh: h === undefined ? indexh : h,
+				indexv: v === undefined ? indexv : v,
+				origin
+			}
+		});
+
+		// Abort if this slide change was prevented by an event listener
+		if( slidechange.defaultPrevented ) return;
 
 		// Remember where we were at before
 		previousSlide = currentSlide;
@@ -1220,7 +1330,10 @@ export default function( revealElement, options ) {
 			// Note 20-03-2020:
 			// This needs to happen before we update slide visibility,
 			// otherwise transitions will still run in Safari.
-			if( previousSlide.hasAttribute( 'data-auto-animate' ) && currentSlide.hasAttribute( 'data-auto-animate' ) ) {
+			if( previousSlide.hasAttribute( 'data-auto-animate' ) && currentSlide.hasAttribute( 'data-auto-animate' )
+					&& previousSlide.getAttribute( 'data-auto-animate-id' ) === currentSlide.getAttribute( 'data-auto-animate-id' )
+					&& !( ( indexh > indexhBefore || indexv > indexvBefore ) ? currentSlide : previousSlide ).hasAttribute( 'data-auto-animate-restart' ) ) {
+
 				autoAnimateTransition = true;
 				dom.slides.classList.add( 'disable-slide-transitions' );
 			}
@@ -1292,7 +1405,7 @@ export default function( revealElement, options ) {
 					indexv,
 					previousSlide,
 					currentSlide,
-					origin: o
+					origin
 				}
 			});
 		}
@@ -1304,7 +1417,11 @@ export default function( revealElement, options ) {
 		}
 
 		// Announce the current slide contents to screen readers
-		announceStatus( getStatusText( currentSlide ) );
+		// Use animation frame to prevent getComputedStyle in getStatusText
+		// from triggering layout mid-frame
+		requestAnimationFrame( () => {
+			announceStatus( getStatusText( currentSlide ) );
+		});
 
 		progress.update();
 		controls.update();
@@ -1361,7 +1478,9 @@ export default function( revealElement, options ) {
 		// Write the current hash to the URL
 		location.writeURL();
 
-		fragments.sortAll();
+		if( config.sortFragmentsOnSync === true ) {
+			fragments.sortAll();
+		}
 
 		controls.update();
 		progress.update();
@@ -1436,13 +1555,23 @@ export default function( revealElement, options ) {
 	/**
 	 * Randomly shuffles all slides in the deck.
 	 */
-	function shuffle() {
+	function shuffle( slides = getHorizontalSlides() ) {
 
-		getHorizontalSlides().forEach( ( slide, i, slides ) => {
+		slides.forEach( ( slide, i ) => {
 
-			// Insert this slide next to another random slide. This may
-			// cause the slide to insert before itself but that's fine.
-			dom.slides.insertBefore( slide, slides[ Math.floor( Math.random() * slides.length ) ] );
+			// Insert the slide next to a randomly picked sibling slide
+			// slide. This may cause the slide to insert before itself,
+			// but that's not an issue.
+			let beforeSlide = slides[ Math.floor( Math.random() * slides.length ) ];
+			if( beforeSlide.parentNode === slide.parentNode ) {
+				slide.parentNode.insertBefore( slide, beforeSlide );
+			}
+
+			// Randomize the order of vertical slides (if there are any)
+			let verticalSlides = slide.querySelectorAll( 'section' );
+			if( verticalSlides.length ) {
+				shuffle( verticalSlides );
+			}
 
 		} );
 
@@ -1469,15 +1598,20 @@ export default function( revealElement, options ) {
 			slidesLength = slides.length;
 
 		let printMode = print.isPrintingPDF();
+		let loopedForwards = false;
+		let loopedBackwards = false;
 
 		if( slidesLength ) {
 
 			// Should the index loop?
 			if( config.loop ) {
+				if( index >= slidesLength ) loopedForwards = true;
+
 				index %= slidesLength;
 
 				if( index < 0 ) {
 					index = slidesLength + index;
+					loopedBackwards = true;
 				}
 			}
 
@@ -1489,7 +1623,10 @@ export default function( revealElement, options ) {
 
 				let reverse = config.rtl && !isVerticalSlide( element );
 
-				element.classList.remove( 'past', 'present', 'future' );
+				// Avoid .remove() with multiple args for IE11 support
+				element.classList.remove( 'past' );
+				element.classList.remove( 'present' );
+				element.classList.remove( 'future' );
 
 				// http://www.w3.org/html/wg/drafts/html/master/editing.html#the-hidden-attribute
 				element.setAttribute( 'hidden', '' );
@@ -1512,10 +1649,7 @@ export default function( revealElement, options ) {
 
 					if( config.fragments ) {
 						// Show all fragments in prior slides
-						Util.queryAll( element, '.fragment' ).forEach( fragment => {
-							fragment.classList.add( 'visible' );
-							fragment.classList.remove( 'current-fragment' );
-						} );
+						showFragmentsIn( element );
 					}
 				}
 				else if( i > index ) {
@@ -1524,9 +1658,17 @@ export default function( revealElement, options ) {
 
 					if( config.fragments ) {
 						// Hide all fragments in future slides
-						Util.queryAll( element, '.fragment.visible' ).forEach( fragment => {
-							fragment.classList.remove( 'visible', 'current-fragment' );
-						} );
+						hideFragmentsIn( element );
+					}
+				}
+				// Update the visibility of fragments when a presentation loops
+				// in either direction
+				else if( i === index && config.fragments ) {
+					if( loopedForwards ) {
+						hideFragmentsIn( element );
+					}
+					else if( loopedBackwards ) {
+						showFragmentsIn( element );
 					}
 				}
 			}
@@ -1566,6 +1708,29 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Shows all fragment elements within the given contaienr.
+	 */
+	function showFragmentsIn( container ) {
+
+		Util.queryAll( container, '.fragment' ).forEach( fragment => {
+			fragment.classList.add( 'visible' );
+			fragment.classList.remove( 'current-fragment' );
+		} );
+
+	}
+
+	/**
+	 * Hides all fragment elements within the given contaienr.
+	 */
+	function hideFragmentsIn( container ) {
+
+		Util.queryAll( container, '.fragment.visible' ).forEach( fragment => {
+			fragment.classList.remove( 'visible', 'current-fragment' );
+		} );
+
+	}
+
 	/**
 	 * Optimization method; hide all slides that are far away
 	 * from the present slide.
@@ -1696,7 +1861,7 @@ export default function( revealElement, options ) {
 		}
 
 		// If includeFragments is set, a route will be considered
-		// availalbe if either a slid OR fragment is available in
+		// available if either a slid OR fragment is available in
 		// the given direction
 		if( includeFragments === true ) {
 			let fragmentRoutes = fragments.availableRoutes();
@@ -1759,7 +1924,7 @@ export default function( revealElement, options ) {
 
 			// Don't count the wrapping section for vertical slides and
 			// slides marked as uncounted
-			if( horizontalSlide.classList.contains( 'stack' ) === false && !horizontalSlide.dataset.visibility !== 'uncounted' ) {
+			if( horizontalSlide.classList.contains( 'stack' ) === false && horizontalSlide.dataset.visibility !== 'uncounted' ) {
 				pastCount++;
 			}
 
@@ -2038,11 +2203,7 @@ export default function( revealElement, options ) {
 
 		if( currentSlide && config.autoSlide !== false ) {
 
-			let fragment = currentSlide.querySelector( '.current-fragment' );
-
-			// When the slide first appears there is no "current" fragment so
-			// we look for a data-autoslide timing on the first fragment
-			if( !fragment ) fragment = currentSlide.querySelector( '.fragment' );
+			let fragment = currentSlide.querySelector( '.current-fragment[data-autoslide]' );
 
 			let fragmentAutoSlide = fragment ? fragment.getAttribute( 'data-autoslide' ) : null;
 			let parentAutoSlide = currentSlide.parentNode ? currentSlide.parentNode.getAttribute( 'data-autoslide' ) : null;
@@ -2064,21 +2225,21 @@ export default function( revealElement, options ) {
 			}
 			else {
 				autoSlide = config.autoSlide;
-			}
 
-			// If there are media elements with data-autoplay,
-			// automatically set the autoSlide duration to the
-			// length of that media. Not applicable if the slide
-			// is divided up into fragments.
-			// playbackRate is accounted for in the duration.
-			if( currentSlide.querySelectorAll( '.fragment' ).length === 0 ) {
-				Util.queryAll( currentSlide, 'video, audio' ).forEach( el => {
-					if( el.hasAttribute( 'data-autoplay' ) ) {
-						if( autoSlide && (el.duration * 1000 / el.playbackRate ) > autoSlide ) {
-							autoSlide = ( el.duration * 1000 / el.playbackRate ) + 1000;
+				// If there are media elements with data-autoplay,
+				// automatically set the autoSlide duration to the
+				// length of that media. Not applicable if the slide
+				// is divided up into fragments.
+				// playbackRate is accounted for in the duration.
+				if( currentSlide.querySelectorAll( '.fragment' ).length === 0 ) {
+					Util.queryAll( currentSlide, 'video, audio' ).forEach( el => {
+						if( el.hasAttribute( 'data-autoplay' ) ) {
+							if( autoSlide && (el.duration * 1000 / el.playbackRate ) > autoSlide ) {
+								autoSlide = ( el.duration * 1000 / el.playbackRate ) + 1000;
+							}
 						}
-					}
-				} );
+					} );
+				}
 			}
 
 			// Cue the next auto-slide if:
@@ -2142,55 +2303,55 @@ export default function( revealElement, options ) {
 
 	}
 
-	function navigateLeft() {
+	function navigateLeft({skipFragments=false}={}) {
 
 		navigationHistory.hasNavigatedHorizontally = true;
 
 		// Reverse for RTL
 		if( config.rtl ) {
-			if( ( overview.isActive() || fragments.next() === false ) && availableRoutes().left ) {
+			if( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().left ) {
 				slide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );
 			}
 		}
 		// Normal navigation
-		else if( ( overview.isActive() || fragments.prev() === false ) && availableRoutes().left ) {
+		else if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().left ) {
 			slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );
 		}
 
 	}
 
-	function navigateRight() {
+	function navigateRight({skipFragments=false}={}) {
 
 		navigationHistory.hasNavigatedHorizontally = true;
 
 		// Reverse for RTL
 		if( config.rtl ) {
-			if( ( overview.isActive() || fragments.prev() === false ) && availableRoutes().right ) {
+			if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().right ) {
 				slide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );
 			}
 		}
 		// Normal navigation
-		else if( ( overview.isActive() || fragments.next() === false ) && availableRoutes().right ) {
+		else if( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().right ) {
 			slide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );
 		}
 
 	}
 
-	function navigateUp() {
+	function navigateUp({skipFragments=false}={}) {
 
 		// Prioritize hiding fragments
-		if( ( overview.isActive() || fragments.prev() === false ) && availableRoutes().up ) {
+		if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().up ) {
 			slide( indexh, indexv - 1 );
 		}
 
 	}
 
-	function navigateDown() {
+	function navigateDown({skipFragments=false}={}) {
 
 		navigationHistory.hasNavigatedVertically = true;
 
 		// Prioritize revealing fragments
-		if( ( overview.isActive() || fragments.next() === false ) && availableRoutes().down ) {
+		if( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().down ) {
 			slide( indexh, indexv + 1 );
 		}
 
@@ -2202,12 +2363,12 @@ export default function( revealElement, options ) {
 	 * 2) Previous vertical slide
 	 * 3) Previous horizontal slide
 	 */
-	function navigatePrev() {
+	function navigatePrev({skipFragments=false}={}) {
 
 		// Prioritize revealing fragments
-		if( fragments.prev() === false ) {
+		if( skipFragments || fragments.prev() === false ) {
 			if( availableRoutes().up ) {
-				navigateUp();
+				navigateUp({skipFragments});
 			}
 			else {
 				// Fetch the previous horizontal slide, if there is one
@@ -2220,11 +2381,16 @@ export default function( revealElement, options ) {
 					previousSlide = Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.past' ).pop();
 				}
 
-				if( previousSlide ) {
+				// When going backwards and arriving on a stack we start
+				// at the bottom of the stack
+				if( previousSlide && previousSlide.classList.contains( 'stack' ) ) {
 					let v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined;
 					let h = indexh - 1;
 					slide( h, v );
 				}
+				else {
+					navigateLeft({skipFragments});
+				}
 			}
 		}
 
@@ -2233,31 +2399,31 @@ export default function( revealElement, options ) {
 	/**
 	 * The reverse of #navigatePrev().
 	 */
-	function navigateNext() {
+	function navigateNext({skipFragments=false}={}) {
 
 		navigationHistory.hasNavigatedHorizontally = true;
 		navigationHistory.hasNavigatedVertically = true;
 
 		// Prioritize revealing fragments
-		if( fragments.next() === false ) {
+		if( skipFragments || fragments.next() === false ) {
 
 			let routes = availableRoutes();
 
 			// When looping is enabled `routes.down` is always available
 			// so we need a separate check for when we've reached the
 			// end of a stack and should move horizontally
-			if( routes.down && routes.right && config.loop && isLastVerticalSlide( currentSlide ) ) {
+			if( routes.down && routes.right && config.loop && isLastVerticalSlide() ) {
 				routes.down = false;
 			}
 
 			if( routes.down ) {
-				navigateDown();
+				navigateDown({skipFragments});
 			}
 			else if( config.rtl ) {
-				navigateLeft();
+				navigateLeft({skipFragments});
 			}
 			else {
-				navigateRight();
+				navigateRight({skipFragments});
 			}
 		}
 
@@ -2282,6 +2448,38 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	* Listener for post message events posted to this window.
+	*/
+	function onPostMessage( event ) {
+
+		let data = event.data;
+
+		// Make sure we're dealing with JSON
+		if( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {
+			data = JSON.parse( data );
+
+			// Check if the requested method can be found
+			if( data.method && typeof Reveal[data.method] === 'function' ) {
+
+				if( POST_MESSAGE_METHOD_BLACKLIST.test( data.method ) === false ) {
+
+					const result = Reveal[data.method].apply( Reveal, data.args );
+
+					// Dispatch a postMessage event with the returned value from
+					// our method invocation for getter functions
+					dispatchPostMessage( 'callback', { method: data.method, result: result } );
+
+				}
+				else {
+					console.warn( 'reveal.js: "'+ data.method +'" is is blacklisted from the postMessage API' );
+				}
+
+			}
+		}
+
+	}
+
 	/**
 	 * Event listener for transition end on the current slide.
 	 *
@@ -2299,6 +2497,33 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * A global listener for all click events inside of the
+	 * .slides container.
+	 *
+	 * @param {object} [event]
+	 */
+	function onSlidesClicked( event ) {
+
+		const anchor = Util.closest( event.target, 'a[href^="#"]' );
+
+		// If a hash link is clicked, we find the target slide
+		// and navigate to it. We previously relied on 'hashchange'
+		// for links like these but that prevented media with
+		// audio tracks from playing in mobile browsers since it
+		// wasn't considered a direct interaction with the document.
+		if( anchor ) {
+			const hash = anchor.getAttribute( 'href' );
+			const indices = location.getIndicesFromHash( hash );
+
+			if( indices ) {
+				Reveal.slide( indices.h, indices.v, indices.f );
+				event.preventDefault();
+			}
+		}
+
+	}
+
 	/**
 	 * Handler for the window level 'resize' event.
 	 *
@@ -2329,6 +2554,26 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Handler for the document level 'fullscreenchange' event.
+	 *
+	 * @param {object} [event]
+	 */
+	function onFullscreenChange( event ) {
+
+		let element = document.fullscreenElement || document.webkitFullscreenElement;
+		if( element === dom.wrapper ) {
+			event.stopImmediatePropagation();
+
+			// Timeout to avoid layout shift in Safari
+			setTimeout( () => {
+				Reveal.layout();
+				Reveal.focus.focus(); // focus.focus :'(
+			}, 1 );
+		}
+
+	}
+
 	/**
 	 * Handles clicks on links that are set to preview in the
 	 * iframe overlay.
@@ -2381,6 +2626,7 @@ export default function( revealElement, options ) {
 
 		initialize,
 		configure,
+		destroy,
 
 		sync,
 		syncSlide,
@@ -2435,6 +2681,9 @@ export default function( revealElement, options ) {
 		// Toggles the auto slide mode on/off
 		toggleAutoSlide,
 
+		// Toggles visibility of the jump-to-slide UI
+		toggleJumpToSlide,
+
 		// Slide navigation checks
 		isFirstSlide,
 		isLastSlide,
@@ -2456,6 +2705,14 @@ export default function( revealElement, options ) {
 		loadSlide: slideContent.load.bind( slideContent ),
 		unloadSlide: slideContent.unload.bind( slideContent ),
 
+		// Media playback
+		startEmbeddedContent: () => slideContent.startEmbeddedContent( currentSlide ),
+		stopEmbeddedContent: () => slideContent.stopEmbeddedContent( currentSlide, { unloadIframes: false } ),
+
+		// Preview management
+		showPreview,
+		hidePreview: closeOverlay,
+
 		// Adds or removes all internal event listeners
 		addEventListeners,
 		removeEventListeners,
@@ -2533,6 +2790,9 @@ export default function( revealElement, options ) {
 		// Helper method, retrieves query string as a key:value map
 		getQueryHash: Util.getQueryHash,
 
+		// Returns the path to the current slide as represented in the URL
+		getSlidePath: location.getHash.bind( location ),
+
 		// Returns reveal.js DOM elements
 		getRevealElement: () => revealElement,
 		getSlidesElement: () => dom.slides,

js/utils/color.js

@@ -29,9 +29,9 @@ export const colorToRgb = ( color ) => {
 	if( hex6 && hex6[1] ) {
 		hex6 = hex6[1];
 		return {
-			r: parseInt( hex6.substr( 0, 2 ), 16 ),
-			g: parseInt( hex6.substr( 2, 2 ), 16 ),
-			b: parseInt( hex6.substr( 4, 2 ), 16 )
+			r: parseInt( hex6.slice( 0, 2 ), 16 ),
+			g: parseInt( hex6.slice( 2, 4 ), 16 ),
+			b: parseInt( hex6.slice( 4, 6 ), 16 )
 		};
 	}
 

js/utils/constants.js

@@ -4,7 +4,7 @@ export const HORIZONTAL_SLIDES_SELECTOR = '.slides>section';
 export const VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section';
 
 // Methods that may not be invoked via the postMessage API
-export const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener/;
+export const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener|showPreview/;
 
 // Regex for retrieving the fragment style from a class attribute
 export const FRAGMENT_STYLE_REGEX = /fade-(down|up|right|left|out|in-then-out|in-then-semi-out)|semi-fade-out|current-visible|shrink|grow/;

js/utils/device.js

@@ -1,17 +1,8 @@
 const UA = navigator.userAgent;
-const testElement = document.createElement( 'div' );
 
 export const isMobile = /(iphone|ipod|ipad|android)/gi.test( UA ) ||
 						( navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1 ); // iPadOS
 
 export const isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );
 
-export const isAndroid = /android/gi.test( UA );
-
-// Flags if we should use zoom instead of transform to scale
-// up slides. Zoom produces crisper results but has a lot of
-// xbrowser quirks so we only use it in whitelisted browsers.
-export const supportsZoom = 'zoom' in testElement.style && !isMobile &&
-				( isChrome || /Version\/[\d\.]+.*Safari/.test( UA ) );
-
-export const supportsHistoryAPI = typeof window.history.replaceState === 'function' && !/PhantomJS/.test( UA );
+export const isAndroid = /android/gi.test( UA );

js/utils/util.js

@@ -85,6 +85,23 @@ export const transformElement = ( element, transform ) => {
 
 }
 
+/**
+ * Element.matches with IE support.
+ *
+ * @param {HTMLElement} target The element to match
+ * @param {String} selector The CSS selector to match
+ * the element against
+ *
+ * @return {Boolean}
+ */
+export const matches = ( target, selector ) => {
+
+	let matchesMethod = target.matches || target.matchesSelector || target.msMatchesSelector;
+
+	return !!( matchesMethod && matchesMethod.call( target, selector ) );
+
+}
+
 /**
  * Find the closest parent that matches the given
  * selector.
@@ -96,25 +113,21 @@ export const transformElement = ( element, transform ) => {
  * @return {HTMLElement} The matched parent or null
  * if no matching parent was found
  */
-export const closestParent = ( target, selector ) => {
+export const closest = ( target, selector ) => {
 
-	let parent = target.parentNode;
+	// Native Element.closest
+	if( typeof target.closest === 'function' ) {
+		return target.closest( selector );
+	}
 
-	while( parent ) {
-
-		// There's some overhead doing this each time, we don't
-		// want to rewrite the element prototype but should still
-		// be enough to feature detect once at startup...
-		let matchesMethod = parent.matches || parent.matchesSelector || parent.msMatchesSelector;
-
-		// If we find a match, we're all set
-		if( matchesMethod && matchesMethod.call( parent, selector ) ) {
-			return parent;
+	// Polyfill
+	while( target ) {
+		if( matches( target, selector ) ) {
+			return target;
 		}
 
 		// Keep searching
-		parent = parent.parentNode;
-
+		target = target.parentNode;
 	}
 
 	return null;
@@ -266,4 +279,35 @@ export const getRemainingHeight = ( element, height = 0 ) => {
 
 	return height;
 
+}
+
+const fileExtensionToMimeMap = {
+	'mp4': 'video/mp4',
+	'm4a': 'video/mp4',
+	'ogv': 'video/ogg',
+	'mpeg': 'video/mpeg',
+	'webm': 'video/webm'
+}
+
+/**
+ * Guess the MIME type for common file formats.
+ */
+export const getMimeTypeFromFile = ( filename='' ) => {
+	return fileExtensionToMimeMap[filename.split('.').pop()]
+}
+
+/**
+ * Encodes a string for RFC3986-compliant URL format.
+ * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURI#encoding_for_rfc3986
+ *
+ * @param {string} url
+ */
+export const encodeRFC3986URI = ( url='' ) => {
+	return encodeURI(url)
+	  .replace(/%5B/g, "[")
+	  .replace(/%5D/g, "]")
+	  .replace(
+		/[!'()*]/g,
+		(c) => `%${c.charCodeAt(0).toString(16).toUpperCase()}`
+	  );
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "reveal.js",
-  "version": "4.0.0",
+  "version": "4.6.0",
   "description": "The HTML Presentation Framework",
   "homepage": "https://revealjs.com",
   "subdomain": "revealjs",
@@ -30,43 +30,49 @@
     "presentation"
   ],
   "devDependencies": {
-    "@babel/core": "^7.9.6",
-    "@babel/preset-env": "^7.9.6",
-    "@rollup/plugin-commonjs": "^11.1.0",
-    "@rollup/plugin-node-resolve": "^7.1.3",
-    "babel-eslint": "^10.1.0",
+    "@babel/core": "^7.14.3",
+    "@babel/eslint-parser": "^7.14.3",
+    "@babel/preset-env": "^7.14.2",
+    "@rollup/plugin-babel": "^5.3.0",
+    "@rollup/plugin-commonjs": "^19.0.0",
+    "@rollup/plugin-node-resolve": "^13.0.0",
     "babel-plugin-transform-html-import-to-string": "0.0.1",
     "colors": "^1.4.0",
-    "core-js": "^3.6.5",
-    "glob": "^7.1.6",
+    "core-js": "^3.12.1",
+    "fitty": "^2.3.0",
+    "glob": "^7.1.7",
     "gulp": "^4.0.2",
-    "gulp-autoprefixer": "^7.0.1",
+    "gulp-autoprefixer": "^8.0.0",
     "gulp-clean-css": "^4.2.0",
     "gulp-connect": "^5.7.0",
     "gulp-eslint": "^6.0.0",
     "gulp-header": "^2.0.9",
-    "gulp-sass": "^4.0.2",
     "gulp-tap": "^2.0.0",
-    "gulp-zip": "^5.0.1",
-    "highlight.js": "^10.0.3",
-    "marked": "^1.1.0",
-    "node-qunit-puppeteer": "^2.0.1",
-    "qunit": "^2.10.0",
-    "rollup": "^2.10.4",
-    "rollup-plugin-babel": "^4.4.0",
-    "rollup-plugin-terser": "^5.3.0",
+    "gulp-zip": "^4.2.0",
+    "highlight.js": "^11.7.0",
+    "marked": "^4.0.12",
+    "node-qunit-puppeteer": "^2.1.2",
+    "qunit": "^2.19.3",
+    "rollup": "^2.48.0",
+    "rollup-plugin-terser": "^7.0.2",
+    "sass": "^1.39.2",
     "yargs": "^15.1.0"
   },
-  "browserslist": "> 0.5%, IE 11, not dead",
+  "overrides": {
+    "chokidar": "3.5.3",
+    "glob-parent": "6.0.2"
+  },
+  "browserslist": "> 2%, not dead",
   "eslintConfig": {
     "env": {
       "browser": true,
       "es6": true
     },
-    "parser": "babel-eslint",
+    "parser": "@babel/eslint-parser",
     "parserOptions": {
       "sourceType": "module",
-      "allowImportExportEverywhere": true
+      "allowImportExportEverywhere": true,
+      "requireConfigFile": false
     },
     "globals": {
       "module": false,

plugin/highlight/plugin.js

@@ -1,8 +1,8 @@
-import hljs from 'highlight.js'
+import hljs from 'highlight.js';
+
+/* highlightjs-line-numbers.js 2.8.0 | (C) 2018 Yauheni Pakala | MIT License | github.com/wcoder/highlightjs-line-numbers.js */
+!function(r,o){"use strict";var e,i="hljs-ln",l="hljs-ln-line",h="hljs-ln-code",s="hljs-ln-numbers",c="hljs-ln-n",m="data-line-number",a=/\r\n|\r|\n/g;function u(e){for(var n=e.toString(),t=e.anchorNode;"TD"!==t.nodeName;)t=t.parentNode;for(var r=e.focusNode;"TD"!==r.nodeName;)r=r.parentNode;var o=parseInt(t.dataset.lineNumber),a=parseInt(r.dataset.lineNumber);if(o==a)return n;var i,l=t.textContent,s=r.textContent;for(a<o&&(i=o,o=a,a=i,i=l,l=s,s=i);0!==n.indexOf(l);)l=l.slice(1);for(;-1===n.lastIndexOf(s);)s=s.slice(0,-1);for(var c=l,u=function(e){for(var n=e;"TABLE"!==n.nodeName;)n=n.parentNode;return n}(t),d=o+1;d<a;++d){var f=p('.{0}[{1}="{2}"]',[h,m,d]);c+="\n"+u.querySelector(f).textContent}return c+="\n"+s}function n(e){try{var n=o.querySelectorAll("code.hljs,code.nohighlight");for(var t in n)n.hasOwnProperty(t)&&(n[t].classList.contains("nohljsln")||d(n[t],e))}catch(e){r.console.error("LineNumbers error: ",e)}}function d(e,n){if("object"==typeof e)e.innerHTML=f(e,n)}function f(e,n){var t,r,o=(t=e,{singleLine:function(e){return!!e.singleLine&&e.singleLine}(r=(r=n)||{}),startFrom:function(e,n){var t=1;isFinite(n.startFrom)&&(t=n.startFrom);var r=function(e,n){return e.hasAttribute(n)?e.getAttribute(n):null}(e,"data-ln-start-from");return null!==r&&(t=function(e,n){if(!e)return n;var t=Number(e);return isFinite(t)?t:n}(r,1)),t}(t,r)});return function e(n){var t=n.childNodes;for(var r in t){var o;t.hasOwnProperty(r)&&(o=t[r],0<(o.textContent.trim().match(a)||[]).length&&(0<o.childNodes.length?e(o):v(o.parentNode)))}}(e),function(e,n){var t=g(e);""===t[t.length-1].trim()&&t.pop();if(1<t.length||n.singleLine){for(var r="",o=0,a=t.length;o<a;o++)r+=p('<tr><td class="{0} {1}" {3}="{5}"><div class="{2}" {3}="{5}"></div></td><td class="{0} {4}" {3}="{5}">{6}</td></tr>',[l,s,c,m,h,o+n.startFrom,0<t[o].length?t[o]:" "]);return p('<table class="{0}">{1}</table>',[i,r])}return e}(e.innerHTML,o)}function v(e){var n=e.className;if(/hljs-/.test(n)){for(var t=g(e.innerHTML),r=0,o="";r<t.length;r++){o+=p('<span class="{0}">{1}</span>\n',[n,0<t[r].length?t[r]:" "])}e.innerHTML=o.trim()}}function g(e){return 0===e.length?[]:e.split(a)}function p(e,t){return e.replace(/\{(\d+)\}/g,function(e,n){return void 0!==t[n]?t[n]:e})}hljs?(hljs.initLineNumbersOnLoad=function(e){"interactive"===o.readyState||"complete"===o.readyState?n(e):r.addEventListener("DOMContentLoaded",function(){n(e)})},hljs.lineNumbersBlock=d,hljs.lineNumbersValue=function(e,n){if("string"!=typeof e)return;var t=document.createElement("code");return t.innerHTML=e,f(t,n)},(e=o.createElement("style")).type="text/css",e.innerHTML=p(".{0}{border-collapse:collapse}.{0} td{padding:0}.{1}:before{content:attr({2})}",[i,c,m]),o.getElementsByTagName("head")[0].appendChild(e)):r.console.error("highlight.js not detected!"),document.addEventListener("copy",function(e){var n,t=window.getSelection();!function(e){for(var n=e;n;){if(n.className&&-1!==n.className.indexOf("hljs-ln-code"))return 1;n=n.parentNode}}(t.anchorNode)||(n=-1!==window.navigator.userAgent.indexOf("Edge")?u(t):t.toString(),e.clipboardData.setData("text/plain",n),e.preventDefault())})}(window,document);
 
-/* highlightjs-line-numbers.js 2.6.0 | (C) 2018 Yauheni Pakala | MIT License | github.com/wcoder/highlightjs-line-numbers.js */
-/* Edited by Hakim for reveal.js; removed async timeout */
-!function(n,e){"use strict";function t(){var n=e.createElement("style");n.type="text/css",n.innerHTML=g(".{0}{border-collapse:collapse}.{0} td{padding:0}.{1}:before{content:attr({2})}",[v,L,b]),e.getElementsByTagName("head")[0].appendChild(n)}function r(t){"interactive"===e.readyState||"complete"===e.readyState?i(t):n.addEventListener("DOMContentLoaded",function(){i(t)})}function i(t){try{var r=e.querySelectorAll("code.hljs,code.nohighlight");for(var i in r)r.hasOwnProperty(i)&&l(r[i],t)}catch(o){n.console.error("LineNumbers error: ",o)}}function l(n,e){"object"==typeof n&&f(function(){n.innerHTML=s(n,e)})}function o(n,e){if("string"==typeof n){var t=document.createElement("code");return t.innerHTML=n,s(t,e)}}function s(n,e){e=e||{singleLine:!1};var t=e.singleLine?0:1;return c(n),a(n.innerHTML,t)}function a(n,e){var t=u(n);if(""===t[t.length-1].trim()&&t.pop(),t.length>e){for(var r="",i=0,l=t.length;i<l;i++)r+=g('<tr><td class="{0}"><div class="{1} {2}" {3}="{5}"></div></td><td class="{4}"><div class="{1}">{6}</div></td></tr>',[j,m,L,b,p,i+1,t[i].length>0?t[i]:" "]);return g('<table class="{0}">{1}</table>',[v,r])}return n}function c(n){var e=n.childNodes;for(var t in e)if(e.hasOwnProperty(t)){var r=e[t];h(r.textContent)>0&&(r.childNodes.length>0?c(r):d(r.parentNode))}}function d(n){var e=n.className;if(/hljs-/.test(e)){for(var t=u(n.innerHTML),r=0,i="";r<t.length;r++){var l=t[r].length>0?t[r]:" ";i+=g('<span class="{0}">{1}</span>\n',[e,l])}n.innerHTML=i.trim()}}function u(n){return 0===n.length?[]:n.split(y)}function h(n){return(n.trim().match(y)||[]).length}function f(e){e()}function g(n,e){return n.replace(/\{(\d+)\}/g,function(n,t){return e[t]?e[t]:n})}var v="hljs-ln",m="hljs-ln-line",p="hljs-ln-code",j="hljs-ln-numbers",L="hljs-ln-n",b="data-line-number",y=/\r\n|\r|\n/g;hljs?(hljs.initLineNumbersOnLoad=r,hljs.lineNumbersBlock=l,hljs.lineNumbersValue=o,t()):n.console.error("highlight.js not detected!")}(window,document);
 
 /*!
  * reveal.js plugin that adds syntax highlight support.
@@ -16,8 +16,10 @@ const Plugin = {
 	HIGHLIGHT_LINE_DELIMITER: ',',
 	HIGHLIGHT_LINE_RANGE_DELIMITER: '-',
 
+	hljs,
+
 	/**
-	 * Highlights code blocks withing the given deck.
+	 * Highlights code blocks within the given deck.
 	 *
 	 * Note that this can be called multiple times if
 	 * there are multiple presentations on one page.
@@ -27,11 +29,23 @@ const Plugin = {
 	init: function( reveal ) {
 
 		// Read the plugin config options and provide fallbacks
-		var config = reveal.getConfig().highlight || {};
+		let config = reveal.getConfig().highlight || {};
+
 		config.highlightOnLoad = typeof config.highlightOnLoad === 'boolean' ? config.highlightOnLoad : true;
 		config.escapeHTML = typeof config.escapeHTML === 'boolean' ? config.escapeHTML : true;
 
-		[].slice.call( reveal.getRevealElement().querySelectorAll( 'pre code' ) ).forEach( function( block ) {
+		Array.from( reveal.getRevealElement().querySelectorAll( 'pre code' ) ).forEach( block => {
+
+			block.parentNode.classList.add('code-wrapper');
+
+			// Code can optionally be wrapped in script template to avoid
+			// HTML being parsed by the browser (i.e. when you need to
+			// include <, > or & in your code).
+			let substitute = block.querySelector( 'script[type="text/template"]' );
+			if( substitute ) {
+				// textContent handles the HTML entity escapes for us
+				block.textContent = substitute.innerHTML;
+			}
 
 			// Trim whitespace if the "data-trim" attribute is present
 			if( block.hasAttribute( 'data-trim' ) && typeof block.innerHTML.trim === 'function' ) {
@@ -45,15 +59,23 @@ const Plugin = {
 
 			// Re-highlight when focus is lost (for contenteditable code)
 			block.addEventListener( 'focusout', function( event ) {
-				hljs.highlightBlock( event.currentTarget );
+				hljs.highlightElement( event.currentTarget );
 			}, false );
 
-			if( config.highlightOnLoad ) {
-				Plugin.highlightBlock( block );
-			}
-
 		} );
 
+		// Triggers a callback function before we trigger highlighting
+		if( typeof config.beforeHighlight === 'function' ) {
+			config.beforeHighlight( hljs );
+		}
+
+		// Run initial highlighting for all code
+		if( config.highlightOnLoad ) {
+			Array.from( reveal.getRevealElement().querySelectorAll( 'pre code' ) ).forEach( block => {
+				Plugin.highlightBlock( block );
+			} );
+		}
+
 		// If we're printing to PDF, scroll the code highlights of
 		// all blocks in the deck into view at once
 		reveal.on( 'pdf-ready', function() {
@@ -74,7 +96,7 @@ const Plugin = {
 	 */
 	highlightBlock: function( block ) {
 
-		hljs.highlightBlock( block );
+		hljs.highlightElement( block );
 
 		// Don't generate line numbers for empty code blocks
 		if( block.innerHTML.trim().length === 0 ) return;
@@ -84,7 +106,7 @@ const Plugin = {
 
 			var scrollState = { currentBlock: block };
 
-			// If there is at least one highlight step, generate
+			// If there is more than one highlight step, generate
 			// fragments
 			var highlightSteps = Plugin.deserializeHighlightSteps( block.getAttribute( 'data-line-numbers' ) );
 			if( highlightSteps.length > 1 ) {
@@ -120,7 +142,7 @@ const Plugin = {
 
 				} );
 
-				block.removeAttribute( 'data-fragment-index' )
+				block.removeAttribute( 'data-fragment-index' );
 				block.setAttribute( 'data-line-numbers', Plugin.serializeHighlightSteps( [ highlightSteps[0] ] ) );
 
 			}

plugin/markdown/plugin.js

@@ -4,16 +4,27 @@
  * of external markdown documents.
  */
 
-import marked from 'marked'
+import { marked } from 'marked';
 
-const DEFAULT_SLIDE_SEPARATOR = '^\r?\n---\r?\n$',
-	  DEFAULT_NOTES_SEPARATOR = 'notes?:',
+const DEFAULT_SLIDE_SEPARATOR = '\r?\n---\r?\n',
+	  DEFAULT_VERTICAL_SEPARATOR = null,
+	  DEFAULT_NOTES_SEPARATOR = '^\s*notes?:',
 	  DEFAULT_ELEMENT_ATTRIBUTES_SEPARATOR = '\\\.element\\\s*?(.+?)$',
 	  DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR = '\\\.slide:\\\s*?(\\\S.+?)$';
 
 const SCRIPT_END_PLACEHOLDER = '__SCRIPT_END__';
 
-const CODE_LINE_NUMBER_REGEX = /\[([\s\d,|-]*)\]/;
+// match an optional line number offset and highlight line numbers
+// [<line numbers>] or [<offset>: <line numbers>]
+const CODE_LINE_NUMBER_REGEX = /\[\s*((\d*):)?\s*([\s\d,|-]*)\]/;
+
+const HTML_ESCAPE_MAP = {
+  '&': '&amp;',
+  '<': '&lt;',
+  '>': '&gt;',
+  '"': '&quot;',
+  "'": '&#39;'
+};
 
 const Plugin = () => {
 
@@ -27,22 +38,22 @@ const Plugin = () => {
 	function getMarkdownFromSlide( section ) {
 
 		// look for a <script> or <textarea data-template> wrapper
-		var template = section.querySelector( '[data-template]' ) || section.querySelector( 'script' );
+		const template = section.querySelector( '[data-template]' ) || section.querySelector( 'script' );
 
 		// strip leading whitespace so it isn't evaluated as code
-		var text = ( template || section ).textContent;
+		let text = ( template || section ).textContent;
 
 		// restore script end tags
 		text = text.replace( new RegExp( SCRIPT_END_PLACEHOLDER, 'g' ), '</script>' );
 
-		var leadingWs = text.match( /^\n?(\s*)/ )[1].length,
+		const leadingWs = text.match( /^\n?(\s*)/ )[1].length,
 			leadingTabs = text.match( /^\n?(\t*)/ )[1].length;
 
 		if( leadingTabs > 0 ) {
-			text = text.replace( new RegExp('\\n?\\t{' + leadingTabs + '}','g'), '\n' );
+			text = text.replace( new RegExp('\\n?\\t{' + leadingTabs + '}(.*)','g'), function(m, p1) { return '\n' + p1 ; } );
 		}
 		else if( leadingWs > 1 ) {
-			text = text.replace( new RegExp('\\n? {' + leadingWs + '}', 'g'), '\n' );
+			text = text.replace( new RegExp('\\n? {' + leadingWs + '}(.*)', 'g'), function(m, p1) { return '\n' + p1 ; } );
 		}
 
 		return text;
@@ -57,11 +68,11 @@ const Plugin = () => {
 	 */
 	function getForwardedAttributes( section ) {
 
-		var attributes = section.attributes;
-		var result = [];
+		const attributes = section.attributes;
+		const result = [];
 
-		for( var i = 0, len = attributes.length; i < len; i++ ) {
-			var name = attributes[i].name,
+		for( let i = 0, len = attributes.length; i < len; i++ ) {
+			const name = attributes[i].name,
 				value = attributes[i].value;
 
 			// disregard attributes that are used for markdown loading/parsing
@@ -84,10 +95,12 @@ const Plugin = () => {
 	 * values for what's not defined.
 	 */
 	function getSlidifyOptions( options ) {
+		const markdownConfig = deck.getConfig().markdown;
 
 		options = options || {};
-		options.separator = options.separator || DEFAULT_SLIDE_SEPARATOR;
-		options.notesSeparator = options.notesSeparator || DEFAULT_NOTES_SEPARATOR;
+		options.separator = options.separator || markdownConfig?.separator || DEFAULT_SLIDE_SEPARATOR;
+		options.verticalSeparator = options.verticalSeparator || markdownConfig?.verticalSeparator || DEFAULT_VERTICAL_SEPARATOR;
+		options.notesSeparator = options.notesSeparator || markdownConfig?.notesSeparator || DEFAULT_NOTES_SEPARATOR;
 		options.attributes = options.attributes || '';
 
 		return options;
@@ -101,7 +114,7 @@ const Plugin = () => {
 
 		options = getSlidifyOptions( options );
 
-		var notesMatch = content.split( new RegExp( options.notesSeparator, 'mgi' ) );
+		const notesMatch = content.split( new RegExp( options.notesSeparator, 'mgi' ) );
 
 		if( notesMatch.length === 2 ) {
 			content = notesMatch[0] + '<aside class="notes">' + marked(notesMatch[1].trim()) + '</aside>';
@@ -123,10 +136,10 @@ const Plugin = () => {
 
 		options = getSlidifyOptions( options );
 
-		var separatorRegex = new RegExp( options.separator + ( options.verticalSeparator ? '|' + options.verticalSeparator : '' ), 'mg' ),
+		const separatorRegex = new RegExp( options.separator + ( options.verticalSeparator ? '|' + options.verticalSeparator : '' ), 'mg' ),
 			horizontalSeparatorRegex = new RegExp( options.separator );
 
-		var matches,
+		let matches,
 			lastIndex = 0,
 			isHorizontal,
 			wasHorizontal = true,
@@ -135,7 +148,7 @@ const Plugin = () => {
 
 		// iterate until all blocks between separators are stacked up
 		while( matches = separatorRegex.exec( markdown ) ) {
-			var notes = null;
+			const notes = null;
 
 			// determine direction (horizontal by default)
 			isHorizontal = horizontalSeparatorRegex.test( matches[0] );
@@ -164,10 +177,10 @@ const Plugin = () => {
 		// add the remaining slide
 		( wasHorizontal ? sectionStack : sectionStack[sectionStack.length-1] ).push( markdown.substring( lastIndex ) );
 
-		var markdownSections = '';
+		let markdownSections = '';
 
 		// flatten the hierarchical stack, and insert <section data-markdown> tags
-		for( var i = 0, len = sectionStack.length; i < len; i++ ) {
+		for( let i = 0, len = sectionStack.length; i < len; i++ ) {
 			// vertical
 			if( sectionStack[i] instanceof Array ) {
 				markdownSections += '<section '+ options.attributes +'>';
@@ -196,9 +209,9 @@ const Plugin = () => {
 
 		return new Promise( function( resolve ) {
 
-			var externalPromises = [];
+			const externalPromises = [];
 
-			[].slice.call( scope.querySelectorAll( '[data-markdown]:not([data-markdown-parsed])') ).forEach( function( section, i ) {
+			[].slice.call( scope.querySelectorAll( 'section[data-markdown]:not([data-markdown-parsed])') ).forEach( function( section, i ) {
 
 				if( section.getAttribute( 'data-markdown' ).length ) {
 
@@ -226,7 +239,7 @@ const Plugin = () => {
 					) );
 
 				}
-				else if( section.getAttribute( 'data-separator' ) || section.getAttribute( 'data-separator-vertical' ) || section.getAttribute( 'data-separator-notes' ) ) {
+				else {
 
 					section.outerHTML = slidify( getMarkdownFromSlide( section ), {
 						separator: section.getAttribute( 'data-separator' ),
@@ -236,9 +249,6 @@ const Plugin = () => {
 					});
 
 				}
-				else {
-					section.innerHTML = createMarkdownSlide( getMarkdownFromSlide( section ) );
-				}
 
 			});
 
@@ -252,13 +262,13 @@ const Plugin = () => {
 
 		return new Promise( function( resolve, reject ) {
 
-			var xhr = new XMLHttpRequest(),
+			const xhr = new XMLHttpRequest(),
 				url = section.getAttribute( 'data-markdown' );
 
-			var datacharset = section.getAttribute( 'data-charset' );
+			const datacharset = section.getAttribute( 'data-charset' );
 
 			// see https://developer.mozilla.org/en-US/docs/Web/API/element.getAttribute#Notes
-			if( datacharset != null && datacharset != '' ) {
+			if( datacharset !== null && datacharset !== '' ) {
 				xhr.overrideMimeType( 'text/html; charset=' + datacharset );
 			}
 
@@ -303,17 +313,17 @@ const Plugin = () => {
 	 */
 	function addAttributeInElement( node, elementTarget, separator ) {
 
-		var mardownClassesInElementsRegex = new RegExp( separator, 'mg' );
-		var mardownClassRegex = new RegExp( "([^\"= ]+?)=\"([^\"]+?)\"|(data-[^\"= ]+?)(?=[\" ])", 'mg' );
-		var nodeValue = node.nodeValue;
-		var matches,
+		const markdownClassesInElementsRegex = new RegExp( separator, 'mg' );
+		const markdownClassRegex = new RegExp( "([^\"= ]+?)=\"([^\"]+?)\"|(data-[^\"= ]+?)(?=[\" ])", 'mg' );
+		let nodeValue = node.nodeValue;
+		let matches,
 			matchesClass;
-		if( matches = mardownClassesInElementsRegex.exec( nodeValue ) ) {
+		if( matches = markdownClassesInElementsRegex.exec( nodeValue ) ) {
 
-			var classes = matches[1];
-			nodeValue = nodeValue.substring( 0, matches.index ) + nodeValue.substring( mardownClassesInElementsRegex.lastIndex );
+			const classes = matches[1];
+			nodeValue = nodeValue.substring( 0, matches.index ) + nodeValue.substring( markdownClassesInElementsRegex.lastIndex );
 			node.nodeValue = nodeValue;
-			while( matchesClass = mardownClassRegex.exec( classes ) ) {
+			while( matchesClass = markdownClassRegex.exec( classes ) ) {
 				if( matchesClass[2] ) {
 					elementTarget.setAttribute( matchesClass[1], matchesClass[2] );
 				} else {
@@ -331,34 +341,34 @@ const Plugin = () => {
 	 */
 	function addAttributes( section, element, previousElement, separatorElementAttributes, separatorSectionAttributes ) {
 
-		if ( element != null && element.childNodes != undefined && element.childNodes.length > 0 ) {
-			var previousParentElement = element;
-			for( var i = 0; i < element.childNodes.length; i++ ) {
-				var childElement = element.childNodes[i];
+		if ( element !== null && element.childNodes !== undefined && element.childNodes.length > 0 ) {
+			let previousParentElement = element;
+			for( let i = 0; i < element.childNodes.length; i++ ) {
+				const childElement = element.childNodes[i];
 				if ( i > 0 ) {
-					var j = i - 1;
+					let j = i - 1;
 					while ( j >= 0 ) {
-						var aPreviousChildElement = element.childNodes[j];
-						if ( typeof aPreviousChildElement.setAttribute == 'function' && aPreviousChildElement.tagName != "BR" ) {
+						const aPreviousChildElement = element.childNodes[j];
+						if ( typeof aPreviousChildElement.setAttribute === 'function' && aPreviousChildElement.tagName !== "BR" ) {
 							previousParentElement = aPreviousChildElement;
 							break;
 						}
 						j = j - 1;
 					}
 				}
-				var parentSection = section;
-				if( childElement.nodeName ==  "section" ) {
+				let parentSection = section;
+				if( childElement.nodeName ===  "section" ) {
 					parentSection = childElement ;
 					previousParentElement = childElement ;
 				}
-				if ( typeof childElement.setAttribute == 'function' || childElement.nodeType == Node.COMMENT_NODE ) {
+				if ( typeof childElement.setAttribute === 'function' || childElement.nodeType === Node.COMMENT_NODE ) {
 					addAttributes( parentSection, childElement, previousParentElement, separatorElementAttributes, separatorSectionAttributes );
 				}
 			}
 		}
 
-		if ( element.nodeType == Node.COMMENT_NODE ) {
-			if ( addAttributeInElement( element, previousElement, separatorElementAttributes ) == false ) {
+		if ( element.nodeType === Node.COMMENT_NODE ) {
+			if ( addAttributeInElement( element, previousElement, separatorElementAttributes ) === false ) {
 				addAttributeInElement( element, section, separatorSectionAttributes );
 			}
 		}
@@ -370,14 +380,14 @@ const Plugin = () => {
 	 */
 	function convertSlides() {
 
-		var sections = deck.getRevealElement().querySelectorAll( '[data-markdown]:not([data-markdown-parsed])');
+		const sections = deck.getRevealElement().querySelectorAll( '[data-markdown]:not([data-markdown-parsed])');
 
 		[].slice.call( sections ).forEach( function( section ) {
 
 			section.setAttribute( 'data-markdown-parsed', true )
 
-			var notes = section.querySelector( 'aside.notes' );
-			var markdown = getMarkdownFromSlide( section );
+			const notes = section.querySelector( 'aside.notes' );
+			const markdown = getMarkdownFromSlide( section );
 
 			section.innerHTML = marked( markdown );
 			addAttributes( 	section, section, null, section.getAttribute( 'data-element-attributes' ) ||
@@ -399,6 +409,12 @@ const Plugin = () => {
 
 	}
 
+	function escapeForHTML( input ) {
+
+	  return input.replace( /([&<>'"])/g, char => HTML_ESCAPE_MAP[char] );
+
+	}
+
 	return {
 		id: 'markdown',
 
@@ -410,29 +426,53 @@ const Plugin = () => {
 
 			deck = reveal;
 
-			let renderer = new marked.Renderer();
+			let { renderer, animateLists, ...markedOptions } = deck.getConfig().markdown || {};
 
-			renderer.code = ( code, language ) => {
+			if( !renderer ) {
+				renderer = new marked.Renderer();
 
-				// Off by default
-				let lineNumbers = '';
+				renderer.code = ( code, language ) => {
 
-				// Users can opt in to show line numbers and highlight
-				// specific lines.
-				// ```javascript []        show line numbers
-				// ```javascript [1,4-8]   highlights lines 1 and 4-8
-				if( CODE_LINE_NUMBER_REGEX.test( language ) ) {
-					lineNumbers = language.match( CODE_LINE_NUMBER_REGEX )[1].trim();
-					lineNumbers = `data-line-numbers="${lineNumbers}"`;
-					language = language.replace( CODE_LINE_NUMBER_REGEX, '' ).trim();
-				}
+					// Off by default
+					let lineNumberOffset = '';
+					let lineNumbers = '';
 
-				return `<pre><code ${lineNumbers} class="${language}">${code}</code></pre>`;
-			};
+					// Users can opt in to show line numbers and highlight
+					// specific lines.
+					// ```javascript []        show line numbers
+					// ```javascript [1,4-8]   highlights lines 1 and 4-8
+					// optional line number offset:
+					// ```javascript [25: 1,4-8]   start line numbering at 25,
+					//                             highlights lines 1 (numbered as 25) and 4-8 (numbered as 28-32)
+					if( CODE_LINE_NUMBER_REGEX.test( language ) ) {
+						let lineNumberOffsetMatch =  language.match( CODE_LINE_NUMBER_REGEX )[2];
+						if (lineNumberOffsetMatch){
+							lineNumberOffset =  `data-ln-start-from="${lineNumberOffsetMatch.trim()}"`;
+						}
+
+						lineNumbers = language.match( CODE_LINE_NUMBER_REGEX )[3].trim();
+						lineNumbers = `data-line-numbers="${lineNumbers}"`;
+						language = language.replace( CODE_LINE_NUMBER_REGEX, '' ).trim();
+					}
+
+					// Escape before this gets injected into the DOM to
+					// avoid having the HTML parser alter our code before
+					// highlight.js is able to read it
+					code = escapeForHTML( code );
+
+					// return `<pre><code ${lineNumbers} class="${language}">${code}</code></pre>`;
+
+					return `<pre><code ${lineNumbers} ${lineNumberOffset} class="${language}">${code}</code></pre>`;
+				};
+			}
+
+			if( animateLists === true ) {
+				renderer.listitem = text => `<li class="fragment">${text}</li>`;
+			}
 
 			marked.setOptions( {
 				renderer,
-				...deck.getConfig().markdown
+				...markedOptions
 			} );
 
 			return processSlides( deck.getRevealElement() ).then( convertSlides );

plugin/math/katex.js

@@ -0,0 +1,96 @@
+/**
+ * A plugin which enables rendering of math equations inside
+ * of reveal.js slides. Essentially a thin wrapper for KaTeX.
+ *
+ * @author Hakim El Hattab
+ * @author Gerhard Burger
+ */
+export const KaTeX = () => {
+	let deck;
+
+	let defaultOptions = {
+		version: 'latest',
+		delimiters: [
+			{left: '$$', right: '$$', display: true}, // Note: $$ has to come before $
+			{left: '$', right: '$', display: false},
+			{left: '\\(', right: '\\)', display: false},
+			{left: '\\[', right: '\\]', display: true}
+		],
+		ignoredTags: ['script', 'noscript', 'style', 'textarea', 'pre']
+	}
+
+	const loadCss = src => {
+		let link = document.createElement('link');
+		link.rel = 'stylesheet';
+		link.href = src;
+		document.head.appendChild(link);
+	};
+
+	/**
+	 * Loads a JavaScript file and returns a Promise for when it is loaded
+	 * Credits: https://aaronsmith.online/easily-load-an-external-script-using-javascript/
+	 */
+	const loadScript = src => {
+		return new Promise((resolve, reject) => {
+			const script = document.createElement('script')
+			script.type = 'text/javascript'
+			script.onload = resolve
+			script.onerror = reject
+			script.src = src
+			document.head.append(script)
+		})
+	};
+
+	async function loadScripts(urls) {
+		for(const url of urls) {
+			await loadScript(url);
+		}
+	}
+
+	return {
+		id: 'katex',
+
+		init: function (reveal) {
+
+			deck = reveal;
+
+			let revealOptions = deck.getConfig().katex || {};
+
+			let options = {...defaultOptions, ...revealOptions};
+			const {local, version, extensions, ...katexOptions} = options;
+
+			let baseUrl = options.local || 'https://cdn.jsdelivr.net/npm/katex';
+			let versionString = options.local ? '' : '@' + options.version;
+
+			let cssUrl = baseUrl + versionString + '/dist/katex.min.css';
+			let katexUrl = baseUrl + versionString + '/dist/katex.min.js';
+			let mhchemUrl = baseUrl + versionString + '/dist/contrib/mhchem.min.js'
+			let karUrl = baseUrl + versionString + '/dist/contrib/auto-render.min.js';
+
+			let katexScripts = [katexUrl];
+			if(options.extensions && options.extensions.includes("mhchem")) {
+				katexScripts.push(mhchemUrl);
+			}
+			katexScripts.push(karUrl);
+
+			const renderMath = () => {
+				renderMathInElement(reveal.getSlidesElement(), katexOptions);
+				deck.layout();
+			}
+
+			loadCss(cssUrl);
+
+			// For some reason dynamically loading with defer attribute doesn't result in the expected behavior, the below code does
+			loadScripts(katexScripts).then(() => {
+				if( deck.isReady() ) {
+					renderMath();
+				}
+				else {
+					deck.on( 'ready', renderMath.bind( this ) );
+				}
+			});
+
+		}
+	}
+
+};

plugin/math/math.esm.js

@@ -1 +1,6 @@
-function e(e,t,n){return t in e?Object.defineProperty(e,t,{value:n,enumerable:!0,configurable:!0,writable:!0}):e[t]=n,e}function t(e,t){var n=Object.keys(e);if(Object.getOwnPropertySymbols){var r=Object.getOwnPropertySymbols(e);t&&(r=r.filter((function(t){return Object.getOwnPropertyDescriptor(e,t).enumerable}))),n.push.apply(n,r)}return n}function n(n){for(var r=1;r<arguments.length;r++){var a=null!=arguments[r]?arguments[r]:{};r%2?t(Object(a),!0).forEach((function(t){e(n,t,a[t])})):Object.getOwnPropertyDescriptors?Object.defineProperties(n,Object.getOwnPropertyDescriptors(a)):t(Object(a)).forEach((function(e){Object.defineProperty(n,e,Object.getOwnPropertyDescriptor(a,e))}))}return n}export default function(){var e,t={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(","\\)"]],skipTags:["script","noscript","style","textarea","pre"]},skipStartupTypeset:!0};return{id:"math",init:function(r){var a=(e=r).getConfig().math||{},o=n(n({},t),a),c=(o.mathjax||"https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js")+"?config="+(o.config||"TeX-AMS_HTML-full");o.tex2jax=n(n({},t.tex2jax),a.tex2jax),o.mathjax=o.config=null,function(e,t){var n=this,r=document.querySelector("head"),a=document.createElement("script");a.type="text/javascript",a.src=e;var o=function(){"function"==typeof t&&(t.call(),t=null)};a.onload=o,a.onreadystatechange=function(){"loaded"===n.readyState&&o()},r.appendChild(a)}(c,(function(){MathJax.Hub.Config(o),MathJax.Hub.Queue(["Typeset",MathJax.Hub,e.getRevealElement()]),MathJax.Hub.Queue(e.layout),e.on("slidechanged",(function(e){MathJax.Hub.Queue(["Typeset",MathJax.Hub,e.currentSlide])}))}))}}}
+const t=()=>{let t,e={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(","\\)"]],skipTags:["script","noscript","style","textarea","pre"]},skipStartupTypeset:!0};return{id:"mathjax2",init:function(a){t=a;let n=t.getConfig().mathjax2||t.getConfig().math||{},i={...e,...n},s=(i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js")+"?config="+(i.config||"TeX-AMS_HTML-full");i.tex2jax={...e.tex2jax,...n.tex2jax},i.mathjax=i.config=null,function(t,e){let a=document.querySelector("head"),n=document.createElement("script");n.type="text/javascript",n.src=t;let i=()=>{"function"==typeof e&&(e.call(),e=null)};n.onload=i,n.onreadystatechange=()=>{"loaded"===this.readyState&&i()},a.appendChild(n)}(s,(function(){MathJax.Hub.Config(i),MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.getRevealElement()]),MathJax.Hub.Queue(t.layout),t.on("slidechanged",(function(t){MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.currentSlide])}))}))}}},e=t;
+/*!
+ * This plugin is a wrapper for the MathJax2,
+ * MathJax3 and KaTeX typesetter plugins.
+ */
+var a=Plugin=Object.assign(e(),{KaTeX:()=>{let t,e={version:"latest",delimiters:[{left:"$$",right:"$$",display:!0},{left:"$",right:"$",display:!1},{left:"\\(",right:"\\)",display:!1},{left:"\\[",right:"\\]",display:!0}],ignoredTags:["script","noscript","style","textarea","pre"]};const a=t=>new Promise(((e,a)=>{const n=document.createElement("script");n.type="text/javascript",n.onload=e,n.onerror=a,n.src=t,document.head.append(n)}));return{id:"katex",init:function(n){t=n;let i=t.getConfig().katex||{},s={...e,...i};const{local:l,version:o,extensions:r,...c}=s;let d=s.local||"https://cdn.jsdelivr.net/npm/katex",p=s.local?"":"@"+s.version,u=d+p+"/dist/katex.min.css",h=d+p+"/dist/contrib/mhchem.min.js",x=d+p+"/dist/contrib/auto-render.min.js",m=[d+p+"/dist/katex.min.js"];s.extensions&&s.extensions.includes("mhchem")&&m.push(h),m.push(x);const f=()=>{renderMathInElement(n.getSlidesElement(),c),t.layout()};(t=>{let e=document.createElement("link");e.rel="stylesheet",e.href=t,document.head.appendChild(e)})(u),async function(t){for(const e of t)await a(e)}(m).then((()=>{t.isReady()?f():t.on("ready",f.bind(this))}))}}},MathJax2:t,MathJax3:()=>{let t,e={tex:{inlineMath:[["$","$"],["\\(","\\)"]]},options:{skipHtmlTags:["script","noscript","style","textarea","pre"]},startup:{ready:()=>{MathJax.startup.defaultReady(),MathJax.startup.promise.then((()=>{Reveal.layout()}))}}};return{id:"mathjax3",init:function(a){t=a;let n=t.getConfig().mathjax3||{},i={...e,...n};i.tex={...e.tex,...n.tex},i.options={...e.options,...n.options},i.startup={...e.startup,...n.startup};let s=i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js";i.mathjax=null,window.MathJax=i,function(t,e){let a=document.createElement("script");a.type="text/javascript",a.id="MathJax-script",a.src=t,a.async=!0,a.onload=()=>{"function"==typeof e&&(e.call(),e=null)},document.head.appendChild(a)}(s,(function(){Reveal.addEventListener("slidechanged",(function(t){MathJax.typeset()}))}))}}}});export default a;

plugin/math/math.js

@@ -1 +1 @@
-!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e=e||self).RevealMath=t()}(this,(function(){"use strict";function e(e,t,n){return t in e?Object.defineProperty(e,t,{value:n,enumerable:!0,configurable:!0,writable:!0}):e[t]=n,e}function t(e,t){var n=Object.keys(e);if(Object.getOwnPropertySymbols){var r=Object.getOwnPropertySymbols(e);t&&(r=r.filter((function(t){return Object.getOwnPropertyDescriptor(e,t).enumerable}))),n.push.apply(n,r)}return n}function n(n){for(var r=1;r<arguments.length;r++){var a=null!=arguments[r]?arguments[r]:{};r%2?t(Object(a),!0).forEach((function(t){e(n,t,a[t])})):Object.getOwnPropertyDescriptors?Object.defineProperties(n,Object.getOwnPropertyDescriptors(a)):t(Object(a)).forEach((function(e){Object.defineProperty(n,e,Object.getOwnPropertyDescriptor(a,e))}))}return n}return function(){var e,t={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(","\\)"]],skipTags:["script","noscript","style","textarea","pre"]},skipStartupTypeset:!0};return{id:"math",init:function(r){var a=(e=r).getConfig().math||{},o=n(n({},t),a),c=(o.mathjax||"https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js")+"?config="+(o.config||"TeX-AMS_HTML-full");o.tex2jax=n(n({},t.tex2jax),a.tex2jax),o.mathjax=o.config=null,function(e,t){var n=this,r=document.querySelector("head"),a=document.createElement("script");a.type="text/javascript",a.src=e;var o=function(){"function"==typeof t&&(t.call(),t=null)};a.onload=o,a.onreadystatechange=function(){"loaded"===n.readyState&&o()},r.appendChild(a)}(c,(function(){MathJax.Hub.Config(o),MathJax.Hub.Queue(["Typeset",MathJax.Hub,e.getRevealElement()]),MathJax.Hub.Queue(e.layout),e.on("slidechanged",(function(e){MathJax.Hub.Queue(["Typeset",MathJax.Hub,e.currentSlide])}))}))}}}}));
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).RevealMath=e()}(this,(function(){"use strict";const t=()=>{let t,e={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(","\\)"]],skipTags:["script","noscript","style","textarea","pre"]},skipStartupTypeset:!0};return{id:"mathjax2",init:function(n){t=n;let a=t.getConfig().mathjax2||t.getConfig().math||{},i={...e,...a},s=(i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js")+"?config="+(i.config||"TeX-AMS_HTML-full");i.tex2jax={...e.tex2jax,...a.tex2jax},i.mathjax=i.config=null,function(t,e){let n=document.querySelector("head"),a=document.createElement("script");a.type="text/javascript",a.src=t;let i=()=>{"function"==typeof e&&(e.call(),e=null)};a.onload=i,a.onreadystatechange=()=>{"loaded"===this.readyState&&i()},n.appendChild(a)}(s,(function(){MathJax.Hub.Config(i),MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.getRevealElement()]),MathJax.Hub.Queue(t.layout),t.on("slidechanged",(function(t){MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.currentSlide])}))}))}}},e=t;return Plugin=Object.assign(e(),{KaTeX:()=>{let t,e={version:"latest",delimiters:[{left:"$$",right:"$$",display:!0},{left:"$",right:"$",display:!1},{left:"\\(",right:"\\)",display:!1},{left:"\\[",right:"\\]",display:!0}],ignoredTags:["script","noscript","style","textarea","pre"]};const n=t=>new Promise(((e,n)=>{const a=document.createElement("script");a.type="text/javascript",a.onload=e,a.onerror=n,a.src=t,document.head.append(a)}));return{id:"katex",init:function(a){t=a;let i=t.getConfig().katex||{},s={...e,...i};const{local:o,version:l,extensions:r,...c}=s;let d=s.local||"https://cdn.jsdelivr.net/npm/katex",u=s.local?"":"@"+s.version,p=d+u+"/dist/katex.min.css",h=d+u+"/dist/contrib/mhchem.min.js",x=d+u+"/dist/contrib/auto-render.min.js",m=[d+u+"/dist/katex.min.js"];s.extensions&&s.extensions.includes("mhchem")&&m.push(h),m.push(x);const f=()=>{renderMathInElement(a.getSlidesElement(),c),t.layout()};(t=>{let e=document.createElement("link");e.rel="stylesheet",e.href=t,document.head.appendChild(e)})(p),async function(t){for(const e of t)await n(e)}(m).then((()=>{t.isReady()?f():t.on("ready",f.bind(this))}))}}},MathJax2:t,MathJax3:()=>{let t,e={tex:{inlineMath:[["$","$"],["\\(","\\)"]]},options:{skipHtmlTags:["script","noscript","style","textarea","pre"]},startup:{ready:()=>{MathJax.startup.defaultReady(),MathJax.startup.promise.then((()=>{Reveal.layout()}))}}};return{id:"mathjax3",init:function(n){t=n;let a=t.getConfig().mathjax3||{},i={...e,...a};i.tex={...e.tex,...a.tex},i.options={...e.options,...a.options},i.startup={...e.startup,...a.startup};let s=i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js";i.mathjax=null,window.MathJax=i,function(t,e){let n=document.createElement("script");n.type="text/javascript",n.id="MathJax-script",n.src=t,n.async=!0,n.onload=()=>{"function"==typeof e&&(e.call(),e=null)},document.head.appendChild(n)}(s,(function(){Reveal.addEventListener("slidechanged",(function(t){MathJax.typeset()}))}))}}}})}));

plugin/math/mathjax2.js

@@ -0,0 +1,89 @@
+/**
+ * A plugin which enables rendering of math equations inside
+ * of reveal.js slides. Essentially a thin wrapper for MathJax.
+ *
+ * @author Hakim El Hattab
+ */
+export const MathJax2 = () => {
+
+	// The reveal.js instance this plugin is attached to
+	let deck;
+
+	let defaultOptions = {
+		messageStyle: 'none',
+		tex2jax: {
+			inlineMath: [ [ '$', '$' ], [ '\\(', '\\)' ] ],
+			skipTags: [ 'script', 'noscript', 'style', 'textarea', 'pre' ]
+		},
+		skipStartupTypeset: true
+	};
+
+	function loadScript( url, callback ) {
+
+		let head = document.querySelector( 'head' );
+		let script = document.createElement( 'script' );
+		script.type = 'text/javascript';
+		script.src = url;
+
+		// Wrapper for callback to make sure it only fires once
+		let finish = () => {
+			if( typeof callback === 'function' ) {
+				callback.call();
+				callback = null;
+			}
+		}
+
+		script.onload = finish;
+
+		// IE
+		script.onreadystatechange = () => {
+			if ( this.readyState === 'loaded' ) {
+				finish();
+			}
+		}
+
+		// Normal browsers
+		head.appendChild( script );
+
+	}
+
+	return {
+		id: 'mathjax2',
+
+		init: function( reveal ) {
+
+			deck = reveal;
+
+			let revealOptions = deck.getConfig().mathjax2 || deck.getConfig().math || {};
+
+			let options = { ...defaultOptions, ...revealOptions };
+			let mathjax = options.mathjax || 'https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js';
+			let config = options.config || 'TeX-AMS_HTML-full';
+			let url = mathjax + '?config=' + config;
+
+			options.tex2jax = { ...defaultOptions.tex2jax, ...revealOptions.tex2jax };
+
+			options.mathjax = options.config = null;
+
+			loadScript( url, function() {
+
+				MathJax.Hub.Config( options );
+
+				// Typeset followed by an immediate reveal.js layout since
+				// the typesetting process could affect slide height
+				MathJax.Hub.Queue( [ 'Typeset', MathJax.Hub, deck.getRevealElement() ] );
+				MathJax.Hub.Queue( deck.layout );
+
+				// Reprocess equations in slides when they turn visible
+				deck.on( 'slidechanged', function( event ) {
+
+					MathJax.Hub.Queue( [ 'Typeset', MathJax.Hub, event.currentSlide ] );
+
+				} );
+
+			} );
+
+		}
+	}
+
+};

plugin/math/mathjax3.js

@@ -0,0 +1,77 @@
+/**
+ * A plugin which enables rendering of math equations inside
+ * of reveal.js slides. Essentially a thin wrapper for MathJax 3
+ *
+ * @author Hakim El Hattab
+ * @author Gerhard Burger
+ */
+export const MathJax3 = () => {
+
+    // The reveal.js instance this plugin is attached to
+    let deck;
+
+    let defaultOptions = {
+        tex: {
+            inlineMath: [ [ '$', '$' ], [ '\\(', '\\)' ]  ]
+        },
+        options: {
+            skipHtmlTags: [ 'script', 'noscript', 'style', 'textarea', 'pre' ]
+        },
+        startup: {
+            ready: () => {
+                MathJax.startup.defaultReady();
+                MathJax.startup.promise.then(() => {
+                    Reveal.layout();
+                });
+            }
+        }
+    };
+
+    function loadScript( url, callback ) {
+
+        let script = document.createElement( 'script' );
+        script.type = "text/javascript"
+        script.id = "MathJax-script"
+        script.src = url;
+        script.async = true
+
+        // Wrapper for callback to make sure it only fires once
+        script.onload = () => {
+            if (typeof callback === 'function') {
+                callback.call();
+                callback = null;
+            }
+        };
+
+        document.head.appendChild( script );
+
+    }
+
+    return {
+        id: 'mathjax3',
+        init: function(reveal) {
+
+            deck = reveal;
+
+            let revealOptions = deck.getConfig().mathjax3 || {};
+            let options = {...defaultOptions, ...revealOptions};
+            options.tex = {...defaultOptions.tex, ...revealOptions.tex}
+            options.options = {...defaultOptions.options, ...revealOptions.options}
+            options.startup = {...defaultOptions.startup, ...revealOptions.startup}
+
+            let url = options.mathjax || 'https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js';
+            options.mathjax = null;
+
+            window.MathJax = options;
+
+            loadScript( url, function() {
+                // Reprocess equations in slides when they turn visible
+                Reveal.addEventListener( 'slidechanged', function( event ) {
+                    MathJax.typeset();
+                } );
+            } );
+
+        }
+    }
+
+};

plugin/math/plugin.js

@@ -1,91 +1,15 @@
-/**
- * A plugin which enables rendering of math equations inside
- * of reveal.js slides. Essentially a thin wrapper for MathJax.
- *
- * @author Hakim El Hattab
+import {KaTeX} from "./katex";
+import {MathJax2} from "./mathjax2";
+import {MathJax3} from "./mathjax3";
+
+const defaultTypesetter = MathJax2;
+
+/*!
+ * This plugin is a wrapper for the MathJax2,
+ * MathJax3 and KaTeX typesetter plugins.
  */
-const Plugin = () => {
-
-	// The reveal.js instance this plugin is attached to
-	let deck;
-
-	let defaultOptions = {
-		messageStyle: 'none',
-		tex2jax: {
-			inlineMath: [ [ '$', '$' ], [ '\\(', '\\)' ] ],
-			skipTags: [ 'script', 'noscript', 'style', 'textarea', 'pre' ]
-		},
-		skipStartupTypeset: true
-	};
-
-	function loadScript( url, callback ) {
-
-		let head = document.querySelector( 'head' );
-		let script = document.createElement( 'script' );
-		script.type = 'text/javascript';
-		script.src = url;
-
-		// Wrapper for callback to make sure it only fires once
-		let finish = () => {
-			if( typeof callback === 'function' ) {
-				callback.call();
-				callback = null;
-			}
-		}
-
-		script.onload = finish;
-
-		// IE
-		script.onreadystatechange = () => {
-			if ( this.readyState === 'loaded' ) {
-				finish();
-			}
-		}
-
-		// Normal browsers
-		head.appendChild( script );
-
-	}
-
-	return {
-		id: 'math',
-
-		init: function( reveal ) {
-
-			deck = reveal;
-
-			let revealOptions = deck.getConfig().math || {};
-
-			let options = { ...defaultOptions, ...revealOptions };
-			let mathjax = options.mathjax || 'https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js';
-			let config = options.config || 'TeX-AMS_HTML-full';
-			let url = mathjax + '?config=' + config;
-
-			options.tex2jax = { ...defaultOptions.tex2jax, ...revealOptions.tex2jax };
-
-			options.mathjax = options.config = null;
-
-			loadScript( url, function() {
-
-				MathJax.Hub.Config( options );
-
-				// Typeset followed by an immediate reveal.js layout since
-				// the typesetting process could affect slide height
-				MathJax.Hub.Queue( [ 'Typeset', MathJax.Hub, deck.getRevealElement() ] );
-				MathJax.Hub.Queue( deck.layout );
-
-				// Reprocess equations in slides when they turn visible
-				deck.on( 'slidechanged', function( event ) {
-
-					MathJax.Hub.Queue( [ 'Typeset', MathJax.Hub, event.currentSlide ] );
-
-				} );
-
-			} );
-
-		}
-	}
-
-};
-
-export default Plugin;
+export default Plugin = Object.assign( defaultTypesetter(), {
+	KaTeX,
+	MathJax2,
+	MathJax3
+} );