5.0.2

chore: bump deps

.github/workflows/js.yml

@@ -1,22 +1,29 @@
 name: tests
 
-on: [push]
+on:
+  - push
+
+permissions:
+  contents: read
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        node-version: [10.x, 14.x, 16.x]
+        node-version:
+          - 18
+          - 20
 
     steps:
-    - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
+
       - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
+
       - run: npm install
       - run: npm run build --if-present
       - run: npm test

.npmignore

@@ -1,7 +1,5 @@
 /test
 /examples
 .github
-.gulpfile
 .sass-cache
 gulpfile.js
-CONTRIBUTING.md

LICENSE

@@ -1,4 +1,4 @@
-Copyright (C) 2011-2022 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

@@ -46,5 +46,5 @@ Hakim's open source work is supported by <a href="https://github.com/sponsors/ha
 
 --- 
 <div align="center">
-  MIT licensed | Copyright © 2011-2022 Hakim El Hattab, https://hakim.se
+  MIT licensed | Copyright © 2011-2023 Hakim El Hattab, https://hakim.se
 </div>

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;
+		}
 	}
 
-		.nestedarrow,
+	html:not(.print-pdf) .reveal {
+		background: #fff;
+		font-size: 20pt;
+
 		.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;
@@ -129,24 +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 .r-fit-text {
+		.r-fit-text {
 			white-space: normal !important;
 		}
 
-		.reveal section img {
+		section img {
 			display: block;
 			margin: 15px 0px;
 			background: rgba(255,255,255,1);
@@ -154,11 +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;
@@ -166,11 +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

@@ -5,7 +5,7 @@
  * https://revealjs.com/pdf-export/
  */
 
-html.print-pdf {
+html.reveal-print {
 	* {
 		-webkit-print-color-adjust: exact;
 	}
@@ -36,7 +36,6 @@ html.print-pdf {
 
 	.reveal pre code {
 		overflow: hidden !important;
-		font-family: Courier, 'Courier New', monospace !important;
 	}
 
 	.reveal {
@@ -71,6 +70,10 @@ html.print-pdf {
 		page-break-after: always;
 	}
 
+	.reveal .slides .pdf-page:last-of-type {
+		page-break-after: avoid;
+	}
+
 	.reveal .slides section {
 		visibility: visible !important;
 		display: block !important;
@@ -146,6 +149,7 @@ html.print-pdf {
 		display: block;
 		position: absolute;
 		font-size: 14px;
+		visibility: visible;
 	}
 
 	/* This accessibility tool is not useful in PDF and breaks it visually */

css/reveal.scss

@@ -19,6 +19,7 @@ html.reveal-full-page {
 	height: 100%;
 	height: 100vh;
 	height: calc( var(--vh, 1vh) * 100 );
+	height: 100svh;
 	overflow: hidden;
 }
 
@@ -31,6 +32,8 @@ html.reveal-full-page {
 
 	background-color: #fff;
 	color: #000;
+
+	--r-controls-spacing: 12px;
 }
 
 // Force the presentation to cover the full viewport when we
@@ -48,11 +51,14 @@ html.reveal-full-page {
  * VIEW FRAGMENTS
  *********************************************/
 
-.reveal .slides section .fragment {
+.reveal .fragment {
+	transition: all .2s ease;
+
+	&:not(.custom) {
 		opacity: 0;
 		visibility: hidden;
-	transition: all .2s ease;
 		will-change: opacity;
+	}
 
 	&.visible {
 		opacity: 1;
@@ -64,7 +70,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.grow {
+.reveal .fragment.grow {
 	opacity: 1;
 	visibility: inherit;
 
@@ -73,7 +79,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.shrink {
+.reveal .fragment.shrink {
 	opacity: 1;
 	visibility: inherit;
 
@@ -82,7 +88,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.zoom-in {
+.reveal .fragment.zoom-in {
 	transform: scale( 0.1 );
 
 	&.visible {
@@ -90,7 +96,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-out {
+.reveal .fragment.fade-out {
 	opacity: 1;
 	visibility: inherit;
 
@@ -100,7 +106,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.semi-fade-out {
+.reveal .fragment.semi-fade-out {
 	opacity: 1;
 	visibility: inherit;
 
@@ -110,7 +116,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.strike {
+.reveal .fragment.strike {
 	opacity: 1;
 	visibility: inherit;
 
@@ -119,7 +125,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-up {
+.reveal .fragment.fade-up {
 	transform: translate(0, 40px);
 
 	&.visible {
@@ -127,7 +133,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-down {
+.reveal .fragment.fade-down {
 	transform: translate(0, -40px);
 
 	&.visible {
@@ -135,7 +141,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-right {
+.reveal .fragment.fade-right {
 	transform: translate(-40px, 0);
 
 	&.visible {
@@ -143,7 +149,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-left {
+.reveal .fragment.fade-left {
 	transform: translate(40px, 0);
 
 	&.visible {
@@ -151,8 +157,8 @@ 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;
 
@@ -162,7 +168,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-in-then-semi-out {
+.reveal .fragment.fade-in-then-semi-out {
 	opacity: 0;
 	visibility: hidden;
 
@@ -177,32 +183,32 @@ 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;
 }
 
@@ -268,13 +274,11 @@ $controlsArrowAngleActive: 36deg;
 }
 
 .reveal .controls {
-	$spacing: 12px;
-
 	display: none;
 	position: absolute;
 	top: auto;
-	bottom: $spacing;
-	right: $spacing;
+	bottom: var(--r-controls-spacing);
+	right: var(--r-controls-spacing);
 	left: auto;
 	z-index: 11;
 	color: #000;
@@ -506,7 +510,9 @@ $controlsArrowAngleActive: 36deg;
 // Edge aligned controls layout
 @media screen and (min-width: 500px) {
 
-	$spacing: 0.8em;
+	.reveal-viewport {
+		--r-controls-spacing: 0.8em;
+	}
 
 	.reveal .controls[data-controls-layout="edges"] {
 		& {
@@ -526,24 +532,24 @@ $controlsArrowAngleActive: 36deg;
 
 		.navigate-left {
 			top: 50%;
-			left: $spacing;
+			left: var(--r-controls-spacing);
 			margin-top: -$controlArrowSize*0.5;
 		}
 
 		.navigate-right {
 			top: 50%;
-			right: $spacing;
+			right: var(--r-controls-spacing);
 			margin-top: -$controlArrowSize*0.5;
 		}
 
 		.navigate-up {
-			top: $spacing;
+			top: var(--r-controls-spacing);
 			left: 50%;
 			margin-left: -$controlArrowSize*0.5;
 		}
 
 		.navigate-down {
-			bottom: $spacing - $controlArrowSpacing + 0.3em;
+			bottom: calc(var(--r-controls-spacing) - #{$controlArrowSpacing} + 0.3em);
 			left: 50%;
 			margin-left: -$controlArrowSize*0.5;
 		}
@@ -1633,6 +1639,10 @@ $overlayHeaderPadding: 5px;
 	opacity: 0.4;
 }
 
+.reveal .hljs.has-highlights.fragment {
+	transition: all .2s ease;
+}
+
 .reveal .hljs:not(:first-child).fragment {
 	position: absolute;
 	top: 0;
@@ -1796,6 +1806,43 @@ $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
  *********************************************/
@@ -1820,6 +1867,234 @@ $notesWidthPercent: 25%;
 }
 
 
+/*********************************************
+ * SCROLL VIEW
+ *********************************************/
+.reveal-viewport.loading-scroll-mode {
+	visibility: hidden;
+}
+
+.reveal-viewport.reveal-scroll {
+	& {
+		margin: 0 auto;
+		overflow: auto;
+		overflow-x: hidden;
+		overflow-y: auto;
+		z-index: 1;
+
+		--r-scrollbar-width: 7px;
+		--r-scrollbar-trigger-size: 5px;
+		--r-controls-spacing: 8px;
+	}
+
+	@media screen and (max-width: 500px) {
+		--r-scrollbar-width: 3px;
+		--r-scrollbar-trigger-size: 3px;
+	}
+
+	.controls,
+	.progress,
+	.playback,
+	.backgrounds,
+	.slide-number,
+	.speaker-notes {
+		display: none !important;
+	}
+
+	.reveal {
+		overflow: visible;
+		touch-action: manipulation;
+	}
+
+	.slides {
+		position: static;
+		pointer-events: initial;
+
+		left: auto;
+		top: auto;
+		width: 100% !important;
+		margin: 0;
+		padding: 0;
+
+		overflow: visible;
+		display: block;
+
+		perspective: none;
+		perspective-origin: 50% 50%;
+	}
+
+	.scroll-page {
+		position: relative;
+		width: 100%;
+		height: calc(var(--page-height) + var(--page-scroll-padding));
+		z-index: 1;
+		overflow: visible;
+	}
+
+	.scroll-page-sticky {
+		position: sticky;
+		height: var(--page-height);
+		top: 0px;
+	}
+
+	.scroll-page-content {
+		position: absolute;
+		top: 0;
+		left: 0;
+		width: 100%;
+		height: 100%;
+		overflow: hidden;
+	}
+
+	.scroll-page section {
+		visibility: visible !important;
+		display: block !important;
+		position: absolute !important;
+		width: var(--slide-width) !important;
+		height: var(--slide-height) !important;
+		top: 50% !important;
+		left: 50% !important;
+		opacity: 1 !important;
+		transform: scale(var(--slide-scale)) translate(-50%, -50%) !important;
+		transform-style: flat !important;
+		transform-origin: 0 0 !important;
+	}
+
+	.slide-background {
+		display: block !important;
+		position: absolute;
+		top: 0;
+		left: 0;
+		width: 100%;
+		height: 100%;
+		z-index: auto !important;
+		visibility: visible;
+		opacity: 1;
+		touch-action: manipulation;
+	}
+}
+
+// Chromium
+.reveal-viewport.reveal-scroll[data-scrollbar="true"]::-webkit-scrollbar,
+.reveal-viewport.reveal-scroll[data-scrollbar="auto"]::-webkit-scrollbar {
+  display: none;
+}
+
+// Firefox
+.reveal-viewport.reveal-scroll[data-scrollbar="true"],
+.reveal-viewport.reveal-scroll[data-scrollbar="auto"] {
+  scrollbar-width: none;
+}
+
+.reveal.has-dark-background,
+.reveal-viewport.has-dark-background {
+	--r-overlay-element-bg-color: 240, 240, 240;
+	--r-overlay-element-fg-color: 0, 0, 0;
+}
+.reveal.has-light-background,
+.reveal-viewport.has-light-background {
+	--r-overlay-element-bg-color: 0, 0, 0;
+	--r-overlay-element-fg-color: 240, 240, 240;
+}
+
+.reveal-viewport.reveal-scroll .scrollbar {
+	position: sticky;
+	top: 50%;
+	z-index: 20;
+	opacity: 0;
+	transition: all 0.3s ease;
+
+	&.visible,
+	&:hover {
+		opacity: 1;
+	}
+
+	.scrollbar-inner {
+		position: absolute;
+		width: var(--r-scrollbar-width);
+		height: calc(var(--viewport-height) - var(--r-controls-spacing) * 2);
+		right: var(--r-controls-spacing);
+		top: 0;
+		transform: translateY(-50%);
+		border-radius: var(--r-scrollbar-width);
+		z-index: 10;
+	}
+
+	.scrollbar-playhead {
+		position: absolute;
+		width: var(--r-scrollbar-width);
+		height: var(--r-scrollbar-width);
+		top: 0;
+		left: 0;
+		border-radius: var(--r-scrollbar-width);
+		background-color: rgba(var(--r-overlay-element-bg-color), 1);
+		z-index: 11;
+		transition: background-color 0.2s ease;
+	}
+
+	.scrollbar-slide {
+		position: absolute;
+		width: 100%;
+		background-color: rgba(var(--r-overlay-element-bg-color), 0.2);
+		box-shadow: 0 0 0px 1px rgba(var(--r-overlay-element-fg-color), 0.1);
+		border-radius: var(--r-scrollbar-width);
+		transition: background-color 0.2s ease;
+	}
+
+	// Hit area
+	.scrollbar-slide:after {
+		content: '';
+		position: absolute;
+		width: 200%;
+		height: 100%;
+		top: 0;
+		left: -50%;
+		background: rgba( 0, 0, 0, 0 );
+		z-index: -1;
+	}
+
+	.scrollbar-slide:hover,
+	.scrollbar-slide.active {
+		background-color: rgba(var(--r-overlay-element-bg-color), 0.4);
+	}
+
+	.scrollbar-trigger {
+		position: absolute;
+		width: 100%;
+		transition: background-color 0.2s ease;
+	}
+
+	.scrollbar-slide.active.has-triggers {
+		background-color: rgba(var(--r-overlay-element-bg-color), 0.4);
+		z-index: 10;
+	}
+
+	.scrollbar-slide.active .scrollbar-trigger:after {
+		content: '';
+		position: absolute;
+		width: var(--r-scrollbar-trigger-size);
+		height: var(--r-scrollbar-trigger-size);
+		border-radius: 20px;
+		top: 50%;
+		left: 50%;
+		transform: translate(-50%, -50%);
+		background-color: rgba(var(--r-overlay-element-bg-color), 1);
+		transition: transform 0.2s ease, opacity 0.2s ease;
+		opacity: 0.4;
+	}
+
+	.scrollbar-slide.active .scrollbar-trigger.active:after,
+	.scrollbar-slide.active .scrollbar-trigger.active ~ .scrollbar-trigger:after {
+		opacity: 1;
+	}
+
+	.scrollbar-slide.active .scrollbar-trigger ~ .scrollbar-trigger.active:after {
+		transform: translate(calc( var(--r-scrollbar-width) * -2), 0);
+		background-color: rgba(var(--r-overlay-element-bg-color), 1);
+	}
+}
+
+
 /*********************************************
  * PRINT STYLES
  *********************************************/

css/theme/source/beige.scss

@@ -27,6 +27,9 @@ $linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: rgba(79, 64, 28, 0.99);
 $heading1TextShadow: 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,.1), 0 0 5px rgba(0,0,0,.1), 0 1px 3px rgba(0,0,0,.3), 0 3px 5px rgba(0,0,0,.2), 0 5px 10px rgba(0,0,0,.25), 0 20px 20px rgba(0,0,0,.15);
 
+$overlayElementBgColor: 0, 0, 0;
+$overlayElementFgColor: 240, 240, 240;
+
 // Background generator
 @mixin bodyBackground() {
 	@include radial-gradient( rgba(247,242,211,1), rgba(255,255,255,1) );

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

@@ -30,7 +30,7 @@ $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;

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/moon.scss

@@ -18,10 +18,6 @@
 /**
  * Solarized colors by Ethan Schoonover
  */
-html * {
-	color-profile: sRGB;
-	rendering-intent: auto;
-}
 
 // Solarized colors
 $base03:    #002b36;

css/theme/source/serif.scss

@@ -25,6 +25,9 @@ $linkColor: #51483D;
 $linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: #26351C;
 
+$overlayElementBgColor: 0, 0, 0;
+$overlayElementFgColor: 240, 240, 240;
+
 .reveal a {
   line-height: 1.3em;
 }

css/theme/source/simple.scss

@@ -31,6 +31,9 @@ $linkColor: #00008B;
 $linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: rgba(0, 0, 0, 0.99);
 
+$overlayElementBgColor: 0, 0, 0;
+$overlayElementFgColor: 240, 240, 240;
+
 // Change text colors against dark slide backgrounds
 @include dark-bg-text-color(#fff);
 

css/theme/source/sky.scss

@@ -29,6 +29,9 @@ $linkColor: #3b759e;
 $linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: #134674;
 
+$overlayElementBgColor: 0, 0, 0;
+$overlayElementFgColor: 240, 240, 240;
+
 // Fix links so they are not cut off
 .reveal a {
 	line-height: 1.3em;

css/theme/source/solarized.scss

@@ -51,6 +51,9 @@ $linkColor: $blue;
 $linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: $magenta;
 
+$overlayElementBgColor: 0, 0, 0;
+$overlayElementFgColor: 240, 240, 240;
+
 // Background generator
 // @mixin bodyBackground() {
 // 	@include radial-gradient( rgba($base3,1), rgba(lighten($base3, 20%),1) );

css/theme/source/white-contrast.scss

@@ -0,0 +1,52 @@
+/**
+ * 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;
+$heading4Size: 1.0em;
+
+$overlayElementBgColor: 0, 0, 0;
+$overlayElementFgColor: 240, 240, 240;
+
+// Change text colors against dark slide backgrounds
+@include dark-bg-text-color(#fff);
+
+
+// Theme template ------------------------------
+@import "../template/theme";
+// ---------------------------------------------

css/theme/source/white.scss

@@ -37,6 +37,9 @@ $heading2Size: 1.6em;
 $heading3Size: 1.3em;
 $heading4Size: 1.0em;
 
+$overlayElementBgColor: 0, 0, 0;
+$overlayElementFgColor: 240, 240, 240;
+
 // Change text colors against dark slide backgrounds
 @include dark-bg-text-color(#fff);
 

css/theme/template/exposer.scss

@@ -25,4 +25,6 @@
   --r-link-color-hover: #{$linkColorHover};
   --r-selection-background-color: #{$selectionBackgroundColor};
   --r-selection-color: #{$selectionColor};
+  --r-overlay-element-bg-color: #{$overlayElementBgColor};
+  --r-overlay-element-fg-color: #{$overlayElementFgColor};
 }

css/theme/template/settings.scss

@@ -38,6 +38,11 @@ $linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: #FF5E99;
 $selectionColor: #fff;
 
+// Colors used for UI elements that are overlaid on top of
+// the presentation
+$overlayElementBgColor: 240, 240, 240;
+$overlayElementFgColor: 0, 0, 0;
+
 // Generates the presentation background, can be overridden
 // to return a background image or gradient
 @mixin bodyBackground() {

demo.html

@@ -86,7 +86,7 @@
 
 				<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() {
@@ -101,8 +101,8 @@
 				</section>
 
 				<section data-auto-animate>
-					<h2 data-id="code-title">With animations</h2>
-					<pre data-id="code-animation"><code class="hljs" data-trim data-line-numbers="|4,8-11|17|22-24"><script type="text/template">
+					<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() {
@@ -181,14 +181,14 @@
 
 				<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 [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 [docs](https://revealjs.com/markdown/).
@@ -249,17 +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','dist/theme/black.css'); return false;">Black (default)</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/theme/white.css'); return false;">White</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/theme/league.css'); return false;">League</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/theme/sky.css'); return false;">Sky</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/theme/beige.css'); return false;">Beige</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/theme/simple.css'); return false;">Simple</a> <br>
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/theme/serif.css'); return false;">Serif</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/theme/blood.css'); return false;">Blood</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/theme/night.css'); return false;">Night</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/theme/moon.css'); return false;">Moon</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/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>
 

dist/theme/beige.css

@@ -37,16 +37,18 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
   --r-link-color-hover: #c0a86e;
   --r-selection-background-color: rgba(79, 64, 28, 0.99);
   --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 0, 0, 0;
+  --r-overlay-element-fg-color: 240, 240, 240;
 }
 
 .reveal-viewport {
-  background: #f7f2d3;
-  background: -moz-radial-gradient(center, circle cover, white 0%, #f7f2d3 100%);
-  background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, white), color-stop(100%, #f7f2d3));
-  background: -webkit-radial-gradient(center, circle cover, white 0%, #f7f2d3 100%);
-  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: rgb(247, 242, 211);
+  background: -moz-radial-gradient(center, circle cover, rgb(255, 255, 255) 0%, rgb(247, 242, 211) 100%);
+  background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, rgb(255, 255, 255)), color-stop(100%, rgb(247, 242, 211)));
+  background: -webkit-radial-gradient(center, circle cover, rgb(255, 255, 255) 0%, rgb(247, 242, 211) 100%);
+  background: -o-radial-gradient(center, circle cover, rgb(255, 255, 255) 0%, rgb(247, 242, 211) 100%);
+  background: -ms-radial-gradient(center, circle cover, rgb(255, 255, 255) 0%, rgb(247, 242, 211) 100%);
+  background: radial-gradient(center, circle cover, rgb(255, 255, 255) 0%, rgb(247, 242, 211) 100%);
   background-color: var(--r-background-color);
 }
 

dist/theme/black-contrast.css

@@ -0,0 +1,362 @@
+/**
+ * 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;
+  --r-overlay-element-bg-color: 240, 240, 240;
+  --r-overlay-element-fg-color: 0, 0, 0;
+}
+
+.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

@@ -34,8 +34,10 @@ section.has-light-background, section.has-light-background h1, section.has-light
   --r-link-color: #42affa;
   --r-link-color-dark: #068de9;
   --r-link-color-hover: #8dcffc;
-  --r-selection-background-color: #bee4fd;
+  --r-selection-background-color: rgba(66, 175, 250, 0.75);
   --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 240, 240, 240;
+  --r-overlay-element-fg-color: 0, 0, 0;
 }
 
 .reveal-viewport {

dist/theme/blood.css

@@ -42,6 +42,8 @@ section.has-light-background, section.has-light-background h1, section.has-light
   --r-link-color-hover: #dd5566;
   --r-selection-background-color: #a23;
   --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 240, 240, 240;
+  --r-overlay-element-fg-color: 0, 0, 0;
 }
 
 .reveal-viewport {

dist/theme/dracula.css

@@ -0,0 +1,385 @@
+/**
+ * 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;
+  --r-overlay-element-bg-color: 240, 240, 240;
+  --r-overlay-element-fg-color: 0, 0, 0;
+}
+
+.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/league.css

@@ -39,16 +39,18 @@ section.has-light-background, section.has-light-background h1, section.has-light
   --r-link-color-hover: #71e9f4;
   --r-selection-background-color: #FF5E99;
   --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 240, 240, 240;
+  --r-overlay-element-fg-color: 0, 0, 0;
 }
 
 .reveal-viewport {
-  background: #1c1e20;
-  background: -moz-radial-gradient(center, circle cover, #555a5f 0%, #1c1e20 100%);
-  background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, #555a5f), color-stop(100%, #1c1e20));
-  background: -webkit-radial-gradient(center, circle cover, #555a5f 0%, #1c1e20 100%);
-  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: rgb(28, 30, 32);
+  background: -moz-radial-gradient(center, circle cover, rgb(85, 90, 95) 0%, rgb(28, 30, 32) 100%);
+  background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, rgb(85, 90, 95)), color-stop(100%, rgb(28, 30, 32)));
+  background: -webkit-radial-gradient(center, circle cover, rgb(85, 90, 95) 0%, rgb(28, 30, 32) 100%);
+  background: -o-radial-gradient(center, circle cover, rgb(85, 90, 95) 0%, rgb(28, 30, 32) 100%);
+  background: -ms-radial-gradient(center, circle cover, rgb(85, 90, 95) 0%, rgb(28, 30, 32) 100%);
+  background: radial-gradient(center, circle cover, rgb(85, 90, 95) 0%, rgb(28, 30, 32) 100%);
   background-color: var(--r-background-color);
 }
 

dist/theme/moon.css

@@ -7,11 +7,6 @@
 /**
  * Solarized colors by Ethan Schoonover
  */
-html * {
-  color-profile: sRGB;
-  rendering-intent: auto;
-}
-
 section.has-light-background, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4, section.has-light-background h5, section.has-light-background h6 {
   color: #222;
 }
@@ -44,6 +39,8 @@ section.has-light-background, section.has-light-background h1, section.has-light
   --r-link-color-hover: #78b9e6;
   --r-selection-background-color: #d33682;
   --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 240, 240, 240;
+  --r-overlay-element-fg-color: 0, 0, 0;
 }
 
 .reveal-viewport {

dist/theme/night.css

@@ -37,6 +37,8 @@ section.has-light-background, section.has-light-background h1, section.has-light
   --r-link-color-hover: #f3d7ac;
   --r-selection-background-color: #e7ad52;
   --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 240, 240, 240;
+  --r-overlay-element-fg-color: 0, 0, 0;
 }
 
 .reveal-viewport {

dist/theme/serif.css

@@ -40,6 +40,8 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
   --r-link-color-hover: #8b7c69;
   --r-selection-background-color: #26351C;
   --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 0, 0, 0;
+  --r-overlay-element-fg-color: 240, 240, 240;
 }
 
 .reveal-viewport {

dist/theme/simple.css

@@ -39,6 +39,8 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
   --r-link-color-hover: #0000f1;
   --r-selection-background-color: rgba(0, 0, 0, 0.99);
   --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 0, 0, 0;
+  --r-overlay-element-fg-color: 240, 240, 240;
 }
 
 .reveal-viewport {

dist/theme/sky.css

@@ -41,6 +41,8 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
   --r-link-color-hover: #74a7cb;
   --r-selection-background-color: #134674;
   --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 0, 0, 0;
+  --r-overlay-element-fg-color: 240, 240, 240;
 }
 
 .reveal-viewport {

dist/theme/solarized.css

@@ -40,6 +40,8 @@ html * {
   --r-link-color-hover: #78b9e6;
   --r-selection-background-color: #d33682;
   --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 0, 0, 0;
+  --r-overlay-element-fg-color: 240, 240, 240;
 }
 
 .reveal-viewport {

dist/theme/white-contrast.css

@@ -0,0 +1,362 @@
+/**
+ * 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;
+  --r-overlay-element-bg-color: 0, 0, 0;
+  --r-overlay-element-fg-color: 240, 240, 240;
+}
+
+.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

@@ -36,6 +36,8 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
   --r-link-color-hover: #6ca0e8;
   --r-selection-background-color: #98bdef;
   --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 0, 0, 0;
+  --r-overlay-element-fg-color: 240, 240, 240;
 }
 
 .reveal-viewport {

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/markdown.html

@@ -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">

examples/scroll.html

@@ -0,0 +1,118 @@
+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - Scroll View</title>
+
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+
+		<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="../plugin/highlight/monokai.css">
+	</head>
+
+	<body>
+
+		<div class="reveal">
+
+			<div class="slides">
+
+				<section><h1>Scroll View</h1></section>
+				<section data-background="indigo">
+					<h2>Scroll triggered fragments</h2>
+					<ul>
+						<li class="fragment fade-left">Step one</li>
+						<li class="fragment fade-left">Step two</li>
+						<li class="fragment fade-left">Step three</li>
+					</ul>
+				</section>
+				<section data-background-color="#fff"><h2>Scrollbar inverts<br>based on slide bg</h2></section>
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<h2>Auto-Animate</h2>
+					<p>Scroll triggered auto-animations 😍</p>
+					<div class="r-hstack justify-center">
+						<div data-id="box1" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+						<div data-id="box2" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+						<div data-id="box3" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+					</div>
+				</section>
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<div class="r-hstack justify-center">
+						<div data-id="box1" data-auto-animate-delay="0" style="background: cyan; width: 150px; height: 100px; margin: 10px;"></div>
+						<div data-id="box2" data-auto-animate-delay="0.1" style="background: magenta; width: 150px; height: 100px; margin: 10px;"></div>
+						<div data-id="box3" data-auto-animate-delay="0.2" style="background: yellow; width: 150px; height: 100px; margin: 10px;"></div>
+					</div>
+					<h2 style="margin-top: 20px;">Auto-Animate</h2>
+				</section>
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<div class="r-stack">
+						<div data-id="box1" style="background: cyan; width: 300px; height: 300px; border-radius: 200px;"></div>
+						<div data-id="box2" style="background: magenta; width: 200px; height: 200px; border-radius: 200px;"></div>
+						<div data-id="box3" style="background: yellow; width: 100px; height: 100px; border-radius: 200px;"></div>
+					</div>
+					<h2 style="margin-top: 20px;">Auto-Animate</h2>
+				</section>
+				<section data-background-gradient="linear-gradient(to bottom, #283b95, #17b2c3)" id="gradient-bg">
+					<h2 data-id="code-title">Code highlights,<br />meet scroll triggers</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 (
+						    <div>
+						      <p>You clicked {count} times</p>
+						      <button onClick={() => setCount(count + 1)}>
+						        Click me
+						      </button>
+						    </div>
+						  );
+						}
+
+						function SecondExample() {
+						  const [count, setCount] = useState(0);
+
+						  return (
+						    <div>
+						      <p>You clicked {count} times</p>
+						      <button onClick={() => setCount(count + 1)}>
+						        Click me
+						      </button>
+						    </div>
+						  );
+						}
+					</script></code></pre>
+				</section>
+				<section class="stack">
+          <section data-background="https://static.slid.es/reveal/image-placeholder.png" id="image-bg">
+            <h2>Image Backgrounds</h2>
+          </section>
+          <section data-background-video-muted 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">
+            <h2>Video background</h2>
+          </section>
+        </section>
+				<section><h2>The end</h2></section>
+
+			</div>
+
+		</div>
+
+		<script src="../dist/reveal.js"></script>
+		<script src="../plugin/notes/notes.js"></script>
+		<script src="../plugin/markdown/markdown.js"></script>
+		<script src="../plugin/highlight/highlight.js"></script>
+		<script>
+      Reveal.initialize({
+        view: 'scroll',
+        hash: true,
+
+				plugins: [ RevealMarkdown, RevealHighlight, RevealNotes ]
+			});
+    </script>
+
+	</body>
+</html>

gulpfile.js

@@ -1,13 +1,11 @@
 const pkg = require('./package.json')
-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 terser = require('@rollup/plugin-terser')
 const babel = require('@rollup/plugin-babel').default
 const commonjs = require('@rollup/plugin-commonjs')
 const resolve = require('@rollup/plugin-node-resolve').default
@@ -31,7 +29,7 @@ const banner = `/*!
 * ${pkg.homepage}
 * MIT licensed
 *
-* Copyright (C) 2011-2022 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
@@ -164,11 +162,10 @@ function compileSass() {
 
     sass.render({
         data: transformedFile.contents.toString(),
-        includePaths: ['css/', 'css/theme/template']
+        file: transformedFile.path,
     }, ( err, result ) => {
         if( err ) {
-            console.log( vinylFile.path );
-            console.log( err.formatted );
+            callback(err);
         }
         else {
             transformedFile.extname = '.css';
@@ -278,7 +275,7 @@ gulp.task('package', gulp.series(() =>
             './lib/**',
             './images/**',
             './plugin/**',
-            './**.md'
+            './**/*.md'
         ],
         { base: './' }
     )
@@ -286,7 +283,7 @@ gulp.task('package', gulp.series(() =>
 
 ))
 
-gulp.task('reload', () => gulp.src(['*.html', '*.md'])
+gulp.task('reload', () => gulp.src(['index.html'])
     .pipe(connect.reload()));
 
 gulp.task('serve', () => {
@@ -298,14 +295,19 @@ gulp.task('serve', () => {
         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', 'eslint'))
 
     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'))
 

index.html

@@ -1,197 +1,23 @@
-<!DOCTYPE html>
-<html>
+<!doctype 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"
-    />
+		<meta charset="utf-8">
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
 
 		<title>reveal.js</title>
 
-    <link rel="stylesheet" href="dist/reset.css" />
-    <link rel="stylesheet" href="dist/reveal.css" />
-    <link rel="stylesheet" href="dist/theme/serif.css" />
+		<link rel="stylesheet" href="dist/reset.css">
+		<link rel="stylesheet" href="dist/reveal.css">
+		<link rel="stylesheet" href="dist/theme/black.css">
 
 		<!-- Theme used for syntax highlighted code -->
-    <link rel="stylesheet" href="plugin/highlight/monokai.css" />
+		<link rel="stylesheet" href="plugin/highlight/monokai.css">
 	</head>
 	<body>
 		<div class="reveal">
 			<div class="slides">
-        <section data-markdown>
-          ![logo](./images/logo.png)
-
-          ### Accounting Internship Report
-
-          - Author: CHEN Yongyuan (Walter)
-          - Report date: 2022-11-09
-
-          Note:
-          My name is Walter.
-
-          First of all, I am very happy that I can share my accounting internship experience here.
-
-          During last summer holiday, I took an internship at Grant Thornton.
-        </section>
-        <section data-markdown>
-          ### Agenda
-
-          1. About the accounting internship
-          2. Details of the internship project
-          3. Key lessons learned
-          4. Suggestion
-        </section>
-        <section>
-          <section
-            data-background-image="./images/haiyoulogo.png"
-            data-background-size="contain"
-            data-background-opacity="0.139"
-            >
-            <h3>Accounting Internship Overview</h3>
-            <ul>
-              <li class="fragment">
-              🏠 Company: China National Offshore Oil Corp
-                (<b>CNOOC Guangdong Sales Co. Ltd</b>)
-              </li>
-              <aside class="notes">
-              <p>
-                The company we audited was CNOOC which this is a huge group coporation.
-                Our team is focusing on the CNOOC Guangdong sales company.
-              </p>
-              </aside>
-              <li class="fragment">👨 Supervisor: FU Kaijun</li>
-              <aside class="notes">
-                <p>
-                My supervisor, also our team leader, is FU kaijun.
-                </p>
-              </aside>
-              <li class="fragment">👕 Role: Audit assistant of Guangdong audit team</li>
-              <aside class="notes">
-                <p>
-                My role in the audit team is audit assistant.
-                I assist the team to do some of the perform substantive procedures.
-                Also, I check for errors in the subsidiary's financial reports and parent's consolidated financial statements.
-                Then I summarize my work into audit working paper.
-                </p>
-              </aside>
-              <li class="fragment">🌍 Location: Guangdong area (Zhanjiang, Zhuhai, Jiangmen, and Guangzhou)</li>
-              <aside class="notes">
-                <p>
-                There are many subsidiaries in Guangdong, and our team is mainly responsible for (these places).
-                and finally, we returned to the parent company in Guangzhou to do the work related to consolidation.
-                </p>
-              </aside>
-            </ul>
-            <p class="fragment" style="text-align: left;">
-              My job is to perform
-              <span class="fragment highlight-red">substantive procedures</span>,
-              <span class="fragment highlight-green">prepare audit working paper</span>,
-              and <span class="fragment highlight-blue">write programs</span> to reduce repetitive work.
-            </p>
-          </section>
-          <section data-background-image="./images/guquanjiegou.png" data-background-size="contain">
-            <aside class="notes">
-              This is the equity strcture.
-              Our team is focusing on the CNOOC Guangdong sales company which has more than 27 subsidiaries.
-            </aside>
-          </section>
-          <section data-background-image="./images/oil.jpg" data-background-size="contain">
-            <aside class="notes">
-              We go to each subsidiary's gas station to check fixed assets and oil inventory.
-            </aside>
-          </section>
-          <section data-background-image="./images/paper.jpg" data-background-size="contain">
-            <aside class="notes">
-              In this photo, we use sampling method to get a checklist, and then we go to the office to look for the corresponding accounting documents according to the checklist.
-            </aside>
-          </section>
-          <section data-background-image="./images/report.png" data-background-size="contain">
-            <aside class="notes">
-              And another of my job, which is probably why I got hired, is to write a computer program to automatically transfer some data from excel to word report.
-              Because during the interview they asked my lots of question about the PDF and excel processing.
-            </aside>
-          </section>
-          <section data-background-image="./images/highlight.png" data-background-size="contain"></section>
-          <section data-background-image="./images/excel.png" data-background-size="contain"></section>
-        </section>
-        <section>
-        <section data-markdown>
-            ### Key Lessons Learned
-
-            > If there is anything unsure, be sure to ask.
-
-            Notes:
-            Although I had not taken any auditing course when I start the internship, I still manage to learn some basic concept before I went to workplace.
-            During the internship, I learned a lot, not just accounting and auditing standard such as consolidated financial statement.
-            Also include work etiquette, communication methods, etc.
-
-            The first lessons I learned, also the first thing my supervisor told my in the work, is if there anything unsure, be sure to ask.
-            Let me explain.
-
-            Our audit schedule is very tight.
-            We spent most of our time in reviewing and correcting errors in financial statements.
-            After we audit the subsidiaries individual financial statement, then we will put them together and review the consolidated financial statement.
-            At the same time, we will also prepare audit papers.
-            So that means if there are errors in subsidiary's statement, but found it during the consolidated process, that means we need to go back to readjust the consolidated statement and audit worksheet.
-            This will not only slow down the entire audit project, but also add extra workload to other team members.
-          </section>
-          <section data-markdown>
-            ### Key Lessons Learned
-
-            > Don't work hard, work smart!
-
-            Notes:
-            The difference between work hard and work smart is how much time you spend in completing tasks. Hard work tends to be when someone spends a great amout of time completing many things, while smart work is when they spend more time to find the right way to complete right things.
-
-            A very typically example during my internship is. Once we use scanner to scan hundreds of documents and needed to rename those file in certain order. On of my co-worker said "Okey, just give me one hour I will rename them one by one". However the correct way to do that is simply select all files, and press F2 then you can rename all files at once.
-            
-            At that time I didn't know that F2 is the shortcut to rename files, but I am sure there must be some way to do this task quickly, so I spent two minutes seaerching on Baidu, and spend one minute to complete the task.
-
-            In general, if you find yourself doing a very repetitive task, there may be a smater way to accomplish the task. Never stop learning new knowledge.
-          </section>
-        </section>
-        <section>
-          <section data-markdown>
-            ## Suggestion
-          </section>
-          <section data-markdown>
-            ## For the Company
-
-            > Information Island: Data in system that has no external connectivity.
-
-            - Can't sync/compare data between systems
-            - Require manually input data
-            - Involve more errors
-            - Increase complexity
-
-            Invest on developing a all-in-one solution system or pipeline between system, and traning employee to use the system.
-
-            Notes:
-
-            SAP, 久其报表，海油卡
-          </section>
-          <section data-markdown>
-            ## For the Accounting Program
-
-            - Set a file naming standard
-              - Instead of something like `Water final ver.2 (1).docx`
-            - Set a version control system for the files
-            - Automate repetitive tasks
-          </section>
-          <section>
-            <h2>For Future Accounting Interns</h2>
-            <ul>
-              <li class="fragment">Get an accounting certification</li>
-              <li class="fragment">Be familiar with Chinese tax & laws</li>
-              <li class="fragment">Learn a programming language (Recommend: <code>Python</code>)</li>
-            </ul>
-          </section>
-        </section>
-        <section>
-          <h1>Thank you</h1>
-          <p>for listining</p>
-        </section>
+				<section>Slide 1</section>
+				<section>Slide 2</section>
 			</div>
 		</div>
 
@@ -199,18 +25,15 @@
 		<script src="plugin/notes/notes.js"></script>
 		<script src="plugin/markdown/markdown.js"></script>
 		<script src="plugin/highlight/highlight.js"></script>
-    <script src="plugin/zoom/zoom.js"></script>
 		<script>
 			// More info about initialization & config:
 			// - https://revealjs.com/initialization/
 			// - https://revealjs.com/config/
 			Reveal.initialize({
 				hash: true,
-        width: 1920,
-        height: 1080,
 
 				// Learn about plugins: https://revealjs.com/plugins/
-        plugins: [RevealMarkdown, RevealHighlight, RevealNotes, RevealZoom],
+				plugins: [ RevealMarkdown, RevealHighlight, RevealNotes ]
 			});
 		</script>
 	</body>

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,
 
@@ -253,6 +256,36 @@ export default {
 	parallaxBackgroundHorizontal: null,
 	parallaxBackgroundVertical: null,
 
+	// Can be used to initialize reveal.js in one of the following views:
+	// - print:   Render the presentation so that it can be printed to PDF
+	// - scroll:  Show the presentation as a tall scrollable page with scroll
+	//            triggered animations
+	view: null,
+
+	// Adjusts the height of each slide in the scroll view.
+	// - full:       Each slide is as tall as the viewport
+	// - compact:    Slides are as small as possible, allowing multiple slides
+	//               to be visible in parallel on tall devices
+	scrollLayout: 'full',
+
+	// Control how scroll snapping works in the scroll view.
+	// - false:   	No snapping, scrolling is continuous
+	// - proximity:  Snap when close to a slide
+	// - mandatory:  Always snap to the closest slide
+	//
+	// Only applies to presentations in scroll view.
+	scrollSnap: 'mandatory',
+
+	// Enables and configure the scroll view progress bar.
+	// - 'auto':    Show the scrollbar while scrolling, hide while idle
+	// - true:      Always show the scrollbar
+	// - false:     Never show the scrollbar
+	scrollProgress: 'auto',
+
+	// Automatically activate the scroll view when we the viewport falls
+	// below the given width.
+	scrollActivationWidth: 435,
+
 	// The maximum number of pages a single slide can expand onto when printing
 	// to PDF, unlimited by default
 	pdfMaxPagesPerSlide: Number.POSITIVE_INFINITY,
@@ -284,6 +317,10 @@ export default {
 	// Time before the cursor is hidden (in ms)
 	hideCursorTime: 5000,
 
+	// Should we automatically sort and set indices for fragments
+	// at each sync? (See Reveal.sync)
+	sortFragmentsOnSync: true,
+
 	// Script dependencies to load
 	dependencies: [],
 

js/controllers/autoanimate.js

@@ -461,7 +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' );
 		} );
@@ -504,7 +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,
@@ -573,14 +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.
@@ -608,7 +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

js/controllers/backgrounds.js

@@ -190,10 +190,30 @@ export default class Backgrounds {
 		if( data.backgroundPosition ) contentElement.style.backgroundPosition = data.backgroundPosition;
 		if( data.backgroundOpacity ) contentElement.style.opacity = data.backgroundOpacity;
 
+		const contrastClass = this.getContrastClass( slide );
+
+		if( typeof contrastClass === 'string' ) {
+			slide.classList.add( contrastClass );
+		}
+
+	}
+
+	/**
+	 * Returns a class name that can be applied to a slide to indicate
+	 * if it has a light or dark background.
+	 *
+	 * @param {*} slide
+	 *
+	 * @returns {string|null}
+	 */
+	getContrastClass( slide ) {
+
+		const element = slide.slideBackgroundElement;
+
 		// If this slide has a background color, we add a class that
 		// signals if it is light or dark. If the slide has no background
 		// color, no class will be added
-		let contrastColor = data.backgroundColor;
+		let contrastColor = slide.getAttribute( 'data-background-color' );
 
 		// If no bg color was found, or it cannot be converted by colorToRgb, check the computed background
 		if( !contrastColor || !colorToRgb( contrastColor ) ) {
@@ -211,14 +231,32 @@ export default class Backgrounds {
 			// an element with no background
 			if( rgb && rgb.a !== 0 ) {
 				if( colorBrightness( contrastColor ) < 128 ) {
-					slide.classList.add( 'has-dark-background' );
+					return 'has-dark-background';
 				}
 				else {
-					slide.classList.add( 'has-light-background' );
+					return 'has-light-background';
 				}
 			}
 		}
 
+		return null;
+
+	}
+
+	/**
+	 * Bubble the 'has-light-background'/'has-dark-background' classes.
+	 */
+	bubbleSlideContrastClassToElement( slide, target ) {
+
+		[ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {
+			if( slide.classList.contains( classToBubble ) ) {
+				target.classList.add( classToBubble );
+			}
+			else {
+				target.classList.remove( classToBubble );
+			}
+		}, this );
+
 	}
 
 	/**
@@ -263,10 +301,12 @@ export default class Backgrounds {
 
 					backgroundv.classList.remove( 'past', 'present', 'future' );
 
-					if( v < indices.v ) {
+					const indexv = typeof indices.v === 'number' ? indices.v : 0;
+
+					if( v < indexv ) {
 						backgroundv.classList.add( 'past' );
 					}
-					else if ( v > indices.v ) {
+					else if ( v > indexv ) {
 						backgroundv.classList.add( 'future' );
 					}
 					else {
@@ -322,14 +362,7 @@ export default class Backgrounds {
 		// If there's a background brightness flag for this slide,
 		// bubble it to the .reveal container
 		if( currentSlide ) {
-			[ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {
-				if( currentSlide.classList.contains( classToBubble ) ) {
-					this.Reveal.getRevealElement().classList.add( classToBubble );
-				}
-				else {
-					this.Reveal.getRevealElement().classList.remove( classToBubble );
-				}
-			}, this );
+			this.bubbleSlideContrastClassToElement( currentSlide, this.Reveal.getRevealElement() );
 		}
 
 		// Allow the first background to apply without transition

js/controllers/fragments.js

@@ -174,24 +174,23 @@ export default class Fragments {
 	 *
 	 * @return {{shown: array, hidden: array}}
 	 */
-	update( index, fragments ) {
+	update( index, fragments, slide = this.Reveal.getCurrentSlide() ) {
 
 		let changedFragments = {
 			shown: [],
 			hidden: []
 		};
 
-		let currentSlide = this.Reveal.getCurrentSlide();
-		if( currentSlide && this.Reveal.getConfig().fragments ) {
+		if( slide && this.Reveal.getConfig().fragments ) {
 
-			fragments = fragments || this.sort( currentSlide.querySelectorAll( '.fragment' ) );
+			fragments = fragments || this.sort( slide.querySelectorAll( '.fragment' ) );
 
 			if( fragments.length ) {
 
 				let maxIndex = 0;
 
 				if( typeof index !== 'number' ) {
-					let currentFragment = this.sort( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop();
+					let currentFragment = this.sort( slide.querySelectorAll( '.fragment.visible' ) ).pop();
 					if( currentFragment ) {
 						index = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
 					}
@@ -252,7 +251,7 @@ export default class Fragments {
 				// the current fragment index.
 				index = typeof index === 'number' ? index : -1;
 				index = Math.max( Math.min( index, maxIndex ), -1 );
-				currentSlide.setAttribute( 'data-fragment', index );
+				slide.setAttribute( 'data-fragment', index );
 
 			}
 

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

@@ -17,7 +17,6 @@ export default class Keyboard {
 		this.bindings = {};
 
 		this.onDocumentKeyDown = this.onDocumentKeyDown.bind( this );
-		this.onDocumentKeyPress = this.onDocumentKeyPress.bind( this );
 
 	}
 
@@ -43,6 +42,7 @@ export default class Keyboard {
 		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';
 
 	}
@@ -53,7 +53,6 @@ export default class Keyboard {
 	bind() {
 
 		document.addEventListener( 'keydown', this.onDocumentKeyDown, false );
-		document.addEventListener( 'keypress', this.onDocumentKeyPress, false );
 
 	}
 
@@ -63,7 +62,6 @@ export default class Keyboard {
 	unbind() {
 
 		document.removeEventListener( 'keydown', this.onDocumentKeyDown, false );
-		document.removeEventListener( 'keypress', this.onDocumentKeyPress, false );
 
 	}
 
@@ -134,20 +132,6 @@ export default class Keyboard {
 
 	}
 
-	/**
-	 * Handler for the document level 'keypress' event.
-	 *
-	 * @param {object} event
-	 */
-	onDocumentKeyPress( event ) {
-
-		// Check if the pressed key is question mark
-		if( event.shiftKey && event.charCode === 63 ) {
-			this.Reveal.toggleHelp();
-		}
-
-	}
-
 	/**
 	 * Handler for the document level 'keydown' event.
 	 *
@@ -183,10 +167,10 @@ export default class Keyboard {
 		let activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);
 
 		// Whitelist certain modifiers for slide navigation shortcuts
-		let isNavigationKey = [32, 37, 38, 39, 40, 78, 80].indexOf( event.keyCode ) !== -1;
+		let keyCodeUsesModifier = [32, 37, 38, 39, 40, 78, 80, 191].indexOf( event.keyCode ) !== -1;
 
 		// Prevent all other events when a modifier is pressed
-		let unusedModifier = 	!( isNavigationKey && event.shiftKey || event.altKey ) &&
+		let unusedModifier = 	!( keyCodeUsesModifier && event.shiftKey || event.altKey ) &&
 								( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );
 
 		// Disregard the event if there's a focused element or a
@@ -350,7 +334,7 @@ export default class Keyboard {
 				}
 			}
 			// TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS "BLACK SCREEN" BUTTON
-			else if( keyCode === 58 || keyCode === 59 || keyCode === 66 || keyCode === 86 || keyCode === 190 || keyCode === 191 ) {
+			else if( [58, 59, 66, 86, 190].includes( keyCode ) || ( keyCode === 191 && !event.shiftKey ) ) {
 				this.Reveal.togglePause();
 			}
 			// F
@@ -363,6 +347,16 @@ export default class Keyboard {
 					this.Reveal.toggleAutoSlide( autoSlideWasPaused );
 				}
 			}
+			// G
+			else if( keyCode === 71 ) {
+				if( config.jumpToSlide ) {
+					this.Reveal.toggleJumpToSlide();
+				}
+			}
+			// ?
+			else if( keyCode === 191 && event.shiftKey ) {
+				this.Reveal.toggleHelp();
+			}
 			else {
 				triggered = false;
 			}

js/controllers/location.js

@@ -40,7 +40,7 @@ export default class Location {
 	 *
 	 * @returns slide indices or null
 	 */
-	getIndicesFromHash( hash=window.location.hash ) {
+	getIndicesFromHash( hash=window.location.hash, options={} ) {
 
 		// Attempt to parse the hash as either an index or name
 		let name = hash.replace( /^#\/?/, '' );
@@ -49,7 +49,7 @@ export default class Location {
 		// 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;
 
@@ -62,17 +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');
 			}
 			catch ( error ) { }
 
-			if( element ) {
-				return { ...this.Reveal.getIndices( element ), f };
+			if( slide ) {
+				return { ...this.Reveal.getIndices( slide ), f };
 			}
 		}
 		else {
 			const config = this.Reveal.getConfig();
-			let hashIndexBase = config.hashOneBasedIndex ? 1 : 0;
+			let hashIndexBase = config.hashOneBasedIndex || options.oneBasedIndex ? 1 : 0;
 
 			// Read the index components of the hash
 			let h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,
@@ -139,7 +141,7 @@ export default class Location {
 			let hash = this.getHash();
 
 			// If we're configured to push to history OR the history
-			// API is not avaialble.
+			// API is not available.
 			if( config.history ) {
 				window.location.hash = hash;
 			}

js/controllers/notes.js

@@ -38,10 +38,12 @@ export default class Notes {
 	 */
 	update() {
 
-		if( this.Reveal.getConfig().showNotes && this.element && this.Reveal.getCurrentSlide() && !this.Reveal.print.isPrintingPDF() ) {
-
+		if( this.Reveal.getConfig().showNotes &&
+			this.element && this.Reveal.getCurrentSlide() &&
+			!this.Reveal.isScrollView() &&
+			!this.Reveal.isPrintView()
+		) {
 			this.element.innerHTML = this.getSlideNotes() || '<span class="notes-placeholder">No notes on this slide.</span>';
-
 		}
 
 	}
@@ -54,7 +56,11 @@ export default class Notes {
 	 */
 	updateVisibility() {
 
-		if( this.Reveal.getConfig().showNotes && this.hasNotes() && !this.Reveal.print.isPrintingPDF() ) {
+		if( this.Reveal.getConfig().showNotes &&
+			this.hasNotes() &&
+			!this.Reveal.isScrollView() &&
+			!this.Reveal.isPrintView()
+		) {
 			this.Reveal.getRevealElement().classList.add( 'show-notes' );
 		}
 		else {

js/controllers/overview.js

@@ -24,7 +24,7 @@ export default class Overview {
 	activate() {
 
 		// Only proceed if enabled in config
-		if( this.Reveal.getConfig().overview && !this.isActive() ) {
+		if( this.Reveal.getConfig().overview && !this.Reveal.isScrollView() && !this.isActive() ) {
 
 			this.active = true;
 

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()`.
 	 */

js/controllers/pointer.js

@@ -27,12 +27,10 @@ export default class Pointer {
 	configure( config, oldConfig ) {
 
 		if( config.mouseWheel ) {
-			document.addEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false ); // FF
-			document.addEventListener( 'mousewheel', this.onDocumentMouseScroll, false );
+			document.addEventListener( 'wheel', this.onDocumentMouseScroll, false );
 		}
 		else {
-			document.removeEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false ); // FF
-			document.removeEventListener( 'mousewheel', this.onDocumentMouseScroll, false );
+			document.removeEventListener( 'wheel', this.onDocumentMouseScroll, false );
 		}
 
 		// Auto-hide the mouse pointer when its inactive
@@ -79,8 +77,7 @@ export default class Pointer {
 
 		this.showCursor();
 
-		document.removeEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false );
-		document.removeEventListener( 'mousewheel', this.onDocumentMouseScroll, false );
+		document.removeEventListener( 'wheel', this.onDocumentMouseScroll, false );
 		document.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );
 		document.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );
 

js/controllers/printview.js

@@ -4,7 +4,7 @@ import { queryAll, createStyleSheet } from '../utils/util.js'
 /**
  * Setups up our presentation for printing/exporting to PDF.
  */
-export default class Print {
+export default class PrintView {
 
 	constructor( Reveal ) {
 
@@ -16,7 +16,7 @@ export default class Print {
 	 * Configures the presentation for printing to a static
 	 * PDF.
 	 */
-	async setupPDF() {
+	async activate() {
 
 		const config = this.Reveal.getConfig();
 		const slides = queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR )
@@ -42,11 +42,11 @@ export default class Print {
 		// Limit the size of certain elements to the dimensions of the slide
 		createStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );
 
-		document.documentElement.classList.add( 'print-pdf' );
+		document.documentElement.classList.add( 'reveal-print', 'print-pdf' );
 		document.body.style.width = pageWidth + 'px';
 		document.body.style.height = pageHeight + 'px';
 
-		const viewportElement = document.querySelector( '.reveal-viewport' );
+		const viewportElement = this.Reveal.getViewportElement();
 		let presentationBackground;
 		if( viewportElement ) {
 			const viewportStyles = window.getComputedStyle( viewportElement );
@@ -226,11 +226,11 @@ export default class Print {
 	}
 
 	/**
-	 * Checks if this instance is being used to print a PDF.
+	 * Checks if the print mode is/should be activated.
 	 */
-	isPrintingPDF() {
+	isActive() {
 
-		return ( /print-pdf/gi ).test( window.location.search );
+		return this.Reveal.getConfig().view === 'print';
 
 	}
 

js/controllers/scrollview.js

@@ -0,0 +1,888 @@
+import { HORIZONTAL_SLIDES_SELECTOR } from '../utils/constants.js'
+import { queryAll } from '../utils/util.js'
+
+const HIDE_SCROLLBAR_TIMEOUT = 500;
+const MAX_PROGRESS_SPACING = 4;
+const MIN_PROGRESS_SEGMENT_HEIGHT = 6;
+const MIN_PLAYHEAD_HEIGHT = 8;
+
+/**
+ * The scroll view lets you read a reveal.js presentation
+ * as a linear scrollable page.
+ */
+export default class ScrollView {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+		this.active = false;
+		this.activatedCallbacks = [];
+
+		this.onScroll = this.onScroll.bind( this );
+
+	}
+
+	/**
+	 * Activates the scroll view. This rearranges the presentation DOM
+	 * by—among other things—wrapping each slide in a page element.
+	 */
+	activate() {
+
+		if( this.active ) return;
+
+		const stateBeforeActivation = this.Reveal.getState();
+
+		this.active = true;
+
+		// Store the full presentation HTML so that we can restore it
+		// when/if the scroll view is deactivated
+		this.slideHTMLBeforeActivation = this.Reveal.getSlidesElement().innerHTML;
+
+		const horizontalSlides = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_SLIDES_SELECTOR );
+
+		this.viewportElement.classList.add( 'loading-scroll-mode', 'reveal-scroll' );
+
+		let presentationBackground;
+
+		const viewportStyles = window.getComputedStyle( this.viewportElement );
+		if( viewportStyles && viewportStyles.background ) {
+			presentationBackground = viewportStyles.background;
+		}
+
+		const pageElements = [];
+		const pageContainer = horizontalSlides[0].parentNode;
+
+		let previousSlide;
+
+		// Creates a new page element and appends the given slide/bg
+		// to it.
+		const createPageElement = ( slide, h, v ) => {
+
+			let contentContainer;
+
+			// If this slide is part of an auto-animation sequence, we
+			// group it under the same page element as the previous slide
+			if( previousSlide && this.Reveal.shouldAutoAnimateBetween( previousSlide, slide ) ) {
+				contentContainer = document.createElement( 'div' );
+				contentContainer.className = 'scroll-page-content scroll-auto-animate-page';
+				contentContainer.style.display = 'none';
+				previousSlide.closest( '.scroll-page-content' ).parentNode.appendChild( contentContainer );
+			}
+			else {
+				// Wrap the slide in a page element and hide its overflow
+				// so that no page ever flows onto another
+				const page = document.createElement( 'div' );
+				page.className = 'scroll-page';
+				pageElements.push( page );
+
+				// Copy the presentation-wide background to each page
+				if( presentationBackground ) {
+					page.style.background = presentationBackground;
+				}
+
+				const stickyContainer = document.createElement( 'div' );
+				stickyContainer.className = 'scroll-page-sticky';
+				page.appendChild( stickyContainer );
+
+				contentContainer = document.createElement( 'div' );
+				contentContainer.className = 'scroll-page-content';
+				stickyContainer.appendChild( contentContainer );
+			}
+
+			contentContainer.appendChild( slide );
+
+			slide.classList.remove( 'past', 'future' );
+			slide.setAttribute( 'data-index-h', h );
+			slide.setAttribute( 'data-index-v', v );
+
+			if( slide.slideBackgroundElement ) {
+				slide.slideBackgroundElement.remove( 'past', 'future' );
+				contentContainer.insertBefore( slide.slideBackgroundElement, slide );
+			}
+
+			previousSlide = slide;
+
+		}
+
+		// Slide and slide background layout
+		horizontalSlides.forEach( ( horizontalSlide, h ) => {
+
+			if( this.Reveal.isVerticalStack( horizontalSlide ) ) {
+				horizontalSlide.querySelectorAll( 'section' ).forEach( ( verticalSlide, v ) => {
+					createPageElement( verticalSlide, h, v );
+				});
+			}
+			else {
+				createPageElement( horizontalSlide, h, 0 );
+			}
+
+		}, this );
+
+		this.createProgressBar();
+
+		// Remove leftover stacks
+		queryAll( this.Reveal.getRevealElement(), '.stack' ).forEach( stack => stack.remove() );
+
+		// Add our newly created pages to the DOM
+		pageElements.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() );
+
+		this.Reveal.layout();
+		this.Reveal.setState( stateBeforeActivation );
+
+		this.activatedCallbacks.forEach( callback => callback() );
+		this.activatedCallbacks = [];
+
+		this.restoreScrollPosition();
+
+		this.viewportElement.classList.remove( 'loading-scroll-mode' );
+		this.viewportElement.addEventListener( 'scroll', this.onScroll, { passive: true } );
+
+	}
+
+	/**
+	 * Deactivates the scroll view and restores the standard slide-based
+	 * presentation.
+	 */
+	deactivate() {
+
+		if( !this.active ) return;
+
+		const stateBeforeDeactivation = this.Reveal.getState();
+
+		this.active = false;
+
+		this.viewportElement.removeEventListener( 'scroll', this.onScroll );
+		this.viewportElement.classList.remove( 'reveal-scroll' );
+
+		this.removeProgressBar();
+
+		this.Reveal.getSlidesElement().innerHTML = this.slideHTMLBeforeActivation;
+		this.Reveal.sync();
+		this.Reveal.setState( stateBeforeDeactivation );
+
+		this.slideHTMLBeforeActivation = null;
+
+	}
+
+	toggle( override ) {
+
+		if( typeof override === 'boolean' ) {
+			override ? this.activate() : this.deactivate();
+		}
+		else {
+			this.isActive() ? this.deactivate() : this.activate();
+		}
+
+	}
+
+	/**
+	 * Checks if the scroll view is currently active.
+	 */
+	isActive() {
+
+		return this.active;
+
+	}
+
+	/**
+	 * Renders the progress bar component.
+	 */
+	createProgressBar() {
+
+		this.progressBar = document.createElement( 'div' );
+		this.progressBar.className = 'scrollbar';
+
+		this.progressBarInner = document.createElement( 'div' );
+		this.progressBarInner.className = 'scrollbar-inner';
+		this.progressBar.appendChild( this.progressBarInner );
+
+		this.progressBarPlayhead = document.createElement( 'div' );
+		this.progressBarPlayhead.className = 'scrollbar-playhead';
+		this.progressBarInner.appendChild( this.progressBarPlayhead );
+
+		this.viewportElement.insertBefore( this.progressBar, this.viewportElement.firstChild );
+
+		const handleDocumentMouseMove	= ( event ) => {
+
+			let progress = ( event.clientY - this.progressBarInner.getBoundingClientRect().top ) / this.progressBarHeight;
+			progress = Math.max( Math.min( progress, 1 ), 0 );
+
+			this.viewportElement.scrollTop = progress * ( this.viewportElement.scrollHeight - this.viewportElement.offsetHeight );
+
+		};
+
+		const handleDocumentMouseUp = ( event ) => {
+
+			this.draggingProgressBar = false;
+			this.showProgressBar();
+
+			document.removeEventListener( 'mousemove', handleDocumentMouseMove );
+			document.removeEventListener( 'mouseup', handleDocumentMouseUp );
+
+		};
+
+		const handleMouseDown = ( event ) => {
+
+			event.preventDefault();
+
+			this.draggingProgressBar = true;
+
+			document.addEventListener( 'mousemove', handleDocumentMouseMove );
+			document.addEventListener( 'mouseup', handleDocumentMouseUp );
+
+			handleDocumentMouseMove( event );
+
+		};
+
+		this.progressBarInner.addEventListener( 'mousedown', handleMouseDown );
+
+	}
+
+	removeProgressBar() {
+
+		if( this.progressBar ) {
+			this.progressBar.remove();
+			this.progressBar = null;
+		}
+
+	}
+
+	layout() {
+
+		if( this.isActive() ) {
+			this.syncPages();
+			this.syncScrollPosition();
+		}
+
+	}
+
+	/**
+	 * Updates our pages to match the latest configuration and
+	 * presentation size.
+	 */
+	syncPages() {
+
+		const config = this.Reveal.getConfig();
+
+		const slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );
+		const scale = this.Reveal.getScale();
+		const useCompactLayout = config.scrollLayout === 'compact';
+
+		const viewportHeight = this.viewportElement.offsetHeight;
+		const compactHeight = slideSize.height * scale;
+		const pageHeight = useCompactLayout ? compactHeight : viewportHeight;
+
+		// The height that needs to be scrolled between scroll triggers
+		const scrollTriggerHeight = useCompactLayout ? compactHeight : viewportHeight;
+
+		this.viewportElement.style.setProperty( '--page-height', pageHeight + 'px' );
+		this.viewportElement.style.scrollSnapType = typeof config.scrollSnap === 'string' ? `y ${config.scrollSnap}` : '';
+
+		// This will hold all scroll triggers used to show/hide slides
+		this.slideTriggers = [];
+
+		const pageElements = Array.from( this.Reveal.getRevealElement().querySelectorAll( '.scroll-page' ) );
+
+		this.pages = pageElements.map( pageElement => {
+			const page = this.createPage({
+				pageElement,
+				slideElement: pageElement.querySelector( 'section' ),
+				stickyElement: pageElement.querySelector( '.scroll-page-sticky' ),
+				contentElement: pageElement.querySelector( '.scroll-page-content' ),
+				backgroundElement: pageElement.querySelector( '.slide-background' ),
+				autoAnimateElements: pageElement.querySelectorAll( '.scroll-auto-animate-page' ),
+				autoAnimatePages: []
+			});
+
+			page.pageElement.style.setProperty( '--slide-height', config.center === true ? 'auto' : slideSize.height + 'px' );
+
+			this.slideTriggers.push({
+				page: page,
+				activate: () => this.activatePage( page ),
+				deactivate: () => this.deactivatePage( page )
+			});
+
+			// Create scroll triggers that show/hide fragments
+			this.createFragmentTriggersForPage( page );
+
+			// Create scroll triggers for triggering auto-animate steps
+			if( page.autoAnimateElements.length > 0 ) {
+				this.createAutoAnimateTriggersForPage( page );
+			}
+
+			let totalScrollTriggerCount = Math.max( page.scrollTriggers.length - 1, 0 );
+
+			// Each auto-animate step may include its own scroll triggers
+			// for fragments, ensure we count those as well
+			totalScrollTriggerCount += page.autoAnimatePages.reduce( ( total, page ) => {
+				return total + Math.max( page.scrollTriggers.length - 1, 0 );
+			}, page.autoAnimatePages.length );
+
+			// Clean up from previous renders
+			page.pageElement.querySelectorAll( '.scroll-snap-point' ).forEach( el => el.remove() );
+
+			// Create snap points for all scroll triggers
+			// - Can't be absolute in FF
+			// - Can't be 0-height in Safari
+			// - Can't use snap-align on parent in Safari because then
+			//   inner triggers won't work
+			for( let i = 0; i < totalScrollTriggerCount + 1; i++ ) {
+				const triggerStick = document.createElement( 'div' );
+				triggerStick.className = 'scroll-snap-point';
+				triggerStick.style.height = scrollTriggerHeight + 'px';
+				triggerStick.style.scrollSnapAlign = useCompactLayout ? 'center' : 'start';
+				page.pageElement.appendChild( triggerStick );
+
+				if( i === 0 ) {
+					triggerStick.style.marginTop = -scrollTriggerHeight + 'px';
+				}
+			}
+
+			// In the compact layout, only slides with scroll triggers cover the
+			// full viewport height. This helps avoid empty gaps before or after
+			// a sticky slide.
+			if( useCompactLayout && page.scrollTriggers.length > 0 ) {
+				page.pageHeight = viewportHeight;
+				page.pageElement.style.setProperty( '--page-height', viewportHeight + 'px' );
+			}
+			else {
+				page.pageHeight = pageHeight;
+				page.pageElement.style.removeProperty( '--page-height' );
+			}
+
+			// Add scroll padding based on how many scroll triggers we have
+			page.scrollPadding = scrollTriggerHeight * totalScrollTriggerCount;
+
+			// The total height including scrollable space
+			page.totalHeight = page.pageHeight + page.scrollPadding;
+
+			// This is used to pad the height of our page in CSS
+			page.pageElement.style.setProperty( '--page-scroll-padding', page.scrollPadding + 'px' );
+
+			// If this is a sticky page, stick it to the vertical center
+			if( totalScrollTriggerCount > 0 ) {
+				page.stickyElement.style.position = 'sticky';
+				page.stickyElement.style.top = Math.max( ( viewportHeight - page.pageHeight ) / 2, 0 ) + 'px';
+			}
+			else {
+				page.stickyElement.style.position = 'relative';
+				page.pageElement.style.scrollSnapAlign = page.pageHeight < viewportHeight ? 'center' : 'start';
+			}
+
+			return page;
+		} );
+
+		this.setTriggerRanges();
+
+		/*
+		console.log(this.slideTriggers.map( t => {
+			return {
+				range: `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`,
+				triggers: t.page.scrollTriggers.map( t => {
+					return `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`
+				}).join( ', ' ),
+			}
+		}))
+		*/
+
+		this.viewportElement.setAttribute( 'data-scrollbar', config.scrollProgress );
+
+		if( config.scrollProgress && this.totalScrollTriggerCount > 1 ) {
+			// Create the progress bar if it doesn't already exist
+			if( !this.progressBar ) this.createProgressBar();
+
+			this.syncProgressBar();
+		}
+		else {
+			this.removeProgressBar();
+		}
+
+	}
+
+	/**
+	 * Calculates and sets the scroll range for all of our scroll
+	 * triggers.
+	 */
+	setTriggerRanges() {
+
+		// Calculate the total number of scroll triggers
+		this.totalScrollTriggerCount = this.slideTriggers.reduce( ( total, trigger ) => {
+			return total + Math.max( trigger.page.scrollTriggers.length, 1 );
+		}, 0 );
+
+		let rangeStart = 0;
+
+		// Calculate the scroll range of each scroll trigger on a scale
+		// of 0-1
+		this.slideTriggers.forEach( ( trigger, i ) => {
+			trigger.range = [
+				rangeStart,
+				rangeStart + Math.max( trigger.page.scrollTriggers.length, 1 ) / this.totalScrollTriggerCount
+			];
+
+			const scrollTriggerSegmentSize = ( trigger.range[1] - trigger.range[0] ) / trigger.page.scrollTriggers.length;
+
+			// Set the range for each inner scroll trigger
+			trigger.page.scrollTriggers.forEach( ( scrollTrigger, i ) => {
+				scrollTrigger.range = [
+					rangeStart + i * scrollTriggerSegmentSize,
+					rangeStart + ( i + 1 ) * scrollTriggerSegmentSize
+				];
+			} );
+
+			rangeStart = trigger.range[1];
+		} );
+
+	}
+
+	/**
+	 * Creates one scroll trigger for each fragments in the given page.
+	 *
+	 * @param {*} page
+	 */
+	createFragmentTriggersForPage( page, slideElement ) {
+
+		slideElement = slideElement || page.slideElement;
+
+		// 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.
+		const fragmentGroups = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment' ), true );
+
+		// Create scroll triggers that show/hide fragments
+		if( fragmentGroups.length ) {
+			page.fragments = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment:not(.disabled)' ) );
+			page.scrollTriggers.push(
+				// Trigger for the initial state with no fragments visible
+				{
+					activate: () => {
+						this.Reveal.fragments.update( -1, page.fragments, slideElement );
+					}
+				},
+
+				// Triggers for each fragment group
+				...fragmentGroups.map( ( fragments, i ) => ({
+						activate: () => {
+							this.Reveal.fragments.update( i, page.fragments, slideElement );
+						}
+					})
+				)
+			);
+		}
+
+
+		return page.scrollTriggers.length;
+
+	}
+
+	/**
+	 * Creates scroll triggers for the auto-animate steps in the
+	 * given page.
+	 *
+	 * @param {*} page
+	 */
+	createAutoAnimateTriggersForPage( page ) {
+
+		if( page.autoAnimateElements.length > 0 ) {
+
+			// Triggers for each subsequent auto-animate slide
+			this.slideTriggers.push( ...Array.from( page.autoAnimateElements ).map( ( autoAnimateElement, i ) => {
+				let autoAnimatePage = this.createPage({
+					slideElement: autoAnimateElement.querySelector( 'section' ),
+					contentElement: autoAnimateElement,
+					backgroundElement: autoAnimateElement.querySelector( '.slide-background' )
+				});
+
+				// Create fragment scroll triggers for the auto-animate slide
+				this.createFragmentTriggersForPage( autoAnimatePage, autoAnimatePage.slideElement );
+
+				page.autoAnimatePages.push( autoAnimatePage );
+
+				// Return our slide trigger
+				return {
+					page: autoAnimatePage,
+					activate: () => this.activatePage( autoAnimatePage ),
+					deactivate: () => this.deactivatePage( autoAnimatePage )
+				};
+			}));
+		}
+
+	}
+
+	/**
+	 * Helper method for creating a page definition and adding
+	 * required fields. A "page" is a slide or auto-animate step.
+	 */
+	createPage( page ) {
+
+		page.scrollTriggers = [];
+		page.indexh = parseInt( page.slideElement.getAttribute( 'data-index-h' ), 10 );
+		page.indexv = parseInt( page.slideElement.getAttribute( 'data-index-v' ), 10 );
+
+		return page;
+
+	}
+
+	/**
+	 * Rerenders progress bar segments so that they match the current
+	 * reveal.js config and size.
+	 */
+	syncProgressBar() {
+
+		this.progressBarInner.querySelectorAll( '.scrollbar-slide' ).forEach( slide => slide.remove() );
+
+		const scrollHeight = this.viewportElement.scrollHeight;
+		const viewportHeight = this.viewportElement.offsetHeight;
+		const viewportHeightFactor = viewportHeight / scrollHeight;
+
+		this.progressBarHeight = this.progressBarInner.offsetHeight;
+		this.playheadHeight = Math.max( viewportHeightFactor * this.progressBarHeight, MIN_PLAYHEAD_HEIGHT );
+		this.progressBarScrollableHeight = this.progressBarHeight - this.playheadHeight;
+
+		const progressSegmentHeight = viewportHeight / scrollHeight * this.progressBarHeight;
+		const spacing = Math.min( progressSegmentHeight / 8, MAX_PROGRESS_SPACING );
+
+		this.progressBarPlayhead.style.height = this.playheadHeight - spacing + 'px';
+
+		// Don't show individual segments if they're too small
+		if( progressSegmentHeight > MIN_PROGRESS_SEGMENT_HEIGHT ) {
+
+			this.slideTriggers.forEach( slideTrigger => {
+
+				const { page } = slideTrigger;
+
+				// Visual representation of a slide
+				page.progressBarSlide = document.createElement( 'div' );
+				page.progressBarSlide.className = 'scrollbar-slide';
+				page.progressBarSlide.style.top = slideTrigger.range[0] * this.progressBarHeight + 'px';
+				page.progressBarSlide.style.height = ( slideTrigger.range[1] - slideTrigger.range[0] ) * this.progressBarHeight - spacing + 'px';
+				page.progressBarSlide.classList.toggle( 'has-triggers', page.scrollTriggers.length > 0 );
+				this.progressBarInner.appendChild( page.progressBarSlide );
+
+				// Visual representations of each scroll trigger
+				page.scrollTriggerElements = page.scrollTriggers.map( ( trigger, i ) => {
+
+					const triggerElement = document.createElement( 'div' );
+					triggerElement.className = 'scrollbar-trigger';
+					triggerElement.style.top = ( trigger.range[0] - slideTrigger.range[0] ) * this.progressBarHeight + 'px';
+					triggerElement.style.height = ( trigger.range[1] - trigger.range[0] ) * this.progressBarHeight - spacing + 'px';
+					page.progressBarSlide.appendChild( triggerElement );
+
+					if( i === 0 ) triggerElement.style.display = 'none';
+
+					return triggerElement;
+
+				} );
+
+			} );
+
+		}
+		else {
+
+			this.pages.forEach( page => page.progressBarSlide = null );
+
+		}
+
+	}
+
+	/**
+	 * Reads the current scroll position and updates our active
+	 * trigger states accordingly.
+	 */
+	syncScrollPosition() {
+
+		const viewportHeight = this.viewportElement.offsetHeight;
+		const viewportHeightFactor = viewportHeight / this.viewportElement.scrollHeight;
+
+		const scrollTop = this.viewportElement.scrollTop;
+		const scrollHeight = this.viewportElement.scrollHeight - viewportHeight
+		const scrollProgress = Math.max( Math.min( scrollTop / scrollHeight, 1 ), 0 );
+		const scrollProgressMid = Math.max( Math.min( ( scrollTop + viewportHeight / 2 ) / this.viewportElement.scrollHeight, 1 ), 0 );
+
+		let activePage;
+
+		this.slideTriggers.forEach( ( trigger ) => {
+			const { page } = trigger;
+
+			const shouldPreload = scrollProgress >= trigger.range[0] - viewportHeightFactor*2 &&
+														scrollProgress <= trigger.range[1] + viewportHeightFactor*2;
+
+			// Load slides that are within the preload range
+			if( shouldPreload && !page.loaded ) {
+				page.loaded = true;
+				this.Reveal.slideContent.load( page.slideElement );
+			}
+			else if( page.loaded ) {
+				page.loaded = false;
+				this.Reveal.slideContent.unload( page.slideElement );
+			}
+
+			// If we're within this trigger range, activate it
+			if( scrollProgress >= trigger.range[0] && scrollProgress <= trigger.range[1] ) {
+				this.activateTrigger( trigger );
+				activePage = trigger.page;
+			}
+			// .. otherwise deactivate
+			else if( trigger.active ) {
+				this.deactivateTrigger( trigger );
+			}
+		} );
+
+		// Each page can have its own scroll triggers, check if any of those
+		// need to be activated/deactivated
+		if( activePage ) {
+			activePage.scrollTriggers.forEach( ( trigger ) => {
+				if( scrollProgressMid >= trigger.range[0] && scrollProgressMid <= trigger.range[1] ) {
+					this.activateTrigger( trigger );
+				}
+				else if( trigger.active ) {
+					this.deactivateTrigger( trigger );
+				}
+			} );
+		}
+
+		// Update our visual progress indication
+		this.setProgressBarValue( scrollTop / ( this.viewportElement.scrollHeight - viewportHeight ) );
+
+	}
+
+	/**
+	 * Moves the progress bar playhead to the specified position.
+	 *
+	 * @param {number} progress 0-1
+	 */
+	setProgressBarValue( progress ) {
+
+		if( this.progressBar ) {
+
+			this.progressBarPlayhead.style.transform = `translateY(${progress * this.progressBarScrollableHeight}px)`;
+
+			this.getAllPages()
+				.filter( page => page.progressBarSlide )
+				.forEach( ( page ) => {
+					page.progressBarSlide.classList.toggle( 'active', page.active === true );
+
+					page.scrollTriggers.forEach( ( trigger, i ) => {
+						page.scrollTriggerElements[i].classList.toggle( 'active', page.active === true && trigger.active === true );
+					} );
+				} );
+
+			this.showProgressBar();
+
+		}
+
+	}
+
+	/**
+	 * Show the progress bar and, if configured, automatically hide
+	 * it after a delay.
+	 */
+	showProgressBar() {
+
+		this.progressBar.classList.add( 'visible' );
+
+		clearTimeout( this.hideProgressBarTimeout );
+
+		if( this.Reveal.getConfig().scrollProgress === 'auto' && !this.draggingProgressBar ) {
+
+			this.hideProgressBarTimeout = setTimeout( () => {
+				if( this.progressBar ) {
+					this.progressBar.classList.remove( 'visible' );
+				}
+			}, HIDE_SCROLLBAR_TIMEOUT );
+
+		}
+
+	}
+
+	/**
+	 * Scrolls the given slide element into view.
+	 *
+	 * @param {HTMLElement} slideElement
+	 */
+	scrollToSlide( slideElement ) {
+
+		// If the scroll view isn't active yet, queue this action
+		if( !this.active ) {
+			this.activatedCallbacks.push( () => this.scrollToSlide( slideElement ) );
+		}
+		else {
+			// Find the trigger for this slide
+			const trigger = this.getScrollTriggerBySlide( slideElement );
+
+			if( trigger ) {
+				// Use the trigger's range to calculate the scroll position
+				this.viewportElement.scrollTop = trigger.range[0] * ( this.viewportElement.scrollHeight - this.viewportElement.offsetHeight );
+			}
+		}
+
+	}
+
+	/**
+	 * Persists the current scroll position to session storage
+	 * so that it can be restored.
+	 */
+	storeScrollPosition() {
+
+		clearTimeout( this.storeScrollPositionTimeout );
+
+		this.storeScrollPositionTimeout = setTimeout( () => {
+			sessionStorage.setItem( 'reveal-scroll-top', this.viewportElement.scrollTop );
+			sessionStorage.setItem( 'reveal-scroll-origin', location.origin + location.pathname );
+
+			this.storeScrollPositionTimeout = null;
+		}, 50 );
+
+	}
+
+	/**
+	 * Restores the scroll position when a deck is reloader.
+	 */
+	restoreScrollPosition() {
+
+		const scrollPosition = sessionStorage.getItem( 'reveal-scroll-top' );
+		const scrollOrigin = sessionStorage.getItem( 'reveal-scroll-origin' );
+
+		if( scrollPosition && scrollOrigin === location.origin + location.pathname ) {
+			this.viewportElement.scrollTop = parseInt( scrollPosition, 10 );
+		}
+
+	}
+
+	/**
+	 * Activates the given page and starts its embedded content
+	 * if there is any.
+	 *
+	 * @param {object} page
+	 */
+	activatePage( page ) {
+
+		if( !page.active ) {
+
+			page.active = true;
+
+			const { slideElement, backgroundElement, contentElement, indexh, indexv } = page;
+
+			contentElement.style.display = 'block';
+
+			slideElement.classList.add( 'present' );
+
+			if( backgroundElement ) {
+				backgroundElement.classList.add( 'present' );
+			}
+
+			this.Reveal.setCurrentScrollPage( slideElement, indexh, indexv );
+			this.Reveal.backgrounds.bubbleSlideContrastClassToElement( slideElement, this.viewportElement );
+
+			// If this page is part of an auto-animation there will be one
+			// content element per auto-animated page. We need to show the
+			// current page and hide all others.
+			Array.from( contentElement.parentNode.querySelectorAll( '.scroll-page-content' ) ).forEach( sibling => {
+				if( sibling !== contentElement ) {
+					sibling.style.display = 'none';
+				}
+			});
+
+		}
+
+	}
+
+	/**
+	 * Deactivates the page after it has been visible.
+	 *
+	 * @param {object} page
+	 */
+	deactivatePage( page ) {
+
+		if( page.active ) {
+
+			page.active = false;
+			page.slideElement.classList.remove( 'present' );
+			page.backgroundElement.classList.remove( 'present' );
+
+		}
+
+	}
+
+	activateTrigger( trigger ) {
+
+		if( !trigger.active ) {
+			trigger.active = true;
+			trigger.activate();
+		}
+
+	}
+
+	deactivateTrigger( trigger ) {
+
+		if( trigger.active ) {
+			trigger.active = false;
+
+			if( trigger.deactivate ) {
+				trigger.deactivate();
+			}
+		}
+
+	}
+
+	/**
+	 * Retrieve a slide by its original h/v index (i.e. the indices the
+	 * slide had before being linearized).
+	 *
+	 * @param {number} h
+	 * @param {number} v
+	 * @returns {HTMLElement}
+	 */
+	getSlideByIndices( h, v ) {
+
+		const page = this.getAllPages().find( page => {
+			return page.indexh === h && page.indexv === v;
+		} );
+
+		return page ? page.slideElement : null;
+
+	}
+
+	/**
+	 * Retrieve a list of all scroll triggers for the given slide
+	 * DOM element.
+	 *
+	 * @param {HTMLElement} slide
+	 * @returns {Array}
+	 */
+	getScrollTriggerBySlide( slide ) {
+
+		return this.slideTriggers.find( trigger => trigger.page.slideElement === slide );
+
+	}
+
+	/**
+	 * Get a list of all pages in the scroll view. This includes
+	 * both top-level slides and auto-animate steps.
+	 *
+	 * @returns {Array}
+	 */
+	getAllPages() {
+
+		return this.pages.flatMap( page => [page, ...(page.autoAnimatePages || [])] );
+
+	}
+
+	onScroll() {
+
+		this.syncScrollPosition();
+		this.storeScrollPosition();
+
+	}
+
+	get viewportElement() {
+
+		return this.Reveal.getViewportElement();
+
+	}
+
+}

js/controllers/slidecontent.js

@@ -1,4 +1,4 @@
-import { extend, queryAll, closest, getMimeTypeFromFile } from '../utils/util.js'
+import { extend, queryAll, closest, getMimeTypeFromFile, encodeRFC3986URI } from '../utils/util.js'
 import { isMobile } from '../utils/device.js'
 
 import fitty from 'fitty';
@@ -25,6 +25,10 @@ export default class SlideContent {
 	 */
 	shouldPreload( element ) {
 
+		if( this.Reveal.isScrollView() ) {
+			return true;
+		}
+
 		// Prefer an explicit global preload setting
 		let preload = this.Reveal.getConfig().preloadIframes;
 
@@ -108,7 +112,9 @@ export default class SlideContent {
 					// URL(s)
 					else {
 						backgroundContent.style.backgroundImage = backgroundImage.split( ',' ).map( background => {
-							return `url(${encodeURI(background.trim())})`;
+							// Decode URL(s) that are already encoded first
+							let decoded = decodeURI(background.trim());
+							return `url(${encodeRFC3986URI(decoded)})`;
 						}).join( ',' );
 					}
 				}

js/controllers/slidenumber.js

@@ -23,7 +23,7 @@ export default class SlideNumber {
 	configure( config, oldConfig ) {
 
 		let slideNumberDisplay = 'none';
-		if( config.slideNumber && !this.Reveal.isPrintingPDF() ) {
+		if( config.slideNumber && !this.Reveal.isPrintView() ) {
 			if( config.showSlideNumber === 'all' ) {
 				slideNumberDisplay = 'block';
 			}

js/reveal.js

@@ -1,7 +1,10 @@
 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 ScrollView from './controllers/scrollview.js'
+import PrintView from './controllers/printview.js'
 import Fragments from './controllers/fragments.js'
 import Overview from './controllers/overview.js'
 import Keyboard from './controllers/keyboard.js'
@@ -10,7 +13,6 @@ import Controls from './controllers/controls.js'
 import Progress from './controllers/progress.js'
 import Pointer from './controllers/pointer.js'
 import Plugins from './controllers/plugins.js'
-import Print from './controllers/print.js'
 import Touch from './controllers/touch.js'
 import Focus from './controllers/focus.js'
 import Notes from './controllers/notes.js'
@@ -26,7 +28,7 @@ import {
 } from './utils/constants.js'
 
 // The reveal.js version
-export const VERSION = '4.4.0';
+export const VERSION = '5.0.1';
 
 /**
  * reveal.js
@@ -101,8 +103,11 @@ 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 ),
+		scrollView = new ScrollView( Reveal ),
+		printView = new PrintView( Reveal ),
 		fragments = new Fragments( Reveal ),
 		overview = new Overview( Reveal ),
 		keyboard = new Keyboard( Reveal ),
@@ -111,7 +116,6 @@ export default function( revealElement, options ) {
 		progress = new Progress( Reveal ),
 		pointer = new Pointer( Reveal ),
 		plugins = new Plugins( Reveal ),
-		print = new Print( Reveal ),
 		focus = new Focus( Reveal ),
 		touch = new Touch( Reveal ),
 		notes = new Notes( Reveal );
@@ -138,6 +142,11 @@ export default function( revealElement, options ) {
 		// 5. Query params
 		config = { ...defaultConfig, ...config, ...options, ...initOptions, ...Util.getQueryHash() };
 
+		// Legacy support for the ?print-pdf query
+		if( /print-pdf/gi.test( window.location.search ) ) {
+			config.view = 'print';
+		}
+
 		setViewport();
 
 		// Force a layout when the whole page, incl fonts, has loaded
@@ -199,12 +208,15 @@ export default function( revealElement, options ) {
 		// Updates the presentation to match the current configuration values
 		configure();
 
-		// Read the initial hash
-		location.readURL();
-
 		// Create slide backgrounds
 		backgrounds.update( true );
 
+		// Activate the print/scroll view if configured
+		activateInitialView();
+
+		// Read the initial hash
+		location.readURL();
+
 		// Notify listeners that the presentation is ready but use a 1ms
 		// timeout to ensure it's not fired synchronously after #initialize()
 		setTimeout( () => {
@@ -223,19 +235,41 @@ export default function( revealElement, options ) {
 			});
 		}, 1 );
 
-		// Special setup and config is required when printing to PDF
-		if( print.isPrintingPDF() ) {
-			removeEventListeners();
+	}
 
+	/**
+	 * Activates the correct reveal.js view based on our config.
+	 * This is only invoked once during initialization.
+	 */
+	function activateInitialView() {
+
+		const activatePrintView = config.view === 'print';
+		const activateScrollView = config.view === 'scroll' || config.view === 'reader';
+
+		if( activatePrintView || activateScrollView ) {
+
+			if( activatePrintView ) {
+				removeEventListeners();
+			}
+			else {
+				touch.unbind();
+			}
+
+			// Avoid content flickering during layout
+			dom.viewport.classList.add( 'loading-scroll-mode' );
+
+			if( activatePrintView ) {
 				// The document needs to have loaded for the PDF layout
 				// measurements to be accurate
 				if( document.readyState === 'complete' ) {
-				print.setupPDF();
+					printView.activate();
 				}
 				else {
-				window.addEventListener( 'load', () => {
-					print.setupPDF();
-				} );
+					window.addEventListener( 'load', () => printView.activate() );
+				}
+			}
+			else {
+				scrollView.activate();
 			}
 		}
 
@@ -253,7 +287,18 @@ export default function( revealElement, options ) {
 
 		if( !config.showHiddenSlides ) {
 			Util.queryAll( dom.wrapper, 'section[data-visibility="hidden"]' ).forEach( slide => {
-				slide.parentNode.removeChild( slide );
+				const parent = slide.parentNode;
+
+				// If this slide is part of a stack and that stack will be
+				// empty after removing the hidden slide, remove the entire
+				// stack
+				if( parent.childElementCount === 1 && /section/i.test( parent.nodeName ) ) {
+					parent.remove();
+				}
+				else {
+					slide.remove();
+				}
+
 			} );
 		}
 
@@ -278,6 +323,7 @@ export default function( revealElement, options ) {
 
 		backgrounds.render();
 		slideNumber.render();
+		jumpToSlide.render();
 		controls.render();
 		progress.render();
 		notes.render();
@@ -371,7 +417,7 @@ export default function( revealElement, options ) {
 	function setupScrollPrevention() {
 
 		setInterval( () => {
-			if( dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {
+			if( !scrollView.isActive() && dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {
 				dom.wrapper.scrollTop = 0;
 				dom.wrapper.scrollLeft = 0;
 			}
@@ -438,8 +484,8 @@ export default function( revealElement, options ) {
 		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' );
+		dom.viewport.style.setProperty( '--slide-width', typeof config.width === 'string' ? config.width :  config.width + 'px' );
+		dom.viewport.style.setProperty( '--slide-height', typeof config.height === 'string' ? config.height :  config.height + 'px' );
 
 		if( config.shuffle ) {
 			shuffle();
@@ -571,6 +617,7 @@ export default function( revealElement, options ) {
 		progress.destroy();
 		backgrounds.destroy();
 		slideNumber.destroy();
+		jumpToSlide.destroy();
 
 		// Remove event listeners
 		document.removeEventListener( 'fullscreenchange', onFullscreenChange );
@@ -674,6 +721,26 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Dispatches a slidechanged event.
+	 *
+	 * @param {string} origin Used to identify multiplex clients
+	 */
+	function dispatchSlideChanged( origin ) {
+
+		dispatchEvent({
+			type: 'slidechanged',
+			data: {
+				indexh,
+				indexv,
+				previousSlide,
+				currentSlide,
+				origin
+			}
+		});
+
+	}
+
 	/**
 	 * Dispatched a postMessage of the given type from our window.
 	 */
@@ -857,7 +924,10 @@ export default function( revealElement, options ) {
 	 */
 	function layout() {
 
-		if( dom.wrapper && !print.isPrintingPDF() ) {
+		if( dom.wrapper && !printView.isActive() ) {
+
+			const viewportWidth = dom.viewport.offsetWidth;
+			const viewportHeight = dom.viewport.offsetHeight;
 
 			if( !config.disableLayout ) {
 
@@ -871,7 +941,9 @@ export default function( revealElement, options ) {
 					document.documentElement.style.setProperty( '--vh', ( window.innerHeight * 0.01 ) + 'px' );
 				}
 
-				const size = getComputedSlideSize();
+				const size = scrollView.isActive() ?
+							 getComputedSlideSize( viewportWidth, viewportHeight ) :
+							 getComputedSlideSize();
 
 				const oldScale = scale;
 
@@ -888,8 +960,9 @@ export default function( revealElement, options ) {
 				scale = Math.max( scale, config.minScale );
 				scale = Math.min( scale, config.maxScale );
 
-				// Don't apply any scaling styles if scale is 1
-				if( scale === 1 ) {
+				// Don't apply any scaling styles if scale is 1 or we're
+				// in the scroll view
+				if( scale === 1 || scrollView.isActive() ) {
 					dom.slides.style.zoom = '';
 					dom.slides.style.left = '';
 					dom.slides.style.top = '';
@@ -917,7 +990,7 @@ export default function( revealElement, options ) {
 						continue;
 					}
 
-					if( config.center || slide.classList.contains( 'center' ) ) {
+					if( ( config.center || slide.classList.contains( 'center' ) ) ) {
 						// Vertical stacks are not centred since their section
 						// children will be
 						if( slide.classList.contains( 'stack' ) ) {
@@ -943,9 +1016,25 @@ export default function( revealElement, options ) {
 						}
 					});
 				}
+
+				// Responsively turn on the scroll mode if there is an activation
+				// width configured. Ignore if we're configured to always be in
+				// scroll mode.
+				if( typeof config.scrollActivationWidth === 'number' && config.view !== 'scroll' ) {
+					if( size.presentationWidth > 0 && size.presentationWidth <= config.scrollActivationWidth ) {
+						if( !scrollView.isActive() ) scrollView.activate();
+					}
+					else {
+						if( scrollView.isActive() ) scrollView.deactivate();
+					}
+				}
 			}
 
 			dom.viewport.style.setProperty( '--slide-scale', scale );
+			dom.viewport.style.setProperty( '--viewport-width', viewportWidth + 'px' );
+			dom.viewport.style.setProperty( '--viewport-height', viewportHeight + 'px' );
+
+			scrollView.layout();
 
 			progress.update();
 			backgrounds.updateParallax();
@@ -966,7 +1055,6 @@ export default function( revealElement, options ) {
 	 * @param {string|number} height
 	 */
 	function layoutSlideContents( width, height ) {
-
 		// Handle sizing of elements with the 'r-stretch' class
 		Util.queryAll( dom.slides, 'section > .stretch, section > .r-stretch' ).forEach( element => {
 
@@ -1003,10 +1091,18 @@ export default function( revealElement, options ) {
 	 */
 	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,
@@ -1081,6 +1177,19 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Checks if the current or specified slide is a stack containing
+	 * vertical slides.
+	 *
+	 * @param {HTMLElement} [slide=currentSlide]
+	 * @return {Boolean}
+	 */
+	function isVerticalStack( slide = currentSlide ) {
+
+		return slide.classList.contains( '.stack' ) || slide.querySelector( 'section' ) !== null;
+
+	}
+
 	/**
 	 * Returns true if we're on the last slide in the current
 	 * vertical stack.
@@ -1190,6 +1299,20 @@ 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.
 	 *
@@ -1233,7 +1356,7 @@ export default function( revealElement, options ) {
 	 */
 	function slide( h, v, f, origin ) {
 
-		// Dispatch an event before hte slide
+		// Dispatch an event before the slide
 		const slidechange = dispatchEvent({
 			type: 'beforeslidechange',
 			data: {
@@ -1252,6 +1375,14 @@ export default function( revealElement, options ) {
 		// Query all horizontal slides in the deck
 		const horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
 
+		// If we're in scroll mode, we scroll the target slide into view
+		// instead of running our standard slide transition
+		if( scrollView.isActive() ) {
+			const scrollToSlide = scrollView.getSlideByIndices( h, v );
+			if( scrollToSlide ) scrollView.scrollToSlide( scrollToSlide );
+			return;
+		}
+
 		// Abort if there are no slides
 		if( horizontalSlides.length === 0 ) return;
 
@@ -1298,6 +1429,9 @@ export default function( revealElement, options ) {
 
 		// Detect if we're moving between two auto-animated slides
 		if( slideChanged && previousSlide && currentSlide && !overview.isActive() ) {
+			transition = 'running';
+
+			autoAnimateTransition = shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexvBefore );
 
 			// If this is an auto-animated transition, we disable the
 			// regular slide transition
@@ -1305,16 +1439,9 @@ 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' )
-					&& 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' );
+			if( autoAnimateTransition ) {
+				dom.slides.classList.add( 'disable-slide-transitions' )
 			}
-
-			transition = 'running';
-
 		}
 
 		// Update the visibility of slides now that the indices have changed
@@ -1373,16 +1500,7 @@ export default function( revealElement, options ) {
 		}
 
 		if( slideChanged ) {
-			dispatchEvent({
-				type: 'slidechanged',
-				data: {
-					indexh,
-					indexv,
-					previousSlide,
-					currentSlide,
-					origin
-				}
-			});
+			dispatchSlideChanged( origin );
 		}
 
 		// Handle embedded content
@@ -1427,6 +1545,71 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Checks whether or not an auto-animation should take place between
+	 * the two given slides.
+	 *
+	 * @param {HTMLElement} fromSlide
+	 * @param {HTMLElement} toSlide
+	 * @param {number} indexhBefore
+	 * @param {number} indexvBefore
+	 *
+	 * @returns {boolean}
+	 */
+	function shouldAutoAnimateBetween( fromSlide, toSlide, indexhBefore, indexvBefore ) {
+
+		return 	fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' ) &&
+				fromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) &&
+				!( ( indexh > indexhBefore || indexv > indexvBefore ) ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' );
+
+	}
+
+	/**
+	 * Called anytime a new slide should be activated while in the scroll
+	 * view. The active slide is the page that occupies the most space in
+	 * the scrollable viewport.
+	 *
+	 * @param {number} pageIndex
+	 * @param {HTMLElement} slideElement
+	 */
+	function setCurrentScrollPage( slideElement, h, v ) {
+
+		let indexhBefore = indexh || 0;
+
+		indexh = h;
+		indexv = v;
+
+		const slideChanged = currentSlide !== slideElement;
+
+		previousSlide = currentSlide;
+		currentSlide = slideElement;
+
+		if( currentSlide && previousSlide ) {
+			if( config.autoAnimate && shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexv ) ) {
+				// Run the auto-animation between our slides
+				autoAnimate.run( previousSlide, currentSlide );
+			}
+		}
+
+		// Start or stop embedded content like videos and iframes
+		if( slideChanged ) {
+			if( previousSlide ) {
+				slideContent.stopEmbeddedContent( previousSlide );
+				slideContent.stopEmbeddedContent( previousSlide.slideBackgroundElement );
+			}
+
+			slideContent.startEmbeddedContent( currentSlide );
+			slideContent.startEmbeddedContent( currentSlide.slideBackgroundElement );
+		}
+
+		requestAnimationFrame( () => {
+			announceStatus( getStatusText( currentSlide ) );
+		});
+
+		dispatchSlideChanged();
+
+	}
+
 	/**
 	 * Syncs the presentation with the current DOM. Useful
 	 * when new slides or control elements are added or when
@@ -1453,7 +1636,9 @@ export default function( revealElement, options ) {
 		// Write the current hash to the URL
 		location.writeURL();
 
+		if( config.sortFragmentsOnSync === true ) {
 			fragments.sortAll();
+		}
 
 		controls.update();
 		progress.update();
@@ -1570,7 +1755,7 @@ export default function( revealElement, options ) {
 		let slides = Util.queryAll( dom.wrapper, selector ),
 			slidesLength = slides.length;
 
-		let printMode = print.isPrintingPDF();
+		let printMode = scrollView.isActive() || printView.isActive();
 		let loopedForwards = false;
 		let loopedBackwards = false;
 
@@ -1682,7 +1867,7 @@ export default function( revealElement, options ) {
 	}
 
 	/**
-	 * Shows all fragment elements within the given contaienr.
+	 * Shows all fragment elements within the given container.
 	 */
 	function showFragmentsIn( container ) {
 
@@ -1694,7 +1879,7 @@ export default function( revealElement, options ) {
 	}
 
 	/**
-	 * Hides all fragment elements within the given contaienr.
+	 * Hides all fragment elements within the given container.
 	 */
 	function hideFragmentsIn( container ) {
 
@@ -1730,7 +1915,7 @@ export default function( revealElement, options ) {
 			}
 
 			// All slides need to be visible when exporting to PDF
-			if( print.isPrintingPDF() ) {
+			if( printView.isActive() ) {
 				viewDistance = Number.MAX_VALUE;
 			}
 
@@ -1834,7 +2019,7 @@ 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();
@@ -1961,6 +2146,15 @@ export default function( revealElement, options ) {
 
 		// If a slide is specified, return the indices of that slide
 		if( slide ) {
+			// In scroll mode the original h/x index is stored on the slide
+			if( scrollView.isActive() ) {
+				h = parseInt( slide.getAttribute( 'data-index-h' ), 10 );
+
+				if( slide.getAttribute( 'data-index-v' ) ) {
+					v = parseInt( slide.getAttribute( 'data-index-v' ), 10 );
+				}
+			}
+			else {
 				let isVertical = isVerticalSlide( slide );
 				let slideh = isVertical ? slide.parentNode : slide;
 
@@ -1978,6 +2172,7 @@ export default function( revealElement, options ) {
 					v = Math.max( Util.queryAll( slide.parentNode, 'section' ).indexOf( slide ), 0 );
 				}
 			}
+		}
 
 		if( !slide && currentSlide ) {
 			let hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0;
@@ -2176,11 +2371,7 @@ 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;
@@ -2652,17 +2843,24 @@ export default function( revealElement, options ) {
 		// Toggles the overview mode on/off
 		toggleOverview: overview.toggle.bind( overview ),
 
+		// Toggles the scroll view on/off
+		toggleScrollView: scrollView.toggle.bind( scrollView ),
+
 		// Toggles the "black screen" mode on/off
 		togglePause,
 
 		// Toggles the auto slide mode on/off
 		toggleAutoSlide,
 
+		// Toggles visibility of the jump-to-slide UI
+		toggleJumpToSlide,
+
 		// Slide navigation checks
 		isFirstSlide,
 		isLastSlide,
 		isLastVerticalSlide,
 		isVerticalSlide,
+		isVerticalStack,
 
 		// State checks
 		isPaused,
@@ -2670,7 +2868,9 @@ export default function( revealElement, options ) {
 		isSpeakerNotes: notes.isSpeakerNotesWindow.bind( notes ),
 		isOverview: overview.isActive.bind( overview ),
 		isFocused: focus.isFocused.bind( focus ),
-		isPrintingPDF: print.isPrintingPDF.bind( print ),
+
+		isScrollView: scrollView.isActive.bind( scrollView ),
+		isPrintView: printView.isActive.bind( printView ),
 
 		// Checks if reveal.js has been loaded and is ready for use
 		isReady: () => ready,
@@ -2679,6 +2879,10 @@ 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,
@@ -2739,6 +2943,8 @@ export default function( revealElement, options ) {
 		hasNavigatedHorizontally: () => navigationHistory.hasNavigatedHorizontally,
 		hasNavigatedVertically: () => navigationHistory.hasNavigatedVertically,
 
+		shouldAutoAnimateBetween,
+
 		// Adds/removes a custom key binding
 		addKeyBinding: keyboard.addKeyBinding.bind( keyboard ),
 		removeKeyBinding: keyboard.removeKeyBinding.bind( keyboard ),
@@ -2750,6 +2956,7 @@ export default function( revealElement, options ) {
 		registerKeyboardShortcut: keyboard.registerKeyboardShortcut.bind( keyboard ),
 
 		getComputedSlideSize,
+		setCurrentScrollPage,
 
 		// Returns the current scale of the presentation content
 		getScale: () => scale,
@@ -2786,13 +2993,14 @@ export default function( revealElement, options ) {
 		getStatusText,
 
 		// Controllers
-		print,
 		focus,
+		scroll: scrollView,
 		progress,
 		controls,
 		location,
 		overview,
 		fragments,
+		backgrounds,
 		slideContent,
 		slideNumber,
 

js/utils/util.js

@@ -295,3 +295,19 @@ const fileExtensionToMimeMap = {
 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": "4.4.0",
+  "version": "5.0.2",
   "description": "The HTML Presentation Framework",
   "homepage": "https://revealjs.com",
   "subdomain": "revealjs",
@@ -22,7 +22,7 @@
     "url": "git://github.com/hakimel/reveal.js.git"
   },
   "engines": {
-    "node": ">=10.0.0"
+    "node": ">=18.0.0"
   },
   "keywords": [
     "reveal",
@@ -30,33 +30,37 @@
     "presentation"
   ],
   "devDependencies": {
-    "@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",
+    "@babel/core": "^7.23.2",
+    "@babel/eslint-parser": "^7.22.15",
+    "@babel/preset-env": "^7.23.2",
+    "@rollup/plugin-babel": "^6.0.4",
+    "@rollup/plugin-commonjs": "^25.0.7",
+    "@rollup/plugin-node-resolve": "^15.2.3",
+    "@rollup/plugin-terser": "^0.4.4",
+    "babel-plugin-transform-html-import-to-string": "2.0.0",
     "colors": "^1.4.0",
-    "core-js": "^3.12.1",
-    "fitty": "^2.3.0",
-    "glob": "^7.1.7",
+    "core-js": "^3.33.1",
+    "fitty": "^2.3.7",
+    "glob": "^10.3.10",
     "gulp": "^4.0.2",
     "gulp-autoprefixer": "^8.0.0",
-    "gulp-clean-css": "^4.2.0",
+    "gulp-clean-css": "^4.3.0",
     "gulp-connect": "^5.7.0",
     "gulp-eslint": "^6.0.0",
     "gulp-header": "^2.0.9",
     "gulp-tap": "^2.0.0",
-    "gulp-zip": "^4.2.0",
-    "highlight.js": "^10.0.3",
-    "marked": "^4.0.12",
-    "node-qunit-puppeteer": "^2.1.0",
-    "qunit": "^2.17.2",
-    "rollup": "^2.48.0",
-    "rollup-plugin-terser": "^7.0.2",
-    "sass": "^1.39.2",
-    "yargs": "^15.1.0"
+    "gulp-zip": "^5.1.0",
+    "highlight.js": "^11.9.0",
+    "marked": "^4.3.0",
+    "node-qunit-puppeteer": "^2.1.2",
+    "qunit": "^2.20.0",
+    "rollup": "^4.1.5",
+    "sass": "^1.69.5",
+    "yargs": "^17.7.2"
+  },
+  "overrides": {
+    "chokidar": "3.5.3",
+    "glob-parent": "6.0.2"
   },
   "browserslist": "> 2%, not dead",
   "eslintConfig": {

plugin/markdown/plugin.js

@@ -7,13 +7,16 @@
 import { marked } from 'marked';
 
 const DEFAULT_SLIDE_SEPARATOR = '\r?\n---\r?\n',
-	  DEFAULT_NOTES_SEPARATOR = 'notes?:',
+	  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;',
@@ -35,22 +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;
@@ -65,11 +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
@@ -92,10 +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;
@@ -109,7 +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>';
@@ -131,10 +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,
@@ -143,7 +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] );
@@ -172,10 +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 +'>';
@@ -204,7 +209,7 @@ const Plugin = () => {
 
 		return new Promise( function( resolve ) {
 
-			var externalPromises = [];
+			const externalPromises = [];
 
 			[].slice.call( scope.querySelectorAll( 'section[data-markdown]:not([data-markdown-parsed])') ).forEach( function( section, i ) {
 
@@ -257,13 +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 );
 			}
 
@@ -308,17 +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 {
@@ -336,34 +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 );
 			}
 		}
@@ -375,14 +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' ) ||
@@ -429,14 +434,23 @@ const Plugin = () => {
 				renderer.code = ( code, language ) => {
 
 					// Off by default
+					let lineNumberOffset = '';
 					let lineNumbers = '';
 
 					// 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 ) ) {
-						lineNumbers = language.match( CODE_LINE_NUMBER_REGEX )[1].trim();
+						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();
 					}
@@ -446,7 +460,9 @@ const Plugin = () => {
 					// highlight.js is able to read it
 					code = escapeForHTML( code );
 
-					return `<pre><code ${lineNumbers} class="${language}">${code}</code></pre>`;
+					// return `<pre><code ${lineNumbers} class="${language}">${code}</code></pre>`;
+
+					return `<pre><code ${lineNumbers} ${lineNumberOffset} class="${language}">${code}</code></pre>`;
 				};
 			}
 

plugin/math/math.esm.js

@@ -3,4 +3,4 @@ const t=()=>{let t,e={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(",
  * 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;
+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{a as default};

plugin/notes/plugin.js

@@ -146,8 +146,12 @@ const Plugin = () => {
 		}
 
 		// Look for notes defined in an aside element
-		if( notesElements ) {
-			messageData.notes = Array.from(notesElements).map( notesElement => notesElement.innerHTML ).join( '\n' );
+		if( notesElements && notesElements.length ) {
+			// Ignore notes inside of fragments since those are shown
+			// individually when stepping through fragments
+			notesElements = Array.from( notesElements ).filter( notesElement => notesElement.closest( '.fragment' ) === null );
+
+			messageData.notes = notesElements.map( notesElement => notesElement.innerHTML ).join( '\n' );
 			messageData.markdown = notesElements[0] && typeof notesElements[0].getAttribute( 'data-markdown' ) === 'string';
 		}
 

plugin/notes/speaker-view.html

@@ -533,8 +533,8 @@
 
 					var urlSeparator = /\?/.test(data.url) ? '&' : '?';
 					var hash = '#/' + data.state.indexh + '/' + data.state.indexv;
-					var currentURL = data.url + urlSeparator + params + '&postMessageEvents=true' + hash;
-					var upcomingURL = data.url + urlSeparator + params + '&controls=false' + hash;
+					var currentURL = data.url + urlSeparator + params + '&scrollActivationWidth=false&postMessageEvents=true' + hash;
+					var upcomingURL = data.url + urlSeparator + params + '&scrollActivationWidth=false&controls=false' + hash;
 
 					currentSlide = document.createElement( 'iframe' );
 					currentSlide.setAttribute( 'width', 1280 );

plugin/search/search.esm.js

@@ -4,4 +4,4 @@
  *
  * @author Jon Snyder <snyder.jon@gmail.com>, February 2013
  */
-export default()=>{let e,t,n,l,i,o,r;function s(){t=document.createElement("div"),t.classList.add("searchbox"),t.style.position="absolute",t.style.top="10px",t.style.right="10px",t.style.zIndex=10,t.innerHTML='<input type="search" class="searchinput" placeholder="Search..." style="vertical-align: top;"/>\n\t\t</span>',n=t.querySelector(".searchinput"),n.style.width="240px",n.style.fontSize="14px",n.style.padding="4px 6px",n.style.color="#000",n.style.background="#fff",n.style.borderRadius="2px",n.style.border="0",n.style.outline="0",n.style.boxShadow="0 2px 18px rgba(0, 0, 0, 0.2)",n.style["-webkit-appearance"]="none",e.getRevealElement().appendChild(t),n.addEventListener("keyup",(function(t){switch(t.keyCode){case 13:t.preventDefault(),function(){if(o){var t=n.value;""===t?(r&&r.remove(),l=null):(r=new c("slidecontent"),l=r.apply(t),i=0)}l&&(l.length&&l.length<=i&&(i=0),l.length>i&&(e.slide(l[i].h,l[i].v),i++))}(),o=!1;break;default:o=!0}}),!1),d()}function a(){t||s(),t.style.display="inline",n.focus(),n.select()}function d(){t||s(),t.style.display="none",r&&r.remove()}function c(t,n){var l=document.getElementById(t)||document.body,i=n||"EM",o=new RegExp("^(?:"+i+"|SCRIPT|FORM)$"),r=["#ff6","#a0ffff","#9f9","#f99","#f6f"],s=[],a=0,d="",c=[];this.setRegex=function(e){e=e.replace(/^[^\w]+|[^\w]+$/g,"").replace(/[^\w'-]+/g,"|"),d=new RegExp("("+e+")","i")},this.getRegex=function(){return d.toString().replace(/^\/\\b\(|\)\\b\/i$/g,"").replace(/\|/g," ")},this.hiliteWords=function(t){if(null!=t&&t&&d&&!o.test(t.nodeName)){if(t.hasChildNodes())for(var n=0;n<t.childNodes.length;n++)this.hiliteWords(t.childNodes[n]);var l,p;if(3==t.nodeType)if((l=t.nodeValue)&&(p=d.exec(l))){for(var u=t;null!=u&&"SECTION"!=u.nodeName;)u=u.parentNode;var h=e.getIndices(u),f=c.length,y=!1;for(n=0;n<f;n++)c[n].h===h.h&&c[n].v===h.v&&(y=!0);y||c.push(h),s[p[0].toLowerCase()]||(s[p[0].toLowerCase()]=r[a++%r.length]);var g=document.createElement(i);g.appendChild(document.createTextNode(p[0])),g.style.backgroundColor=s[p[0].toLowerCase()],g.style.fontStyle="inherit",g.style.color="#000";var v=t.splitText(p.index);v.nodeValue=v.nodeValue.substring(p[0].length),t.parentNode.insertBefore(g,v)}}},this.remove=function(){for(var e,t=document.getElementsByTagName(i);t.length&&(e=t[0]);)e.parentNode.replaceChild(e.firstChild,e)},this.apply=function(e){if(null!=e&&e)return this.remove(),this.setRegex(e),this.hiliteWords(l),c}}return{id:"search",init:n=>{e=n,e.registerKeyboardShortcut("CTRL + Shift + F","Search"),document.addEventListener("keydown",(function(e){"F"==e.key&&(e.ctrlKey||e.metaKey)&&(e.preventDefault(),t||s(),"inline"!==t.style.display?a():d())}),!1)},open:a}};
+const e=()=>{let e,t,n,l,o,i,r;function s(){t=document.createElement("div"),t.classList.add("searchbox"),t.style.position="absolute",t.style.top="10px",t.style.right="10px",t.style.zIndex=10,t.innerHTML='<input type="search" class="searchinput" placeholder="Search..." style="vertical-align: top;"/>\n\t\t</span>',n=t.querySelector(".searchinput"),n.style.width="240px",n.style.fontSize="14px",n.style.padding="4px 6px",n.style.color="#000",n.style.background="#fff",n.style.borderRadius="2px",n.style.border="0",n.style.outline="0",n.style.boxShadow="0 2px 18px rgba(0, 0, 0, 0.2)",n.style["-webkit-appearance"]="none",e.getRevealElement().appendChild(t),n.addEventListener("keyup",(function(t){if(13===t.keyCode)t.preventDefault(),function(){if(i){var t=n.value;""===t?(r&&r.remove(),l=null):(r=new c("slidecontent"),l=r.apply(t),o=0)}l&&(l.length&&l.length<=o&&(o=0),l.length>o&&(e.slide(l[o].h,l[o].v),o++))}(),i=!1;else i=!0}),!1),d()}function a(){t||s(),t.style.display="inline",n.focus(),n.select()}function d(){t||s(),t.style.display="none",r&&r.remove()}function c(t,n){var l=document.getElementById(t)||document.body,o=n||"EM",i=new RegExp("^(?:"+o+"|SCRIPT|FORM)$"),r=["#ff6","#a0ffff","#9f9","#f99","#f6f"],s=[],a=0,d="",c=[];this.setRegex=function(e){e=e.replace(/^[^\w]+|[^\w]+$/g,"").replace(/[^\w'-]+/g,"|"),d=new RegExp("("+e+")","i")},this.getRegex=function(){return d.toString().replace(/^\/\\b\(|\)\\b\/i$/g,"").replace(/\|/g," ")},this.hiliteWords=function(t){if(null!=t&&t&&d&&!i.test(t.nodeName)){if(t.hasChildNodes())for(var n=0;n<t.childNodes.length;n++)this.hiliteWords(t.childNodes[n]);var l,p;if(3==t.nodeType)if((l=t.nodeValue)&&(p=d.exec(l))){for(var u=t;null!=u&&"SECTION"!=u.nodeName;)u=u.parentNode;var h=e.getIndices(u),f=c.length,y=!1;for(n=0;n<f;n++)c[n].h===h.h&&c[n].v===h.v&&(y=!0);y||c.push(h),s[p[0].toLowerCase()]||(s[p[0].toLowerCase()]=r[a++%r.length]);var g=document.createElement(o);g.appendChild(document.createTextNode(p[0])),g.style.backgroundColor=s[p[0].toLowerCase()],g.style.fontStyle="inherit",g.style.color="#000";var v=t.splitText(p.index);v.nodeValue=v.nodeValue.substring(p[0].length),t.parentNode.insertBefore(g,v)}}},this.remove=function(){for(var e,t=document.getElementsByTagName(o);t.length&&(e=t[0]);)e.parentNode.replaceChild(e.firstChild,e)},this.apply=function(e){if(null!=e&&e)return this.remove(),this.setRegex(e),this.hiliteWords(l),c}}return{id:"search",init:n=>{e=n,e.registerKeyboardShortcut("CTRL + Shift + F","Search"),document.addEventListener("keydown",(function(e){"F"==e.key&&(e.ctrlKey||e.metaKey)&&(e.preventDefault(),t||s(),"inline"!==t.style.display?a():d())}),!1)},open:a}};export{e as default};

plugin/search/search.js

@@ -4,4 +4,4 @@
 	 * by navigatating to that slide and highlighting it.
 	 *
 	 * @author Jon Snyder <snyder.jon@gmail.com>, February 2013
-	 */return()=>{let e,t,n,l,o,i,r;function s(){t=document.createElement("div"),t.classList.add("searchbox"),t.style.position="absolute",t.style.top="10px",t.style.right="10px",t.style.zIndex=10,t.innerHTML='<input type="search" class="searchinput" placeholder="Search..." style="vertical-align: top;"/>\n\t\t</span>',n=t.querySelector(".searchinput"),n.style.width="240px",n.style.fontSize="14px",n.style.padding="4px 6px",n.style.color="#000",n.style.background="#fff",n.style.borderRadius="2px",n.style.border="0",n.style.outline="0",n.style.boxShadow="0 2px 18px rgba(0, 0, 0, 0.2)",n.style["-webkit-appearance"]="none",e.getRevealElement().appendChild(t),n.addEventListener("keyup",(function(t){switch(t.keyCode){case 13:t.preventDefault(),function(){if(i){var t=n.value;""===t?(r&&r.remove(),l=null):(r=new c("slidecontent"),l=r.apply(t),o=0)}l&&(l.length&&l.length<=o&&(o=0),l.length>o&&(e.slide(l[o].h,l[o].v),o++))}(),i=!1;break;default:i=!0}}),!1),d()}function a(){t||s(),t.style.display="inline",n.focus(),n.select()}function d(){t||s(),t.style.display="none",r&&r.remove()}function c(t,n){var l=document.getElementById(t)||document.body,o=n||"EM",i=new RegExp("^(?:"+o+"|SCRIPT|FORM)$"),r=["#ff6","#a0ffff","#9f9","#f99","#f6f"],s=[],a=0,d="",c=[];this.setRegex=function(e){e=e.replace(/^[^\w]+|[^\w]+$/g,"").replace(/[^\w'-]+/g,"|"),d=new RegExp("("+e+")","i")},this.getRegex=function(){return d.toString().replace(/^\/\\b\(|\)\\b\/i$/g,"").replace(/\|/g," ")},this.hiliteWords=function(t){if(null!=t&&t&&d&&!i.test(t.nodeName)){if(t.hasChildNodes())for(var n=0;n<t.childNodes.length;n++)this.hiliteWords(t.childNodes[n]);var l,f;if(3==t.nodeType)if((l=t.nodeValue)&&(f=d.exec(l))){for(var u=t;null!=u&&"SECTION"!=u.nodeName;)u=u.parentNode;var p=e.getIndices(u),h=c.length,y=!1;for(n=0;n<h;n++)c[n].h===p.h&&c[n].v===p.v&&(y=!0);y||c.push(p),s[f[0].toLowerCase()]||(s[f[0].toLowerCase()]=r[a++%r.length]);var g=document.createElement(o);g.appendChild(document.createTextNode(f[0])),g.style.backgroundColor=s[f[0].toLowerCase()],g.style.fontStyle="inherit",g.style.color="#000";var v=t.splitText(f.index);v.nodeValue=v.nodeValue.substring(f[0].length),t.parentNode.insertBefore(g,v)}}},this.remove=function(){for(var e,t=document.getElementsByTagName(o);t.length&&(e=t[0]);)e.parentNode.replaceChild(e.firstChild,e)},this.apply=function(e){if(null!=e&&e)return this.remove(),this.setRegex(e),this.hiliteWords(l),c}}return{id:"search",init:n=>{e=n,e.registerKeyboardShortcut("CTRL + Shift + F","Search"),document.addEventListener("keydown",(function(e){"F"==e.key&&(e.ctrlKey||e.metaKey)&&(e.preventDefault(),t||s(),"inline"!==t.style.display?a():d())}),!1)},open:a}}}));
+	 */return()=>{let e,t,n,l,o,i,r;function s(){t=document.createElement("div"),t.classList.add("searchbox"),t.style.position="absolute",t.style.top="10px",t.style.right="10px",t.style.zIndex=10,t.innerHTML='<input type="search" class="searchinput" placeholder="Search..." style="vertical-align: top;"/>\n\t\t</span>',n=t.querySelector(".searchinput"),n.style.width="240px",n.style.fontSize="14px",n.style.padding="4px 6px",n.style.color="#000",n.style.background="#fff",n.style.borderRadius="2px",n.style.border="0",n.style.outline="0",n.style.boxShadow="0 2px 18px rgba(0, 0, 0, 0.2)",n.style["-webkit-appearance"]="none",e.getRevealElement().appendChild(t),n.addEventListener("keyup",(function(t){if(13===t.keyCode)t.preventDefault(),function(){if(i){var t=n.value;""===t?(r&&r.remove(),l=null):(r=new c("slidecontent"),l=r.apply(t),o=0)}l&&(l.length&&l.length<=o&&(o=0),l.length>o&&(e.slide(l[o].h,l[o].v),o++))}(),i=!1;else i=!0}),!1),d()}function a(){t||s(),t.style.display="inline",n.focus(),n.select()}function d(){t||s(),t.style.display="none",r&&r.remove()}function c(t,n){var l=document.getElementById(t)||document.body,o=n||"EM",i=new RegExp("^(?:"+o+"|SCRIPT|FORM)$"),r=["#ff6","#a0ffff","#9f9","#f99","#f6f"],s=[],a=0,d="",c=[];this.setRegex=function(e){e=e.replace(/^[^\w]+|[^\w]+$/g,"").replace(/[^\w'-]+/g,"|"),d=new RegExp("("+e+")","i")},this.getRegex=function(){return d.toString().replace(/^\/\\b\(|\)\\b\/i$/g,"").replace(/\|/g," ")},this.hiliteWords=function(t){if(null!=t&&t&&d&&!i.test(t.nodeName)){if(t.hasChildNodes())for(var n=0;n<t.childNodes.length;n++)this.hiliteWords(t.childNodes[n]);var l,f;if(3==t.nodeType)if((l=t.nodeValue)&&(f=d.exec(l))){for(var p=t;null!=p&&"SECTION"!=p.nodeName;)p=p.parentNode;var u=e.getIndices(p),h=c.length,y=!1;for(n=0;n<h;n++)c[n].h===u.h&&c[n].v===u.v&&(y=!0);y||c.push(u),s[f[0].toLowerCase()]||(s[f[0].toLowerCase()]=r[a++%r.length]);var g=document.createElement(o);g.appendChild(document.createTextNode(f[0])),g.style.backgroundColor=s[f[0].toLowerCase()],g.style.fontStyle="inherit",g.style.color="#000";var v=t.splitText(f.index);v.nodeValue=v.nodeValue.substring(f[0].length),t.parentNode.insertBefore(g,v)}}},this.remove=function(){for(var e,t=document.getElementsByTagName(o);t.length&&(e=t[0]);)e.parentNode.replaceChild(e.firstChild,e)},this.apply=function(e){if(null!=e&&e)return this.remove(),this.setRegex(e),this.hiliteWords(l),c}}return{id:"search",init:n=>{e=n,e.registerKeyboardShortcut("CTRL + Shift + F","Search"),document.addEventListener("keydown",(function(e){"F"==e.key&&(e.ctrlKey||e.metaKey)&&(e.preventDefault(),t||s(),"inline"!==t.style.display?a():d())}),!1)},open:a}}}));

plugin/zoom/zoom.esm.js

@@ -1,11 +1,11 @@
 /*!
  * reveal.js Zoom plugin
  */
-const e={id:"zoom",init:function(e){e.getRevealElement().addEventListener("mousedown",(function(o){var n=/Linux/.test(window.navigator.platform)?"ctrl":"alt",i=(e.getConfig().zoomKey?e.getConfig().zoomKey:n)+"Key",d=e.getConfig().zoomLevel?e.getConfig().zoomLevel:2;o[i]&&!e.isOverview()&&(o.preventDefault(),t.to({x:o.clientX,y:o.clientY,scale:d,pan:!1}))}))},destroy:()=>{t.reset()}};var t=function(){var e=1,o=0,n=0,i=-1,d=-1,l="transform"in document.body.style;function s(t,o){var n=r();if(t.width=t.width||1,t.height=t.height||1,t.x-=(window.innerWidth-t.width*o)/2,t.y-=(window.innerHeight-t.height*o)/2,l)if(1===o)document.body.style.transform="";else{var i=n.x+"px "+n.y+"px",d="translate("+-t.x+"px,"+-t.y+"px) scale("+o+")";document.body.style.transformOrigin=i,document.body.style.transform=d}else 1===o?(document.body.style.position="",document.body.style.left="",document.body.style.top="",document.body.style.width="",document.body.style.height="",document.body.style.zoom=""):(document.body.style.position="relative",document.body.style.left=-(n.x+t.x)/o+"px",document.body.style.top=-(n.y+t.y)/o+"px",document.body.style.width=100*o+"%",document.body.style.height=100*o+"%",document.body.style.zoom=o);e=o,document.documentElement.classList&&(1!==e?document.documentElement.classList.add("zoomed"):document.documentElement.classList.remove("zoomed"))}function c(){var t=.12*window.innerWidth,i=.12*window.innerHeight,d=r();n<i?window.scroll(d.x,d.y-14/e*(1-n/i)):n>window.innerHeight-i&&window.scroll(d.x,d.y+(1-(window.innerHeight-n)/i)*(14/e)),o<t?window.scroll(d.x-14/e*(1-o/t),d.y):o>window.innerWidth-t&&window.scroll(d.x+(1-(window.innerWidth-o)/t)*(14/e),d.y)}function r(){return{x:void 0!==window.scrollX?window.scrollX:window.pageXOffset,y:void 0!==window.scrollY?window.scrollY:window.pageYOffset}}return l&&(document.body.style.transition="transform 0.8s ease"),document.addEventListener("keyup",(function(o){1!==e&&27===o.keyCode&&t.out()})),document.addEventListener("mousemove",(function(t){1!==e&&(o=t.clientX,n=t.clientY)})),{to:function(o){if(1!==e)t.out();else{if(o.x=o.x||0,o.y=o.y||0,o.element){var n=o.element.getBoundingClientRect();o.x=n.left-20,o.y=n.top-20,o.width=n.width+40,o.height=n.height+40}void 0!==o.width&&void 0!==o.height&&(o.scale=Math.max(Math.min(window.innerWidth/o.width,window.innerHeight/o.height),1)),o.scale>1&&(o.x*=o.scale,o.y*=o.scale,s(o,o.scale),!1!==o.pan&&(i=setTimeout((function(){d=setInterval(c,1e3/60)}),800)))}},out:function(){clearTimeout(i),clearInterval(d),s({x:0,y:0},1),e=1},magnify:function(e){this.to(e)},reset:function(){this.out()},zoomLevel:function(){return e}}}();
+const e={id:"zoom",init:function(e){e.getRevealElement().addEventListener("mousedown",(function(t){var n=/Linux/.test(window.navigator.platform)?"ctrl":"alt",i=(e.getConfig().zoomKey?e.getConfig().zoomKey:n)+"Key",d=e.getConfig().zoomLevel?e.getConfig().zoomLevel:2;t[i]&&!e.isOverview()&&(t.preventDefault(),o.to({x:t.clientX,y:t.clientY,scale:d,pan:!1}))}))},destroy:()=>{o.reset()}};var t=()=>e,o=function(){var e=1,t=0,n=0,i=-1,d=-1,l="transform"in document.body.style;function s(t,o){var n=r();if(t.width=t.width||1,t.height=t.height||1,t.x-=(window.innerWidth-t.width*o)/2,t.y-=(window.innerHeight-t.height*o)/2,l)if(1===o)document.body.style.transform="";else{var i=n.x+"px "+n.y+"px",d="translate("+-t.x+"px,"+-t.y+"px) scale("+o+")";document.body.style.transformOrigin=i,document.body.style.transform=d}else 1===o?(document.body.style.position="",document.body.style.left="",document.body.style.top="",document.body.style.width="",document.body.style.height="",document.body.style.zoom=""):(document.body.style.position="relative",document.body.style.left=-(n.x+t.x)/o+"px",document.body.style.top=-(n.y+t.y)/o+"px",document.body.style.width=100*o+"%",document.body.style.height=100*o+"%",document.body.style.zoom=o);e=o,document.documentElement.classList&&(1!==e?document.documentElement.classList.add("zoomed"):document.documentElement.classList.remove("zoomed"))}function c(){var o=.12*window.innerWidth,i=.12*window.innerHeight,d=r();n<i?window.scroll(d.x,d.y-14/e*(1-n/i)):n>window.innerHeight-i&&window.scroll(d.x,d.y+(1-(window.innerHeight-n)/i)*(14/e)),t<o?window.scroll(d.x-14/e*(1-t/o),d.y):t>window.innerWidth-o&&window.scroll(d.x+(1-(window.innerWidth-t)/o)*(14/e),d.y)}function r(){return{x:void 0!==window.scrollX?window.scrollX:window.pageXOffset,y:void 0!==window.scrollY?window.scrollY:window.pageYOffset}}return l&&(document.body.style.transition="transform 0.8s ease"),document.addEventListener("keyup",(function(t){1!==e&&27===t.keyCode&&o.out()})),document.addEventListener("mousemove",(function(o){1!==e&&(t=o.clientX,n=o.clientY)})),{to:function(t){if(1!==e)o.out();else{if(t.x=t.x||0,t.y=t.y||0,t.element){var n=t.element.getBoundingClientRect();t.x=n.left-20,t.y=n.top-20,t.width=n.width+40,t.height=n.height+40}void 0!==t.width&&void 0!==t.height&&(t.scale=Math.max(Math.min(window.innerWidth/t.width,window.innerHeight/t.height),1)),t.scale>1&&(t.x*=t.scale,t.y*=t.scale,s(t,t.scale),!1!==t.pan&&(i=setTimeout((function(){d=setInterval(c,1e3/60)}),800)))}},out:function(){clearTimeout(i),clearInterval(d),s({x:0,y:0},1),e=1},magnify:function(e){this.to(e)},reset:function(){this.out()},zoomLevel:function(){return e}}}();
 /*!
  * zoom.js 0.3 (modified for use with reveal.js)
  * http://lab.hakim.se/zoom-js
  * MIT licensed
  *
  * Copyright (C) 2011-2014 Hakim El Hattab, http://hakim.se
- */export default()=>e;
+ */export{t as default};

test/test-auto-animate.html

@@ -65,6 +65,7 @@
 		<script src="../dist/reveal.js"></script>
 		<script>
 
+			QUnit.config.testTimeout = 30000;
 			QUnit.config.reorder = false;
 
 			const slides = Array.prototype.map.call( document.querySelectorAll( '.slides section' ), slide => {

test/test-dependencies-async.html

@@ -31,6 +31,7 @@
 			var	externalScriptSequence = '';
 			var scriptCount = 0;
 
+			QUnit.config.testTimeout = 30000;
 			QUnit.config.autostart = false;
 			QUnit.module( 'Async Dependencies' );
 

test/test-dependencies.html

@@ -30,6 +30,10 @@
 		<script>
 			window.externalScriptSequence = '';
 
+			QUnit.config.testTimeout = 30000;
+			QUnit.config.autostart = false;
+			QUnit.module( 'Dependencies' );
+
 			Reveal.initialize({
 				dependencies: [
 					{ src: 'assets/external-script-a.js' },
@@ -38,7 +42,7 @@
 				]
 			}).then( () => {
 
-				QUnit.module( 'Dependencies' );
+				QUnit.start();
 
 				QUnit.test( 'Load synchronous scripts', function( assert ) {
 					assert.strictEqual( window.externalScriptSequence, 'ABC', 'Loaded and executed in order' );

test/test-grid-navigation.html

@@ -40,9 +40,13 @@
 
 		<script src="../dist/reveal.js"></script>
 		<script>
+			QUnit.config.testTimeout = 30000;
+			QUnit.config.autostart = false;
+			QUnit.module( 'Grid Navigation' );
+
 			Reveal.initialize().then( () => {
 
-				QUnit.module( 'Grid Navigation' );
+				QUnit.start();
 
 				QUnit.test( 'Disabled', function( assert ) {
 					Reveal.right();

test/test-iframe-backgrounds.html

@@ -34,6 +34,8 @@
 		<script src="../dist/reveal.js"></script>
 		<script>
 
+			QUnit.config.testTimeout = 30000;
+
 			Reveal.initialize({ viewDistance: 3 }).then( () => {
 
 				function getIframe( index ) {

test/test-iframes.html

@@ -34,6 +34,8 @@
 		<script src="../dist/reveal.js"></script>
 		<script>
 
+			QUnit.config.testTimeout = 30000;
+
 			Reveal.initialize({ viewDistance: 2 }).then( () => {
 
 				var defaultIframe = document.querySelector( '.default-iframe' ),

test/test-markdown.html

@@ -274,6 +274,13 @@
 						```
 					</script>
 				</section>
+				<section data-markdown class="with-offset">
+					<script type="text/template">
+						```[123:]
+						code
+						```
+					</script>
+				</section>
 				<section data-markdown class="with-line-highlights-and-lanugage">
 					<script type="text/template">
 						```javascript [1,2,3]
@@ -281,6 +288,20 @@
 						```
 					</script>
 				</section>
+				<section data-markdown class="with-line-highlights-offset-and-lanugage">
+					<script type="text/template">
+						```javascript [456: 3,4,5]
+						code
+						```
+					</script>
+				</section>
+				<section data-markdown class="with-line-offset-and-lanugage">
+					<script type="text/template">
+						```javascript [756:]
+						code
+						```
+					</script>
+				</section>
 				<section data-markdown class="with-code-in-fragment">
 					<script type="text/template">
 					```js
@@ -298,6 +319,8 @@
 			import Markdown from '../plugin/markdown/markdown.esm.js'
 			import Highlight from '../plugin/highlight/highlight.esm.js'
 
+			QUnit.config.testTimeout = 30000;
+
 			let deck1 = new Reveal( document.querySelector( '.deck1' ), { plugins: [ Markdown ] })
 			deck1.addEventListener( 'ready', function() {
 
@@ -458,10 +481,23 @@
 					assert.strictEqual( deck6.getRevealElement().querySelectorAll( '.with-line-highlights .hljs[data-line-numbers="1,2,3"]' ).length, 1 );
 				});
 
+				QUnit.test( '```[234: ] line offset only', function( assert ) {
+					assert.strictEqual( deck6.getRevealElement().querySelectorAll( '.with-offset .hljs[data-ln-start-from="123"]' ).length, 1 );
+				});
+
 				QUnit.test( '```javascript [1,2,3] enables line highlights and sets language', function( assert ) {
 					assert.strictEqual( deck6.getRevealElement().querySelectorAll( '.with-line-highlights-and-lanugage .hljs.javascript[data-line-numbers="1,2,3"]' ).length, 1 );
 				});
 
+				QUnit.test( '```javascript [123: 3,4,5] add line offset and enables line highlights and sets language', function( assert ) {
+					assert.strictEqual( deck6.getRevealElement().querySelectorAll( '.with-line-highlights-offset-and-lanugage .hljs.javascript[data-line-numbers="3,4,5"]' ).length, 1 );
+					assert.strictEqual( deck6.getRevealElement().querySelectorAll( '.with-line-highlights-offset-and-lanugage .hljs.javascript[data-ln-start-from="456"]' ).length, 1 );
+				});
+
+				QUnit.test( '```javascript [756:] add line offset and sets no line highlights and sets language', function( assert ) {
+					assert.strictEqual( deck6.getRevealElement().querySelectorAll( '.with-line-offset-and-lanugage .hljs.javascript[data-ln-start-from="756"]' ).length, 1 );
+				});
+				
 				QUnit.test( '```block should allow custom fragment', function( assert ) {
 					assert.strictEqual( deck6.getRevealElement().querySelectorAll( '.with-code-in-fragment pre.fragment' ).length, 1 );
 				});

test/test-multiple-instances-es5.html

@@ -40,6 +40,7 @@
 		<script src="../plugin/zoom/zoom.js"></script>
 		<script>
 
+			QUnit.config.testTimeout = 30000;
 			QUnit.module( 'Multiple reveal.js instances' );
 
 			let r1 = new Reveal( document.querySelector( '.deck1 .reveal' ), {

test/test-multiple-instances.html

@@ -41,6 +41,7 @@
 			import Reveal from '../dist/reveal.esm.js';
 			import Zoom from '../plugin/zoom/zoom.esm.js';
 
+			QUnit.config.testTimeout = 30000;
 			QUnit.module( 'Multiple reveal.js instances' );
 
 			let r1 = new Reveal( document.querySelector( '.deck1 .reveal' ), {

test/test-pdf.html

@@ -75,8 +75,13 @@
 
 		<script src="../dist/reveal.js"></script>
 		<script>
+			QUnit.config.testTimeout = 30000;
+			QUnit.config.autostart = false;
+
 			Reveal.initialize({ pdf: true }).then( function() {
 
+				QUnit.start();
+
 				// Only one test for now, we're mainly ensuring that there
 				// are no execution errors when running PDF mode
 

test/test-plugins.html

@@ -29,6 +29,7 @@
 		<script src="../dist/reveal.js"></script>
 		<script>
 
+			QUnit.config.testTimeout = 30000;
 			QUnit.module( 'Plugins' );
 
 			var initCounter = { PluginB: 0, PluginC: 0, PluginD: 0 };

test/test-scroll.html

@@ -0,0 +1,115 @@
+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - Test Scroll View</title>
+
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../node_modules/qunit/qunit/qunit.css">
+		<script src="../node_modules/qunit/qunit/qunit.js"></script>
+	</head>
+
+	<body style="overflow: auto;">
+
+		<div id="qunit"></div>
+		<div id="qunit-fixture"></div>
+
+		<div class="reveal" style="opacity: 0; pointer-events: none;">
+
+			<div class="slides">
+
+				<section>
+					<h1>slide 1</h1>
+				</section>
+
+				<section>
+					<h1>slide 2</h1>
+				</section>
+
+				<section>
+					<h1>slide 3</h1>
+					<p class="fragment">fragment 1</p>
+					<p class="fragment">fragment 2</p>
+					<p class="fragment">fragment 3</p>
+				</section>
+
+				<section>
+					<h1>slide 4</h1>
+				</section>
+
+			</div>
+
+		</div>
+
+		<script src="../dist/reveal.js"></script>
+		<script>
+
+			QUnit.config.testTimeout = 30000;
+			QUnit.config.reorder = false;
+
+			function getScrollHeight() {
+				return Reveal.getViewportElement().scrollHeight;
+			}
+
+			function getViewportHeight() {
+				return Reveal.getViewportElement().offsetHeight;
+			}
+
+			Reveal.initialize({ view: 'scroll' }).then( async () => {
+
+				QUnit.module( 'Scroll View' );
+
+				QUnit.test( 'Activates', assert => {
+					assert.ok( getScrollHeight() > getViewportHeight(), 'Is overflowing' );
+				});
+
+				QUnit.test( 'Can be toggled via API', assert => {
+					Reveal.toggleScrollView( false );
+					assert.ok( getScrollHeight() <= getViewportHeight(), 'Is not overflowing' );
+					Reveal.toggleScrollView( true );
+					assert.ok( getScrollHeight() > getViewportHeight(), 'Is overflowing' );
+				});
+
+				QUnit.test( 'Changes present slide when scrolling', assert => {
+					assert.timeout( 200 );
+					assert.expect( 2 );
+
+					const slides = document.querySelectorAll( '.reveal .slides section' );
+
+					assert.ok( slides[0].classList.contains( 'present' ), 'First slide is present' );
+					Reveal.getViewportElement().scrollTop = getViewportHeight() * 1;
+
+					return new Promise( resolve => {
+						setTimeout(() => {
+							assert.ok( slides[1].classList.contains( 'present' ), 'Second slide is present' );
+							resolve();
+						}, 100);
+					} );
+				});
+
+				QUnit.test( 'Fires slideschanged event when scrolling', assert => {
+					assert.timeout( 200 );
+					assert.expect( 2 );
+
+					const slides = document.querySelectorAll( '.reveal .slides section' );
+
+					return new Promise( resolve => {
+						let callback = ( event ) => {
+								Reveal.off( 'slidechanged', callback );
+								assert.ok( true, 'slidechanged event fired' );
+								assert.ok( event.currentSlide.classList.contains( 'present' ), 'slidechanged provides reference to currentSlide' );
+								resolve();
+							}
+
+							Reveal.on( 'slidechanged', callback );
+							Reveal.getViewportElement().scrollTop = getViewportHeight() * 2;
+					});
+				});
+
+			} );
+		</script>
+
+	</body>
+</html>

test/test-state.html

@@ -39,8 +39,7 @@
 		<script src="../dist/reveal.js"></script>
 		<script>
 
-			Reveal.initialize().then( function() {
-				console.log(Reveal);
+			Reveal.initialize();
 
 			QUnit.module( 'State' );
 
@@ -129,7 +128,6 @@
 				Reveal.off( 'state1', _onEvent );
 			});
 
-			} );
 		</script>
 
 	</body>