update leetcode 20230110.md

leetcode 179 347
2023-01-11 15:22:35 +08:00 · 2023-01-09 10:24:31 +08:00
117 changed files with 14076 additions and 10763 deletions
--- a/.codespellrc
+++ b/.codespellrc
@@ -1,8 +0,0 @@
-[codespell]
-# Ref: https://github.com/codespell-project/codespell#using-a-config-file
-skip = .git*,node_modules,package-lock.json,*.css,.codespellrc
-check-hidden = true
-# Ignore super long lines -- must be minimized etc, acronyms
-# and some near hit variables
-ignore-regex = ^.{120,}|\b(currentY|FOM)\b
-# ignore-words-list =
--- a/.github/workflows/js.yml
+++ b/.github/workflows/js.yml
@@ -0,0 +1,24 @@
+name: tests
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 14.x, 16.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm run build --if-present
+    - run: npm test
+      env:
+        CI: true
--- a/.github/workflows/spellcheck.yml
+++ b/.github/workflows/spellcheck.yml
@@ -1,23 +0,0 @@
-# Codespell configuration is within .codespellrc
---
-name: Spellcheck
-
-on:
-  push:
-    branches: [master]
-  pull_request:
-    branches: [master]
-
-permissions:
-  contents: read
-
-jobs:
-  codespell:
-    name: Check for spelling errors
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Codespell
-        uses: codespell-project/actions-codespell@v2
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,31 +0,0 @@
-name: Tests
-
-on:
-  - push
-
-permissions:
-  contents: read
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        node-version:
-          - 18
-          - 20
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-
-      - run: npm install
-      - run: npm run build --if-present
-      - run: npm test
-        env:
-          CI: true
--- a/.npmignore
+++ b/.npmignore
@@ -1,5 +1,7 @@
 /test
 /examples
 .github
+.gulpfile
 .sass-cache
 gulpfile.js
+CONTRIBUTING.md
--- a/2
+++ b/2
@@ -1,4 +1,4 @@
-Copyright (C) 2011-2024 Hakim El Hattab, http://hakim.se, and reveal.js contributors
+Copyright (C) 2011-2022 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
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
  </a>
  <br><br>
  <a href="https://github.com/hakimel/reveal.js/actions"><img src="https://github.com/hakimel/reveal.js/workflows/tests/badge.svg"></a>
-  <a href="https://slides.com/"><img src="https://static.slid.es/images/slides-github-banner-320x40.png?1" alt="Slides" width="160" height="20"></a>
+  <a href="https://slides.com/"><img src="https://s3.amazonaws.com/static.slid.es/images/slides-github-banner-320x40.png?1" alt="Slides" width="160" height="20"></a>
 </p>

 reveal.js is an open source HTML presentation framework. It enables anyone with a web browser to create beautiful presentations for free. Check out the live demo at [revealjs.com](https://revealjs.com/).
@@ -17,6 +17,26 @@ Want to create reveal.js presentation in a graphical editor? Try <https://slides

 ---

+### Sponsors
+Hakim's open source work is supported by <a href="https://github.com/sponsors/hakimel">GitHub sponsors</a>. Special thanks to:
+<div align="center">
+  <table>
+    <td align="center">
+      <a href="https://workos.com/?utm_campaign=github_repo&utm_medium=referral&utm_content=revealjs&utm_source=github">
+        <div>
+          <img src="https://user-images.githubusercontent.com/629429/151508669-efb4c3b3-8fe3-45eb-8e47-e9510b5f0af1.svg" width="290" alt="WorkOS">
+        </div>
+        <b>Your app, enterprise-ready.</b>
+        <div>
+          <sub>Start selling to enterprise customers with just a few lines of code. Add Single Sign-On (and more) in minutes instead of months.</sup>
+        </div>
+      </a>
+    </td>
+  </table>
+</div>
+
+---
+
 ### Getting started
 - 🚀 [Install reveal.js](https://revealjs.com/installation)
 - 👀 [View the demo presentation](https://revealjs.com/demo)
@@ -26,5 +46,5 @@ Want to create reveal.js presentation in a graphical editor? Try <https://slides

 --- 
 <div align="center">
-  MIT licensed | Copyright © 2011-2024 Hakim El Hattab, https://hakim.se
+  MIT licensed | Copyright © 2011-2022 Hakim El Hattab, https://hakim.se
 </div>
--- a/css/layout.scss
+++ b/css/layout.scss
@@ -25,7 +25,6 @@
 // Stack multiple elements on top of each other
 .reveal .r-stack {
 	display: grid;
-	grid-template-rows: 100%;
 }

 .reveal .r-stack > * {
--- a/css/print/paper.scss
+++ b/css/print/paper.scss
@@ -1,30 +1,42 @@
+/* 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) {
-		overflow: visible;
+
+		background: #fff;
 		width: auto;
 		height: auto;
+		overflow: visible;

 		body {
-			margin: 0;
+			background: #fff;
+			font-size: 20pt;
+			width: auto;
+			height: auto;
+			border: 0;
+			margin: 0 5%;
 			padding: 0;
 			overflow: visible;
+			float: none !important;
 		}
-	}
-
-	html:not(.print-pdf) .reveal {
-		background: #fff;
-		font-size: 20pt;

+		.nestedarrow,
 		.controls,
+		.fork-reveal,
+		.share-reveal,
 		.state-background,
-		.progress,
-		.backgrounds,
-		.slide-number {
+		.reveal .progress,
+		.reveal .backgrounds,
+		.reveal .slide-number {
 			display: none !important;
 		}

-		p, td, li {
+		body, p, td, li {
 			font-size: 20pt!important;
 			color: #000;
 		}
@@ -37,6 +49,7 @@
 			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; }
@@ -61,19 +74,18 @@
 			margin: 0;
 			text-align: left !important;
 		}
-		pre,
-		table {
+		.reveal pre,
+		.reveal table {
 			margin-left: 0;
 			margin-right: 0;
 		}
-		pre code {
+		.reveal pre code {
 			padding: 20px;
 		}
-		blockquote {
+		.reveal blockquote {
 			margin: 20px 0;
 		}
-
-		.slides {
+		.reveal .slides {
 			position: static !important;
 			width: auto !important;
 			height: auto !important;
@@ -94,7 +106,7 @@

 			perspective-origin: 50% 50%;
 		}
-		.slides section {
+		.reveal .slides section {
 			visibility: visible !important;
 			position: static !important;
 			width: auto !important;
@@ -117,24 +129,24 @@
 			transform: none !important;
 			transition: none !important;
 		}
-		.slides section.stack {
+		.reveal .slides section.stack {
 			padding: 0 !important;
 		}
-		.slides section:last-of-type {
+		.reveal section:last-of-type {
 			page-break-after: avoid !important;
 		}
-		.slides section .fragment {
+		.reveal section .fragment {
 			opacity: 1 !important;
 			visibility: visible !important;

 			transform: none !important;
 		}

-		.r-fit-text {
+		.reveal .r-fit-text {
 			white-space: normal !important;
 		}

-		section img {
+		.reveal section img {
 			display: block;
 			margin: 15px 0px;
 			background: rgba(255,255,255,1);
@@ -142,11 +154,11 @@
 			box-shadow: none;
 		}

-		section small {
+		.reveal section small {
 			font-size: 0.8em;
 		}

-		.hljs {
+		.reveal .hljs {
 			max-height: 100%;
 			white-space: pre-wrap;
 			word-wrap: break-word;
@@ -154,11 +166,11 @@
 			font-size: 15pt;
 		}

-		.hljs .hljs-ln-numbers {
+		.reveal .hljs .hljs-ln-numbers {
 			white-space: nowrap;
 		}

-		.hljs td {
+		.reveal .hljs td {
 			font-size: inherit !important;
 			color: inherit !important;
 		}
--- a/css/print/pdf.scss
+++ b/css/print/pdf.scss
@@ -5,7 +5,7 @@
 * https://revealjs.com/pdf-export/
 */

-html.reveal-print {
+html.print-pdf {
 	* {
 		-webkit-print-color-adjust: exact;
 	}
@@ -36,6 +36,7 @@ html.reveal-print {

 	.reveal pre code {
 		overflow: hidden !important;
+		font-family: Courier, 'Courier New', monospace !important;
 	}

 	.reveal {
@@ -70,10 +71,6 @@ html.reveal-print {
 		page-break-after: always;
 	}

-	.reveal .slides .pdf-page:last-of-type {
-		page-break-after: avoid;
-	}
-
 	.reveal .slides section {
 		visibility: visible !important;
 		display: block !important;
@@ -149,7 +146,6 @@ html.reveal-print {
 		display: block;
 		position: absolute;
 		font-size: 14px;
-		visibility: visible;
 	}

 	/* This accessibility tool is not useful in PDF and breaks it visually */
--- a/css/reveal.scss
+++ b/css/reveal.scss
@@ -1,3 +1,5 @@
+@use "sass:math";
+
 /**
 * reveal.js
 * http://revealjs.com
@@ -6,7 +8,6 @@
 * Copyright (C) Hakim El Hattab, https://hakim.se
 */

-@use "sass:math";
@import 'layout';

 /*********************************************
@@ -18,7 +19,6 @@ html.reveal-full-page {
 	height: 100%;
 	height: 100vh;
 	height: calc( var(--vh, 1vh) * 100 );
-	height: 100dvh;
 	overflow: hidden;
 }

@@ -31,18 +31,6 @@ html.reveal-full-page {

 	background-color: #fff;
 	color: #000;
-
-	--r-controls-spacing: 12px;
-	--r-overlay-header-height: 40px;
-	--r-overlay-margin: 0px;
-	--r-overlay-padding: 6px;
-	--r-overlay-gap: 5px;
-}
-
-@media screen and (max-width: 1024px), (max-height: 768px) {
-	.reveal-viewport {
-		--r-overlay-header-height: 26px;
-	}
 }

 // Force the presentation to cover the full viewport when we
@@ -60,14 +48,11 @@ html.reveal-full-page {
 * VIEW FRAGMENTS
 *********************************************/

-.reveal .fragment {
+.reveal .slides section .fragment {
+	opacity: 0;
+	visibility: hidden;
 	transition: all .2s ease;
-
-	&:not(.custom) {
-		opacity: 0;
-		visibility: hidden;
-		will-change: opacity;
-	}
+	will-change: opacity;

 	&.visible {
 		opacity: 1;
@@ -79,7 +64,7 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.grow {
+.reveal .slides section .fragment.grow {
 	opacity: 1;
 	visibility: inherit;

@@ -88,7 +73,7 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.shrink {
+.reveal .slides section .fragment.shrink {
 	opacity: 1;
 	visibility: inherit;

@@ -97,7 +82,7 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.zoom-in {
+.reveal .slides section .fragment.zoom-in {
 	transform: scale( 0.1 );

 	&.visible {
@@ -105,7 +90,7 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.fade-out {
+.reveal .slides section .fragment.fade-out {
 	opacity: 1;
 	visibility: inherit;

@@ -115,7 +100,7 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.semi-fade-out {
+.reveal .slides section .fragment.semi-fade-out {
 	opacity: 1;
 	visibility: inherit;

@@ -125,7 +110,7 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.strike {
+.reveal .slides section .fragment.strike {
 	opacity: 1;
 	visibility: inherit;

@@ -134,7 +119,7 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.fade-up {
+.reveal .slides section .fragment.fade-up {
 	transform: translate(0, 40px);

 	&.visible {
@@ -142,7 +127,7 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.fade-down {
+.reveal .slides section .fragment.fade-down {
 	transform: translate(0, -40px);

 	&.visible {
@@ -150,7 +135,7 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.fade-right {
+.reveal .slides section .fragment.fade-right {
 	transform: translate(-40px, 0);

 	&.visible {
@@ -158,7 +143,7 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.fade-left {
+.reveal .slides section .fragment.fade-left {
 	transform: translate(40px, 0);

 	&.visible {
@@ -166,8 +151,8 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.fade-in-then-out,
-.reveal .fragment.current-visible {
+.reveal .slides section .fragment.fade-in-then-out,
+.reveal .slides section .fragment.current-visible {
 	opacity: 0;
 	visibility: hidden;

@@ -177,7 +162,7 @@ html.reveal-full-page {
 	}
 }

-.reveal .fragment.fade-in-then-semi-out {
+.reveal .slides section .fragment.fade-in-then-semi-out {
 	opacity: 0;
 	visibility: hidden;

@@ -192,32 +177,32 @@ html.reveal-full-page {
 	}
 }

-.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 {
+.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 {
 	opacity: 1;
 	visibility: inherit;
 }
-	.reveal .fragment.highlight-red.visible {
+	.reveal .slides section .fragment.highlight-red.visible {
 		color: #ff2c2d
 	}
-	.reveal .fragment.highlight-green.visible {
+	.reveal .slides section .fragment.highlight-green.visible {
 		color: #17ff2e;
 	}
-	.reveal .fragment.highlight-blue.visible {
+	.reveal .slides section .fragment.highlight-blue.visible {
 		color: #1b91ff;
 	}

-.reveal .fragment.highlight-current-red.current-fragment {
+.reveal .slides section .fragment.highlight-current-red.current-fragment {
 	color: #ff2c2d
 }
-.reveal .fragment.highlight-current-green.current-fragment {
+.reveal .slides section .fragment.highlight-current-green.current-fragment {
 	color: #17ff2e;
 }
-.reveal .fragment.highlight-current-blue.current-fragment {
+.reveal .slides section .fragment.highlight-current-blue.current-fragment {
 	color: #1b91ff;
 }

@@ -283,11 +268,13 @@ $controlsArrowAngleActive: 36deg;
 }

 .reveal .controls {
+	$spacing: 12px;
+
 	display: none;
 	position: absolute;
 	top: auto;
-	bottom: var(--r-controls-spacing);
-	right: var(--r-controls-spacing);
+	bottom: $spacing;
+	right: $spacing;
 	left: auto;
 	z-index: 11;
 	color: #000;
@@ -519,9 +506,7 @@ $controlsArrowAngleActive: 36deg;
 // Edge aligned controls layout
@media screen and (min-width: 500px) {

-	.reveal-viewport {
-		--r-controls-spacing: 0.8em;
-	}
+	$spacing: 0.8em;

 	.reveal .controls[data-controls-layout="edges"] {
 		& {
@@ -541,24 +526,24 @@ $controlsArrowAngleActive: 36deg;

 		.navigate-left {
 			top: 50%;
-			left: var(--r-controls-spacing);
+			left: $spacing;
 			margin-top: -$controlArrowSize*0.5;
 		}

 		.navigate-right {
 			top: 50%;
-			right: var(--r-controls-spacing);
+			right: $spacing;
 			margin-top: -$controlArrowSize*0.5;
 		}

 		.navigate-up {
-			top: var(--r-controls-spacing);
+			top: $spacing;
 			left: 50%;
 			margin-left: -$controlArrowSize*0.5;
 		}

 		.navigate-down {
-			bottom: calc(var(--r-controls-spacing) - #{$controlArrowSpacing} + 0.3em);
+			bottom: $spacing - $controlArrowSpacing + 0.3em;
 			left: 50%;
 			margin-left: -$controlArrowSize*0.5;
 		}
@@ -640,16 +625,11 @@ $controlsArrowAngleActive: 36deg;
 	touch-action: pinch-zoom;
 }

-// Swiping on an embedded deck should not block page scrolling...
+// Swiping on an embedded deck should not block page scrolling
 .reveal.embedded {
 	touch-action: pan-y;
 }

-// ... unless we're on a vertical slide
-.reveal.embedded.is-vertical-slide {
-	touch-action: none;
-}
-
 .reveal .slides {
 	position: absolute;
 	width: 100%;
@@ -1009,7 +989,7 @@ $controlsArrowAngleActive: 36deg;
 		border-radius: 4px;
 		box-shadow: 0px 95px 25px rgba(0,0,0,0.2);

-		transform: translateZ(-90px) rotateX( 65deg );
+		-webkit-transform: translateZ(-90px) rotateX( 65deg );
 	}

 .reveal.page .slides>section.stack {
@@ -1328,6 +1308,12 @@ $controlsArrowAngleActive: 36deg;
 	perspective-origin: 50% 50%;
 	perspective: 700px;

+	.slides {
+		// Fixes overview rendering errors in FF48+, not applied to
+		// other browsers since it degrades performance
+		-moz-transform-style: preserve-3d;
+	}
+
 	.slides section {
 		height: 100%;
 		top: 0 !important;
@@ -1339,12 +1325,9 @@ $controlsArrowAngleActive: 36deg;
 	}
 	.slides section:hover,
 	.slides section.present {
-		outline: 10px solid rgba(150,150,150,0.6);
+		outline: 10px solid rgba(150,150,150,0.4);
 		outline-offset: 10px;
 	}
-	.slides section.present {
-		outline: 10px solid var(--r-link-color);
-	}
 	.slides section .fragment {
 		opacity: 1;
 		transition: none;
@@ -1363,6 +1346,10 @@ $controlsArrowAngleActive: 36deg;

 	.backgrounds {
 		perspective: inherit;
+
+		// Fixes overview rendering errors in FF48+, not applied to
+		// other browsers since it degrades performance
+		-moz-transform-style: preserve-3d;
 	}

 	.backgrounds .slide-background {
@@ -1442,234 +1429,160 @@ $controlsArrowAngleActive: 36deg;
 * OVERLAY FOR LINK PREVIEWS AND HELP
 *********************************************/

-@keyframes fade-in {
-	from { opacity: 0; }
-	to { opacity: 1; }
-}
+$overlayHeaderHeight: 40px;
+$overlayHeaderPadding: 5px;

-@keyframes scale-up {
-	from { transform: scale( 0.95 ); }
-	to { transform: scale( 1 ); }
-}
-
-.reveal [data-preview-image],
-.reveal [data-preview-video],
-.reveal [data-preview-link]:not(a):not([data-preview-link=false]) {
-	cursor: zoom-in;
-}
-
-.r-overlay {
+.reveal > .overlay {
 	position: absolute;
-	top: var(--r-overlay-margin);
-	right: var(--r-overlay-margin);
-	bottom: var(--r-overlay-margin);
-	left: var(--r-overlay-margin);
-	border-radius: min( var(--r-overlay-margin), 6px );
-	z-index: 99;
-	background: rgba( 0, 0, 0, 0.95 );
-	backdrop-filter: blur( 10px );
-	transition: all 0.3s ease;
-	color: #fff;
-	animation: fade-in 0.3s ease;
-	font-family: ui-sans-serif, system-ui, -apple-system, Helvetica, sans-serif;
-}
-
-.r-overlay-viewport {
-	position: absolute;
-	top: var(--r-overlay-padding);
-	right: var(--r-overlay-padding);
-	bottom: var(--r-overlay-padding);
-	left: var(--r-overlay-padding);
-	gap: var(--r-overlay-gap);
-	display: flex;
-	flex-direction: column;
-}
-
-.r-overlay-header {
-	display: flex;
-	z-index: 2;
-	box-sizing: border-box;
-	align-items: center;
-	justify-content: flex-end;
-	height: var(--r-overlay-header-height);
-	gap: 6px;
-}
-.r-overlay-header .r-overlay-button {
-	all: unset;
-	display: flex;
-	align-items: center;
-	justify-content: center;
-	min-width: var(--r-overlay-header-height);
-	min-height: var(--r-overlay-header-height);
-	padding: 0 calc(var(--r-overlay-header-height) / 4);
-	opacity: 1;
-	border-radius: 6px;
-	font-size: 18px;
-	gap: 8px;
-	cursor: pointer;
-
-	box-sizing: border-box;
-}
-.r-overlay-header .r-overlay-button:hover {
-	opacity: 1;
-	background-color: rgba( 255, 255, 255, 0.15 );
-}
-.r-overlay-header .icon {
-	display: inline-block;
-	width: 20px;
-	height: 20px;
-
-	background-position: 50% 50%;
-	background-size: 100%;
-	background-repeat: no-repeat;
-}
-.r-overlay-close .icon {
-	background-image: url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNSIgaGVpZ2h0PSIxNSIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI2ZmZiIgZmlsbC1ydWxlPSJldmVub2RkIiBkPSJNMTIuODU0IDIuODU0YS41LjUgMCAwIDAtLjcwOC0uNzA4TDcuNSA2Ljc5MyAyLjg1NCAyLjE0NmEuNS41IDAgMSAwLS43MDguNzA4TDYuNzkzIDcuNWwtNC42NDcgNC42NDZhLjUuNSAwIDAgMCAuNzA4LjcwOEw3LjUgOC4yMDdsNC42NDYgNC42NDdhLjUuNSAwIDAgMCAuNzA4LS43MDhMOC4yMDcgNy41bDQuNjQ3LTQuNjQ2WiIgY2xpcC1ydWxlPSJldmVub2RkIi8+PC9zdmc+);
-}
-.r-overlay-external .icon {
-	background-image: url(data:image/svg+xml;base64,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);
-}
-
-.r-overlay-content {
-	position: relative;
-	display: grid;
-	place-items: center;
-	border-radius: 6px;
-	overflow: hidden;
-	flex-grow: 1;
-	background-color: rgba(20, 20, 20, 0.8);
-	animation: scale-up 0.5s cubic-bezier(0.260, 0.860, 0.440, 0.985);
-}
-
-.r-overlay-spinner {
-	position: absolute;
-	display: block;
-	top: 50%;
-	left: 50%;
-	width: 32px;
-	height: 32px;
-	margin: -16px 0 0 -16px;
-	z-index: 10;
-	background-image: url(data:image/gif;base64,R0lGODlhIAAgAPMAAJmZmf%2F%2F%2F6%2Bvr8nJybW1tcDAwOjo6Nvb26ioqKOjo7Ozs%2FLy8vz8%2FAAAAAAAAAAAACH%2FC05FVFNDQVBFMi4wAwEAAAAh%2FhpDcmVhdGVkIHdpdGggYWpheGxvYWQuaW5mbwAh%2BQQJCgAAACwAAAAAIAAgAAAE5xDISWlhperN52JLhSSdRgwVo1ICQZRUsiwHpTJT4iowNS8vyW2icCF6k8HMMBkCEDskxTBDAZwuAkkqIfxIQyhBQBFvAQSDITM5VDW6XNE4KagNh6Bgwe60smQUB3d4Rz1ZBApnFASDd0hihh12BkE9kjAJVlycXIg7CQIFA6SlnJ87paqbSKiKoqusnbMdmDC2tXQlkUhziYtyWTxIfy6BE8WJt5YJvpJivxNaGmLHT0VnOgSYf0dZXS7APdpB309RnHOG5gDqXGLDaC457D1zZ%2FV%2FnmOM82XiHRLYKhKP1oZmADdEAAAh%2BQQJCgAAACwAAAAAIAAgAAAE6hDISWlZpOrNp1lGNRSdRpDUolIGw5RUYhhHukqFu8DsrEyqnWThGvAmhVlteBvojpTDDBUEIFwMFBRAmBkSgOrBFZogCASwBDEY%2FCZSg7GSE0gSCjQBMVG023xWBhklAnoEdhQEfyNqMIcKjhRsjEdnezB%2BA4k8gTwJhFuiW4dokXiloUepBAp5qaKpp6%2BHo7aWW54wl7obvEe0kRuoplCGepwSx2jJvqHEmGt6whJpGpfJCHmOoNHKaHx61WiSR92E4lbFoq%2BB6QDtuetcaBPnW6%2BO7wDHpIiK9SaVK5GgV543tzjgGcghAgAh%2BQQJCgAAACwAAAAAIAAgAAAE7hDISSkxpOrN5zFHNWRdhSiVoVLHspRUMoyUakyEe8PTPCATW9A14E0UvuAKMNAZKYUZCiBMuBakSQKG8G2FzUWox2AUtAQFcBKlVQoLgQReZhQlCIJesQXI5B0CBnUMOxMCenoCfTCEWBsJColTMANldx15BGs8B5wlCZ9Po6OJkwmRpnqkqnuSrayqfKmqpLajoiW5HJq7FL1Gr2mMMcKUMIiJgIemy7xZtJsTmsM4xHiKv5KMCXqfyUCJEonXPN2rAOIAmsfB3uPoAK%2B%2BG%2Bw48edZPK%2BM6hLJpQg484enXIdQFSS1u6UhksENEQAAIfkECQoAAAAsAAAAACAAIAAABOcQyEmpGKLqzWcZRVUQnZYg1aBSh2GUVEIQ2aQOE%2BG%2BcD4ntpWkZQj1JIiZIogDFFyHI0UxQwFugMSOFIPJftfVAEoZLBbcLEFhlQiqGp1Vd140AUklUN3eCA51C1EWMzMCezCBBmkxVIVHBWd3HHl9JQOIJSdSnJ0TDKChCwUJjoWMPaGqDKannasMo6WnM562R5YluZRwur0wpgqZE7NKUm%2BFNRPIhjBJxKZteWuIBMN4zRMIVIhffcgojwCF117i4nlLnY5ztRLsnOk%2BaV%2BoJY7V7m76PdkS4trKcdg0Zc0tTcKkRAAAIfkECQoAAAAsAAAAACAAIAAABO4QyEkpKqjqzScpRaVkXZWQEximw1BSCUEIlDohrft6cpKCk5xid5MNJTaAIkekKGQkWyKHkvhKsR7ARmitkAYDYRIbUQRQjWBwJRzChi9CRlBcY1UN4g0%2FVNB0AlcvcAYHRyZPdEQFYV8ccwR5HWxEJ02YmRMLnJ1xCYp0Y5idpQuhopmmC2KgojKasUQDk5BNAwwMOh2RtRq5uQuPZKGIJQIGwAwGf6I0JXMpC8C7kXWDBINFMxS4DKMAWVWAGYsAdNqW5uaRxkSKJOZKaU3tPOBZ4DuK2LATgJhkPJMgTwKCdFjyPHEnKxFCDhEAACH5BAkKAAAALAAAAAAgACAAAATzEMhJaVKp6s2nIkolIJ2WkBShpkVRWqqQrhLSEu9MZJKK9y1ZrqYK9WiClmvoUaF8gIQSNeF1Er4MNFn4SRSDARWroAIETg1iVwuHjYB1kYc1mwruwXKC9gmsJXliGxc%2BXiUCby9ydh1sOSdMkpMTBpaXBzsfhoc5l58Gm5yToAaZhaOUqjkDgCWNHAULCwOLaTmzswadEqggQwgHuQsHIoZCHQMMQgQGubVEcxOPFAcMDAYUA85eWARmfSRQCdcMe0zeP1AAygwLlJtPNAAL19DARdPzBOWSm1brJBi45soRAWQAAkrQIykShQ9wVhHCwCQCACH5BAkKAAAALAAAAAAgACAAAATrEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiRMDjI0Fd30%2FiI2UA5GSS5UDj2l6NoqgOgN4gksEBgYFf0FDqKgHnyZ9OX8HrgYHdHpcHQULXAS2qKpENRg7eAMLC7kTBaixUYFkKAzWAAnLC7FLVxLWDBLKCwaKTULgEwbLA4hJtOkSBNqITT3xEgfLpBtzE%2FjiuL04RGEBgwWhShRgQExHBAAh%2BQQJCgAAACwAAAAAIAAgAAAE7xDISWlSqerNpyJKhWRdlSAVoVLCWk6JKlAqAavhO9UkUHsqlE6CwO1cRdCQ8iEIfzFVTzLdRAmZX3I2SfZiCqGk5dTESJeaOAlClzsJsqwiJwiqnFrb2nS9kmIcgEsjQydLiIlHehhpejaIjzh9eomSjZR%2BipslWIRLAgMDOR2DOqKogTB9pCUJBagDBXR6XB0EBkIIsaRsGGMMAxoDBgYHTKJiUYEGDAzHC9EACcUGkIgFzgwZ0QsSBcXHiQvOwgDdEwfFs0sDzt4S6BK4xYjkDOzn0unFeBzOBijIm1Dgmg5YFQwsCMjp1oJ8LyIAACH5BAkKAAAALAAAAAAgACAAAATwEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiUd6GGl6NoiPOH16iZKNlH6KmyWFOggHhEEvAwwMA0N9GBsEC6amhnVcEwavDAazGwIDaH1ipaYLBUTCGgQDA8NdHz0FpqgTBwsLqAbWAAnIA4FWKdMLGdYGEgraigbT0OITBcg5QwPT4xLrROZL6AuQAPUS7bxLpoWidY0JtxLHKhwwMJBTHgPKdEQAACH5BAkKAAAALAAAAAAgACAAAATrEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiUd6GAULDJCRiXo1CpGXDJOUjY%2BYip9DhToJA4RBLwMLCwVDfRgbBAaqqoZ1XBMHswsHtxtFaH1iqaoGNgAIxRpbFAgfPQSqpbgGBqUD1wBXeCYp1AYZ19JJOYgH1KwA4UBvQwXUBxPqVD9L3sbp2BNk2xvvFPJd%2BMFCN6HAAIKgNggY0KtEBAAh%2BQQJCgAAACwAAAAAIAAgAAAE6BDISWlSqerNpyJKhWRdlSAVoVLCWk6JKlAqAavhO9UkUHsqlE6CwO1cRdCQ8iEIfzFVTzLdRAmZX3I2SfYIDMaAFdTESJeaEDAIMxYFqrOUaNW4E4ObYcCXaiBVEgULe0NJaxxtYksjh2NLkZISgDgJhHthkpU4mW6blRiYmZOlh4JWkDqILwUGBnE6TYEbCgevr0N1gH4At7gHiRpFaLNrrq8HNgAJA70AWxQIH1%2BvsYMDAzZQPC9VCNkDWUhGkuE5PxJNwiUK4UfLzOlD4WvzAHaoG9nxPi5d%2BjYUqfAhhykOFwJWiAAAIfkECQoAAAAsAAAAACAAIAAABPAQyElpUqnqzaciSoVkXVUMFaFSwlpOCcMYlErAavhOMnNLNo8KsZsMZItJEIDIFSkLGQoQTNhIsFehRww2CQLKF0tYGKYSg%2BygsZIuNqJksKgbfgIGepNo2cIUB3V1B3IvNiBYNQaDSTtfhhx0CwVPI0UJe0%2Bbm4g5VgcGoqOcnjmjqDSdnhgEoamcsZuXO1aWQy8KAwOAuTYYGwi7w5h%2BKr0SJ8MFihpNbx%2B4Erq7BYBuzsdiH1jCAzoSfl0rVirNbRXlBBlLX%2BBP0XJLAPGzTkAuAOqb0WT5AH7OcdCm5B8TgRwSRKIHQtaLCwg1RAAAOwAAAAAAAAAAAA%3D%3D);
-
-	visibility: hidden;
-	opacity: 0;
-}
-
-// Preview overlay
-.r-overlay-preview .r-overlay-content iframe {
-	width: 100%;
-	height: 100%;
-	max-width: 100%;
-	max-height: 100%;
-	border: 0;
-
-	opacity: 0;
-	visibility: hidden;
-	transition: all 0.3s ease;
-}
-
-.r-overlay-preview[data-state="loaded"] iframe {
-	opacity: 1;
-	visibility: visible;
-}
-
-.r-overlay-preview .r-overlay-content img,
-.r-overlay-preview .r-overlay-content video {
-	position: absolute;
-	max-width: 100%;
-	max-height: 100%;
-	width: 100%;
-	height: 100%;
-	margin: 0;
-	object-fit: scale-down;
-}
-
-.r-overlay-preview[data-preview-fit="none"] img,
-.r-overlay-preview[data-preview-fit="none"] video {
-	object-fit: none;
-}
-
-.r-overlay-preview[data-preview-fit="scale-down"] img,
-.r-overlay-preview[data-preview-fit="scale-down"] video {
-	object-fit: scale-down;
-}
-
-.r-overlay-preview[data-preview-fit="contain"] img,
-.r-overlay-preview[data-preview-fit="contain"] video {
-	object-fit: contain;
-}
-
-.r-overlay-preview[data-preview-fit="cover"] img,
-.r-overlay-preview[data-preview-fit="cover"] video {
-	object-fit: cover;
-}
-
-.r-overlay-preview[data-state="loaded"] .r-overlay-content-inner  {
-	position: absolute;
-	z-index: -1;
+	top: 0;
 	left: 0;
-	top: 45%;
 	width: 100%;
-	text-align: center;
-	letter-spacing: normal;
-}
-.r-overlay-preview .r-overlay-error {
-	font-size: 18px;
-	color: orange;
+	height: 100%;
+	z-index: 1000;
+	background: rgba( 0, 0, 0, 0.9 );
+	transition: all 0.3s ease;
 }

-.r-overlay-preview .x-frame-error  {
-	opacity: 0;
-	transition: opacity 0.3s ease 0.3s;
-}
-.r-overlay-preview[data-state="loaded"] .x-frame-error  {
-	opacity: 1;
-}
+	.reveal > .overlay .spinner {
+		position: absolute;
+		display: block;
+		top: 50%;
+		left: 50%;
+		width: 32px;
+		height: 32px;
+		margin: -16px 0 0 -16px;
+		z-index: 10;
+		background-image: url(data:image/gif;base64,R0lGODlhIAAgAPMAAJmZmf%2F%2F%2F6%2Bvr8nJybW1tcDAwOjo6Nvb26ioqKOjo7Ozs%2FLy8vz8%2FAAAAAAAAAAAACH%2FC05FVFNDQVBFMi4wAwEAAAAh%2FhpDcmVhdGVkIHdpdGggYWpheGxvYWQuaW5mbwAh%2BQQJCgAAACwAAAAAIAAgAAAE5xDISWlhperN52JLhSSdRgwVo1ICQZRUsiwHpTJT4iowNS8vyW2icCF6k8HMMBkCEDskxTBDAZwuAkkqIfxIQyhBQBFvAQSDITM5VDW6XNE4KagNh6Bgwe60smQUB3d4Rz1ZBApnFASDd0hihh12BkE9kjAJVlycXIg7CQIFA6SlnJ87paqbSKiKoqusnbMdmDC2tXQlkUhziYtyWTxIfy6BE8WJt5YJvpJivxNaGmLHT0VnOgSYf0dZXS7APdpB309RnHOG5gDqXGLDaC457D1zZ%2FV%2FnmOM82XiHRLYKhKP1oZmADdEAAAh%2BQQJCgAAACwAAAAAIAAgAAAE6hDISWlZpOrNp1lGNRSdRpDUolIGw5RUYhhHukqFu8DsrEyqnWThGvAmhVlteBvojpTDDBUEIFwMFBRAmBkSgOrBFZogCASwBDEY%2FCZSg7GSE0gSCjQBMVG023xWBhklAnoEdhQEfyNqMIcKjhRsjEdnezB%2BA4k8gTwJhFuiW4dokXiloUepBAp5qaKpp6%2BHo7aWW54wl7obvEe0kRuoplCGepwSx2jJvqHEmGt6whJpGpfJCHmOoNHKaHx61WiSR92E4lbFoq%2BB6QDtuetcaBPnW6%2BO7wDHpIiK9SaVK5GgV543tzjgGcghAgAh%2BQQJCgAAACwAAAAAIAAgAAAE7hDISSkxpOrN5zFHNWRdhSiVoVLHspRUMoyUakyEe8PTPCATW9A14E0UvuAKMNAZKYUZCiBMuBakSQKG8G2FzUWox2AUtAQFcBKlVQoLgQReZhQlCIJesQXI5B0CBnUMOxMCenoCfTCEWBsJColTMANldx15BGs8B5wlCZ9Po6OJkwmRpnqkqnuSrayqfKmqpLajoiW5HJq7FL1Gr2mMMcKUMIiJgIemy7xZtJsTmsM4xHiKv5KMCXqfyUCJEonXPN2rAOIAmsfB3uPoAK%2B%2BG%2Bw48edZPK%2BM6hLJpQg484enXIdQFSS1u6UhksENEQAAIfkECQoAAAAsAAAAACAAIAAABOcQyEmpGKLqzWcZRVUQnZYg1aBSh2GUVEIQ2aQOE%2BG%2BcD4ntpWkZQj1JIiZIogDFFyHI0UxQwFugMSOFIPJftfVAEoZLBbcLEFhlQiqGp1Vd140AUklUN3eCA51C1EWMzMCezCBBmkxVIVHBWd3HHl9JQOIJSdSnJ0TDKChCwUJjoWMPaGqDKannasMo6WnM562R5YluZRwur0wpgqZE7NKUm%2BFNRPIhjBJxKZteWuIBMN4zRMIVIhffcgojwCF117i4nlLnY5ztRLsnOk%2BaV%2BoJY7V7m76PdkS4trKcdg0Zc0tTcKkRAAAIfkECQoAAAAsAAAAACAAIAAABO4QyEkpKqjqzScpRaVkXZWQEximw1BSCUEIlDohrft6cpKCk5xid5MNJTaAIkekKGQkWyKHkvhKsR7ARmitkAYDYRIbUQRQjWBwJRzChi9CRlBcY1UN4g0%2FVNB0AlcvcAYHRyZPdEQFYV8ccwR5HWxEJ02YmRMLnJ1xCYp0Y5idpQuhopmmC2KgojKasUQDk5BNAwwMOh2RtRq5uQuPZKGIJQIGwAwGf6I0JXMpC8C7kXWDBINFMxS4DKMAWVWAGYsAdNqW5uaRxkSKJOZKaU3tPOBZ4DuK2LATgJhkPJMgTwKCdFjyPHEnKxFCDhEAACH5BAkKAAAALAAAAAAgACAAAATzEMhJaVKp6s2nIkolIJ2WkBShpkVRWqqQrhLSEu9MZJKK9y1ZrqYK9WiClmvoUaF8gIQSNeF1Er4MNFn4SRSDARWroAIETg1iVwuHjYB1kYc1mwruwXKC9gmsJXliGxc%2BXiUCby9ydh1sOSdMkpMTBpaXBzsfhoc5l58Gm5yToAaZhaOUqjkDgCWNHAULCwOLaTmzswadEqggQwgHuQsHIoZCHQMMQgQGubVEcxOPFAcMDAYUA85eWARmfSRQCdcMe0zeP1AAygwLlJtPNAAL19DARdPzBOWSm1brJBi45soRAWQAAkrQIykShQ9wVhHCwCQCACH5BAkKAAAALAAAAAAgACAAAATrEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiRMDjI0Fd30%2FiI2UA5GSS5UDj2l6NoqgOgN4gksEBgYFf0FDqKgHnyZ9OX8HrgYHdHpcHQULXAS2qKpENRg7eAMLC7kTBaixUYFkKAzWAAnLC7FLVxLWDBLKCwaKTULgEwbLA4hJtOkSBNqITT3xEgfLpBtzE%2FjiuL04RGEBgwWhShRgQExHBAAh%2BQQJCgAAACwAAAAAIAAgAAAE7xDISWlSqerNpyJKhWRdlSAVoVLCWk6JKlAqAavhO9UkUHsqlE6CwO1cRdCQ8iEIfzFVTzLdRAmZX3I2SfZiCqGk5dTESJeaOAlClzsJsqwiJwiqnFrb2nS9kmIcgEsjQydLiIlHehhpejaIjzh9eomSjZR%2BipslWIRLAgMDOR2DOqKogTB9pCUJBagDBXR6XB0EBkIIsaRsGGMMAxoDBgYHTKJiUYEGDAzHC9EACcUGkIgFzgwZ0QsSBcXHiQvOwgDdEwfFs0sDzt4S6BK4xYjkDOzn0unFeBzOBijIm1Dgmg5YFQwsCMjp1oJ8LyIAACH5BAkKAAAALAAAAAAgACAAAATwEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiUd6GGl6NoiPOH16iZKNlH6KmyWFOggHhEEvAwwMA0N9GBsEC6amhnVcEwavDAazGwIDaH1ipaYLBUTCGgQDA8NdHz0FpqgTBwsLqAbWAAnIA4FWKdMLGdYGEgraigbT0OITBcg5QwPT4xLrROZL6AuQAPUS7bxLpoWidY0JtxLHKhwwMJBTHgPKdEQAACH5BAkKAAAALAAAAAAgACAAAATrEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiUd6GAULDJCRiXo1CpGXDJOUjY%2BYip9DhToJA4RBLwMLCwVDfRgbBAaqqoZ1XBMHswsHtxtFaH1iqaoGNgAIxRpbFAgfPQSqpbgGBqUD1wBXeCYp1AYZ19JJOYgH1KwA4UBvQwXUBxPqVD9L3sbp2BNk2xvvFPJd%2BMFCN6HAAIKgNggY0KtEBAAh%2BQQJCgAAACwAAAAAIAAgAAAE6BDISWlSqerNpyJKhWRdlSAVoVLCWk6JKlAqAavhO9UkUHsqlE6CwO1cRdCQ8iEIfzFVTzLdRAmZX3I2SfYIDMaAFdTESJeaEDAIMxYFqrOUaNW4E4ObYcCXaiBVEgULe0NJaxxtYksjh2NLkZISgDgJhHthkpU4mW6blRiYmZOlh4JWkDqILwUGBnE6TYEbCgevr0N1gH4At7gHiRpFaLNrrq8HNgAJA70AWxQIH1%2BvsYMDAzZQPC9VCNkDWUhGkuE5PxJNwiUK4UfLzOlD4WvzAHaoG9nxPi5d%2BjYUqfAhhykOFwJWiAAAIfkECQoAAAAsAAAAACAAIAAABPAQyElpUqnqzaciSoVkXVUMFaFSwlpOCcMYlErAavhOMnNLNo8KsZsMZItJEIDIFSkLGQoQTNhIsFehRww2CQLKF0tYGKYSg%2BygsZIuNqJksKgbfgIGepNo2cIUB3V1B3IvNiBYNQaDSTtfhhx0CwVPI0UJe0%2Bbm4g5VgcGoqOcnjmjqDSdnhgEoamcsZuXO1aWQy8KAwOAuTYYGwi7w5h%2BKr0SJ8MFihpNbx%2B4Erq7BYBuzsdiH1jCAzoSfl0rVirNbRXlBBlLX%2BBP0XJLAPGzTkAuAOqb0WT5AH7OcdCm5B8TgRwSRKIHQtaLCwg1RAAAOwAAAAAAAAAAAA%3D%3D);

-.r-overlay-preview[data-state="loading"] .r-overlay-spinner {
-	opacity: 0.6;
-	visibility: visible;
-}
+		visibility: visible;
+		opacity: 0.6;
+		transition: all 0.3s ease;
+	}

-// Help overlay
-.r-overlay-help .r-overlay-content {
-	overflow: auto;
-}
+	.reveal > .overlay header {
+		position: absolute;
+		left: 0;
+		top: 0;
+		width: 100%;
+		padding: $overlayHeaderPadding;
+		z-index: 2;
+		box-sizing: border-box;
+	}
+		.reveal > .overlay header a {
+			display: inline-block;
+			width: $overlayHeaderHeight;
+			height: $overlayHeaderHeight;
+			line-height: 36px;
+			padding: 0 10px;
+			float: right;
+			opacity: 0.6;

-.r-overlay-help-content {
-	max-width: 560px;
-	padding: 20px 0;
-	margin: auto;
-	text-align: center;
-	letter-spacing: normal;
-}
+			box-sizing: border-box;
+		}
+			.reveal > .overlay header a:hover {
+				opacity: 1;
+			}
+			.reveal > .overlay header a .icon {
+				display: inline-block;
+				width: 20px;
+				height: 20px;

-.r-overlay-help-content .title {
-	font-size: 20px;
-	margin-top: 0;
-}
+				background-position: 50% 50%;
+				background-size: 100%;
+				background-repeat: no-repeat;
+			}
+			.reveal > .overlay header a.close .icon {
+				background-image: url(data:image/png;base64,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);
+			}
+			.reveal > .overlay header a.external .icon {
+				background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAAcElEQVRYR+2WSQoAIQwEzf8f7XiOMkUQxUPlGkM3hVmiQfQR9GYnH1SsAQlI4DiBqkCMoNb9y2e90IAEJPAcgdznU9+engMaeJ7Azh5Y1U67gAho4DqBqmB1buAf0MB1AlVBek83ZPkmJMGc1wAR+AAqod/B97TRpQAAAABJRU5ErkJggg==);
+			}

-/* Specificity battle with reveal.js theme table styles */
-.r-overlay-help .r-overlay-help-content table {
-	border: 1px solid #fff;
-	border-collapse: collapse;
-	font-size: 16px;
-	text-align: left;
-}
+	.reveal > .overlay .viewport {
+		position: absolute;
+		display: flex;
+		top: $overlayHeaderHeight + $overlayHeaderPadding*2;
+		right: 0;
+		bottom: 0;
+		left: 0;
+	}

-.r-overlay-help .r-overlay-help-content table th,
-.r-overlay-help .r-overlay-help-content table td {
-	width: 240px;
-	padding: 14px;
-	border: 1px solid #fff;
-	vertical-align: middle;
-}
+	.reveal > .overlay.overlay-preview .viewport iframe {
+		width: 100%;
+		height: 100%;
+		max-width: 100%;
+		max-height: 100%;
+		border: 0;
+
+		opacity: 0;
+		visibility: hidden;
+		transition: all 0.3s ease;
+	}
+
+	.reveal > .overlay.overlay-preview.loaded .viewport iframe {
+		opacity: 1;
+		visibility: visible;
+	}
+
+	.reveal > .overlay.overlay-preview.loaded .viewport-inner  {
+		position: absolute;
+		z-index: -1;
+		left: 0;
+		top: 45%;
+		width: 100%;
+		text-align: center;
+		letter-spacing: normal;
+	}
+	.reveal > .overlay.overlay-preview .x-frame-error  {
+		opacity: 0;
+		transition: opacity 0.3s ease 0.3s;
+	}
+	.reveal > .overlay.overlay-preview.loaded .x-frame-error  {
+		opacity: 1;
+	}
+
+	.reveal > .overlay.overlay-preview.loaded .spinner {
+		opacity: 0;
+		visibility: hidden;
+		transform: scale(0.2);
+	}
+
+	.reveal > .overlay.overlay-help .viewport {
+		overflow: auto;
+		color: #fff;
+	}
+
+	.reveal > .overlay.overlay-help .viewport .viewport-inner {
+		width: 600px;
+		margin: auto;
+		padding: 20px 20px 80px 20px;
+		text-align: center;
+		letter-spacing: normal;
+	}
+
+	.reveal > .overlay.overlay-help .viewport .viewport-inner .title {
+		font-size: 20px;
+	}
+
+	.reveal > .overlay.overlay-help .viewport .viewport-inner table {
+		border: 1px solid #fff;
+		border-collapse: collapse;
+		font-size: 16px;
+	}
+
+	.reveal > .overlay.overlay-help .viewport .viewport-inner table th,
+	.reveal > .overlay.overlay-help .viewport .viewport-inner table td {
+		width: 200px;
+		padding: 14px;
+		border: 1px solid #fff;
+		vertical-align: middle;
+	}
+
+	.reveal > .overlay.overlay-help .viewport .viewport-inner table th {
+		padding-top: 20px;
+		padding-bottom: 20px;
+	}

-.r-overlay-help .r-overlay-help-content table th {
-	padding-top: 20px;
-	padding-bottom: 20px;
-}

 /*********************************************
 * PLAYBACK COMPONENT
@@ -1720,10 +1633,6 @@ $controlsArrowAngleActive: 36deg;
 	opacity: 0.4;
 }

-.reveal .hljs.has-highlights.fragment {
-	transition: all .2s ease;
-}
-
 .reveal .hljs:not(:first-child).fragment {
 	position: absolute;
 	top: 0;
@@ -1887,43 +1796,6 @@ $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
 *********************************************/
@@ -1948,239 +1820,6 @@ $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;
-	}
-
-	.r-overlay,
-	.pause-overlay {
-		position: fixed;
-	}
-
-	.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
 *********************************************/
--- a/css/theme/source/beige.scss
+++ b/css/theme/source/beige.scss
@@ -6,7 +6,6 @@


 // Default mixins and settings -----------------
-@use "sass:color";
@import "../template/mixins";
@import "../template/settings";
 // ---------------------------------------------
@@ -24,13 +23,10 @@ $headingColor: #333;
 $headingTextShadow: none;
 $backgroundColor: #f7f3de;
 $linkColor: #8b743d;
-$linkColorHover: color.scale( $linkColor, $lightness: 20% );
+$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) );
--- a/css/theme/source/black-contrast.scss
+++ b/css/theme/source/black-contrast.scss
@@ -1,50 +0,0 @@
-/**
- * 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.
- * - $mainFontSize controls code blocks, too (although under some ratio).
- */
-
-
-// Default mixins and settings -----------------
-@use "sass:color";
-@import "../template/mixins";
-@import "../template/settings";
-// ---------------------------------------------
-
-
-// Include theme-specific fonts
-@import url(./fonts/source-sans-pro/source-sans-pro.css);
-
-
-// Override theme settings (see ../template/settings.scss)
-$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: color.scale( $linkColor, $lightness: 15% );
-$selectionBackgroundColor: color.scale( $linkColor, $lightness: 25% );
-
-$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";
-// ---------------------------------------------
--- a/css/theme/source/black.scss
+++ b/css/theme/source/black.scss
@@ -6,7 +6,6 @@


 // Default mixins and settings -----------------
-@use "sass:color";
@import "../template/mixins";
@import "../template/settings";
 // ---------------------------------------------
@@ -30,8 +29,8 @@ $headingLetterSpacing: normal;
 $headingTextTransform: uppercase;
 $headingFontWeight: 600;
 $linkColor: #42affa;
-$linkColorHover: color.scale( $linkColor, $lightness: 15% );
-$selectionBackgroundColor: rgba( $linkColor, 0.75 );
+$linkColorHover: lighten( $linkColor, 15% );
+$selectionBackgroundColor: lighten( $linkColor, 25% );

 $heading1Size: 2.5em;
 $heading2Size: 1.6em;
--- a/css/theme/source/blood.scss
+++ b/css/theme/source/blood.scss
@@ -10,8 +10,7 @@
 *
 */

-// Default mixins and settings -----------------
-@use "sass:color";
+ // Default mixins and settings -----------------
@import "../template/mixins";
@import "../template/settings";
 // ---------------------------------------------
@@ -41,7 +40,7 @@ $heading1TextShadow: 0 1px 0 #ccc, 0 2px 0 #c9c9c9, 0 3px 0 #bbb, 0 4px 0 #b9b9b

 // Links
 $linkColor: $blood;
-$linkColorHover: color.scale( $linkColor, $lightness: 20% );
+$linkColorHover: lighten( $linkColor, 20% );

 // Text selection
 $selectionBackgroundColor: $blood;
--- a/css/theme/source/dracula.scss
+++ b/css/theme/source/dracula.scss
@@ -9,10 +9,9 @@
@import "../template/settings";
 // ---------------------------------------------

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

+
+// Include theme-specific fonts
 $systemFontsSansSerif: -apple-system,
 					   BlinkMacSystemFont,
 					   avenir next,
@@ -87,21 +86,47 @@ $codeFont: "Fira Code", $systemFontsMono;
 	--r-list-bullet-color: #{$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);
-		}
-	}
+.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);
+}
+
+// Dracula colored list bullets and numbers
+.reveal ul {
+	list-style: none;
+}
+
+.reveal ul li::before {
+	content: "•";
+	color: var(--r-list-bullet-color);
+	display: inline-block;
+	width: 1em;
+	margin-left: -1em
+}
+
+.reveal ol {
+	list-style: none;
+	counter-reset: li;
+}
+
+.reveal ol li::before {
+	content: counter(li) ".";
+	color: var(--r-list-bullet-color);
+	display: inline-block;
+	width: 2em;
+
+	margin-left: -2.5em;
+    margin-right: 0.5em;
+	text-align: right;
+}
+
+.reveal ol li {
+	counter-increment: li
+}
--- a/css/theme/source/moon.scss
+++ b/css/theme/source/moon.scss
@@ -5,7 +5,6 @@


 // Default mixins and settings -----------------
-@use "sass:color";
@import "../template/mixins";
@import "../template/settings";
 // ---------------------------------------------
@@ -19,6 +18,10 @@
 /**
 * Solarized colors by Ethan Schoonover
 */
+html * {
+	color-profile: sRGB;
+	rendering-intent: auto;
+}

 // Solarized colors
 $base03:    #002b36;
@@ -44,7 +47,7 @@ $headingColor: $base2;
 $headingTextShadow: none;
 $backgroundColor: $base03;
 $linkColor: $blue;
-$linkColorHover: color.scale( $linkColor, $lightness: 20% );
+$linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: $magenta;

 // Change text colors against light slide backgrounds
--- a/css/theme/source/night.scss
+++ b/css/theme/source/night.scss
@@ -6,7 +6,6 @@


 // Default mixins and settings -----------------
-@use "sass:color";
@import "../template/mixins";
@import "../template/settings";
 // ---------------------------------------------
@@ -22,7 +21,7 @@ $backgroundColor: #111;

 $mainFont: 'Open Sans', sans-serif;
 $linkColor: #e7ad52;
-$linkColorHover: color.scale( $linkColor, $lightness: 20% );
+$linkColorHover: lighten( $linkColor, 20% );
 $headingFont: 'Montserrat', Impact, sans-serif;
 $headingTextShadow: none;
 $headingLetterSpacing: -0.03em;
--- a/css/theme/source/serif.scss
+++ b/css/theme/source/serif.scss
@@ -7,7 +7,6 @@


 // Default mixins and settings -----------------
-@use "sass:color";
@import "../template/mixins";
@import "../template/settings";
 // ---------------------------------------------
@@ -23,12 +22,9 @@ $headingTextShadow: none;
 $headingTextTransform: none;
 $backgroundColor: #F0F1EB;
 $linkColor: #51483D;
-$linkColorHover: color.scale( $linkColor, $lightness: 20% );
+$linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: #26351C;

-$overlayElementBgColor: 0, 0, 0;
-$overlayElementFgColor: 240, 240, 240;
-
 .reveal a {
  line-height: 1.3em;
 }
--- a/css/theme/source/simple.scss
+++ b/css/theme/source/simple.scss
@@ -8,7 +8,6 @@


 // Default mixins and settings -----------------
-@use "sass:color";
@import "../template/mixins";
@import "../template/settings";
 // ---------------------------------------------
@@ -29,12 +28,9 @@ $headingTextShadow: none;
 $headingTextTransform: none;
 $backgroundColor: #fff;
 $linkColor: #00008B;
-$linkColorHover: color.scale( $linkColor, $lightness: 20% );
+$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);

--- a/css/theme/source/sky.scss
+++ b/css/theme/source/sky.scss
@@ -6,7 +6,6 @@


 // Default mixins and settings -----------------
-@use "sass:color";
@import "../template/mixins";
@import "../template/settings";
 // ---------------------------------------------
@@ -27,12 +26,9 @@ $headingLetterSpacing: -0.08em;
 $headingTextShadow: none;
 $backgroundColor: #f7fbfc;
 $linkColor: #3b759e;
-$linkColorHover: color.scale( $linkColor, $lightness: 20% );
+$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;
--- a/css/theme/source/solarized.scss
+++ b/css/theme/source/solarized.scss
@@ -5,7 +5,6 @@


 // Default mixins and settings -----------------
-@use "sass:color";
@import "../template/mixins";
@import "../template/settings";
 // ---------------------------------------------
@@ -49,12 +48,9 @@ $headingColor: $base01;
 $headingTextShadow: none;
 $backgroundColor: $base3;
 $linkColor: $blue;
-$linkColorHover: color.scale( $linkColor, $lightness: 20% );
+$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) );
--- a/css/theme/source/white-contrast.scss
+++ b/css/theme/source/white-contrast.scss
@@ -1,53 +0,0 @@
-/**
- * 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.
- * - $mainFontSize controls code blocks, too (although under some ratio).
- */
-
-
-// Default mixins and settings -----------------
-@use "sass:color";
-@import "../template/mixins";
-@import "../template/settings";
-// ---------------------------------------------
-
-
-// Include theme-specific fonts
-@import url(./fonts/source-sans-pro/source-sans-pro.css);
-
-
-// Override theme settings (see ../template/settings.scss)
-$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: color.scale( $linkColor, $lightness: 15% );
-$selectionBackgroundColor: color.scale( $linkColor, $lightness: 25% );
-
-$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";
-// ---------------------------------------------
--- a/css/theme/source/white.scss
+++ b/css/theme/source/white.scss
@@ -6,7 +6,6 @@


 // Default mixins and settings -----------------
-@use "sass:color";
@import "../template/mixins";
@import "../template/settings";
 // ---------------------------------------------
@@ -30,17 +29,14 @@ $headingLetterSpacing: normal;
 $headingTextTransform: uppercase;
 $headingFontWeight: 600;
 $linkColor: #2a76dd;
-$linkColorHover: color.scale( $linkColor, $lightness: 15% );
-$selectionBackgroundColor: color.scale( $linkColor, $lightness: 25% );
+$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);

--- a/css/theme/template/exposer.scss
+++ b/css/theme/template/exposer.scss
@@ -1,6 +1,4 @@
-// Exposes theme's variables for easy reuse in CSS for plugin authors
-
-@use "sass:color";
+// Exposes theme's variables for easy re-use in CSS for plugin authors

 :root {
  --r-background-color: #{$backgroundColor};
@@ -23,10 +21,8 @@
  --r-heading4-size: #{$heading4Size};
  --r-code-font: #{$codeFont};
  --r-link-color: #{$linkColor};
-  --r-link-color-dark: #{color.scale( $linkColor, $lightness: -15% )};
+  --r-link-color-dark: #{darken($linkColor , 15% )};
  --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};
 }
--- a/css/theme/template/settings.scss
+++ b/css/theme/template/settings.scss
@@ -1,5 +1,3 @@
-@use "sass:color";
-
 // Base settings for all themes that can optionally be
 // overridden by the super-theme

@@ -34,17 +32,12 @@ $codeFont: monospace;

 // Links and actions
 $linkColor: #13DAEC;
-$linkColorHover: color.scale( $linkColor, $lightness: 20% );
+$linkColorHover: lighten( $linkColor, 20% );

 // Text selection
 $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() {
--- a/css/theme/template/theme.scss
+++ b/css/theme/template/theme.scss
@@ -278,7 +278,8 @@

 .reveal .roll span:after {
 	color: #fff;
-	background: var(--r-link-color-dark);
+	// background: darken( var(--r-link-color), 15% );
+	 background: var(--r-link-color-dark);

 }

--- a/demo.html
+++ b/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 javascript" data-trim data-line-numbers>
+					<pre data-id="code-animation"><code class="hljs" 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 javascript" 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" data-trim data-line-numbers="|4,8-11|17|22-24"><script type="text/template">
 						import React, { useState } from 'react';

 						function Example() {
@@ -165,9 +165,9 @@
 				</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;"></div>
-						<div data-id="box2" style="background: magenta; width: 200px; height: 200px;"></div>
-						<div data-id="box3" style="background: yellow; width: 100px; height: 100px;"></div>
+						<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>
@@ -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/).
@@ -197,25 +197,6 @@
 					</script>
 				</section>

-				<section>
-					<h2>Lightbox</h2>
-					Turn any element into a <a href="https://revealjs.com/lightbox/">lightbox</a> using <strong>data‑preview‑image</strong> & <strong>data‑preview‑video</strong>.
-					<div class="r-hstack" style="gap: 2rem;">
-						<div>
-							<pre style="font-size: 12px; width: 100%"><code class="html" data-trim>
-								&lt;img src="image.png" data-preview-image="image.png"&gt;
-							</code></pre>
-							<img src="https://static.slid.es/logo/v2/slides-symbol-1024x1024.png" height="100" data-preview-image>
-						</div>
-						<div>
-							<pre style="font-size: 12px; width: 100%"><code class="html" data-trim>
-								&lt;img src="video.png" data-preview-video="video.mp4"&gt;
-							</code></pre>
-							<img src="https://static.slid.es/site/homepage/v1/homepage-video-editor.png" height="100" data-preview-video="https://static.slid.es/site/homepage/v1/homepage-video-editor.mp4">
-						</div>
-					</div>
-				</section>
-
 				<section>
 					<p>Add the <code>r-fit-text</code> class to auto-size text</p>
 					<h2 class="r-fit-text">FIT TEXT</h2>
@@ -268,17 +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="#/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>
+						<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>
 					</p>
 				</section>

--- a/dist/reveal.css
+++ b/dist/reveal.css
--- a/dist/reveal.esm.js
+++ b/dist/reveal.esm.js
--- a/dist/reveal.esm.js.map
+++ b/dist/reveal.esm.js.map
--- a/dist/reveal.js
+++ b/dist/reveal.js
--- a/dist/reveal.js.map
+++ b/dist/reveal.js.map
--- a/dist/theme/beige.css
+++ b/dist/theme/beige.css
@@ -33,22 +33,20 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #8b743d;
-  --r-link-color-dark: rgb(118.15, 98.6, 51.85);
-  --r-link-color-hover: rgb(179.36, 150.84, 82.64);
+  --r-link-color-dark: #564826;
+  --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: 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: #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-color: var(--r-background-color);
 }

--- a/dist/theme/black-contrast.css
+++ b/dist/theme/black-contrast.css
@@ -1,362 +0,0 @@
-/**
- * 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: rgb(19.8216494845, 155.4536082474, 248.7783505155);
-  --r-link-color-hover: rgb(94.35, 187, 250.75);
-  --r-selection-background-color: rgb(113.25, 195, 251.25);
-  --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);
-  }
-}
--- a/dist/theme/black.css
+++ b/dist/theme/black.css
@@ -32,12 +32,10 @@ section.has-light-background, section.has-light-background h1, section.has-light
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #42affa;
-  --r-link-color-dark: rgb(19.8216494845, 155.4536082474, 248.7783505155);
-  --r-link-color-hover: rgb(94.35, 187, 250.75);
-  --r-selection-background-color: rgba(66, 175, 250, 0.75);
+  --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 {
--- a/dist/theme/blood.css
+++ b/dist/theme/blood.css
@@ -38,12 +38,10 @@ section.has-light-background, section.has-light-background h1, section.has-light
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #a23;
-  --r-link-color-dark: rgb(144.5, 28.9, 43.35);
-  --r-link-color-hover: rgb(214.2, 51, 71.4);
+  --r-link-color-dark: #6a1520;
+  --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 {
--- a/dist/theme/dracula.css
+++ b/dist/theme/dracula.css
@@ -1,9 +1,8 @@
+@charset "UTF-8";
 /**
 * Dracula Dark theme for reveal.js.
 * Based on https://draculatheme.com
 */
-@import url(./fonts/league-gothic/league-gothic.css);
-@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 /**
 * Dracula colors by Zeno Rocha
 * https://draculatheme.com/contribute
@@ -41,12 +40,10 @@ section.has-light-background, section.has-light-background h1, section.has-light
  --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: rgb(255, 64.6, 174.0089552239);
+  --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 {
@@ -376,12 +373,42 @@ section.has-light-background, section.has-light-background h1, section.has-light
 .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 {
+
+.reveal ul {
+  list-style: none;
+}
+
+.reveal ul li::before {
+  content: "•";
  color: var(--r-list-bullet-color);
+  display: inline-block;
+  width: 1em;
+  margin-left: -1em;
+}
+
+.reveal ol {
+  list-style: none;
+  counter-reset: li;
+}
+
+.reveal ol li::before {
+  content: counter(li) ".";
+  color: var(--r-list-bullet-color);
+  display: inline-block;
+  width: 2em;
+  margin-left: -2.5em;
+  margin-right: 0.5em;
+  text-align: right;
+}
+
+.reveal ol li {
+  counter-increment: li;
 }
--- a/dist/theme/league.css
+++ b/dist/theme/league.css
@@ -35,22 +35,20 @@ section.has-light-background, section.has-light-background h1, section.has-light
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #13DAEC;
-  --r-link-color-dark: rgb(16.15, 185.3, 200.6);
-  --r-link-color-hover: rgb(66.2, 225.4, 239.8);
+  --r-link-color-dark: #0d99a5;
+  --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: 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: #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-color: var(--r-background-color);
 }

--- a/dist/theme/moon.css
+++ b/dist/theme/moon.css
@@ -7,6 +7,11 @@
 /**
 * 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;
 }
@@ -35,12 +40,10 @@ section.has-light-background, section.has-light-background h1, section.has-light
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #268bd2;
-  --r-link-color-dark: rgb(32.3, 118.15, 178.5);
-  --r-link-color-hover: rgb(77.5161290323, 162.8774193548, 222.8838709677);
+  --r-link-color-dark: #1a6091;
+  --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 {
--- a/dist/theme/night.css
+++ b/dist/theme/night.css
@@ -33,12 +33,10 @@ section.has-light-background, section.has-light-background h1, section.has-light
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #e7ad52;
-  --r-link-color-dark: rgb(225.2802030457, 153.4573604061, 40.7697969543);
-  --r-link-color-hover: rgb(235.8, 189.4, 116.6);
+  --r-link-color-dark: #d08a1d;
+  --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 {
--- a/dist/theme/serif.css
+++ b/dist/theme/serif.css
@@ -36,12 +36,10 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #51483D;
-  --r-link-color-dark: rgb(68.85, 61.2, 51.85);
-  --r-link-color-hover: rgb(122.9830985915, 109.3183098592, 92.6169014085);
+  --r-link-color-dark: #25211c;
+  --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 {
--- a/dist/theme/simple.css
+++ b/dist/theme/simple.css
@@ -35,12 +35,10 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #00008B;
-  --r-link-color-dark: rgb(0, 0, 118.15);
-  --r-link-color-hover: rgb(0, 0, 213.2);
+  --r-link-color-dark: #00003f;
+  --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 {
--- a/dist/theme/sky.css
+++ b/dist/theme/sky.css
@@ -37,12 +37,10 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #3b759e;
-  --r-link-color-dark: rgb(50.15, 99.45, 134.3);
-  --r-link-color-hover: rgb(84.330875576, 146.9815668203, 191.269124424);
+  --r-link-color-dark: #264c66;
+  --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 {
--- a/dist/theme/solarized.css
+++ b/dist/theme/solarized.css
@@ -36,12 +36,10 @@ html * {
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #268bd2;
-  --r-link-color-dark: rgb(32.3, 118.15, 178.5);
-  --r-link-color-hover: rgb(77.5161290323, 162.8774193548, 222.8838709677);
+  --r-link-color-dark: #1a6091;
+  --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 {
--- a/dist/theme/white-contrast.css
+++ b/dist/theme/white-contrast.css
@@ -1,362 +0,0 @@
-/**
- * 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: rgb(30.7720647773, 99.5566801619, 192.7779352227);
-  --r-link-color-hover: rgb(73.95, 138.55, 226.1);
-  --r-selection-background-color: rgb(95.25, 152.25, 229.5);
-  --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);
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-.reveal h1 {
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-.reveal h2 {
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-.reveal h3 {
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-.reveal h1 {
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-
-/*********************************************
- * OTHER
- *********************************************/
-.reveal p {
-  margin: var(--r-block-margin) 0;
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-/* Remove trailing margins after titles */
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-.reveal h3:last-child,
-.reveal h4:last-child,
-.reveal h5:last-child,
-.reveal h6:last-child {
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-.reveal blockquote {
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-  padding: 5px;
-  font-style: italic;
-  background: rgba(255, 255, 255, 0.05);
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-}
-
-.reveal blockquote p:first-child,
-.reveal blockquote p:last-child {
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-.reveal q {
-  font-style: italic;
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-.reveal pre {
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-  word-wrap: break-word;
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-}
-
-.reveal code {
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-  text-transform: none;
-  tab-size: 2;
-}
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-.reveal pre code {
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-  padding: 5px;
-  overflow: auto;
-  max-height: 400px;
-  word-wrap: normal;
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-.reveal .code-wrapper {
-  white-space: normal;
-}
-
-.reveal .code-wrapper code {
-  white-space: pre;
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-.reveal table {
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-  border-collapse: collapse;
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-.reveal table th {
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-  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 {
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-.reveal small {
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-  font-size: 0.6em;
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-  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 {
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-  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);
-}
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--- a/dist/theme/white.css
+++ b/dist/theme/white.css
@@ -32,12 +32,10 @@ section.has-dark-background, section.has-dark-background h1, section.has-dark-ba
  --r-heading4-size: 1em;
  --r-code-font: monospace;
  --r-link-color: #2a76dd;
-  --r-link-color-dark: rgb(30.7720647773, 99.5566801619, 192.7779352227);
-  --r-link-color-hover: rgb(73.95, 138.55, 226.1);
-  --r-selection-background-color: rgb(95.25, 152.25, 229.5);
+  --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;
 }

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--- a/dist/theme/white_contrast_compact_verbatim_headers.css
+++ b/dist/theme/white_contrast_compact_verbatim_headers.css
@@ -1,360 +0,0 @@
-/**
- * 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
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- * - Keep the source similar to black.css - for easy comparison.
- * - $mainFontSize controls code blocks, too (although under some ratio).
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-  vertical-align: top;
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-  margin: var(--r-block-margin) 0;
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-/*********************************************
- * LINKS
- *********************************************/
-.reveal a {
-  color: var(--r-link-color);
-  text-decoration: none;
-  transition: color 0.15s ease;
-}
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-.reveal a:hover {
-  color: var(--r-link-color-hover);
-  text-shadow: none;
-  border: none;
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-  color: #fff;
-  background: var(--r-link-color-dark);
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-/*********************************************
- * Frame helper
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-.reveal .r-frame {
-  border: 4px solid var(--r-main-color);
-  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
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-  transition: all 0.15s linear;
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-  border-color: var(--r-link-color);
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- * NAVIGATION CONTROLS
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-  color: var(--r-link-color);
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- * PROGRESS BAR
- *********************************************/
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-  background: rgba(0, 0, 0, 0.2);
-  color: var(--r-link-color);
-}
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-/*********************************************
- * PRINT BACKGROUND
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-@media print {
-  .backgrounds {
-    background-color: var(--r-background-color);
-  }
-}
--- a/examples/500-slides.html
+++ b/examples/500-slides.html
@@ -1,526 +0,0 @@
-<!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>
--- a/examples/backgrounds.html
+++ b/examples/backgrounds.html
@@ -89,7 +89,7 @@
 					<h2>Same background twice (2/2)</h2>
 				</section>

-				<section data-background-video="https://static.slid.es/site/homepage/v1/homepage-video-editor.mp4,https://static.slid.es/site/homepage/v1/homepage-video-editor.webm">
+				<section data-background-video="https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.mp4,https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.webm">
 					<h2>Video background</h2>
 				</section>

--- a/examples/lightbox.html
+++ b/examples/lightbox.html
@@ -1,144 +0,0 @@
-<!doctype html>
-<html lang="en">
-
-	<head>
-		<meta charset="utf-8">
-
-		<title>reveal.js - Ligthbox</title>
-
-		<link rel="stylesheet" href="../dist/reveal.css">
-		<link rel="stylesheet" href="../dist/theme/black.css" id="theme">
-
-		<style>
-			.reveal {
-				font-size: 24px;
-			}
-			.reveal figure {
-				margin: 0 0 1rem 0;
-				text-align: left;
-			}
-			.reveal figure img,
-			.reveal figure video {
-				margin: 0.25rem 0 0 0;
-			}
-			figcaption, a {
-				font-size: 16px;
-			}
-		</style>
-	</head>
-
-	<body>
-
-		<div class="reveal">
-
-			<div class="slides">
-
-				<section>
-
-					<h2>Preview Overlays</h2>
-
-					<div class="r-hstack items-start">
-						<div class="r-vstack items-start">
-							<h5>Images</h5>
-							<figure>
-								<figcaption>Preview with default settings:</figcaption>
-								<img height="50" src="https://static.slid.es/images/alphabet/v1/a.png" data-preview-image>
-							</figure>
-							<figure>
-								<figcaption>Preview with data-preview-fit="contain"</figcaption>
-								<img height="50" src="https://static.slid.es/images/alphabet/v1/a.png" data-preview-image data-preview-fit="contain">
-							</figure>
-							<figure>
-								<figcaption>Preview with data-preview-fit="cover"</figcaption>
-								<img height="50" src="https://static.slid.es/images/alphabet/v1/a.png" data-preview-image data-preview-fit="cover">
-							</figure>
-							<figure>
-								<figcaption>Preview another image (c)</figcaption>
-								<img height="50" src="https://static.slid.es/images/alphabet/v1/b.png" data-preview-image="https://static.slid.es/images/alphabet/v1/c.png">
-							</figure>
-							<a href="#" data-preview-image="https://static.slid.es/images/alphabet/v1/x.png">
-								Preview image from a link.
-							</a>
-						</div>
-
-						<div style="width: 1px; height: 30vh; margin: 0 3rem;background-color: #999;"></div>
-
-						<div class="r-vstack items-start">
-							<h5>Videos</h5>
-							<figure>
-								<figcaption>Preview video</figcaption>
-								<img height="50" src="https://static.slid.es/images/alphabet/v1/x.png" data-preview-video="https://static.slid.es/site/homepage/v1/homepage-video-editor.mp4">
-							</figure>
-							<figure>
-								<figcaption>Preview video</figcaption>
-								<video height="50" src="https://static.slid.es/site/homepage/v1/homepage-video-editor.mp4" data-preview-video></video>
-							</figure>
-							<a href="#" data-preview-video="https://static.slid.es/site/homepage/v1/homepage-video-editor.mp4">
-								Preview video from a link.
-							</a>
-						</div>
-
-						<div style="width: 1px; height: 30vh; margin: 0 3rem;background-color: #999;"></div>
-
-						<div class="r-vstack items-start">
-							<h5>Iframes</h5>
-							<a href="https://hakim.se">https://hakim.se | data-preview-link</a>
-							<a data-preview-link href="https://hakim.se">https://hakim.se | data-preview-link</a>
-							<br />
-							<a data-preview-link="false" href="https://hakim.se">https://hakim.se | data-preview-link=false</a>
-							<br />
-							<figure>
-								<figcaption>Preview link from an image</figcaption>
-								<img height="50" src="https://static.slid.es/images/alphabet/v1/a.png" data-preview-link="https://hakim.se">
-							</figure>
-						</div>
-					</div>
-
-				</section>
-
-				<section style="text-align: left;">
-
-					<h2>Lightbox</h2>
-
-					<div class="r-hstack items-start justify-start">
-						<div class="r-vstack items-start">
-							<h5>Images</h5>
-							<figure>
-								<img height="100" src="https://static.slid.es/images/alphabet/v1/a.png" data-preview-image data-preview-fit="contain">
-							</figure>
-						</div>
-
-						<div style="width: 1px; height: 20vh; margin: 0 3rem;background-color: #222;"></div>
-
-						<div class="r-vstack items-start">
-							<h5>Videos</h5>
-							<figure>
-								<video height="100" src="https://static.slid.es/site/homepage/v1/homepage-video-editor.mp4" data-preview-video></video>
-							</figure>
-						</div>
-
-						<div style="width: 1px; height: 20vh; margin: 0 3rem;background-color: #222;"></div>
-
-						<div class="r-vstack items-start">
-							<h5>Iframes</h5>
-							<a style="font-size: 28px;" data-preview-link href="https://hakim.se">https://hakim.se</a>
-						</div>
-					</div>
-
-				</section>
-
-			</div>
-
-		</div>
-
-		<script src="../dist/reveal.js"></script>
-		<script>
-			Reveal.initialize({
-				previewLinks: false,
-				width: 1280,
-				height: 720
-			});
-		</script>
-
-	</body>
-</html>
--- a/examples/markdown.html
+++ b/examples/markdown.html
@@ -99,29 +99,10 @@
                    </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">
-                        ![Sample image](https://static.slid.es/logo/v2/slides-symbol-512x512.png)
+                        ![Sample image](https://s3.amazonaws.com/static.slid.es/logo/v2/slides-symbol-512x512.png)
                    </script>
                </section>

--- a/examples/markdown.md
+++ b/examples/markdown.md
@@ -33,7 +33,7 @@ Content 3.2

 ## External 3.3 (Image)

-![External Image](https://static.slid.es/logo/v2/slides-symbol-512x512.png)
+![External Image](https://s3.amazonaws.com/static.slid.es/logo/v2/slides-symbol-512x512.png)


 ## External 3.4 (Math)
--- a/examples/media.html
+++ b/examples/media.html
@@ -33,10 +33,10 @@

 				<section>
 					<h2>Video</h2>
-					<video src="https://static.slid.es/site/homepage/v1/homepage-video-editor.mp4" data-autoplay></video>
+					<video src="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4" data-autoplay></video>
 				</section>

-				<section data-background-video="https://static.slid.es/site/homepage/v1/homepage-video-editor.mp4">
+				<section data-background-video="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4">
 					<h2>Background Video</h2>
 				</section>

--- a/examples/scroll.html
+++ b/examples/scroll.html
@@ -1,120 +0,0 @@
-<!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://static.slid.es/site/homepage/v1/homepage-video-editor.mp4,https://static.slid.es/site/homepage/v1/homepage-video-editor.webm">
-            <div style="background-color: rgba(0, 0, 0, 0.9); color: #fff; padding: 20px;">
-              <h2>Video background</h2>
-            </div>
-          </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>
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -1,20 +1,22 @@
-const fs = require('fs');
 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
 const sass = require('sass')

 const gulp = require('gulp')
+const tap = require('gulp-tap')
 const zip = require('gulp-zip')
-const header = require('gulp-header-comment')
+const header = require('gulp-header')
 const eslint = require('gulp-eslint')
 const minify = require('gulp-clean-css')
 const connect = require('gulp-connect')
@@ -24,21 +26,13 @@ const root = yargs.argv.root || '.'
 const port = yargs.argv.port || 8000
 const host = yargs.argv.host || 'localhost'

-const cssLicense = `
-reveal.js ${pkg.version}
-${pkg.homepage}
-MIT licensed
-
-Copyright (C) 2011-2024 Hakim El Hattab, https://hakim.se
-`;
-
-const jsLicense = `/*!
- * reveal.js ${pkg.version}
- * ${pkg.homepage}
- * MIT licensed
- *
- * Copyright (C) 2011-2024 Hakim El Hattab, https://hakim.se
- */\n`;
+const banner = `/*!
+* reveal.js ${pkg.version}
+* ${pkg.homepage}
+* MIT licensed
+*
+* Copyright (C) 2011-2022 Hakim El Hattab, https://hakim.se
+*/\n`

 // Prevents warnings from opening too many test pages
 process.setMaxListeners(20);
@@ -94,7 +88,7 @@ gulp.task('js-es5', () => {
            name: 'Reveal',
            file: './dist/reveal.js',
            format: 'umd',
-            banner: jsLicense,
+            banner: banner,
            sourcemap: true
        });
    });
@@ -116,7 +110,7 @@ gulp.task('js-es6', () => {
        return bundle.write({
            file: './dist/reveal.esm.js',
            format: 'es',
-            banner: jsLicense,
+            banner: banner,
            sourcemap: true
        });
    });
@@ -169,12 +163,12 @@ function compileSass() {
    const transformedFile = vinylFile.clone();

    sass.render({
-        silenceDeprecations: ['legacy-js-api'],
        data: transformedFile.contents.toString(),
-        file: transformedFile.path,
+        includePaths: ['css/', 'css/theme/template']
    }, ( err, result ) => {
        if( err ) {
-            callback(err);
+            console.log( vinylFile.path );
+            console.log( err.formatted );
        }
        else {
            transformedFile.extname = '.css';
@@ -193,7 +187,7 @@ gulp.task('css-core', () => gulp.src(['css/reveal.scss'])
    .pipe(compileSass())
    .pipe(autoprefixer())
    .pipe(minify({compatibility: 'ie9'}))
-    .pipe(header(cssLicense))
+    .pipe(header(banner))
    .pipe(gulp.dest('./dist')))

 gulp.task('css', gulp.parallel('css-themes', 'css-core'))
@@ -220,7 +214,7 @@ gulp.task('qunit', () => {
                targetUrl: `http://${serverConfig.host}:${serverConfig.port}/${filename}`,
                timeout: 20000,
                redirectConsole: false,
-                puppeteerArgs: ['--allow-file-access-from-files', '--no-sandbox']
+                puppeteerArgs: ['--allow-file-access-from-files']
            })
                .then(result => {
                    if( result.stats.failed > 0 ) {
@@ -275,25 +269,24 @@ gulp.task('default', gulp.series(gulp.parallel('js', 'css', 'plugins'), 'test'))

 gulp.task('build', gulp.parallel('js', 'css', 'plugins'))

-gulp.task('package', gulp.series(async () => {
+gulp.task('package', gulp.series(() =>

-    let dirs = [
-        './index.html',
-        './dist/**',
-        './plugin/**',
-        './*/*.md'
-    ];
-
-    if (fs.existsSync('./lib')) dirs.push('./lib/**');
-    if (fs.existsSync('./images')) dirs.push('./images/**');
-    if (fs.existsSync('./slides')) dirs.push('./slides/**');
-
-    return gulp.src( dirs, { base: './', encoding: false } )
+    gulp.src(
+        [
+            './index.html',
+            './dist/**',
+            './lib/**',
+            './images/**',
+            './plugin/**',
+            './**/*.md'
+        ],
+        { base: './' }
+    )
    .pipe(zip('reveal-js-presentation.zip')).pipe(gulp.dest('./'))

-}))
+))

-gulp.task('reload', () => gulp.src(['index.html'])
+gulp.task('reload', () => gulp.src(['**/*.html', '**/*.md'])
    .pipe(connect.reload()));

 gulp.task('serve', () => {
@@ -305,19 +298,14 @@ gulp.task('serve', () => {
        livereload: true
    })

-    const slidesRoot = root.endsWith('/') ? root : root + '/'
-    gulp.watch([
-        slidesRoot + '**/*.html',
-        slidesRoot + '**/*.md',
-        `!${slidesRoot}**/node_modules/**`, // ignore node_modules
-    ], gulp.series('reload'))
+    gulp.watch(['**/*.html', '**/*.md'], 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'))

--- a/index.html
+++ b/index.html
@@ -1,5 +1,5 @@
 <!doctype html>
-<html lang="en">
+<html>
 	<head>
 		<meta charset="utf-8">
 		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
@@ -16,8 +16,7 @@
 	<body>
 		<div class="reveal">
 			<div class="slides">
-				<section>Slide 1</section>
-				<section>Slide 2</section>
+				<section data-markdown="leetcode-20230110.md"></section>
 			</div>
 		</div>

@@ -30,6 +29,8 @@
 			// - https://revealjs.com/initialization/
 			// - https://revealjs.com/config/
 			Reveal.initialize({
+				width: 1000,
+				height: 1000,
 				hash: true,

 				// Learn about plugins: https://revealjs.com/plugins/
@@ -37,4 +38,4 @@
 			});
 		</script>
 	</body>
-</html>
+</html>
--- a/js/config.js
+++ b/js/config.js
@@ -15,10 +15,7 @@ export default {
 	minScale: 0.2,
 	maxScale: 2.0,

-	// Display presentation control arrows.
-	// - true: Display controls on all screens
-	// - false: Hide controls on all screens
-	// - "speaker-only": Only display controls in the speaker view
+	// Display presentation control arrows
 	controls: true,

 	// Help the user learn the controls by providing hints, for example by
@@ -68,16 +65,13 @@ 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,

 	// Enable keyboard shortcuts for navigation
 	keyboard: true,

-	// Optional function that blocks keyboard events when returning false
+	// Optional function that blocks keyboard events when retuning false
 	//
 	// If you set this to 'focused', we will only capture keyboard events
 	// for embedded decks when they are in focus
@@ -168,9 +162,6 @@ export default {
 	// - false:  All iframes with data-src will be loaded only when visible
 	preloadIframes: null,

-	// Prevent embedded iframes from automatically focusing on themselves
-	preventIframeAutoFocus: true,
-
 	// Can be used to globally disable auto-animation
 	autoAnimate: true,

@@ -262,36 +253,6 @@ 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,
@@ -323,10 +284,6 @@ 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: [],

--- a/js/controllers/autoanimate.js
+++ b/js/controllers/autoanimate.js
@@ -31,13 +31,10 @@ export default class AutoAnimate {
 		let toSlideIndex = allSlides.indexOf( toSlide );
 		let fromSlideIndex = allSlides.indexOf( fromSlide );

-		// Ensure that;
-		// 1. Both slides exist.
-		// 2. Both slides are auto-animate targets with the same
-		//    data-auto-animate-id value (including null if absent on both).
-		// 3. data-auto-animate-restart isn't set on the physically latter
-		//    slide (independent of slide direction).
-		if( fromSlide && toSlide && fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' )
+		// Ensure that both slides are auto-animate targets with the same data-auto-animate-id value
+		// (including null if absent on both) and that data-auto-animate-restart isn't set on the
+		// physically latter slide (independent of slide direction)
+		if( fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' )
 				&& fromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) 
 				&& !( toSlideIndex > fromSlideIndex ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' ) ) {

@@ -178,12 +175,28 @@ export default class AutoAnimate {
 		let fromProps = this.getAutoAnimatableProperties( 'from', from, elementOptions ),
 			toProps = this.getAutoAnimatableProperties( 'to', to, elementOptions );

+		// Maintain fragment visibility for matching elements when
+		// we're navigating forwards, this way the viewer won't need
+		// to step through the same fragments twice
 		if( to.classList.contains( 'fragment' ) ) {

 			// Don't auto-animate the opacity of fragments to avoid
 			// conflicts with fragment animations
 			delete toProps.styles['opacity'];

+			if( from.classList.contains( 'fragment' ) ) {
+
+				let fromFragmentStyle = ( from.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];
+				let toFragmentStyle = ( to.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];
+
+				// Only skip the fragment if the fragment animation style
+				// remains unchanged
+				if( fromFragmentStyle === toFragmentStyle && animationOptions.slideDirection === 'forward' ) {
+					to.classList.add( 'visible', 'disabled' );
+				}
+
+			}
+
 		}

 		// If translation and/or scaling are enabled, css transform
@@ -448,14 +461,14 @@ export default class AutoAnimate {
 		const textNodes = 'h1, h2, h3, h4, h5, h6, p, li';
 		const mediaNodes = 'img, video, iframe';

-		// Explicit matches via data-id
+		// Eplicit matches via data-id
 		this.findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {
 			return node.nodeName + ':::' + node.getAttribute( 'data-id' );
 		} );

 		// Text
 		this.findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, node => {
-			return node.nodeName + ':::' + node.textContent.trim();
+			return node.nodeName + ':::' + node.innerText;
 		} );

 		// Media
@@ -465,7 +478,7 @@ export default class AutoAnimate {

 		// Code
 		this.findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, node => {
-			return node.nodeName + ':::' + node.textContent.trim();
+			return node.nodeName + ':::' + node.innerText;
 		} );

 		pairs.forEach( pair => {
@@ -491,7 +504,7 @@ export default class AutoAnimate {
 				} );

 				// Line numbers
-				this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-numbers[data-line-number]', node => {
+				this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-line[data-line-number]', node => {
 					return node.getAttribute( 'data-line-number' );
 				}, {
 					scale: false,
@@ -560,14 +573,14 @@ export default class AutoAnimate {

 			// Retrieve the 'from' element
 			if( fromMatches[key] ) {
-				const primaryIndex = toMatches[key].length - 1;
+				const pimaryIndex = toMatches[key].length - 1;
 				const secondaryIndex = fromMatches[key].length - 1;

 				// If there are multiple identical from elements, retrieve
 				// the one at the same index as our to-element.
-				if( fromMatches[key][ primaryIndex ] ) {
-					fromElement = fromMatches[key][ primaryIndex ];
-					fromMatches[key][ primaryIndex ] = null;
+				if( fromMatches[key][ pimaryIndex ] ) {
+					fromElement = fromMatches[key][ pimaryIndex ];
+					fromMatches[key][ pimaryIndex ] = null;
 				}
 				// If there are no matching from-elements at the same index,
 				// use the last one.
@@ -595,7 +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 considered
+	 * Note that parents of auto-animate targets are NOT considerd
 	 * unmatched since fading them would break the auto-animation.
 	 *
 	 * @param {HTMLElement} rootElement
--- a/js/controllers/backgrounds.js
+++ b/js/controllers/backgrounds.js
@@ -190,30 +190,10 @@ 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 = slide.getAttribute( 'data-background-color' );
+		let contrastColor = data.backgroundColor;

 		// If no bg color was found, or it cannot be converted by colorToRgb, check the computed background
 		if( !contrastColor || !colorToRgb( contrastColor ) ) {
@@ -231,32 +211,14 @@ export default class Backgrounds {
 			// an element with no background
 			if( rgb && rgb.a !== 0 ) {
 				if( colorBrightness( contrastColor ) < 128 ) {
-					return 'has-dark-background';
+					slide.classList.add( 'has-dark-background' );
 				}
 				else {
-					return 'has-light-background';
+					slide.classList.add( '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 );
-
 	}

 	/**
@@ -268,15 +230,14 @@ export default class Backgrounds {
 	 */
 	update( includeAll = false ) {

-		let config = this.Reveal.getConfig();
 		let currentSlide = this.Reveal.getCurrentSlide();
 		let indices = this.Reveal.getIndices();

 		let currentBackground = null;

 		// Reverse past/future classes when in RTL mode
-		let horizontalPast = config.rtl ? 'future' : 'past',
-			horizontalFuture = config.rtl ? 'past' : 'future';
+		let horizontalPast = this.Reveal.getConfig().rtl ? 'future' : 'past',
+			horizontalFuture = this.Reveal.getConfig().rtl ? 'past' : 'future';

 		// Update the classes of all backgrounds to match the
 		// states of their slides (past/present/future)
@@ -302,12 +263,10 @@ export default class Backgrounds {

 					backgroundv.classList.remove( 'past', 'present', 'future' );

-					const indexv = typeof indices.v === 'number' ? indices.v : 0;
-
-					if( v < indexv ) {
+					if( v < indices.v ) {
 						backgroundv.classList.add( 'past' );
 					}
-					else if ( v > indexv ) {
+					else if ( v > indices.v ) {
 						backgroundv.classList.add( 'future' );
 					}
 					else {
@@ -322,53 +281,15 @@ export default class Backgrounds {

 		} );

-		// The previous background may refer to a DOM element that has
-		// been removed after a presentation is synced & bgs are recreated
-		if( this.previousBackground && !this.previousBackground.closest( 'body' ) ) {
-			this.previousBackground = null;
-		}
-
-		if( currentBackground && this.previousBackground ) {
-
-			// Don't transition between identical backgrounds. This
-			// prevents unwanted flicker.
-			let previousBackgroundHash = this.previousBackground.getAttribute( 'data-background-hash' );
-			let currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );
-
-			if( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== this.previousBackground ) {
-				this.element.classList.add( 'no-transition' );
-
-				// If multiple slides have the same background video, carry
-				// the <video> element forward so that it plays continuously
-				// across multiple slides
-				const currentVideo = currentBackground.querySelector( 'video' );
-				const previousVideo = this.previousBackground.querySelector( 'video' );
-
-				if( currentVideo && previousVideo ) {
-
-					const currentVideoParent = currentVideo.parentNode;
-					const previousVideoParent = previousVideo.parentNode;
-
-					// Swap the two videos
-					previousVideoParent.appendChild( currentVideo );
-					currentVideoParent.appendChild( previousVideo );
-
-				}
-			}
-
-		}
-
-		const backgroundChanged = currentBackground !== this.previousBackground;
-
 		// Stop content inside of previous backgrounds
-		if( backgroundChanged && this.previousBackground ) {
+		if( this.previousBackground ) {

 			this.Reveal.slideContent.stopEmbeddedContent( this.previousBackground, { unloadIframes: !this.Reveal.slideContent.shouldPreload( this.previousBackground ) } );

 		}

 		// Start content in the current background
-		if( backgroundChanged && currentBackground ) {
+		if( currentBackground ) {

 			this.Reveal.slideContent.startEmbeddedContent( currentBackground );

@@ -386,6 +307,14 @@ export default class Backgrounds {

 			}

+			// Don't transition between identical backgrounds. This
+			// prevents unwanted flicker.
+			let previousBackgroundHash = this.previousBackground ? this.previousBackground.getAttribute( 'data-background-hash' ) : null;
+			let currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );
+			if( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== this.previousBackground ) {
+				this.element.classList.add( 'no-transition' );
+			}
+
 			this.previousBackground = currentBackground;

 		}
@@ -393,13 +322,20 @@ export default class Backgrounds {
 		// If there's a background brightness flag for this slide,
 		// bubble it to the .reveal container
 		if( currentSlide ) {
-			this.bubbleSlideContrastClassToElement( currentSlide, this.Reveal.getRevealElement() );
+			[ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {
+				if( currentSlide.classList.contains( classToBubble ) ) {
+					this.Reveal.getRevealElement().classList.add( classToBubble );
+				}
+				else {
+					this.Reveal.getRevealElement().classList.remove( classToBubble );
+				}
+			}, this );
 		}

 		// Allow the first background to apply without transition
 		setTimeout( () => {
 			this.element.classList.remove( 'no-transition' );
-		}, 10 );
+		}, 1 );

 	}

--- a/js/controllers/controls.js
+++ b/js/controllers/controls.js
@@ -1,4 +1,4 @@
-import { queryAll, enterFullscreen } from '../utils/util.js'
+import { queryAll } from '../utils/util.js'
 import { isAndroid } from '../utils/device.js'

 /**
@@ -12,7 +12,6 @@ import { isAndroid } from '../utils/device.js'
 * - .navigate-left
 * - .navigate-next
 * - .navigate-prev
- * - .enter-fullscreen
 */
 export default class Controls {

@@ -26,7 +25,6 @@ export default class Controls {
 		this.onNavigateDownClicked = this.onNavigateDownClicked.bind( this );
 		this.onNavigatePrevClicked = this.onNavigatePrevClicked.bind( this );
 		this.onNavigateNextClicked = this.onNavigateNextClicked.bind( this );
-		this.onEnterFullscreen = this.onEnterFullscreen.bind( this );

 	}

@@ -52,7 +50,6 @@ export default class Controls {
 		this.controlsDown = queryAll( revealElement, '.navigate-down' );
 		this.controlsPrev = queryAll( revealElement, '.navigate-prev' );
 		this.controlsNext = queryAll( revealElement, '.navigate-next' );
-		this.controlsFullscreen = queryAll( revealElement, '.enter-fullscreen' );

 		// The left, right and down arrows in the standard reveal.js controls
 		this.controlsRightArrow = this.element.querySelector( '.navigate-right' );
@@ -66,10 +63,7 @@ export default class Controls {
 	 */
 	configure( config, oldConfig ) {

-		this.element.style.display = (
-			config.controls &&
-			(config.controls !== 'speaker-only' || this.Reveal.isSpeakerNotes())
-		) ? 'block' : 'none';
+		this.element.style.display = config.controls ? 'block' : 'none';

 		this.element.setAttribute( 'data-controls-layout', config.controlsLayout );
 		this.element.setAttribute( 'data-controls-back-arrows', config.controlsBackArrows );
@@ -83,10 +77,9 @@ export default class Controls {
 		let pointerEvents = [ 'touchstart', 'click' ];

 		// Only support touch for Android, fixes double navigations in
-		// stock browser. Use touchend for it to be considered a valid
-		// user interaction (so we're allowed to autoplay media).
+		// stock browser
 		if( isAndroid ) {
-			pointerEvents = [ 'touchend' ];
+			pointerEvents = [ 'touchstart' ];
 		}

 		pointerEvents.forEach( eventName => {
@@ -96,21 +89,19 @@ export default class Controls {
 			this.controlsDown.forEach( el => el.addEventListener( eventName, this.onNavigateDownClicked, false ) );
 			this.controlsPrev.forEach( el => el.addEventListener( eventName, this.onNavigatePrevClicked, false ) );
 			this.controlsNext.forEach( el => el.addEventListener( eventName, this.onNavigateNextClicked, false ) );
-			this.controlsFullscreen.forEach( el => el.addEventListener( eventName, this.onEnterFullscreen, false ) );
 		} );

 	}

 	unbind() {

-		[ 'touchstart', 'touchend', 'click' ].forEach( eventName => {
+		[ 'touchstart', 'click' ].forEach( eventName => {
 			this.controlsLeft.forEach( el => el.removeEventListener( eventName, this.onNavigateLeftClicked, false ) );
 			this.controlsRight.forEach( el => el.removeEventListener( eventName, this.onNavigateRightClicked, false ) );
 			this.controlsUp.forEach( el => el.removeEventListener( eventName, this.onNavigateUpClicked, false ) );
 			this.controlsDown.forEach( el => el.removeEventListener( eventName, this.onNavigateDownClicked, false ) );
 			this.controlsPrev.forEach( el => el.removeEventListener( eventName, this.onNavigatePrevClicked, false ) );
 			this.controlsNext.forEach( el => el.removeEventListener( eventName, this.onNavigateNextClicked, false ) );
-			this.controlsFullscreen.forEach( el => el.removeEventListener( eventName, this.onEnterFullscreen, false ) );
 		} );

 	}
@@ -150,14 +141,9 @@ export default class Controls {
 			if( fragmentsRoutes.prev ) this.controlsPrev.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
 			if( fragmentsRoutes.next ) this.controlsNext.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );

-			const isVerticalStack = this.Reveal.isVerticalSlide( currentSlide );
-			const hasVerticalSiblings = isVerticalStack &&
-																	currentSlide.parentElement &&
-																	currentSlide.parentElement.querySelectorAll( ':scope > section' ).length > 1;
-
 			// Apply fragment decorators to directional buttons based on
 			// what slide axis they are in
-			if( isVerticalStack && hasVerticalSiblings ) {
+			if( this.Reveal.isVerticalSlide( currentSlide ) ) {
 				if( fragmentsRoutes.prev ) this.controlsUp.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
 				if( fragmentsRoutes.next ) this.controlsDown.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );
 			}
@@ -276,13 +262,5 @@ export default class Controls {

 	}

-	onEnterFullscreen( event ) {
-
-		const config = this.Reveal.getConfig();
-		const viewport = this.Reveal.getViewportElement();
-
-		enterFullscreen( config.embedded ? viewport : viewport.parentElement );
-
-	}

 }
--- a/js/controllers/fragments.js
+++ b/js/controllers/fragments.js
@@ -174,23 +174,24 @@ export default class Fragments {
 	 *
 	 * @return {{shown: array, hidden: array}}
 	 */
-	update( index, fragments, slide = this.Reveal.getCurrentSlide() ) {
+	update( index, fragments ) {

 		let changedFragments = {
 			shown: [],
 			hidden: []
 		};

-		if( slide && this.Reveal.getConfig().fragments ) {
+		let currentSlide = this.Reveal.getCurrentSlide();
+		if( currentSlide && this.Reveal.getConfig().fragments ) {

-			fragments = fragments || this.sort( slide.querySelectorAll( '.fragment' ) );
+			fragments = fragments || this.sort( currentSlide.querySelectorAll( '.fragment' ) );

 			if( fragments.length ) {

 				let maxIndex = 0;

 				if( typeof index !== 'number' ) {
-					let currentFragment = this.sort( slide.querySelectorAll( '.fragment.visible' ) ).pop();
+					let currentFragment = this.sort( currentSlide.querySelectorAll( '.fragment.visible' ) ).pop();
 					if( currentFragment ) {
 						index = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );
 					}
@@ -251,32 +252,12 @@ export default class Fragments {
 				// the current fragment index.
 				index = typeof index === 'number' ? index : -1;
 				index = Math.max( Math.min( index, maxIndex ), -1 );
-				slide.setAttribute( 'data-fragment', index );
+				currentSlide.setAttribute( 'data-fragment', index );

 			}

 		}

-		if( changedFragments.hidden.length ) {
-			this.Reveal.dispatchEvent({
-				type: 'fragmenthidden',
-				data: {
-					fragment: changedFragments.hidden[0],
-					fragments: changedFragments.hidden
-				}
-			});
-		}
-
-		if( changedFragments.shown.length ) {
-			this.Reveal.dispatchEvent({
-				type: 'fragmentshown',
-				data: {
-					fragment: changedFragments.shown[0],
-					fragments: changedFragments.shown
-				}
-			});
-		}
-
 		return changedFragments;

 	}
@@ -331,6 +312,26 @@ export default class Fragments {

 				let changedFragments = this.update( index, fragments );

+				if( changedFragments.hidden.length ) {
+					this.Reveal.dispatchEvent({
+						type: 'fragmenthidden',
+						data: {
+							fragment: changedFragments.hidden[0],
+							fragments: changedFragments.hidden
+						}
+					});
+				}
+
+				if( changedFragments.shown.length ) {
+					this.Reveal.dispatchEvent({
+						type: 'fragmentshown',
+						data: {
+							fragment: changedFragments.shown[0],
+							fragments: changedFragments.shown
+						}
+					});
+				}
+
 				this.Reveal.controls.update();
 				this.Reveal.progress.update();

--- a/js/controllers/jumptoslide.js
+++ b/js/controllers/jumptoslide.js
@@ -1,197 +0,0 @@
-import {
-	SLIDE_NUMBER_FORMAT_CURRENT,
-	SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL
-} from "../utils/constants";
-
-/**
- * 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;
-
-		let query = this.jumpInput.value.trim( '' );
-		let indices;
-
-		// When slide numbers are formatted to be a single linear number
-		// (instead of showing a separate horizontal/vertical index) we
-		// use the same format for slide jumps
-		if( /^\d+$/.test( query ) ) {
-			const slideNumberFormat = this.Reveal.getConfig().slideNumber;
-			if( slideNumberFormat === SLIDE_NUMBER_FORMAT_CURRENT || slideNumberFormat === SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL ) {
-				const slide = this.Reveal.getSlides()[ parseInt( query, 10 ) - 1 ];
-				if( slide ) {
-					indices = this.Reveal.getIndices( slide );
-				}
-			}
-		}
-
-		if( !indices ) {
-			// If the query uses "horizontal.vertical" format, convert to
-			// "horizontal/vertical" so that our URL parser can understand
-			if( /^\d+\.\d+$/.test( query ) ) {
-				query = query.replace( '.', '/' );
-			}
-
-			indices = this.Reveal.location.getIndicesFromHash( query, { oneBasedIndex: true } );
-		}
-
-		// Still no valid index? Fall back on a text 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 );
-
-	}
-
-}
--- a/js/controllers/keyboard.js
+++ b/js/controllers/keyboard.js
@@ -17,6 +17,7 @@ export default class Keyboard {
 		this.bindings = {};

 		this.onDocumentKeyDown = this.onDocumentKeyDown.bind( this );
+		this.onDocumentKeyPress = this.onDocumentKeyPress.bind( this );

 	}

@@ -42,7 +43,6 @@ export default class Keyboard {
 		this.shortcuts['Shift + &#8592;/&#8593/&#8594;/&#8595;']      = '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';

 	}
@@ -53,6 +53,7 @@ export default class Keyboard {
 	bind() {

 		document.addEventListener( 'keydown', this.onDocumentKeyDown, false );
+		document.addEventListener( 'keypress', this.onDocumentKeyPress, false );

 	}

@@ -62,6 +63,7 @@ export default class Keyboard {
 	unbind() {

 		document.removeEventListener( 'keydown', this.onDocumentKeyDown, false );
+		document.removeEventListener( 'keypress', this.onDocumentKeyPress, false );

 	}

@@ -132,6 +134,20 @@ 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.
 	 *
@@ -167,10 +183,10 @@ 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 keyCodeUsesModifier = [32, 37, 38, 39, 40, 63, 78, 80, 191].indexOf( event.keyCode ) !== -1;
+		let isNavigationKey = [32, 37, 38, 39, 40, 78, 80].indexOf( event.keyCode ) !== -1;

 		// Prevent all other events when a modifier is pressed
-		let unusedModifier = 	!( keyCodeUsesModifier && event.shiftKey || event.altKey ) &&
+		let unusedModifier = 	!( isNavigationKey && event.shiftKey || event.altKey ) &&
 								( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );

 		// Disregard the event if there's a focused element or a
@@ -178,7 +194,7 @@ export default class Keyboard {
 		if( activeElementIsCE || activeElementIsInput || activeElementIsNotes || unusedModifier ) return;

 		// While paused only allow resume keyboard events; 'b', 'v', '.'
-		let resumeKeyCodes = [66,86,190,191,112];
+		let resumeKeyCodes = [66,86,190,191];
 		let key;

 		// Custom key bindings for togglePause should be able to resume
@@ -190,10 +206,6 @@ export default class Keyboard {
 			}
 		}

-		if( this.Reveal.isOverlayOpen() && !["Escape", "f", "c", "b", "."].includes(event.key) ) {
-			return false;
-		}
-
 		if( this.Reveal.isPaused() && resumeKeyCodes.indexOf( keyCode ) === -1 ) {
 			return false;
 		}
@@ -275,12 +287,7 @@ export default class Keyboard {
 					this.Reveal.slide( 0 );
 				}
 				else if( !this.Reveal.overview.isActive() && useLinearMode ) {
-					if( config.rtl ) {
-						this.Reveal.next({skipFragments: event.altKey});
-					}
-					else {
-						this.Reveal.prev({skipFragments: event.altKey});
-					}
+					this.Reveal.prev({skipFragments: event.altKey});
 				}
 				else {
 					this.Reveal.left({skipFragments: event.altKey});
@@ -292,12 +299,7 @@ export default class Keyboard {
 					this.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );
 				}
 				else if( !this.Reveal.overview.isActive() && useLinearMode ) {
-					if( config.rtl ) {
-						this.Reveal.prev({skipFragments: event.altKey});
-					}
-					else {
-						this.Reveal.next({skipFragments: event.altKey});
-					}
+					this.Reveal.next({skipFragments: event.altKey});
 				}
 				else {
 					this.Reveal.right({skipFragments: event.altKey});
@@ -348,7 +350,7 @@ export default class Keyboard {
 				}
 			}
 			// TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS "BLACK SCREEN" BUTTON
-			else if( [58, 59, 66, 86, 190].includes( keyCode ) || ( keyCode === 191 && !event.shiftKey ) ) {
+			else if( keyCode === 58 || keyCode === 59 || keyCode === 66 || keyCode === 86 || keyCode === 190 || keyCode === 191 ) {
 				this.Reveal.togglePause();
 			}
 			// F
@@ -357,28 +359,10 @@ export default class Keyboard {
 			}
 			// A
 			else if( keyCode === 65 ) {
-				if( config.autoSlideStoppable ) {
+				if ( config.autoSlideStoppable ) {
 					this.Reveal.toggleAutoSlide( autoSlideWasPaused );
 				}
 			}
-			// G
-			else if( keyCode === 71 ) {
-				if( config.jumpToSlide ) {
-					this.Reveal.toggleJumpToSlide();
-				}
-			}
-			// C
-			else if( keyCode === 67 && this.Reveal.isOverlayOpen() ) {
-				this.Reveal.closeOverlay();
-			}
-			// ?
-			else if( ( keyCode === 63 || keyCode === 191 ) && event.shiftKey ) {
-				this.Reveal.toggleHelp();
-			}
-			// F1
-			else if( keyCode === 112 ) {
-				this.Reveal.toggleHelp();
-			}
 			else {
 				triggered = false;
 			}
@@ -398,12 +382,6 @@ export default class Keyboard {

 			event.preventDefault && event.preventDefault();
 		}
-		
-		// Enter to exit overview mode
-		else if (keyCode === 13 && this.Reveal.overview.isActive()) {
-			this.Reveal.overview.deactivate();
-			event.preventDefault && event.preventDefault();
-		}

 		// If auto-sliding is enabled we need to cue up
 		// another timeout
@@ -411,4 +389,4 @@ export default class Keyboard {

 	}

-}
+}
--- a/js/controllers/location.js
+++ b/js/controllers/location.js
@@ -40,7 +40,7 @@ export default class Location {
 	 *
 	 * @returns slide indices or null
 	 */
-	getIndicesFromHash( hash=window.location.hash, options={} ) {
+	getIndicesFromHash( hash=window.location.hash ) {

 		// 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 slide;
+			let element;

 			let f;

@@ -60,23 +60,19 @@ export default class Location {
 				name = name.split( '/' ).shift();
 			}

-			// Ensure the named link is a valid HTML id or data-id attribute
+			// Ensure the named link is a valid HTML ID attribute
 			try {
-				const decodedName = decodeURIComponent( name );
-				slide = (
-					document.getElementById( decodedName ) ||
-					document.querySelector( `[data-id="${decodedName}"]` )
-				).closest('.slides section');
+				element = document.getElementById( decodeURIComponent( name ) );
 			}
 			catch ( error ) { }

-			if( slide ) {
-				return { ...this.Reveal.getIndices( slide ), f };
+			if( element ) {
+				return { ...this.Reveal.getIndices( element ), f };
 			}
 		}
 		else {
 			const config = this.Reveal.getConfig();
-			let hashIndexBase = config.hashOneBasedIndex || options.oneBasedIndex ? 1 : 0;
+			let hashIndexBase = config.hashOneBasedIndex ? 1 : 0;

 			// Read the index components of the hash
 			let h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,
@@ -143,7 +139,7 @@ export default class Location {
 			let hash = this.getHash();

 			// If we're configured to push to history OR the history
-			// API is not available.
+			// API is not avaialble.
 			if( config.history ) {
 				window.location.hash = hash;
 			}
--- a/js/controllers/notes.js
+++ b/js/controllers/notes.js
@@ -38,12 +38,10 @@ export default class Notes {
 	 */
 	update() {

-		if( this.Reveal.getConfig().showNotes &&
-			this.element && this.Reveal.getCurrentSlide() &&
-			!this.Reveal.isScrollView() &&
-			!this.Reveal.isPrintView()
-		) {
+		if( this.Reveal.getConfig().showNotes && this.element && this.Reveal.getCurrentSlide() && !this.Reveal.print.isPrintingPDF() ) {
+
 			this.element.innerHTML = this.getSlideNotes() || '<span class="notes-placeholder">No notes on this slide.</span>';
+
 		}

 	}
@@ -56,11 +54,7 @@ export default class Notes {
 	 */
 	updateVisibility() {

-		if( this.Reveal.getConfig().showNotes &&
-			this.hasNotes() &&
-			!this.Reveal.isScrollView() &&
-			!this.Reveal.isPrintView()
-		) {
+		if( this.Reveal.getConfig().showNotes && this.hasNotes() && !this.Reveal.print.isPrintingPDF() ) {
 			this.Reveal.getRevealElement().classList.add( 'show-notes' );
 		}
 		else {
--- a/js/controllers/overlay.js
+++ b/js/controllers/overlay.js
@@ -1,389 +0,0 @@
-/**
- * Handles the display of reveal.js' overlay elements used
- * to preview iframes, images & videos.
- */
-export default class Overlay {
-
-	constructor( Reveal ) {
-
-		this.Reveal = Reveal;
-
-		this.onSlidesClicked = this.onSlidesClicked.bind( this );
-
-		this.iframeTriggerSelector = null;
-		this.mediaTriggerSelector = '[data-preview-image], [data-preview-video]';
-
-		this.stateProps = ['previewIframe', 'previewImage', 'previewVideo', 'previewFit'];
-		this.state = {};
-
-	}
-
-	update() {
-
-		// Enable link previews globally
-		if( this.Reveal.getConfig().previewLinks ) {
-			this.iframeTriggerSelector = 'a[href]:not([data-preview-link=false]), [data-preview-link]:not(a):not([data-preview-link=false])';
-		}
-		// Enable link previews for individual elements
-		else {
-			this.iframeTriggerSelector = '[data-preview-link]:not([data-preview-link=false])';
-		}
-
-		const hasLinkPreviews = this.Reveal.getSlidesElement().querySelectorAll( this.iframeTriggerSelector ).length > 0;
-		const hasMediaPreviews = this.Reveal.getSlidesElement().querySelectorAll( this.mediaTriggerSelector ).length > 0;
-
-		// Only add the listener when there are previewable elements in the slides
-		if( hasLinkPreviews || hasMediaPreviews ) {
-			this.Reveal.getSlidesElement().addEventListener( 'click', this.onSlidesClicked, false );
-		}
-		else {
-			this.Reveal.getSlidesElement().removeEventListener( 'click', this.onSlidesClicked, false );
-		}
-
-	}
-
-	createOverlay( className ) {
-
-		this.dom = document.createElement( 'div' );
-		this.dom.classList.add( 'r-overlay' );
-		this.dom.classList.add( className );
-
-		this.viewport = document.createElement( 'div' );
-		this.viewport.classList.add( 'r-overlay-viewport' );
-
-		this.dom.appendChild( this.viewport );
-		this.Reveal.getRevealElement().appendChild( this.dom );
-
-	}
-
-	/**
-	 * Opens a lightbox that previews the target URL.
-	 *
-	 * @param {string} url - url for lightbox iframe src
-	 */
-	previewIframe( url ) {
-
-		this.close();
-
-		this.state = { previewIframe: url };
-
-		this.createOverlay( 'r-overlay-preview' );
-		this.dom.dataset.state = 'loading';
-
-		this.viewport.innerHTML =
-			`<header class="r-overlay-header">
-				<a class="r-overlay-button r-overlay-external" href="${url}" target="_blank"><span class="icon"></span></a>
-				<button class="r-overlay-button r-overlay-close"><span class="icon"></span></button>
-			</header>
-			<div class="r-overlay-spinner"></div>
-			<div class="r-overlay-content">
-				<iframe src="${url}"></iframe>
-				<small class="r-overlay-content-inner">
-					<span class="r-overlay-error x-frame-error">Unable to load iframe. This is likely due to the site's policy (x-frame-options).</span>
-				</small>
-			</div>`;
-
-		this.dom.querySelector( 'iframe' ).addEventListener( 'load', event => {
-			this.dom.dataset.state = 'loaded';
-		}, false );
-
-		this.dom.querySelector( '.r-overlay-close' ).addEventListener( 'click', event => {
-			this.close();
-			event.preventDefault();
-		}, false );
-
-		this.dom.querySelector( '.r-overlay-external' ).addEventListener( 'click', event => {
-			this.close();
-		}, false );
-
-		this.Reveal.dispatchEvent({ type: 'previewiframe', data: { url } });
-
-	}
-
-	/**
-	 * Opens a lightbox window that provides a larger view of the
-	 * given image/video.
-	 *
-	 * @param {string} url - url to the image/video to preview
-	 * @param {image|video} mediaType
-	 * @param {string} [fitMode] - the fit mode to use for the preview
-	 */
-	previewMedia( url, mediaType, fitMode ) {
-
-		if( mediaType !== 'image' && mediaType !== 'video' ) {
-			console.warn( 'Please specify a valid media type to preview (image|video)' );
-			return;
-		}
-
-		this.close();
-
-		fitMode = fitMode || 'scale-down';
-
-		this.createOverlay( 'r-overlay-preview' );
-		this.dom.dataset.state = 'loading';
-		this.dom.dataset.previewFit = fitMode;
-
-		this.viewport.innerHTML =
-			`<header class="r-overlay-header">
-				<button class="r-overlay-button r-overlay-close">Esc <span class="icon"></span></button>
-			</header>
-			<div class="r-overlay-spinner"></div>
-			<div class="r-overlay-content"></div>`;
-
-		const contentElement = this.dom.querySelector( '.r-overlay-content' );
-
-		if( mediaType === 'image' ) {
-
-			this.state = { previewImage: url, previewFit: fitMode }
-
-			const img = document.createElement( 'img', {} );
-			img.src = url;
-			contentElement.appendChild( img );
-
-			img.addEventListener( 'load', () => {
-				this.dom.dataset.state = 'loaded';
-			}, false );
-
-			img.addEventListener( 'error', () => {
-				this.dom.dataset.state = 'error';
-				contentElement.innerHTML =
-						`<span class="r-overlay-error">Unable to load image.</span>`
-			}, false );
-
-			// Hide image overlays when clicking outside the overlay
-			this.dom.style.cursor = 'zoom-out';
-			this.dom.addEventListener( 'click', ( event ) => {
-				this.close();
-			}, false );
-
-			this.Reveal.dispatchEvent({ type: 'previewimage', data: { url } });
-
-		}
-		else if( mediaType === 'video' ) {
-
-			this.state = { previewVideo: url, previewFit: fitMode }
-
-			const video = document.createElement( 'video' );
-			video.autoplay = this.dom.dataset.previewAutoplay === 'false' ? false : true;
-			video.controls = this.dom.dataset.previewControls === 'false' ? false : true;
-			video.loop = this.dom.dataset.previewLoop === 'true' ? true : false;
-			video.muted = this.dom.dataset.previewMuted === 'true' ? true : false;
-			video.playsInline = true;
-			video.src = url;
-			contentElement.appendChild( video );
-
-			video.addEventListener( 'loadeddata', () => {
-				this.dom.dataset.state = 'loaded';
-			}, false );
-
-			video.addEventListener( 'error', () => {
-				this.dom.dataset.state = 'error';
-				contentElement.innerHTML =
-					`<span class="r-overlay-error">Unable to load video.</span>`;
-			}, false );
-
-			this.Reveal.dispatchEvent({ type: 'previewvideo', data: { url } });
-
-		}
-		else {
-			throw new Error( 'Please specify a valid media type to preview' );
-		}
-
-		this.dom.querySelector( '.r-overlay-close' ).addEventListener( 'click', ( event ) => {
-			this.close();
-			event.preventDefault();
-		}, false );
-
-	}
-
-	previewImage( url, fitMode ) {
-
-		this.previewMedia( url, 'image', fitMode );
-
-	}
-
-	previewVideo( url, fitMode ) {
-
-		this.previewMedia( url, 'video', fitMode );
-
-	}
-
-	/**
-	 * Open or close help overlay window.
-	 *
-	 * @param {Boolean} [override] Flag which overrides the
-	 * toggle logic and forcibly sets the desired state. True means
-	 * help is open, false means it's closed.
-	 */
-	toggleHelp( override ) {
-
-		if( typeof override === 'boolean' ) {
-			override ? this.showHelp() : this.close();
-		}
-		else {
-			if( this.dom ) {
-				this.close();
-			}
-			else {
-				this.showHelp();
-			}
-		}
-	}
-
-	/**
-	 * Opens an overlay window with help material.
-	 */
-	showHelp() {
-
-		if( this.Reveal.getConfig().help ) {
-
-			this.close();
-
-			this.createOverlay( 'r-overlay-help' );
-
-			let html = '<p class="title">Keyboard Shortcuts</p>';
-
-			let shortcuts = this.Reveal.keyboard.getShortcuts(),
-				bindings = this.Reveal.keyboard.getBindings();
-
-			html += '<table><th>KEY</th><th>ACTION</th>';
-			for( let key in shortcuts ) {
-				html += `<tr><td>${key}</td><td>${shortcuts[ key ]}</td></tr>`;
-			}
-
-			// Add custom key bindings that have associated descriptions
-			for( let binding in bindings ) {
-				if( bindings[binding].key && bindings[binding].description ) {
-					html += `<tr><td>${bindings[binding].key}</td><td>${bindings[binding].description}</td></tr>`;
-				}
-			}
-
-			html += '</table>';
-
-			this.viewport.innerHTML = `
-				<header class="r-overlay-header">
-					<button class="r-overlay-button r-overlay-close">Esc <span class="icon"></span></button>
-				</header>
-				<div class="r-overlay-content">
-					<div class="r-overlay-help-content">${html}</div>
-				</div>
-			`;
-
-			this.dom.querySelector( '.r-overlay-close' ).addEventListener( 'click', event => {
-				this.close();
-				event.preventDefault();
-			}, false );
-
-			this.Reveal.dispatchEvent({ type: 'showhelp' });
-
-		}
-
-	}
-
-	isOpen() {
-
-		return !!this.dom;
-
-	}
-
-	/**
-	 * Closes any currently open overlay.
-	 */
-	close() {
-
-		if( this.dom ) {
-			this.dom.remove();
-			this.dom = null;
-
-			this.state = {};
-
-			this.Reveal.dispatchEvent({ type: 'closeoverlay' });
-
-			return true;
-		}
-
-		return false;
-
-	}
-
-	getState() {
-
-		return this.state;
-
-	}
-
-	setState( state ) {
-
-		// Ignore the incoming state if none of the preview related
-		// props have changed
-		if( this.stateProps.every( key => this.state[ key ] === state[ key ] ) ) {
-			return;
-		}
-
-		if( state.previewIframe ) {
-			this.previewIframe( state.previewIframe );
-		}
-		else if( state.previewImage ) {
-			this.previewImage( state.previewImage, state.previewFit );
-		}
-		else if( state.previewVideo ) {
-			this.previewVideo( state.previewVideo, state.previewFit );
-		}
-		else {
-			this.close();
-		}
-
-	}
-
-	onSlidesClicked( event ) {
-
-		const target = event.target;
-
-		const linkTarget = target.closest( this.iframeTriggerSelector );
-		const mediaTarget = target.closest( this.mediaTriggerSelector );
-
-		// Was an iframe lightbox trigger clicked?
-		if( linkTarget ) {
-			if( event.metaKey || event.shiftKey || event.altKey ) {
-				// Let the browser handle meta keys naturally so users can cmd+click
-				return;
-			}
-			let url = linkTarget.getAttribute( 'href' ) || linkTarget.getAttribute( 'data-preview-link' );
-			if( url ) {
-				this.previewIframe( url );
-				event.preventDefault();
-			}
-		}
-		// Was a media lightbox trigger clicked?
-		else if( mediaTarget ) {
-			if( mediaTarget.hasAttribute( 'data-preview-image' ) ) {
-				let url = mediaTarget.dataset.previewImage || mediaTarget.getAttribute( 'src' );
-				if( url ) {
-					this.previewImage( url, mediaTarget.dataset.previewFit );
-					event.preventDefault();
-				}
-			}
-			else if( mediaTarget.hasAttribute( 'data-preview-video' ) ) {
-				let url = mediaTarget.dataset.previewVideo || mediaTarget.getAttribute( 'src' );
-				if( !url ) {
-					let source = mediaTarget.querySelector( 'source' );
-					if( source ) {
-						url = source.getAttribute( 'src' );
-					}
-				}
-				if( url ) {
-					this.previewVideo( url, mediaTarget.dataset.previewFit );
-					event.preventDefault();
-				}
-			}
-		}
-
-	}
-
-	destroy() {
-
-		this.close();
-
-	}
-
-}
--- a/js/controllers/overview.js
+++ b/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.Reveal.isScrollView() && !this.isActive() ) {
+		if( this.Reveal.getConfig().overview && !this.isActive() ) {

 			this.active = true;

--- a/js/controllers/plugins.js
+++ b/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 registered plugins
+		// An id:instance map of currently registed 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 registered plugins to initialize
+	 * reveal.js waits for all regisered plugins to initialize
 	 * before considering itself ready, as long as the plugin
 	 * is registered before calling `Reveal.initialize()`.
 	 */
--- a/js/controllers/pointer.js
+++ b/js/controllers/pointer.js
@@ -27,10 +27,12 @@ export default class Pointer {
 	configure( config, oldConfig ) {

 		if( config.mouseWheel ) {
-			document.addEventListener( 'wheel', this.onDocumentMouseScroll, false );
+			document.addEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false ); // FF
+			document.addEventListener( 'mousewheel', this.onDocumentMouseScroll, false );
 		}
 		else {
-			document.removeEventListener( 'wheel', this.onDocumentMouseScroll, false );
+			document.removeEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false ); // FF
+			document.removeEventListener( 'mousewheel', this.onDocumentMouseScroll, false );
 		}

 		// Auto-hide the mouse pointer when its inactive
@@ -77,7 +79,8 @@ export default class Pointer {

 		this.showCursor();

-		document.removeEventListener( 'wheel', this.onDocumentMouseScroll, false );
+		document.removeEventListener( 'DOMMouseScroll', this.onDocumentMouseScroll, false );
+		document.removeEventListener( 'mousewheel', this.onDocumentMouseScroll, false );
 		document.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );
 		document.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );

@@ -123,4 +126,4 @@ export default class Pointer {

 	}

-}
+}
--- a/js/controllers/printview.js
+++ b/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 PrintView {
+export default class Print {

 	constructor( Reveal ) {

@@ -16,7 +16,7 @@ export default class PrintView {
 	 * Configures the presentation for printing to a static
 	 * PDF.
 	 */
-	async activate() {
+	async setupPDF() {

 		const config = this.Reveal.getConfig();
 		const slides = queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR )
@@ -42,11 +42,11 @@ export default class PrintView {
 		// 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( 'reveal-print', 'print-pdf' );
+		document.documentElement.classList.add( 'print-pdf' );
 		document.body.style.width = pageWidth + 'px';
 		document.body.style.height = pageHeight + 'px';

-		const viewportElement = this.Reveal.getViewportElement();
+		const viewportElement = document.querySelector( '.reveal-viewport' );
 		let presentationBackground;
 		if( viewportElement ) {
 			const viewportStyles = window.getComputedStyle( viewportElement );
@@ -223,17 +223,15 @@ export default class PrintView {
 		// Notify subscribers that the PDF layout is good to go
 		this.Reveal.dispatchEvent({ type: 'pdf-ready' });

-		viewportElement.classList.remove( 'loading-scroll-mode' );
-
 	}

 	/**
-	 * Checks if the print mode is/should be activated.
+	 * Checks if this instance is being used to print a PDF.
 	 */
-	isActive() {
+	isPrintingPDF() {

-		return this.Reveal.getConfig().view === 'print';
+		return ( /print-pdf/gi ).test( window.location.search );

 	}

-}
+}
--- a/js/controllers/scrollview.js
+++ b/js/controllers/scrollview.js
@@ -1,923 +0,0 @@
-import { HORIZONTAL_SLIDES_SELECTOR, HORIZONTAL_BACKGROUNDS_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 );
-		const horizontalBackgrounds = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_BACKGROUNDS_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, isVertical ) => {
-
-			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 );
-
-				// This transfers over the background of the vertical stack containing
-				// the slide if it exists. Otherwise, it uses the presentation-wide
-				// background.
-				if( isVertical && horizontalBackgrounds.length > h ) {
-					const slideBackground = horizontalBackgrounds[h];
-					const pageBackground = window.getComputedStyle( slideBackground );
-
-					if( pageBackground && pageBackground.background ) {
-						page.style.background = pageBackground.background;
-					}
-					else if( presentationBackground ) {
-						page.style.background = presentationBackground;
-					}
-				} else 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, true );
-				});
-			}
-			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
-		this.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 = this.scrollTriggerHeight + 'px';
-				triggerStick.style.scrollSnapAlign = useCompactLayout ? 'center' : 'start';
-				page.pageElement.appendChild( triggerStick );
-
-				if( i === 0 ) {
-					triggerStick.style.marginTop = -this.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 = this.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];
-		} );
-
-		// Ensure the last trigger extends to the end of the page, otherwise
-		// rounding errors can cause the last trigger to end at 0.999999...
-		this.slideTriggers[this.slideTriggers.length - 1].range[1] = 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.forEach( ( fragments, i ) => {
-				page.scrollTriggers.push({
-					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 );
-
-		}
-
-	}
-
-	/**
-	 * Scroll to the previous page.
-	 */
-	prev() {
-
-		this.viewportElement.scrollTop -= this.scrollTriggerHeight;
-
-	}
-
-	/**
-	 * Scroll to the next page.
-	 */
-	next() {
-
-		this.viewportElement.scrollTop += this.scrollTriggerHeight;
-
-	}
-
-	/**
-	 * 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;
-			if( page.slideElement ) page.slideElement.classList.remove( 'present' );
-			if( page.backgroundElement ) 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();
-
-	}
-
-}
--- a/js/controllers/slidecontent.js
+++ b/js/controllers/slidecontent.js
@@ -1,4 +1,4 @@
-import { extend, queryAll, closest, getMimeTypeFromFile, encodeRFC3986URI } from '../utils/util.js'
+import { extend, queryAll, closest, getMimeTypeFromFile } from '../utils/util.js'
 import { isMobile } from '../utils/device.js'

 import fitty from 'fitty';
@@ -9,15 +9,11 @@ import fitty from 'fitty';
 */
 export default class SlideContent {

-	allowedToPlay = true;
-
 	constructor( Reveal ) {

 		this.Reveal = Reveal;

 		this.startEmbeddedIframe = this.startEmbeddedIframe.bind( this );
-		this.preventIframeAutoFocus = this.preventIframeAutoFocus.bind( this );
-		this.ensureMobileMediaPlaying = this.ensureMobileMediaPlaying.bind( this );

 	}

@@ -29,10 +25,6 @@ export default class SlideContent {
 	 */
 	shouldPreload( element ) {

-		if( this.Reveal.isScrollView() ) {
-			return true;
-		}
-
 		// Prefer an explicit global preload setting
 		let preload = this.Reveal.getConfig().preloadIframes;

@@ -55,25 +47,14 @@ export default class SlideContent {
 	load( slide, options = {} ) {

 		// Show the slide element
-		const displayValue = this.Reveal.getConfig().display;
-		if( displayValue.includes('!important') ) {
-			const value = displayValue.replace(/\s*!important\s*$/, '').trim();
-			slide.style.setProperty('display', value, 'important');
-		} else {
-			slide.style.display = displayValue;
-		}
+		slide.style.display = this.Reveal.getConfig().display;

-		// Media and iframe elements with data-src attributes
+		// Media elements with data-src attributes
 		queryAll( slide, 'img[data-src], video[data-src], audio[data-src], iframe[data-src]' ).forEach( element => {
-			const isIframe = element.tagName === 'IFRAME';
-			if( !isIframe || this.shouldPreload( element ) ) {
+			if( element.tagName !== 'IFRAME' || this.shouldPreload( element ) ) {
 				element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
 				element.setAttribute( 'data-lazy-loaded', '' );
 				element.removeAttribute( 'data-src' );
-
-				if( isIframe ) {
-					element.addEventListener( 'load', this.preventIframeAutoFocus );
-				}
 			}
 		} );

@@ -127,21 +108,19 @@ export default class SlideContent {
 					// URL(s)
 					else {
 						backgroundContent.style.backgroundImage = backgroundImage.split( ',' ).map( background => {
-							// Decode URL(s) that are already encoded first
-							let decoded = decodeURI(background.trim());
-							return `url(${encodeRFC3986URI(decoded)})`;
+							return `url(${encodeURI(background.trim())})`;
 						}).join( ',' );
 					}
 				}
 				// Videos
-				else if ( backgroundVideo ) {
+				else if ( backgroundVideo && !this.Reveal.isSpeakerNotes() ) {
 					let video = document.createElement( 'video' );

 					if( backgroundVideoLoop ) {
 						video.setAttribute( 'loop', '' );
 					}

-					if( backgroundVideoMuted || this.Reveal.isSpeakerNotes() ) {
+					if( backgroundVideoMuted ) {
 						video.muted = true;
 					}

@@ -157,15 +136,13 @@ export default class SlideContent {

 					// Support comma separated lists of video sources
 					backgroundVideo.split( ',' ).forEach( source => {
-						const sourceElement = document.createElement( 'source' );
-						sourceElement.setAttribute( 'src', source );
-
 						let type = getMimeTypeFromFile( source );
 						if( type ) {
-							sourceElement.setAttribute( 'type', type );
+							video.innerHTML += `<source src="${source}" type="${type}">`;
+						}
+						else {
+							video.innerHTML += `<source src="${source}">`;
 						}
-
-						video.appendChild( sourceElement );
 					} );

 					backgroundContent.appendChild( video );
@@ -295,9 +272,7 @@ export default class SlideContent {
 	 */
 	startEmbeddedContent( element ) {

-		if( element ) {
-
-			const isSpeakerNotesWindow = this.Reveal.isSpeakerNotes();
+		if( element && !this.Reveal.isSpeakerNotes() ) {

 			// Restart GIFs
 			queryAll( element, 'img[src$=".gif"]' ).forEach( el => {
@@ -323,9 +298,6 @@ export default class SlideContent {

 				if( autoplay && typeof el.play === 'function' ) {

-					// In the speaker view we only auto-play muted media
-					if( isSpeakerNotesWindow && !el.muted ) return;
-
 					// If the media is ready, start playback
 					if( el.readyState > 1 ) {
 						this.startEmbeddedMedia( { target: el } );
@@ -335,16 +307,10 @@ export default class SlideContent {
 					else if( isMobile ) {
 						let promise = el.play();

-						el.addEventListener( 'canplay', this.ensureMobileMediaPlaying );
-
 						// If autoplay does not work, ensure that the controls are visible so
 						// that the viewer can start the media on their own
 						if( promise && typeof promise.catch === 'function' && el.controls === false ) {
-							promise
-							.then( () => {
-								this.allowedToPlay = true;
-							})
-							.catch( () => {
+							promise.catch( () => {
 								el.controls = true;

 								// Once the video does start playing, hide the controls again
@@ -363,72 +329,32 @@ export default class SlideContent {
 				}
 			} );

-			// Don't play iframe content in the speaker view since we can't
-			// guarantee that it's muted
-			if( !isSpeakerNotesWindow ) {
+			// Normal iframes
+			queryAll( element, 'iframe[src]' ).forEach( el => {
+				if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
+					return;
+				}

-				// Normal iframes
-				queryAll( element, 'iframe[src]' ).forEach( el => {
-					if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
-						return;
-					}
+				this.startEmbeddedIframe( { target: el } );
+			} );

-					this.startEmbeddedIframe( { target: el } );
-				} );
+			// Lazy loading iframes
+			queryAll( element, 'iframe[data-src]' ).forEach( el => {
+				if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
+					return;
+				}

-				// Lazy loading iframes
-				queryAll( element, 'iframe[data-src]' ).forEach( el => {
-					if( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {
-						return;
-					}
-
-					if( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {
-						el.removeEventListener( 'load', this.startEmbeddedIframe ); // remove first to avoid dupes
-						el.addEventListener( 'load', this.startEmbeddedIframe );
-						el.setAttribute( 'src', el.getAttribute( 'data-src' ) );
-					}
-				} );
-
-			}
+				if( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {
+					el.removeEventListener( 'load', this.startEmbeddedIframe ); // remove first to avoid dupes
+					el.addEventListener( 'load', this.startEmbeddedIframe );
+					el.setAttribute( 'src', el.getAttribute( 'data-src' ) );
+				}
+			} );

 		}

 	}

-	/**
-	 * Ensure that an HTMLMediaElement is playing on mobile devices.
-	 *
-	 * This is a workaround for a bug in mobile Safari where
-	 * the media fails to display if many videos are started
-	 * at the same moment. When this happens, Mobile Safari
-	 * reports the video is playing, and the current time
-	 * advances, but nothing is visible.
-	 *
-	 * @param {Event} event
-	 */
-	ensureMobileMediaPlaying( event ) {
-
-		const el = event.target;
-
-		// Ignore this check incompatible browsers
-		if( typeof el.getVideoPlaybackQuality !== 'function' ) {
-			return;
-		}
-
-		setTimeout( () => {
-
-			const playing = el.paused === false;
-			const totalFrames = el.getVideoPlaybackQuality().totalVideoFrames;
-
-			if( playing && totalFrames === 0 ) {
-				el.load();
-				el.play();
-			}
-
-		}, 1000 );
-
-	}
-
 	/**
 	 * Starts playing an embedded video/audio element after
 	 * it has finished loading.
@@ -441,23 +367,8 @@ export default class SlideContent {
 			isVisible  		= !!closest( event.target, '.present' );

 		if( isAttachedToDOM && isVisible ) {
-			// Don't restart if media is already playing
-			if( event.target.paused || event.target.ended ) {
-				event.target.currentTime = 0;
-				const promise = event.target.play();
-
-				if( promise && typeof promise.catch === 'function' ) {
-					promise
-						.then( () => {
-							this.allowedToPlay = true;
-						} )
-						.catch( ( error ) => {
-							if( error.name === 'NotAllowedError' ) {
-								this.allowedToPlay = false;
-							}
-						} );
-				}
-			}
+			event.target.currentTime = 0;
+			event.target.play();
 		}

 		event.target.removeEventListener( 'loadeddata', this.startEmbeddedMedia );
@@ -474,8 +385,6 @@ export default class SlideContent {

 		let iframe = event.target;

-		this.preventIframeAutoFocus( event );
-
 		if( iframe && iframe.contentWindow ) {

 			let isAttachedToDOM = !!closest( event.target, 'html' ),
@@ -530,17 +439,12 @@ export default class SlideContent {
 				if( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {
 					el.setAttribute('data-paused-by-reveal', '');
 					el.pause();
-
-					if( isMobile ) {
-						el.removeEventListener( 'canplay', this.ensureMobileMediaPlaying );
-					}
 				}
 			} );

 			// Generic postMessage API for non-lazy loaded iframes
 			queryAll( element, 'iframe' ).forEach( el => {
 				if( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );
-				el.removeEventListener( 'load', this.preventIframeAutoFocus );
 				el.removeEventListener( 'load', this.startEmbeddedIframe );
 			});

@@ -571,46 +475,4 @@ export default class SlideContent {

 	}

-	/**
-	 * Checks whether media playback is blocked by the browser. This
-	 * typically happens when media playback is initiated without a
-	 * direct user interaction.
-	 */
-	isNotAllowedToPlay() {
-
-		return !this.allowedToPlay;
-
-	}
-
-	/**
-	 * Prevents iframes from automatically focusing themselves.
-	 *
-	 * @param {Event} event
-	 */
-	preventIframeAutoFocus( event ) {
-
-		const iframe = event.target;
-
-		console.log(111)
-
-		if( iframe && this.Reveal.getConfig().preventIframeAutoFocus ) {
-
-			let elapsed = 0;
-			const interval = 100;
-			const maxTime = 1000;
-			const checkFocus = () => {
-				if( document.activeElement === iframe ) {
-					document.activeElement.blur();
-				} else if( elapsed < maxTime ) {
-					elapsed += interval;
-					setTimeout( checkFocus, interval );
-				}
-			};
-
-			setTimeout( checkFocus, interval );
-
-		}
-
-	}
-
 }
--- a/js/controllers/slidenumber.js
+++ b/js/controllers/slidenumber.js
@@ -1,10 +1,3 @@
-import {
-	SLIDE_NUMBER_FORMAT_CURRENT,
-	SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL,
-	SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL,
-	SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL
-} from "../utils/constants";
-
 /**
 * Handles the display of reveal.js' optional slide number.
 */
@@ -30,7 +23,7 @@ export default class SlideNumber {
 	configure( config, oldConfig ) {

 		let slideNumberDisplay = 'none';
-		if( config.slideNumber && !this.Reveal.isPrintView() ) {
+		if( config.slideNumber && !this.Reveal.isPrintingPDF() ) {
 			if( config.showSlideNumber === 'all' ) {
 				slideNumberDisplay = 'block';
 			}
@@ -63,7 +56,7 @@ export default class SlideNumber {

 		let config = this.Reveal.getConfig();
 		let value;
-		let format = SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL;
+		let format = 'h.v';

 		if ( typeof config.slideNumber === 'function' ) {
 			value = config.slideNumber( slide );
@@ -76,7 +69,7 @@ export default class SlideNumber {
 			// If there are ONLY vertical slides in this deck, always use
 			// a flattened slide number
 			if( !/c/.test( format ) && this.Reveal.getHorizontalSlides().length === 1 ) {
-				format = SLIDE_NUMBER_FORMAT_CURRENT;
+				format = 'c';
 			}

 			// Offset the current slide number by 1 to make it 1-indexed
@@ -84,16 +77,16 @@ export default class SlideNumber {

 			value = [];
 			switch( format ) {
-				case SLIDE_NUMBER_FORMAT_CURRENT:
+				case 'c':
 					value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset );
 					break;
-				case SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL:
+				case 'c/t':
 					value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset, '/', this.Reveal.getTotalSlides() );
 					break;
 				default:
 					let indices = this.Reveal.getIndices( slide );
 					value.push( indices.h + horizontalOffset );
-					let sep = format === SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL ? '/' : '.';
+					let sep = format === 'h/v' ? '/' : '.';
 					if( this.Reveal.isVerticalSlide( slide ) ) value.push( sep, indices.v + 1 );
 			}
 		}
--- a/js/controllers/touch.js
+++ b/js/controllers/touch.js
@@ -84,7 +84,7 @@ export default class Touch {
 	isSwipePrevented( target ) {

 		// Prevent accidental swipes when scrubbing timelines
-		if( matches( target, 'video[controls], audio[controls]' ) ) return true;
+		if( matches( target, 'video, audio' ) ) return true;

 		while( target && typeof target.hasAttribute === 'function' ) {
 			if( target.hasAttribute( 'data-prevent-swipe' ) ) return true;
@@ -103,8 +103,6 @@ export default class Touch {
 	 */
 	onTouchStart( event ) {

-		this.touchCaptured = false;
-
 		if( this.isSwipePrevented( event.target ) ) return true;

 		this.touchStartX = event.touches[0].clientX;
@@ -216,14 +214,6 @@ export default class Touch {
 	 */
 	onTouchEnd( event ) {

-		// Media playback is only allowed as a direct result of a
-		// user interaction. Some mobile devices do not consider a
-		// 'touchmove' to be a direct user action. If this is the
-		// case, we fall back to starting playback here instead.
-		if( this.touchCaptured && this.Reveal.slideContent.isNotAllowedToPlay() ) {
-			this.Reveal.startEmbeddedContent( this.Reveal.getCurrentSlide() );
-		}
-
 		this.touchCaptured = false;

 	}
--- a/js/reveal.js
+++ b/js/reveal.js
--- a/js/utils/color.js
+++ b/js/utils/color.js
@@ -44,7 +44,7 @@ export const colorToRgb = ( color ) => {
 		};
 	}

-	let rgba = color.match( /^rgba\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*([\d]+|[\d]*.[\d]+)\s*\)$/i );
+	let rgba = color.match( /^rgba\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\,\s*([\d]+|[\d]*.[\d]+)\s*\)$/i );
 	if( rgba ) {
 		return {
 			r: parseInt( rgba[1], 10 ),
--- a/js/utils/constants.js
+++ b/js/utils/constants.js
@@ -2,16 +2,9 @@
 export const SLIDES_SELECTOR = '.slides section';
 export const HORIZONTAL_SLIDES_SELECTOR = '.slides>section';
 export const VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section';
-export const HORIZONTAL_BACKGROUNDS_SELECTOR = '.backgrounds>.slide-background';

 // Methods that may not be invoked via the postMessage API
 export const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener|showPreview/;

 // Regex for retrieving the fragment style from a class attribute
-export const FRAGMENT_STYLE_REGEX = /fade-(down|up|right|left|out|in-then-out|in-then-semi-out)|semi-fade-out|current-visible|shrink|grow/;
-
-// Slide number formats
-export const SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL = 'h.v';
-export const SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL = 'h/v';
-export const SLIDE_NUMBER_FORMAT_CURRENT = 'c';
-export const SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL = 'c/t';
+export const FRAGMENT_STYLE_REGEX = /fade-(down|up|right|left|out|in-then-out|in-then-semi-out)|semi-fade-out|current-visible|shrink|grow/;
--- a/js/utils/util.js
+++ b/js/utils/util.js
@@ -294,20 +294,4 @@ 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()}`
-	  );
 }
--- a/leetcode-20230110.md
+++ b/leetcode-20230110.md
@@ -0,0 +1,147 @@
+# Leetcode 💻 寒假 20230110
+
+---
+
+### 179. Largest Number
+
+给定一个非负整数列表 nums，将它们排列成最大的数并返回。
+
+```cpp [|4-6|7-9|10-11|13]
+class Solution {
+public:
+    string largestNumber(vector<int>& nums) {
+        vector<string> v;
+        v.reserve(nums.size());
+        for (auto const &i : nums) v.push_back(to_string(i));
+        sort(v.begin(), v.end(), [](string &a, string &b) {
+            return a + b > b + a;
+        });
+        string ret;
+        for (auto const &s : v) ret += s;
+        // 处理 ["0", "0", "0"] 的情况
+        return ret.startswith('0') ? "0" : ret;
+    }
+};
+```
+
+Note:
+
+```python
+'1' + '3' < '2'    # True
+'1' + '3' < '22'   # True
+'1' < '11'         # True
+'1' + '0' == '10'  # True
+```
+
+---
+
+### 179. Largest Number
+
+Python 版本
+
+```python [|4|5-7|8]
+from functools import cmp_to_key
+class Solution:
+    def largestNumber(self, nums: List[int]) -> str:
+        strs = [str(i) for i in nums]
+        strs.sort(key = cmp_to_key(
+            lambda a, b: -1 if a + b > b + a else 1
+        ))
+        return '0' if strs[0] == '0' else ''.join(strs)
+```
+
+Note:
+
+思路和刚刚的 c++ 是一样的，但我主要想给各位介绍一下python的写法，
+因为我看群里用python的人还是不少的，当然这种写法是好是坏见仁见智了，我个人认为是比较好的。
+
+4 首先我们用这个列表生成式将nums转为字符串strs， strs 是一个列表，列表中的每个元素是str(i),i是遍历nums得到的变量。
+
+5-7 接着对strs进行排序，这个cmp to key 是python3的设计，他把一个比较用来比较大小的函数变成key函数，
+这个比较函数做什么呢，他输入两个变量，如果a+b比b+a大，则这个比较函数返回-1,否则返回1,注意这里a和b的类型
+都是字符串，a+b表示的是字符串a和字符串b拼接之后的结果
+
+8 最后用一个三元表达式返回结果，和上面c++的思路是一样的，
+注意这又有一个python好用的方法，字符串.join,后面跟一个数组，
+意思是把这个数组用空字符串拼接起来
+
+---
+
+### 347. Top K Frequent Element
+
+```cpp [|4-6|8-13|15-19|21-28]
+class Solution {
+public:
+    vector<int> topKFrequent(vector<int>& nums, int k) {
+        unordered_map<int, int> count;
+        for (auto const &n : nums)
+            count[n]++;
+        
+        // 将 map 转为列表
+        // [(0, 5), (1, 3), ... ]
+        // 代表数字 0 出现 5 次，数字 1 出现 3 次
+        vector<pair<int, int>> tmp;
+        for (auto const &pair : count)
+            tmp.push_back(pair);
+        
+        sort(tmp.begin(), tmp.end(), [](
+            const pair<int, int> &a,
+            const pair<int, int> &b) {
+                return a.second > b.second;
+            });
+        
+        vector<int> ret;
+        for (auto const &pair : tmp) {
+            if (ret.size() >= k)
+                break;
+            ret.push_back(pair.first);
+        }
+
+        return ret;
+    }
+};
+```
+
+---
+
+### 347. Top K Frequent Element
+
+Python 版本
+
+```python [4-5]
+import collections
+class Solution:
+    def topKFrequent(self, nums: List[int], k: int) -> List[int]:
+        count = collections.Counter(nums).most_common(k)
+        return [i[0] for i in count]
+```
+
+---
+
+### 75. Sort Colors
+
+C++
+
+```cpp [|2-5|6|7-11|12-14|15-18]
+void sortColors(vector<int> &nums) {
+  auto low = nums.begin();
+  auto high = nums.end() - 1;
+
+  for (auto mid = nums.begin(); mid <= high;) {
+    switch (*mid) {
+    case 0:
+      swap(*mid, *low);
+      mid++;
+      low++;
+      break;
+    case 1:
+      mid++;
+      break;
+    case 2:
+      swap(*mid, *high);
+      high--;
+      break;
+    }
+  }
+}
+```
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
  "name": "reveal.js",
-  "version": "5.2.1",
+  "version": "4.4.0",
  "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": ">=18.0.0"
+    "node": ">=10.0.0"
  },
  "keywords": [
    "reveal",
@@ -30,41 +30,33 @@
    "presentation"
  ],
  "devDependencies": {
-    "@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",
+    "@babel/core": "^7.14.3",
+    "@babel/eslint-parser": "^7.14.3",
+    "@babel/preset-env": "^7.14.2",
+    "@rollup/plugin-babel": "^5.3.0",
+    "@rollup/plugin-commonjs": "^19.0.0",
+    "@rollup/plugin-node-resolve": "^13.0.0",
+    "babel-plugin-transform-html-import-to-string": "0.0.1",
    "colors": "^1.4.0",
-    "core-js": "^3.33.1",
-    "fitty": "^2.3.7",
-    "glob": "^10.3.10",
-    "gulp": "^5.0.0",
+    "core-js": "^3.12.1",
+    "fitty": "^2.3.0",
+    "glob": "^7.1.7",
+    "gulp": "^4.0.2",
    "gulp-autoprefixer": "^8.0.0",
-    "gulp-clean-css": "^4.3.0",
+    "gulp-clean-css": "^4.2.0",
    "gulp-connect": "^5.7.0",
    "gulp-eslint": "^6.0.0",
-    "gulp-header-comment": "^0.10.0",
-    "gulp-zip": "^5.1.0",
-    "highlight.js": "^11.9.0",
-    "marked": "^4.3.0",
-    "node-qunit-puppeteer": "^2.2.0",
-    "through2": "^4.0.2",
-    "qunit": "^2.22.0",
-    "rollup": "^4.1.5",
-    "sass": "^1.79.4",
-    "yargs": "^17.7.2"
-  },
-  "overrides": {
-    "gulp-connect": {
-      "send": "0.19.0"
-    },
-    "gulp-header-comment": {
-      "moment": "2.30.1"
-    }
+    "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"
  },
  "browserslist": "> 2%, not dead",
  "eslintConfig": {
--- a/plugin/highlight/highlight.esm.js
+++ b/plugin/highlight/highlight.esm.js
--- a/plugin/highlight/highlight.js
+++ b/plugin/highlight/highlight.js
--- a/plugin/highlight/plugin.js
+++ b/plugin/highlight/plugin.js
@@ -52,7 +52,7 @@ const Plugin = {
 				block.innerHTML = betterTrim( block );
 			}

-			// Escape HTML tags unless the "data-noescape" attribute is present
+			// Escape HTML tags unless the "data-noescape" attrbute is present
 			if( config.escapeHTML && !block.hasAttribute( 'data-noescape' )) {
 				block.innerHTML = block.innerHTML.replace( /</g,"&lt;").replace(/>/g, '&gt;' );
 			}
@@ -138,7 +138,7 @@ const Plugin = {

 					// Scroll highlights into view as we step through them
 					fragmentBlock.addEventListener( 'visible', Plugin.scrollHighlightedLineIntoView.bind( Plugin, fragmentBlock, scrollState ) );
-					fragmentBlock.addEventListener( 'hidden', Plugin.scrollHighlightedLineIntoView.bind( Plugin, fragmentBlock.previousElementSibling, scrollState ) );
+					fragmentBlock.addEventListener( 'hidden', Plugin.scrollHighlightedLineIntoView.bind( Plugin, fragmentBlock.previousSibling, scrollState ) );

 				} );

--- a/plugin/markdown/markdown.esm.js
+++ b/plugin/markdown/markdown.esm.js
--- a/plugin/markdown/markdown.js
+++ b/plugin/markdown/markdown.js
--- a/plugin/markdown/plugin.js
+++ b/plugin/markdown/plugin.js
@@ -7,16 +7,13 @@
 import { marked } from 'marked';

 const DEFAULT_SLIDE_SEPARATOR = '\r?\n---\r?\n',
-	  DEFAULT_VERTICAL_SEPARATOR = null,
-	  DEFAULT_NOTES_SEPARATOR = '^\s*notes?:',
+	  DEFAULT_NOTES_SEPARATOR = 'notes?:',
 	  DEFAULT_ELEMENT_ATTRIBUTES_SEPARATOR = '\\\.element\\\s*?(.+?)$',
 	  DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR = '\\\.slide:\\\s*?(\\\S.+?)$';

 const SCRIPT_END_PLACEHOLDER = '__SCRIPT_END__';

-// 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 CODE_LINE_NUMBER_REGEX = /\[([\s\d,|-]*)\]/;

 const HTML_ESCAPE_MAP = {
  '&': '&amp;',
@@ -38,22 +35,22 @@ const Plugin = () => {
 	function getMarkdownFromSlide( section ) {

 		// look for a <script> or <textarea data-template> wrapper
-		const template = section.querySelector( '[data-template]' ) || section.querySelector( 'script' );
+		var template = section.querySelector( '[data-template]' ) || section.querySelector( 'script' );

 		// strip leading whitespace so it isn't evaluated as code
-		let text = ( template || section ).textContent;
+		var text = ( template || section ).textContent;

 		// restore script end tags
 		text = text.replace( new RegExp( SCRIPT_END_PLACEHOLDER, 'g' ), '</script>' );

-		const leadingWs = text.match( /^\n?(\s*)/ )[1].length,
+		var 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'), function(m, p1) { return '\n' + p1 ; } );
+			text = text.replace( new RegExp('\\n?\\t{' + leadingTabs + '}','g'), '\n' );
 		}
 		else if( leadingWs > 1 ) {
-			text = text.replace( new RegExp('\\n? {' + leadingWs + '}(.*)', 'g'), function(m, p1) { return '\n' + p1 ; } );
+			text = text.replace( new RegExp('\\n? {' + leadingWs + '}', 'g'), '\n' );
 		}

 		return text;
@@ -68,11 +65,11 @@ const Plugin = () => {
 	 */
 	function getForwardedAttributes( section ) {

-		const attributes = section.attributes;
-		const result = [];
+		var attributes = section.attributes;
+		var result = [];

-		for( let i = 0, len = attributes.length; i < len; i++ ) {
-			const name = attributes[i].name,
+		for( var i = 0, len = attributes.length; i < len; i++ ) {
+			var name = attributes[i].name,
 				value = attributes[i].value;

 			// disregard attributes that are used for markdown loading/parsing
@@ -95,12 +92,10 @@ const Plugin = () => {
 	 * values for what's not defined.
 	 */
 	function getSlidifyOptions( options ) {
-		const markdownConfig = deck?.getConfig?.().markdown;

 		options = options || {};
-		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.separator = options.separator || DEFAULT_SLIDE_SEPARATOR;
+		options.notesSeparator = options.notesSeparator || DEFAULT_NOTES_SEPARATOR;
 		options.attributes = options.attributes || '';

 		return options;
@@ -114,7 +109,7 @@ const Plugin = () => {

 		options = getSlidifyOptions( options );

-		const notesMatch = content.split( new RegExp( options.notesSeparator, 'mgi' ) );
+		var notesMatch = content.split( new RegExp( options.notesSeparator, 'mgi' ) );

 		if( notesMatch.length === 2 ) {
 			content = notesMatch[0] + '<aside class="notes">' + marked(notesMatch[1].trim()) + '</aside>';
@@ -136,10 +131,10 @@ const Plugin = () => {

 		options = getSlidifyOptions( options );

-		const separatorRegex = new RegExp( options.separator + ( options.verticalSeparator ? '|' + options.verticalSeparator : '' ), 'mg' ),
+		var separatorRegex = new RegExp( options.separator + ( options.verticalSeparator ? '|' + options.verticalSeparator : '' ), 'mg' ),
 			horizontalSeparatorRegex = new RegExp( options.separator );

-		let matches,
+		var matches,
 			lastIndex = 0,
 			isHorizontal,
 			wasHorizontal = true,
@@ -148,7 +143,7 @@ const Plugin = () => {

 		// iterate until all blocks between separators are stacked up
 		while( matches = separatorRegex.exec( markdown ) ) {
-			const notes = null;
+			var notes = null;

 			// determine direction (horizontal by default)
 			isHorizontal = horizontalSeparatorRegex.test( matches[0] );
@@ -177,10 +172,10 @@ const Plugin = () => {
 		// add the remaining slide
 		( wasHorizontal ? sectionStack : sectionStack[sectionStack.length-1] ).push( markdown.substring( lastIndex ) );

-		let markdownSections = '';
+		var markdownSections = '';

 		// flatten the hierarchical stack, and insert <section data-markdown> tags
-		for( let i = 0, len = sectionStack.length; i < len; i++ ) {
+		for( var i = 0, len = sectionStack.length; i < len; i++ ) {
 			// vertical
 			if( sectionStack[i] instanceof Array ) {
 				markdownSections += '<section '+ options.attributes +'>';
@@ -209,7 +204,7 @@ const Plugin = () => {

 		return new Promise( function( resolve ) {

-			const externalPromises = [];
+			var externalPromises = [];

 			[].slice.call( scope.querySelectorAll( 'section[data-markdown]:not([data-markdown-parsed])') ).forEach( function( section, i ) {

@@ -262,13 +257,13 @@ const Plugin = () => {

 		return new Promise( function( resolve, reject ) {

-			const xhr = new XMLHttpRequest(),
+			var xhr = new XMLHttpRequest(),
 				url = section.getAttribute( 'data-markdown' );

-			const datacharset = section.getAttribute( 'data-charset' );
+			var 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 );
 			}

@@ -313,17 +308,17 @@ const Plugin = () => {
 	 */
 	function addAttributeInElement( node, elementTarget, separator ) {

-		const markdownClassesInElementsRegex = new RegExp( separator, 'mg' );
-		const markdownClassRegex = new RegExp( "([^\"= ]+?)=\"([^\"]+?)\"|(data-[^\"= ]+?)(?=[\" ])", 'mg' );
-		let nodeValue = node.nodeValue;
-		let matches,
+		var mardownClassesInElementsRegex = new RegExp( separator, 'mg' );
+		var mardownClassRegex = new RegExp( "([^\"= ]+?)=\"([^\"]+?)\"|(data-[^\"= ]+?)(?=[\" ])", 'mg' );
+		var nodeValue = node.nodeValue;
+		var matches,
 			matchesClass;
-		if( matches = markdownClassesInElementsRegex.exec( nodeValue ) ) {
+		if( matches = mardownClassesInElementsRegex.exec( nodeValue ) ) {

-			const classes = matches[1];
-			nodeValue = nodeValue.substring( 0, matches.index ) + nodeValue.substring( markdownClassesInElementsRegex.lastIndex );
+			var classes = matches[1];
+			nodeValue = nodeValue.substring( 0, matches.index ) + nodeValue.substring( mardownClassesInElementsRegex.lastIndex );
 			node.nodeValue = nodeValue;
-			while( matchesClass = markdownClassRegex.exec( classes ) ) {
+			while( matchesClass = mardownClassRegex.exec( classes ) ) {
 				if( matchesClass[2] ) {
 					elementTarget.setAttribute( matchesClass[1], matchesClass[2] );
 				} else {
@@ -341,34 +336,34 @@ const Plugin = () => {
 	 */
 	function addAttributes( section, element, previousElement, separatorElementAttributes, separatorSectionAttributes ) {

-		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 ( 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 ( i > 0 ) {
-					let j = i - 1;
+					var j = i - 1;
 					while ( j >= 0 ) {
-						const aPreviousChildElement = element.childNodes[j];
-						if ( typeof aPreviousChildElement.setAttribute === 'function' && aPreviousChildElement.tagName !== "BR" ) {
+						var aPreviousChildElement = element.childNodes[j];
+						if ( typeof aPreviousChildElement.setAttribute == 'function' && aPreviousChildElement.tagName != "BR" ) {
 							previousParentElement = aPreviousChildElement;
 							break;
 						}
 						j = j - 1;
 					}
 				}
-				let parentSection = section;
-				if( childElement.nodeName ===  "section" ) {
+				var 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 );
 			}
 		}
@@ -380,14 +375,14 @@ const Plugin = () => {
 	 */
 	function convertSlides() {

-		const sections = deck.getRevealElement().querySelectorAll( '[data-markdown]:not([data-markdown-parsed])');
+		var sections = deck.getRevealElement().querySelectorAll( '[data-markdown]:not([data-markdown-parsed])');

 		[].slice.call( sections ).forEach( function( section ) {

 			section.setAttribute( 'data-markdown-parsed', true )

-			const notes = section.querySelector( 'aside.notes' );
-			const markdown = getMarkdownFromSlide( section );
+			var notes = section.querySelector( 'aside.notes' );
+			var markdown = getMarkdownFromSlide( section );

 			section.innerHTML = marked( markdown );
 			addAttributes( 	section, section, null, section.getAttribute( 'data-element-attributes' ) ||
@@ -434,23 +429,14 @@ 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 ) ) {
-						let lineNumberOffsetMatch =  language.match( CODE_LINE_NUMBER_REGEX )[2];
-						if (lineNumberOffsetMatch){
-							lineNumberOffset =  `data-ln-start-from="${lineNumberOffsetMatch.trim()}"`;
-						}
-
-						lineNumbers = language.match( CODE_LINE_NUMBER_REGEX )[3].trim();
+						lineNumbers = language.match( CODE_LINE_NUMBER_REGEX )[1].trim();
 						lineNumbers = `data-line-numbers="${lineNumbers}"`;
 						language = language.replace( CODE_LINE_NUMBER_REGEX, '' ).trim();
 					}
@@ -460,9 +446,7 @@ 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} ${lineNumberOffset} class="${language}">${code}</code></pre>`;
+					return `<pre><code ${lineNumbers} class="${language}">${code}</code></pre>`;
 				};
 			}

--- a/plugin/math/katex.js
+++ b/plugin/math/katex.js
@@ -16,7 +16,7 @@ export const KaTeX = () => {
 			{left: '\\(', right: '\\)', display: false},
 			{left: '\\[', right: '\\]', display: true}
 		],
-		ignoredTags: ['script', 'noscript', 'style', 'textarea', 'pre', 'code']
+		ignoredTags: ['script', 'noscript', 'style', 'textarea', 'pre']
 	}

 	const loadCss = src => {
--- a/plugin/math/math.esm.js
+++ b/plugin/math/math.esm.js
@@ -1,6 +1,6 @@
-const t=()=>{let t,e={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(","\\)"]],skipTags:["script","noscript","style","textarea","pre","code"]},skipStartupTypeset:!0};return{id:"mathjax2",init:function(a){t=a;let n=t.getConfig().mathjax2||t.getConfig().math||{},i={...e,...n},s=(i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js")+"?config="+(i.config||"TeX-AMS_HTML-full");i.tex2jax={...e.tex2jax,...n.tex2jax},i.mathjax=i.config=null,function(t,e){let a=document.querySelector("head"),n=document.createElement("script");n.type="text/javascript",n.src=t;let i=()=>{"function"==typeof e&&(e.call(),e=null)};n.onload=i,n.onreadystatechange=()=>{"loaded"===this.readyState&&i()},a.appendChild(n)}(s,(function(){MathJax.Hub.Config(i),MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.getRevealElement()]),MathJax.Hub.Queue(t.layout),t.on("slidechanged",(function(t){MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.currentSlide])}))}))}}},e=t;
+const t=()=>{let t,e={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(","\\)"]],skipTags:["script","noscript","style","textarea","pre"]},skipStartupTypeset:!0};return{id:"mathjax2",init:function(a){t=a;let n=t.getConfig().mathjax2||t.getConfig().math||{},i={...e,...n},s=(i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js")+"?config="+(i.config||"TeX-AMS_HTML-full");i.tex2jax={...e.tex2jax,...n.tex2jax},i.mathjax=i.config=null,function(t,e){let a=document.querySelector("head"),n=document.createElement("script");n.type="text/javascript",n.src=t;let i=()=>{"function"==typeof e&&(e.call(),e=null)};n.onload=i,n.onreadystatechange=()=>{"loaded"===this.readyState&&i()},a.appendChild(n)}(s,(function(){MathJax.Hub.Config(i),MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.getRevealElement()]),MathJax.Hub.Queue(t.layout),t.on("slidechanged",(function(t){MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.currentSlide])}))}))}}},e=t;
 /*!
 * This plugin is a wrapper for the MathJax2,
 * MathJax3 and KaTeX typesetter plugins.
 */
-var a=Plugin=Object.assign(e(),{KaTeX:()=>{let t,e={version:"latest",delimiters:[{left:"$$",right:"$$",display:!0},{left:"$",right:"$",display:!1},{left:"\\(",right:"\\)",display:!1},{left:"\\[",right:"\\]",display:!0}],ignoredTags:["script","noscript","style","textarea","pre","code"]};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:o,version:l,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","code"]},startup:{ready:()=>{MathJax.startup.defaultReady(),MathJax.startup.promise.then((()=>{t.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(){t.addEventListener("slidechanged",(function(t){MathJax.typeset()}))}))}}}});export{a as default};
+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;
--- a/plugin/math/math.js
+++ b/plugin/math/math.js
@@ -1 +1 @@
-!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).RevealMath=e()}(this,(function(){"use strict";const t=()=>{let t,e={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(","\\)"]],skipTags:["script","noscript","style","textarea","pre","code"]},skipStartupTypeset:!0};return{id:"mathjax2",init:function(n){t=n;let a=t.getConfig().mathjax2||t.getConfig().math||{},i={...e,...a},s=(i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js")+"?config="+(i.config||"TeX-AMS_HTML-full");i.tex2jax={...e.tex2jax,...a.tex2jax},i.mathjax=i.config=null,function(t,e){let n=document.querySelector("head"),a=document.createElement("script");a.type="text/javascript",a.src=t;let i=()=>{"function"==typeof e&&(e.call(),e=null)};a.onload=i,a.onreadystatechange=()=>{"loaded"===this.readyState&&i()},n.appendChild(a)}(s,(function(){MathJax.Hub.Config(i),MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.getRevealElement()]),MathJax.Hub.Queue(t.layout),t.on("slidechanged",(function(t){MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.currentSlide])}))}))}}},e=t;return Plugin=Object.assign(e(),{KaTeX:()=>{let t,e={version:"latest",delimiters:[{left:"$$",right:"$$",display:!0},{left:"$",right:"$",display:!1},{left:"\\(",right:"\\)",display:!1},{left:"\\[",right:"\\]",display:!0}],ignoredTags:["script","noscript","style","textarea","pre","code"]};const n=t=>new Promise(((e,n)=>{const a=document.createElement("script");a.type="text/javascript",a.onload=e,a.onerror=n,a.src=t,document.head.append(a)}));return{id:"katex",init:function(a){t=a;let i=t.getConfig().katex||{},s={...e,...i};const{local:o,version:l,extensions:c,...r}=s;let d=s.local||"https://cdn.jsdelivr.net/npm/katex",u=s.local?"":"@"+s.version,p=d+u+"/dist/katex.min.css",h=d+u+"/dist/contrib/mhchem.min.js",x=d+u+"/dist/contrib/auto-render.min.js",m=[d+u+"/dist/katex.min.js"];s.extensions&&s.extensions.includes("mhchem")&&m.push(h),m.push(x);const f=()=>{renderMathInElement(a.getSlidesElement(),r),t.layout()};(t=>{let e=document.createElement("link");e.rel="stylesheet",e.href=t,document.head.appendChild(e)})(p),async function(t){for(const e of t)await n(e)}(m).then((()=>{t.isReady()?f():t.on("ready",f.bind(this))}))}}},MathJax2:t,MathJax3:()=>{let t,e={tex:{inlineMath:[["$","$"],["\\(","\\)"]]},options:{skipHtmlTags:["script","noscript","style","textarea","pre","code"]},startup:{ready:()=>{MathJax.startup.defaultReady(),MathJax.startup.promise.then((()=>{t.layout()}))}}};return{id:"mathjax3",init:function(n){t=n;let a=t.getConfig().mathjax3||{},i={...e,...a};i.tex={...e.tex,...a.tex},i.options={...e.options,...a.options},i.startup={...e.startup,...a.startup};let s=i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js";i.mathjax=null,window.MathJax=i,function(t,e){let n=document.createElement("script");n.type="text/javascript",n.id="MathJax-script",n.src=t,n.async=!0,n.onload=()=>{"function"==typeof e&&(e.call(),e=null)},document.head.appendChild(n)}(s,(function(){t.addEventListener("slidechanged",(function(t){MathJax.typeset()}))}))}}}})}));
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).RevealMath=e()}(this,(function(){"use strict";const t=()=>{let t,e={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(","\\)"]],skipTags:["script","noscript","style","textarea","pre"]},skipStartupTypeset:!0};return{id:"mathjax2",init:function(n){t=n;let a=t.getConfig().mathjax2||t.getConfig().math||{},i={...e,...a},s=(i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js")+"?config="+(i.config||"TeX-AMS_HTML-full");i.tex2jax={...e.tex2jax,...a.tex2jax},i.mathjax=i.config=null,function(t,e){let n=document.querySelector("head"),a=document.createElement("script");a.type="text/javascript",a.src=t;let i=()=>{"function"==typeof e&&(e.call(),e=null)};a.onload=i,a.onreadystatechange=()=>{"loaded"===this.readyState&&i()},n.appendChild(a)}(s,(function(){MathJax.Hub.Config(i),MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.getRevealElement()]),MathJax.Hub.Queue(t.layout),t.on("slidechanged",(function(t){MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.currentSlide])}))}))}}},e=t;return Plugin=Object.assign(e(),{KaTeX:()=>{let t,e={version:"latest",delimiters:[{left:"$$",right:"$$",display:!0},{left:"$",right:"$",display:!1},{left:"\\(",right:"\\)",display:!1},{left:"\\[",right:"\\]",display:!0}],ignoredTags:["script","noscript","style","textarea","pre"]};const n=t=>new Promise(((e,n)=>{const a=document.createElement("script");a.type="text/javascript",a.onload=e,a.onerror=n,a.src=t,document.head.append(a)}));return{id:"katex",init:function(a){t=a;let i=t.getConfig().katex||{},s={...e,...i};const{local:o,version:l,extensions:r,...c}=s;let d=s.local||"https://cdn.jsdelivr.net/npm/katex",u=s.local?"":"@"+s.version,p=d+u+"/dist/katex.min.css",h=d+u+"/dist/contrib/mhchem.min.js",x=d+u+"/dist/contrib/auto-render.min.js",m=[d+u+"/dist/katex.min.js"];s.extensions&&s.extensions.includes("mhchem")&&m.push(h),m.push(x);const f=()=>{renderMathInElement(a.getSlidesElement(),c),t.layout()};(t=>{let e=document.createElement("link");e.rel="stylesheet",e.href=t,document.head.appendChild(e)})(p),async function(t){for(const e of t)await n(e)}(m).then((()=>{t.isReady()?f():t.on("ready",f.bind(this))}))}}},MathJax2:t,MathJax3:()=>{let t,e={tex:{inlineMath:[["$","$"],["\\(","\\)"]]},options:{skipHtmlTags:["script","noscript","style","textarea","pre"]},startup:{ready:()=>{MathJax.startup.defaultReady(),MathJax.startup.promise.then((()=>{Reveal.layout()}))}}};return{id:"mathjax3",init:function(n){t=n;let a=t.getConfig().mathjax3||{},i={...e,...a};i.tex={...e.tex,...a.tex},i.options={...e.options,...a.options},i.startup={...e.startup,...a.startup};let s=i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js";i.mathjax=null,window.MathJax=i,function(t,e){let n=document.createElement("script");n.type="text/javascript",n.id="MathJax-script",n.src=t,n.async=!0,n.onload=()=>{"function"==typeof e&&(e.call(),e=null)},document.head.appendChild(n)}(s,(function(){Reveal.addEventListener("slidechanged",(function(t){MathJax.typeset()}))}))}}}})}));
--- a/plugin/math/mathjax2.js
+++ b/plugin/math/mathjax2.js
@@ -13,7 +13,7 @@ export const MathJax2 = () => {
 		messageStyle: 'none',
 		tex2jax: {
 			inlineMath: [ [ '$', '$' ], [ '\\(', '\\)' ] ],
-			skipTags: [ 'script', 'noscript', 'style', 'textarea', 'pre', 'code' ]
+			skipTags: [ 'script', 'noscript', 'style', 'textarea', 'pre' ]
 		},
 		skipStartupTypeset: true
 	};
--- a/plugin/math/mathjax3.js
+++ b/plugin/math/mathjax3.js
@@ -15,13 +15,13 @@ export const MathJax3 = () => {
            inlineMath: [ [ '$', '$' ], [ '\\(', '\\)' ]  ]
        },
        options: {
-            skipHtmlTags: [ 'script', 'noscript', 'style', 'textarea', 'pre', 'code' ]
+            skipHtmlTags: [ 'script', 'noscript', 'style', 'textarea', 'pre' ]
        },
        startup: {
            ready: () => {
                MathJax.startup.defaultReady();
                MathJax.startup.promise.then(() => {
-                    deck.layout();
+                    Reveal.layout();
                });
            }
        }
@@ -66,7 +66,7 @@ export const MathJax3 = () => {

            loadScript( url, function() {
                // Reprocess equations in slides when they turn visible
-                deck.addEventListener( 'slidechanged', function( event ) {
+                Reveal.addEventListener( 'slidechanged', function( event ) {
                    MathJax.typeset();
                } );
            } );
--- a/plugin/notes/notes.esm.js
+++ b/plugin/notes/notes.esm.js
--- a/plugin/notes/notes.js
+++ b/plugin/notes/notes.js
--- a/plugin/notes/plugin.js
+++ b/plugin/notes/plugin.js
@@ -146,12 +146,8 @@ const Plugin = () => {
 		}

 		// Look for notes defined in an aside element
-		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' );
+		if( notesElements ) {
+			messageData.notes = Array.from(notesElements).map( notesElement => notesElement.innerHTML ).join( '\n' );
 			messageData.markdown = notesElements[0] && typeof notesElements[0].getAttribute( 'data-markdown' ) === 'string';
 		}

@@ -180,16 +176,14 @@ const Plugin = () => {
 		// (added 12/5/22 as a XSS safeguard)
 		if( isSameOriginEvent( event ) ) {

-			try {
-				let data = JSON.parse( event.data );
-				if( data && data.namespace === 'reveal-notes' && data.type === 'connected' ) {
-					clearInterval( connectInterval );
-					onConnected();
-				}
-				else if( data && data.namespace === 'reveal-notes' && data.type === 'call' ) {
-					callRevealApi( data.methodName, data.arguments, data.callId );
-				}
-		  } catch (e) {}
+			let data = JSON.parse( event.data );
+			if( data && data.namespace === 'reveal-notes' && data.type === 'connected' ) {
+				clearInterval( connectInterval );
+				onConnected();
+			}
+			else if( data && data.namespace === 'reveal-notes' && data.type === 'call' ) {
+				callRevealApi( data.methodName, data.arguments, data.callId );
+			}

 		}

@@ -209,10 +203,6 @@ const Plugin = () => {
 		deck.on( 'overviewshown', post );
 		deck.on( 'paused', post );
 		deck.on( 'resumed', post );
-		deck.on( 'previewiframe', post );
-		deck.on( 'previewimage', post );
-		deck.on( 'previewvideo', post );
-		deck.on( 'closeoverlay', post );

 		// Post the initial state
 		post();
@@ -233,7 +223,7 @@ const Plugin = () => {
 					openSpeakerWindow();
 				}
 				else {
-					// Keep listening for speaker view heartbeats. If we receive a
+					// Keep listening for speaker view hearbeats. If we receive a
 					// heartbeat from an orphaned window, reconnect it. This ensures
 					// that we remain connected to the notes even if the presentation
 					// is reloaded.
--- a/plugin/notes/speaker-view.html
+++ b/plugin/notes/speaker-view.html
@@ -383,13 +383,6 @@

 				window.addEventListener( 'message', function( event ) {

-					// Validate the origin of all messages to avoid parsing messages
-					// that aren't meant for us. Ignore when running off file:// so
-					// that the speaker view continues to work without a web server.
-					if( window.location.origin !== event.origin && window.location.origin !== 'file://' ) {
-						return
-					}
-
 					clearTimeout( connectionTimeout );
 					connectionStatus.style.display = 'none';

@@ -414,24 +407,14 @@
 					}
 					// Messages sent by the reveal.js inside of the current slide preview
 					else if( data && data.namespace === 'reveal' ) {
-						const supportedEvents = [
-							'slidechanged',
-							'fragmentshown',
-							'fragmenthidden',
-							'paused',
-							'resumed',
-							'previewiframe',
-							'previewimage',
-							'previewvideo',
-							'closeoverlay'
-						];
-
 						if( /ready/.test( data.eventName ) ) {
 							// Send a message back to notify that the handshake is complete
 							window.opener.postMessage( JSON.stringify({ namespace: 'reveal-notes', type: 'connected'} ), '*' );
 						}
-						else if( supportedEvents.includes( data.eventName ) && currentState !== JSON.stringify( data.state ) ) {
+						else if( /slidechanged|fragmentshown|fragmenthidden|paused|resumed/.test( data.eventName ) && currentState !== JSON.stringify( data.state ) ) {
+
 							dispatchStateToMainWindow( data.state );
+
 						}
 					}

@@ -504,12 +487,9 @@
 						notes.classList.add( 'hidden' );
 					}

-					// Don't show lightboxes in the upcoming slide
-					const { previewVideo, previewImage, previewIframe, ...upcomingState } = data.state;
-
 					// Update the note slides
 					currentSlide.contentWindow.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ] }), '*' );
-					upcomingSlide.contentWindow.postMessage( JSON.stringify({ method: 'setState', args: [ upcomingState ] }), '*' );
+					upcomingSlide.contentWindow.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ] }), '*' );
 					upcomingSlide.contentWindow.postMessage( JSON.stringify({ method: 'next' }), '*' );

 				}
@@ -553,8 +533,8 @@

 					var urlSeparator = /\?/.test(data.url) ? '&' : '?';
 					var hash = '#/' + data.state.indexh + '/' + data.state.indexv;
-					var currentURL = data.url + urlSeparator + params + '&scrollActivationWidth=false&postMessageEvents=true' + hash;
-					var upcomingURL = data.url + urlSeparator + params + '&scrollActivationWidth=false&controls=false' + hash;
+					var currentURL = data.url + urlSeparator + params + '&postMessageEvents=true' + hash;
+					var upcomingURL = data.url + urlSeparator + params + '&controls=false' + hash;

 					currentSlide = document.createElement( 'iframe' );
 					currentSlide.setAttribute( 'width', 1280 );
--- a/plugin/search/plugin.js
+++ b/plugin/search/plugin.js
@@ -137,7 +137,7 @@ const Plugin = () => {

 		this.setRegex = function(input)
 		{
-			input = input.trim();
+			input = input.replace(/^[^\w]+|[^\w]+$/g, "").replace(/[^\w'-]+/g, "|");
 			matchRegex = new RegExp("(" + input + ")","i");
 		}

@@ -235,9 +235,7 @@ const Plugin = () => {

 		},

-		open: openSearch,
-		close: closeSearch,
-		toggle: toggleSearch
+		open: openSearch

 	}
 };
--- a/plugin/search/search.esm.js
+++ b/plugin/search/search.esm.js
@@ -4,4 +4,4 @@
 *
 * @author Jon Snyder <snyder.jon@gmail.com>, February 2013
 */
-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 p("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||s(),"inline"!==t.style.display?a():d()}function p(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.trim(),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 f=e.getIndices(u),h=c.length,y=!1;for(n=0;n<h;n++)c[n].h===f.h&&c[n].v===f.v&&(y=!0);y||c.push(f),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:t=>{e=t,e.registerKeyboardShortcut("CTRL + Shift + F","Search"),document.addEventListener("keydown",(function(e){"F"==e.key&&(e.ctrlKey||e.metaKey)&&(e.preventDefault(),c())}),!1)},open:a,close:d,toggle:c}};export{e as default};
+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}};
--- a/plugin/search/search.js
+++ b/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,o,i,l,s;function r(){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(l){var t=n.value;""===t?(s&&s.remove(),o=null):(s=new f("slidecontent"),o=s.apply(t),i=0)}o&&(o.length&&o.length<=i&&(i=0),o.length>i&&(e.slide(o[i].h,o[i].v),i++))}(),l=!1;else l=!0}),!1),d()}function a(){t||r(),t.style.display="inline",n.focus(),n.select()}function d(){t||r(),t.style.display="none",s&&s.remove()}function c(){t||r(),"inline"!==t.style.display?a():d()}function f(t,n){var o=document.getElementById(t)||document.body,i=n||"EM",l=new RegExp("^(?:"+i+"|SCRIPT|FORM)$"),s=["#ff6","#a0ffff","#9f9","#f99","#f6f"],r=[],a=0,d="",c=[];this.setRegex=function(e){e=e.trim(),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&&!l.test(t.nodeName)){if(t.hasChildNodes())for(var n=0;n<t.childNodes.length;n++)this.hiliteWords(t.childNodes[n]);var o,f;if(3==t.nodeType)if((o=t.nodeValue)&&(f=d.exec(o))){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),r[f[0].toLowerCase()]||(r[f[0].toLowerCase()]=s[a++%s.length]);var g=document.createElement(i);g.appendChild(document.createTextNode(f[0])),g.style.backgroundColor=r[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(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(o),c}}return{id:"search",init:t=>{e=t,e.registerKeyboardShortcut("CTRL + Shift + F","Search"),document.addEventListener("keydown",(function(e){"F"==e.key&&(e.ctrlKey||e.metaKey)&&(e.preventDefault(),c())}),!1)},open:a,close:d,toggle:c}}}));
+	 */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}}}));
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
heimoshuiyu	f36e14ddf1	update leetcode 20230110.md	2023-01-11 15:22:35 +08:00
heimoshuiyu	d7cb7e1193	leetcode 179 347	2023-01-09 10:24:31 +08:00