ai lecture

fix: use `setAttribute` instead of `innerHTML` to prevent XSS

.github/workflows/js.yml

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

.npmignore

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

LICENSE

@@ -1,4 +1,4 @@
-Copyright (C) 2011-2022 Hakim El Hattab, http://hakim.se, and reveal.js contributors
+Copyright (C) 2011-2023 Hakim El Hattab, http://hakim.se, and reveal.js contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

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

ai_lecture.md

@@ -0,0 +1,219 @@
+# 使用 MLP 识别 MNIST 手写数字
+
+主讲人：陈永源 2024-01-05
+
+Note:
+这个课程假设各位是有编程基础的机器学习小白，课程我会用直观的说明方式讲解机器学习原理及相关代码，不会涉及到过多数学上的细节。
+
+---
+
+## 课程简介
+
+在这个课程中，我们将会使用机器学习技术对手写数字图像进行分类，并包括
+
+- 定义 Pytorch MLP 模型
+- 使用数据集工具 DataLoader
+- 从零开始训练模型
+- 使用测试集评估模型
+
+Note:
+
+机器学习和传统程序设计的一个主要区别是
+你无需明确告诉计算机该如何去识别一个数字
+例如说6这个数字有一个竖线还有一个圈
+你不需告诉计算机这些规则
+机器学习能够自动从数据集中学到这些特征
+并且使用这些特征逐步训练它自己的神经网络，
+然后逐步提升它的准确性，
+这和我们人类或者是生物的学习方式是类似的。
+
+---
+
+## 神经网络简介
+
+神经网络这一概念在 1959 年被提出
+
+神经网络的核心概念来源于人脑的神经元网络，它由许多相互连接的节点（或称为"神经元"）组成。这些节点可以接收输入，并根据输入数据的不同对其进行加权处理，产生输出
+
+![nn](./media/nn.png)
+
+
+Demo: <https://playground.tensorflow.org/>
+
+Note:
+
+该术语于1959年由IBM的亚瑟·塞缪尔提出，当时他正在开发能够下跳棋的人工智能程序。半个世纪后，预测模型已经嵌入在我们日常使用的许多产品当中，执行两项基本工作：一是对数据进行分类，例如判断路上是否有其他车辆，或者患者是否患有癌症；二是对未来结果做出预测，如预测股票是否会上涨
+
+而神经网络，是机器学习中一类特别重要的算法模型。神经网络的核心概念来源于人脑的神经元网络，它由许多相互连接的节点（或称为"神经元"）组成。这些节点可以接收输入，并根据输入数据的不同对其进行加权处理，产生输出。特别是在处理像图像或自然语言这样的数据集时，神经网络显示出强大的功能，因为它可以自动提取和创建特征，而无需手动的特征工程。
+
+// 打开 demo
+
+这是一个非常直观的关于神经网络的演示。我们的任务是训练一个神经网络，对对右边的橙色和蓝色的点进行分类。
+用人眼看过去,我们很直观的就能发现
+蓝色的点在中间,外面一圈都是橙色的点
+但是我们要如何让计算机自己去学到这一个规则呢?
+这个时候,我们设计了有两个隐藏层的神经网络
+第一个隐藏层有四个神经元,第二个隐藏层有两个神经元
+同时使用两个线性特征作为输入。
+// 点开始学习，在一百多个迭代之后这个神经网络就能学习到我们期望的特征
+// 将鼠标放在各个神经元上，可以看到每个神经元所学习到的特征已经他们和其他神经元之间的权重。
+除此之外，我们还有一些参数可以调整，例如学习率，可以理解为神经网络学习的步长，太大的值可能会学习不到最优解，太小的值可能会花费更多的时间来学习甚至永远学不到最优解
+那么我们现在就开始手写数字分类的任务
+
+---
+
+## MNIST 手写数字数据集
+
+- 总共7000张图片，包含1000张测试集
+- 10个分类，代表0～9
+
+![mnist handwritting digits](./media/minst.jpg)
+
+Note:
+这个数字节里面包含了大约7000张图片，
+每一张图片都是这种黑白的手写数字，
+分别一共有10种，
+代表0~9
+这7000张图片里面有6000张是训练级,1000张是测试级，我们只会使用训练级的图片来训练神经网络，测试级的图片不会给神经网络看,但会在评估阶段用来测试神经网络的性能，这样就能看一下这个神经网络对于它没见过的图片是否也能做到准确分类，
+
+---
+
+## 神经网络结构
+
+1. 输入层大小: 28*28 = 784
+2. 隐藏层
+3. 输出层大小: 10
+
+![mlp structure](./media/mlp.jpeg)
+
+Note:
+这是我们即将设计的神经网络的结构
+它首先在输入层接受一个维度为28*28,也就是784这样一个大小的输入
+然后它会经过几个隐藏层,最终来到有10个神经元的输出层
+完成手写数字识别的分类任务
+
+---
+
+## 神经网络优化器
+
+优化器的作用是寻找最佳的参数组合以最小化损失函数
+
+![optimizer](./media/optimizer.gif)
+
+---
+
+## 代码讲解
+
+```python [0-6|8-14|16-20|18|19|22-27]
+import torch
+import torchvision
+import torch.nn as nn
+import torch.optim as optim
+from torchvision import datasets, transforms
+from torch.utils.data import DataLoader
+
+# 检查设备
+device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
+print('Using device:', device)
+# 设置超参数
+batch_size = 64
+learning_rate = 0.01
+epochs = 5
+
+# 设置数据集的变换
+transform = transforms.Compose([
+    transforms.ToTensor(),
+    transforms.Normalize((0,), (1,))
+])
+
+#加载数据集
+train_dataset = datasets.MNIST(root='./data_mlp', train=True, transform=transform, download=True)
+test_dataset = datasets.MNIST(root='./data_mlp', train=False, transform=transform, download=True)
+
+train_loader = DataLoader(train_dataset, batch_size=batch_size, shuffle=True)
+test_loader = DataLoader(test_dataset, batch_size=batch_size, shuffle=False)
+```
+
+Note:
+0-6 首先前后行我们载入一些需要用到的库 包括神经网络层,优化器,数据集需要用到的工具
+8-14
+然后初始化一些变量和参数
+这里用了一段代码自动判断CUDA显卡设备是否可用
+如果不可用的话则会选择CPU进行运算
+超参数的这个batch_size指的是每一次迭代中
+这个神经网络会一次性看多少张图片
+我们神经网络训练数据的时候不是一张图一张图的去看
+而是多张图放在一个批次里一起去看
+一般來說,Batch Size會盡可能設置得高,讓顯卡充分發揮它的並行運算能力,但是也要看情況具體分析,太高的話可能導致過擬核,影响模型最终的学习效果
+Learning Rate就是学习率,我们刚才讲过的
+指的是神经网络一次调整
+自身权重的步长
+数值越大,学得越快
+但是太大也可能会导致完全无法学习
+最后一个参数Epoch,代表需要学习整个数据集多少遍
+数字太小的话
+训练过程可能
+还没学到这些数字的特征就结束了 数字太大的话
+他可能会把数据集里面的所有噪音都记住 最终在测试级上表现效果不佳
+16-20
+Transform这一部分是告诉DataLoader
+我们应该在读取数据，在喂给神经网络之前，做哪一些格式变换操作
+18
+首先我们会把这些整数类型的数据转换成Tensor,也就是PyTorch能够进行运算的向量类型数据
+19
+然后我们会调用Normalize把它归一化成均值为0,标准差为1的数据。
+因为在某些数据集中，数值之间的尺度是不匹配的，例如我们分析身高和机票价格之间的关系，身高的单位是米，一个人身高撑死最多2米多，但是机票价格从几千到几万不等。这时候进行normalize就非常有必要。
+这样经过调整之后,输入神经网络的数值就在一个合理的范围之内
+
+---
+
+## 代码讲解
+
+```python [1-14|16-17|19-21|23-32|34-46]
+# 定义MLP模型
+class MLP(nn.Module):
+    def __init__(self):
+        super(MLP, self).__init__()
+        self.fc1 = nn.Linear(28*28, 512)
+        self.fc2 = nn.Linear(512, 256)
+        self.fc3 = nn.Linear(256, 10)
+
+    def forward(self, x):
+        x = x.view(-1, 28*28)
+        x = torch.relu(self.fc1(x))
+        x = torch.relu(self.fc2(x))
+        x = self.fc3(x)
+        return x
+
+# 创建模型实例并将其移到正确的设备上
+model = MLP().to(device)
+
+# 定义损失函数和优化器
+criterion = nn.CrossEntropyLoss()
+optimizer = optim.SGD(model.parameters(), lr=learning_rate)
+
+# 训练模型
+for epoch in range(epochs):
+    model.train()
+    for batch_idx, (data, target) in enumerate(train_loader):
+        data, target = data.to(device), target.to(device)
+        optimizer.zero_grad()
+        output = model(data)
+        loss = criterion(output, target)
+        loss.backward()
+        optimizer.step()
+
+# 测试模型
+model.eval()
+test_loss = 0
+correct = 0
+with torch.no_grad():
+    for data, target in test_loader:
+        data, target = data.to(device), target.to(device)
+        output = model(data)
+        test_loss += criterion(output, target).item()
+        pred = output.argmax(dim=1, keepdim=True)
+        correct += pred.eq(target.view_as(pred)).sum().item()
+
+test_loss /= len(test_loader.dataset)
+```

css/print/paper.scss

@@ -1,42 +1,30 @@
-/* Default Print Stylesheet Template
-   by Rob Glazebrook of CSSnewbie.com
-   Last Updated: June 4, 2008
-
-   Feel free (nay, compelled) to edit, append, and
-   manipulate this file as you see fit. */
 
 @media print {
 	html:not(.print-pdf) {
-
+		overflow: visible;
-		background: #fff;
 		width: auto;
 		height: auto;
-		overflow: visible;
 
 		body {
-			background: #fff;
+			margin: 0;
-			font-size: 20pt;
-			width: auto;
-			height: auto;
-			border: 0;
-			margin: 0 5%;
 			padding: 0;
 			overflow: visible;
-			float: none !important;
+		}
 	}
 
-		.nestedarrow,
+	html:not(.print-pdf) .reveal {
+		background: #fff;
+		font-size: 20pt;
+
 		.controls,
-		.fork-reveal,
-		.share-reveal,
 		.state-background,
-		.reveal .progress,
+		.progress,
-		.reveal .backgrounds,
+		.backgrounds,
-		.reveal .slide-number {
+		.slide-number {
 			display: none !important;
 		}
 
-		body, p, td, li {
+		p, td, li {
 			font-size: 20pt!important;
 			color: #000;
 		}
@@ -49,7 +37,6 @@
 			letter-spacing: normal;
 		}
 
-		/* Need to reduce the size of the fonts for printing */
 		h1 { font-size: 28pt !important; }
 		h2 { font-size: 24pt !important; }
 		h3 { font-size: 22pt !important; }
@@ -74,18 +61,19 @@
 			margin: 0;
 			text-align: left !important;
 		}
-		.reveal pre,
+		pre,
-		.reveal table {
+		table {
 			margin-left: 0;
 			margin-right: 0;
 		}
-		.reveal pre code {
+		pre code {
 			padding: 20px;
 		}
-		.reveal blockquote {
+		blockquote {
 			margin: 20px 0;
 		}
-		.reveal .slides {
+
+		.slides {
 			position: static !important;
 			width: auto !important;
 			height: auto !important;
@@ -106,7 +94,7 @@
 
 			perspective-origin: 50% 50%;
 		}
-		.reveal .slides section {
+		.slides section {
 			visibility: visible !important;
 			position: static !important;
 			width: auto !important;
@@ -129,24 +117,24 @@
 			transform: none !important;
 			transition: none !important;
 		}
-		.reveal .slides section.stack {
+		.slides section.stack {
 			padding: 0 !important;
 		}
-		.reveal section:last-of-type {
+		.slides section:last-of-type {
 			page-break-after: avoid !important;
 		}
-		.reveal section .fragment {
+		.slides section .fragment {
 			opacity: 1 !important;
 			visibility: visible !important;
 
 			transform: none !important;
 		}
 
-		.reveal .r-fit-text {
+		.r-fit-text {
 			white-space: normal !important;
 		}
 
-		.reveal section img {
+		section img {
 			display: block;
 			margin: 15px 0px;
 			background: rgba(255,255,255,1);
@@ -154,11 +142,11 @@
 			box-shadow: none;
 		}
 
-		.reveal section small {
+		section small {
 			font-size: 0.8em;
 		}
 
-		.reveal .hljs {
+		.hljs {
 			max-height: 100%;
 			white-space: pre-wrap;
 			word-wrap: break-word;
@@ -166,11 +154,11 @@
 			font-size: 15pt;
 		}
 
-		.reveal .hljs .hljs-ln-numbers {
+		.hljs .hljs-ln-numbers {
 			white-space: nowrap;
 		}
 
-		.reveal .hljs td {
+		.hljs td {
 			font-size: inherit !important;
 			color: inherit !important;
 		}

css/print/pdf.scss

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

css/reveal.scss

@@ -19,6 +19,7 @@ html.reveal-full-page {
 	height: 100%;
 	height: 100vh;
 	height: calc( var(--vh, 1vh) * 100 );
+	height: 100svh;
 	overflow: hidden;
 }
 
@@ -31,6 +32,8 @@ html.reveal-full-page {
 
 	background-color: #fff;
 	color: #000;
+
+	--r-controls-spacing: 12px;
 }
 
 // Force the presentation to cover the full viewport when we
@@ -48,11 +51,14 @@ html.reveal-full-page {
  * VIEW FRAGMENTS
  *********************************************/
 
-.reveal .slides section .fragment {
+.reveal .fragment {
+	transition: all .2s ease;
+
+	&:not(.custom) {
 		opacity: 0;
 		visibility: hidden;
-	transition: all .2s ease;
 		will-change: opacity;
+	}
 
 	&.visible {
 		opacity: 1;
@@ -64,7 +70,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.grow {
+.reveal .fragment.grow {
 	opacity: 1;
 	visibility: inherit;
 
@@ -73,7 +79,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.shrink {
+.reveal .fragment.shrink {
 	opacity: 1;
 	visibility: inherit;
 
@@ -82,7 +88,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.zoom-in {
+.reveal .fragment.zoom-in {
 	transform: scale( 0.1 );
 
 	&.visible {
@@ -90,7 +96,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-out {
+.reveal .fragment.fade-out {
 	opacity: 1;
 	visibility: inherit;
 
@@ -100,7 +106,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.semi-fade-out {
+.reveal .fragment.semi-fade-out {
 	opacity: 1;
 	visibility: inherit;
 
@@ -110,7 +116,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.strike {
+.reveal .fragment.strike {
 	opacity: 1;
 	visibility: inherit;
 
@@ -119,7 +125,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-up {
+.reveal .fragment.fade-up {
 	transform: translate(0, 40px);
 
 	&.visible {
@@ -127,7 +133,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-down {
+.reveal .fragment.fade-down {
 	transform: translate(0, -40px);
 
 	&.visible {
@@ -135,7 +141,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-right {
+.reveal .fragment.fade-right {
 	transform: translate(-40px, 0);
 
 	&.visible {
@@ -143,7 +149,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-left {
+.reveal .fragment.fade-left {
 	transform: translate(40px, 0);
 
 	&.visible {
@@ -151,8 +157,8 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-in-then-out,
+.reveal .fragment.fade-in-then-out,
-.reveal .slides section .fragment.current-visible {
+.reveal .fragment.current-visible {
 	opacity: 0;
 	visibility: hidden;
 
@@ -162,7 +168,7 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.fade-in-then-semi-out {
+.reveal .fragment.fade-in-then-semi-out {
 	opacity: 0;
 	visibility: hidden;
 
@@ -177,32 +183,32 @@ html.reveal-full-page {
 	}
 }
 
-.reveal .slides section .fragment.highlight-red,
+.reveal .fragment.highlight-red,
-.reveal .slides section .fragment.highlight-current-red,
+.reveal .fragment.highlight-current-red,
-.reveal .slides section .fragment.highlight-green,
+.reveal .fragment.highlight-green,
-.reveal .slides section .fragment.highlight-current-green,
+.reveal .fragment.highlight-current-green,
-.reveal .slides section .fragment.highlight-blue,
+.reveal .fragment.highlight-blue,
-.reveal .slides section .fragment.highlight-current-blue {
+.reveal .fragment.highlight-current-blue {
 	opacity: 1;
 	visibility: inherit;
 }
-	.reveal .slides section .fragment.highlight-red.visible {
+	.reveal .fragment.highlight-red.visible {
 		color: #ff2c2d
 	}
-	.reveal .slides section .fragment.highlight-green.visible {
+	.reveal .fragment.highlight-green.visible {
 		color: #17ff2e;
 	}
-	.reveal .slides section .fragment.highlight-blue.visible {
+	.reveal .fragment.highlight-blue.visible {
 		color: #1b91ff;
 	}
 
-.reveal .slides section .fragment.highlight-current-red.current-fragment {
+.reveal .fragment.highlight-current-red.current-fragment {
 	color: #ff2c2d
 }
-.reveal .slides section .fragment.highlight-current-green.current-fragment {
+.reveal .fragment.highlight-current-green.current-fragment {
 	color: #17ff2e;
 }
-.reveal .slides section .fragment.highlight-current-blue.current-fragment {
+.reveal .fragment.highlight-current-blue.current-fragment {
 	color: #1b91ff;
 }
 
@@ -268,13 +274,11 @@ $controlsArrowAngleActive: 36deg;
 }
 
 .reveal .controls {
-	$spacing: 12px;
-
 	display: none;
 	position: absolute;
 	top: auto;
-	bottom: $spacing;
+	bottom: var(--r-controls-spacing);
-	right: $spacing;
+	right: var(--r-controls-spacing);
 	left: auto;
 	z-index: 11;
 	color: #000;
@@ -506,7 +510,9 @@ $controlsArrowAngleActive: 36deg;
 // Edge aligned controls layout
 @media screen and (min-width: 500px) {
 
-	$spacing: 0.8em;
+	.reveal-viewport {
+		--r-controls-spacing: 0.8em;
+	}
 
 	.reveal .controls[data-controls-layout="edges"] {
 		& {
@@ -526,24 +532,24 @@ $controlsArrowAngleActive: 36deg;
 
 		.navigate-left {
 			top: 50%;
-			left: $spacing;
+			left: var(--r-controls-spacing);
 			margin-top: -$controlArrowSize*0.5;
 		}
 
 		.navigate-right {
 			top: 50%;
-			right: $spacing;
+			right: var(--r-controls-spacing);
 			margin-top: -$controlArrowSize*0.5;
 		}
 
 		.navigate-up {
-			top: $spacing;
+			top: var(--r-controls-spacing);
 			left: 50%;
 			margin-left: -$controlArrowSize*0.5;
 		}
 
 		.navigate-down {
-			bottom: $spacing - $controlArrowSpacing + 0.3em;
+			bottom: calc(var(--r-controls-spacing) - #{$controlArrowSpacing} + 0.3em);
 			left: 50%;
 			margin-left: -$controlArrowSize*0.5;
 		}
@@ -1439,7 +1445,8 @@ $overlayHeaderPadding: 5px;
 	width: 100%;
 	height: 100%;
 	z-index: 1000;
-	background: rgba( 0, 0, 0, 0.9 );
+	background: rgba( 0, 0, 0, 0.95 );
+	backdrop-filter: blur( 6px );
 	transition: all 0.3s ease;
 }
 
@@ -1583,7 +1590,6 @@ $overlayHeaderPadding: 5px;
 		padding-bottom: 20px;
 	}
 
-
 /*********************************************
  * PLAYBACK COMPONENT
  *********************************************/
@@ -1633,6 +1639,10 @@ $overlayHeaderPadding: 5px;
 	opacity: 0.4;
 }
 
+.reveal .hljs.has-highlights.fragment {
+	transition: all .2s ease;
+}
+
 .reveal .hljs:not(:first-child).fragment {
 	position: absolute;
 	top: 0;
@@ -1796,6 +1806,43 @@ $notesWidthPercent: 25%;
 }
 
 
+/*********************************************
+ * JUMP-TO-SLIDE COMPONENT
+ *********************************************/
+
+ .reveal .jump-to-slide {
+	position: absolute;
+	top: 15px;
+	left: 15px;
+	z-index: 30;
+	font-size: 32px;
+	-webkit-tap-highlight-color: rgba( 0, 0, 0, 0 );
+}
+
+.reveal .jump-to-slide-input {
+	background: transparent;
+	padding: 8px;
+	font-size: inherit;
+	color: currentColor;
+	border: 0;
+}
+.reveal .jump-to-slide-input::placeholder {
+	color: currentColor;
+	opacity: 0.5;
+}
+
+.reveal.has-dark-background .jump-to-slide-input {
+	color: #fff;
+}
+.reveal.has-light-background .jump-to-slide-input {
+	color: #222;
+}
+
+.reveal .jump-to-slide-input:focus {
+	outline: none;
+}
+
+
 /*********************************************
  * ZOOM PLUGIN
  *********************************************/
@@ -1820,6 +1867,239 @@ $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;
+	}
+
+	.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
  *********************************************/

css/theme/source/beige.scss

@@ -27,6 +27,9 @@ $linkColorHover: lighten( $linkColor, 20% );
 $selectionBackgroundColor: rgba(79, 64, 28, 0.99);
 $heading1TextShadow: 0 1px 0 #ccc, 0 2px 0 #c9c9c9, 0 3px 0 #bbb, 0 4px 0 #b9b9b9, 0 5px 0 #aaa, 0 6px 1px rgba(0,0,0,.1), 0 0 5px rgba(0,0,0,.1), 0 1px 3px rgba(0,0,0,.3), 0 3px 5px rgba(0,0,0,.2), 0 5px 10px rgba(0,0,0,.25), 0 20px 20px rgba(0,0,0,.15);
 
+$overlayElementBgColor: 0, 0, 0;
+$overlayElementFgColor: 240, 240, 240;
+
 // Background generator
 @mixin bodyBackground() {
 	@include radial-gradient( rgba(247,242,211,1), rgba(255,255,255,1) );

css/theme/source/black-contrast.scss

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

css/theme/source/black.scss

@@ -30,7 +30,7 @@ $headingTextTransform: uppercase;
 $headingFontWeight: 600;
 $linkColor: #42affa;
 $linkColorHover: lighten( $linkColor, 15% );
-$selectionBackgroundColor: lighten( $linkColor, 25% );
+$selectionBackgroundColor: rgba( $linkColor, 0.75 );
 
 $heading1Size: 2.5em;
 $heading2Size: 1.6em;

css/theme/source/dracula.scss

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

css/theme/source/moon.scss

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

css/theme/source/serif.scss

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

css/theme/source/simple.scss

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

css/theme/source/sky.scss

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

css/theme/source/solarized.scss

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

css/theme/source/white-contrast.scss

@@ -0,0 +1,52 @@
+/**
+ * White compact & high contrast reveal.js theme, with headers not in capitals.
+ *
+ * By Peter Kehl. Based on white.(s)css by Hakim El Hattab, http://hakim.se
+ *
+ * - Keep the source similar to black.css - for easy comparison.
+ * - $mainFontSize controls code blocks, too (although under some ratio).
+ */
+
+
+// Default mixins and settings -----------------
+@import "../template/mixins";
+@import "../template/settings";
+// ---------------------------------------------
+
+
+// Include theme-specific fonts
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
+
+
+// Override theme settings (see ../template/settings.scss)
+$backgroundColor: #fff;
+
+$mainColor: #000;
+$headingColor: #000;
+
+$mainFontSize: 42px;
+$mainFont: 'Source Sans Pro', Helvetica, sans-serif;
+$headingFont: 'Source Sans Pro', Helvetica, sans-serif;
+$headingTextShadow: none;
+$headingLetterSpacing: normal;
+$headingTextTransform: uppercase;
+$headingFontWeight: 600;
+$linkColor: #2a76dd;
+$linkColorHover: lighten( $linkColor, 15% );
+$selectionBackgroundColor: lighten( $linkColor, 25% );
+
+$heading1Size: 2.5em;
+$heading2Size: 1.6em;
+$heading3Size: 1.3em;
+$heading4Size: 1.0em;
+
+$overlayElementBgColor: 0, 0, 0;
+$overlayElementFgColor: 240, 240, 240;
+
+// Change text colors against dark slide backgrounds
+@include dark-bg-text-color(#fff);
+
+
+// Theme template ------------------------------
+@import "../template/theme";
+// ---------------------------------------------

css/theme/source/white.scss

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

css/theme/template/exposer.scss

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

css/theme/template/settings.scss

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

demo.html

@@ -86,7 +86,7 @@
 
 				<section data-auto-animate>
 					<h2 data-id="code-title">Pretty Code</h2>
-					<pre data-id="code-animation"><code class="hljs" data-trim data-line-numbers>
+					<pre data-id="code-animation"><code class="hljs javascript" data-trim data-line-numbers>
 						import React, { useState } from 'react';
 
 						function Example() {
@@ -101,8 +101,8 @@
 				</section>
 
 				<section data-auto-animate>
-					<h2 data-id="code-title">With animations</h2>
+					<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">
+					<pre data-id="code-animation"><code class="hljs javascript" data-trim data-line-numbers="|4,8-11|17|22-24"><script type="text/template">
 						import React, { useState } from 'react';
 
 						function Example() {
@@ -181,14 +181,14 @@
 
 				<section data-markdown>
 					<script type="text/template">
-						## Markdown support
+						## Markdown Support
 
 						Write content using inline or external Markdown.
 						Instructions and more info available in the [docs](https://revealjs.com/markdown/).
 
 						```html []
 						<section data-markdown>
-						  ## Markdown support
+						  ## Markdown Support
 
 						  Write content using inline or external Markdown.
 						  Instructions and more info available in the [docs](https://revealjs.com/markdown/).
@@ -249,17 +249,17 @@
 					<p>
 						reveal.js comes with a few themes built in: <br>
 						<!-- Hacks to swap themes after the page has loaded. Not flexible and only intended for the reveal.js demo deck. -->
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/theme/black.css'); return false;">Black (default)</a> -
+						<a href="#/themes" 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="#/themes" 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="#/themes" 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="#/themes" 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="#/themes" 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="#/themes" 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="#/themes" 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="#/themes" 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="#/themes" 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="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/moon.css'); return false;">Moon</a> -
-						<a href="#" onclick="document.getElementById('theme').setAttribute('href','dist/theme/solarized.css'); return false;">Solarized</a>
+						<a href="#/themes" onclick="document.getElementById('theme').setAttribute('href','dist/theme/solarized.css'); return false;">Solarized</a>
 					</p>
 				</section>
 

dist/theme/beige.css

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

dist/theme/black-contrast.css

@@ -0,0 +1,362 @@
+/**
+ * Black compact & high contrast reveal.js theme, with headers not in capitals.
+ *
+ * By Peter Kehl. Based on black.(s)css by Hakim El Hattab, http://hakim.se
+ *
+ * - Keep the source similar to black.css - for easy comparison.
+ * - $mainFontSize controls code blocks, too (although under some ratio).
+ */
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
+section.has-light-background, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4, section.has-light-background h5, section.has-light-background h6 {
+  color: #000;
+}
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+:root {
+  --r-background-color: #000000;
+  --r-main-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-main-font-size: 42px;
+  --r-main-color: #fff;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-heading-color: #fff;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: 600;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 2.5em;
+  --r-heading2-size: 1.6em;
+  --r-heading3-size: 1.3em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #42affa;
+  --r-link-color-dark: #068de9;
+  --r-link-color-hover: #8dcffc;
+  --r-selection-background-color: #bee4fd;
+  --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 240, 240, 240;
+  --r-overlay-element-fg-color: 0, 0, 0;
+}
+
+.reveal-viewport {
+  background: #000000;
+  background-color: var(--r-background-color);
+}
+
+.reveal {
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
+  font-weight: normal;
+  color: var(--r-main-color);
+}
+
+.reveal ::selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal ::-moz-selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal .slides section,
+.reveal .slides section > section {
+  line-height: 1.3;
+  font-weight: inherit;
+}
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
+
+.reveal h1 {
+  font-size: var(--r-heading1-size);
+}
+
+.reveal h2 {
+  font-size: var(--r-heading2-size);
+}
+
+.reveal h3 {
+  font-size: var(--r-heading3-size);
+}
+
+.reveal h4 {
+  font-size: var(--r-heading4-size);
+}
+
+.reveal h1 {
+  text-shadow: var(--r-heading1-text-shadow);
+}
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: var(--r-block-margin) 0;
+  line-height: 1.3;
+}
+
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0;
+}
+
+/* Ensure certain elements are never larger than the slide itself */
+.reveal img,
+.reveal video,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%;
+}
+
+.reveal strong,
+.reveal b {
+  font-weight: bold;
+}
+
+.reveal em {
+  font-style: italic;
+}
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em;
+}
+
+.reveal ol {
+  list-style-type: decimal;
+}
+
+.reveal ul {
+  list-style-type: disc;
+}
+
+.reveal ul ul {
+  list-style-type: square;
+}
+
+.reveal ul ul ul {
+  list-style-type: circle;
+}
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px;
+}
+
+.reveal dt {
+  font-weight: bold;
+}
+
+.reveal dd {
+  margin-left: 40px;
+}
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: var(--r-block-margin) auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block;
+}
+
+.reveal q {
+  font-style: italic;
+}
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: var(--r-block-margin) auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: var(--r-code-font);
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
+
+.reveal code {
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+.reveal table th {
+  font-weight: bold;
+}
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid;
+}
+
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
+
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none;
+}
+
+.reveal sup {
+  vertical-align: super;
+  font-size: smaller;
+}
+
+.reveal sub {
+  vertical-align: sub;
+  font-size: smaller;
+}
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top;
+}
+
+.reveal small * {
+  vertical-align: top;
+}
+
+.reveal img {
+  margin: var(--r-block-margin) 0;
+}
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: var(--r-link-color);
+  text-decoration: none;
+  transition: color 0.15s ease;
+}
+
+.reveal a:hover {
+  color: var(--r-link-color-hover);
+  text-shadow: none;
+  border: none;
+}
+
+.reveal .roll span:after {
+  color: #fff;
+  background: var(--r-link-color-dark);
+}
+
+/*********************************************
+ * Frame helper
+ *********************************************/
+.reveal .r-frame {
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
+
+.reveal a .r-frame {
+  transition: all 0.15s linear;
+}
+
+.reveal a:hover .r-frame {
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls {
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2);
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/black.css

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

dist/theme/blood.css

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

dist/theme/dracula.css

@@ -0,0 +1,385 @@
+/**
+ * Dracula Dark theme for reveal.js.
+ * Based on https://draculatheme.com
+ */
+/**
+ * Dracula colors by Zeno Rocha
+ * https://draculatheme.com/contribute
+ */
+html * {
+  color-profile: sRGB;
+  rendering-intent: auto;
+}
+
+section.has-light-background, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4, section.has-light-background h5, section.has-light-background h6 {
+  color: #282A36;
+}
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+:root {
+  --r-background-color: #282A36;
+  --r-main-font: -apple-system, BlinkMacSystemFont, avenir next, avenir, segoe ui, helvetica neue, helvetica, Cantarell, Ubuntu, roboto, noto, arial, sans-serif;
+  --r-main-font-size: 40px;
+  --r-main-color: #F8F8F2;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: League Gothic, Impact, sans-serif;
+  --r-heading-color: #BD93F9;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: none;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: normal;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 3.77em;
+  --r-heading2-size: 2.11em;
+  --r-heading3-size: 1.55em;
+  --r-heading4-size: 1em;
+  --r-code-font: Fira Code, Menlo, Consolas, Monaco, Liberation Mono, Lucida Console, monospace;
+  --r-link-color: #FF79C6;
+  --r-link-color-dark: #ff2da5;
+  --r-link-color-hover: #8BE9FD;
+  --r-selection-background-color: #44475A;
+  --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 240, 240, 240;
+  --r-overlay-element-fg-color: 0, 0, 0;
+}
+
+.reveal-viewport {
+  background: #282A36;
+  background-color: var(--r-background-color);
+}
+
+.reveal {
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
+  font-weight: normal;
+  color: var(--r-main-color);
+}
+
+.reveal ::selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal ::-moz-selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal .slides section,
+.reveal .slides section > section {
+  line-height: 1.3;
+  font-weight: inherit;
+}
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
+
+.reveal h1 {
+  font-size: var(--r-heading1-size);
+}
+
+.reveal h2 {
+  font-size: var(--r-heading2-size);
+}
+
+.reveal h3 {
+  font-size: var(--r-heading3-size);
+}
+
+.reveal h4 {
+  font-size: var(--r-heading4-size);
+}
+
+.reveal h1 {
+  text-shadow: var(--r-heading1-text-shadow);
+}
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: var(--r-block-margin) 0;
+  line-height: 1.3;
+}
+
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0;
+}
+
+/* Ensure certain elements are never larger than the slide itself */
+.reveal img,
+.reveal video,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%;
+}
+
+.reveal strong,
+.reveal b {
+  font-weight: bold;
+}
+
+.reveal em {
+  font-style: italic;
+}
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em;
+}
+
+.reveal ol {
+  list-style-type: decimal;
+}
+
+.reveal ul {
+  list-style-type: disc;
+}
+
+.reveal ul ul {
+  list-style-type: square;
+}
+
+.reveal ul ul ul {
+  list-style-type: circle;
+}
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px;
+}
+
+.reveal dt {
+  font-weight: bold;
+}
+
+.reveal dd {
+  margin-left: 40px;
+}
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: var(--r-block-margin) auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block;
+}
+
+.reveal q {
+  font-style: italic;
+}
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: var(--r-block-margin) auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: var(--r-code-font);
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
+
+.reveal code {
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+.reveal table th {
+  font-weight: bold;
+}
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid;
+}
+
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
+
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none;
+}
+
+.reveal sup {
+  vertical-align: super;
+  font-size: smaller;
+}
+
+.reveal sub {
+  vertical-align: sub;
+  font-size: smaller;
+}
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top;
+}
+
+.reveal small * {
+  vertical-align: top;
+}
+
+.reveal img {
+  margin: var(--r-block-margin) 0;
+}
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: var(--r-link-color);
+  text-decoration: none;
+  transition: color 0.15s ease;
+}
+
+.reveal a:hover {
+  color: var(--r-link-color-hover);
+  text-shadow: none;
+  border: none;
+}
+
+.reveal .roll span:after {
+  color: #fff;
+  background: var(--r-link-color-dark);
+}
+
+/*********************************************
+ * Frame helper
+ *********************************************/
+.reveal .r-frame {
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
+
+.reveal a .r-frame {
+  transition: all 0.15s linear;
+}
+
+.reveal a:hover .r-frame {
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls {
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2);
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: var(--r-background-color);
+  }
+}
+:root {
+  --r-bold-color: #FFB86C;
+  --r-italic-color: #F1FA8C;
+  --r-inline-code-color: #50FA7B;
+  --r-list-bullet-color: #8BE9FD;
+}
+
+.reveal strong, .reveal b {
+  color: var(--r-bold-color);
+}
+.reveal em, .reveal i, .reveal blockquote {
+  color: var(--r-italic-color);
+}
+.reveal code {
+  color: var(--r-inline-code-color);
+}
+.reveal ul li::marker, .reveal ol li::marker {
+  color: var(--r-list-bullet-color);
+}

dist/theme/league.css

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

dist/theme/moon.css

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

dist/theme/night.css

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

dist/theme/serif.css

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

dist/theme/simple.css

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

dist/theme/sky.css

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

dist/theme/solarized.css

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

dist/theme/white-contrast.css

@@ -0,0 +1,362 @@
+/**
+ * White compact & high contrast reveal.js theme, with headers not in capitals.
+ *
+ * By Peter Kehl. Based on white.(s)css by Hakim El Hattab, http://hakim.se
+ *
+ * - Keep the source similar to black.css - for easy comparison.
+ * - $mainFontSize controls code blocks, too (although under some ratio).
+ */
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
+section.has-dark-background, section.has-dark-background h1, section.has-dark-background h2, section.has-dark-background h3, section.has-dark-background h4, section.has-dark-background h5, section.has-dark-background h6 {
+  color: #fff;
+}
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+:root {
+  --r-background-color: #fff;
+  --r-main-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-main-font-size: 42px;
+  --r-main-color: #000;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-heading-color: #000;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: 600;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 2.5em;
+  --r-heading2-size: 1.6em;
+  --r-heading3-size: 1.3em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #2a76dd;
+  --r-link-color-dark: #1a53a1;
+  --r-link-color-hover: #6ca0e8;
+  --r-selection-background-color: #98bdef;
+  --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 0, 0, 0;
+  --r-overlay-element-fg-color: 240, 240, 240;
+}
+
+.reveal-viewport {
+  background: #fff;
+  background-color: var(--r-background-color);
+}
+
+.reveal {
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
+  font-weight: normal;
+  color: var(--r-main-color);
+}
+
+.reveal ::selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal ::-moz-selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal .slides section,
+.reveal .slides section > section {
+  line-height: 1.3;
+  font-weight: inherit;
+}
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
+
+.reveal h1 {
+  font-size: var(--r-heading1-size);
+}
+
+.reveal h2 {
+  font-size: var(--r-heading2-size);
+}
+
+.reveal h3 {
+  font-size: var(--r-heading3-size);
+}
+
+.reveal h4 {
+  font-size: var(--r-heading4-size);
+}
+
+.reveal h1 {
+  text-shadow: var(--r-heading1-text-shadow);
+}
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: var(--r-block-margin) 0;
+  line-height: 1.3;
+}
+
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0;
+}
+
+/* Ensure certain elements are never larger than the slide itself */
+.reveal img,
+.reveal video,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%;
+}
+
+.reveal strong,
+.reveal b {
+  font-weight: bold;
+}
+
+.reveal em {
+  font-style: italic;
+}
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em;
+}
+
+.reveal ol {
+  list-style-type: decimal;
+}
+
+.reveal ul {
+  list-style-type: disc;
+}
+
+.reveal ul ul {
+  list-style-type: square;
+}
+
+.reveal ul ul ul {
+  list-style-type: circle;
+}
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px;
+}
+
+.reveal dt {
+  font-weight: bold;
+}
+
+.reveal dd {
+  margin-left: 40px;
+}
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: var(--r-block-margin) auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block;
+}
+
+.reveal q {
+  font-style: italic;
+}
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: var(--r-block-margin) auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: var(--r-code-font);
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
+
+.reveal code {
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+.reveal table th {
+  font-weight: bold;
+}
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid;
+}
+
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
+
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none;
+}
+
+.reveal sup {
+  vertical-align: super;
+  font-size: smaller;
+}
+
+.reveal sub {
+  vertical-align: sub;
+  font-size: smaller;
+}
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top;
+}
+
+.reveal small * {
+  vertical-align: top;
+}
+
+.reveal img {
+  margin: var(--r-block-margin) 0;
+}
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: var(--r-link-color);
+  text-decoration: none;
+  transition: color 0.15s ease;
+}
+
+.reveal a:hover {
+  color: var(--r-link-color-hover);
+  text-shadow: none;
+  border: none;
+}
+
+.reveal .roll span:after {
+  color: #fff;
+  background: var(--r-link-color-dark);
+}
+
+/*********************************************
+ * Frame helper
+ *********************************************/
+.reveal .r-frame {
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
+
+.reveal a .r-frame {
+  transition: all 0.15s linear;
+}
+
+.reveal a:hover .r-frame {
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls {
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2);
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: var(--r-background-color);
+  }
+}

dist/theme/white.css

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

dist/theme/white_contrast_compact_verbatim_headers.css

@@ -0,0 +1,360 @@
+/**
+ * White compact & high contrast reveal.js theme, with headers not in capitals.
+ *
+ * By Peter Kehl. Based on white.(s)css by Hakim El Hattab, http://hakim.se
+ *
+ * - Keep the source similar to black.css - for easy comparison.
+ * - $mainFontSize controls code blocks, too (although under some ratio).
+ */
+@import url(./fonts/source-sans-pro/source-sans-pro.css);
+section.has-dark-background, section.has-dark-background h1, section.has-dark-background h2, section.has-dark-background h3, section.has-dark-background h4, section.has-dark-background h5, section.has-dark-background h6 {
+  color: #fff;
+}
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+:root {
+  --r-background-color: #fff;
+  --r-main-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-main-font-size: 25px;
+  --r-main-color: #000;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Source Sans Pro, Helvetica, sans-serif;
+  --r-heading-color: #000;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: normal;
+  --r-heading-text-transform: none;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: 450;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 2.5em;
+  --r-heading2-size: 1.6em;
+  --r-heading3-size: 1.3em;
+  --r-heading4-size: 1em;
+  --r-code-font: monospace;
+  --r-link-color: #2a76dd;
+  --r-link-color-dark: #1a53a1;
+  --r-link-color-hover: #6ca0e8;
+  --r-selection-background-color: #98bdef;
+  --r-selection-color: #fff;
+}
+
+.reveal-viewport {
+  background: #fff;
+  background-color: var(--r-background-color);
+}
+
+.reveal {
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
+  font-weight: normal;
+  color: var(--r-main-color);
+}
+
+.reveal ::selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal ::-moz-selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal .slides section,
+.reveal .slides section > section {
+  line-height: 1.3;
+  font-weight: inherit;
+}
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
+
+.reveal h1 {
+  font-size: var(--r-heading1-size);
+}
+
+.reveal h2 {
+  font-size: var(--r-heading2-size);
+}
+
+.reveal h3 {
+  font-size: var(--r-heading3-size);
+}
+
+.reveal h4 {
+  font-size: var(--r-heading4-size);
+}
+
+.reveal h1 {
+  text-shadow: var(--r-heading1-text-shadow);
+}
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: var(--r-block-margin) 0;
+  line-height: 1.3;
+}
+
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0;
+}
+
+/* Ensure certain elements are never larger than the slide itself */
+.reveal img,
+.reveal video,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%;
+}
+
+.reveal strong,
+.reveal b {
+  font-weight: bold;
+}
+
+.reveal em {
+  font-style: italic;
+}
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em;
+}
+
+.reveal ol {
+  list-style-type: decimal;
+}
+
+.reveal ul {
+  list-style-type: disc;
+}
+
+.reveal ul ul {
+  list-style-type: square;
+}
+
+.reveal ul ul ul {
+  list-style-type: circle;
+}
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px;
+}
+
+.reveal dt {
+  font-weight: bold;
+}
+
+.reveal dd {
+  margin-left: 40px;
+}
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: var(--r-block-margin) auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block;
+}
+
+.reveal q {
+  font-style: italic;
+}
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: var(--r-block-margin) auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: var(--r-code-font);
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
+
+.reveal code {
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+.reveal table th {
+  font-weight: bold;
+}
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid;
+}
+
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
+
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none;
+}
+
+.reveal sup {
+  vertical-align: super;
+  font-size: smaller;
+}
+
+.reveal sub {
+  vertical-align: sub;
+  font-size: smaller;
+}
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top;
+}
+
+.reveal small * {
+  vertical-align: top;
+}
+
+.reveal img {
+  margin: var(--r-block-margin) 0;
+}
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: var(--r-link-color);
+  text-decoration: none;
+  transition: color 0.15s ease;
+}
+
+.reveal a:hover {
+  color: var(--r-link-color-hover);
+  text-shadow: none;
+  border: none;
+}
+
+.reveal .roll span:after {
+  color: #fff;
+  background: var(--r-link-color-dark);
+}
+
+/*********************************************
+ * Frame helper
+ *********************************************/
+.reveal .r-frame {
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
+
+.reveal a .r-frame {
+  transition: all 0.15s linear;
+}
+
+.reveal a:hover .r-frame {
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls {
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2);
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: var(--r-background-color);
+  }
+}

examples/500-slides.html

@@ -0,0 +1,526 @@
+<!doctype html>
+<html lang="en">
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - 500 slides</title>
+
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../dist/theme/black.css">
+	</head>
+
+	<body>
+		<div class="reveal">
+			<div class="slides">
+				<section><h1>1</h1></section>
+				<section><h1>2</h1></section>
+				<section><h1>3</h1></section>
+				<section><h1>4</h1></section>
+				<section><h1>5</h1></section>
+				<section><h1>6</h1></section>
+				<section><h1>7</h1></section>
+				<section><h1>8</h1></section>
+				<section><h1>9</h1></section>
+				<section><h1>10</h1></section>
+				<section><h1>11</h1></section>
+				<section><h1>12</h1></section>
+				<section><h1>13</h1></section>
+				<section><h1>14</h1></section>
+				<section><h1>15</h1></section>
+				<section><h1>16</h1></section>
+				<section><h1>17</h1></section>
+				<section><h1>18</h1></section>
+				<section><h1>19</h1></section>
+				<section><h1>20</h1></section>
+				<section><h1>21</h1></section>
+				<section><h1>22</h1></section>
+				<section><h1>23</h1></section>
+				<section><h1>24</h1></section>
+				<section><h1>25</h1></section>
+				<section><h1>26</h1></section>
+				<section><h1>27</h1></section>
+				<section><h1>28</h1></section>
+				<section><h1>29</h1></section>
+				<section><h1>30</h1></section>
+				<section><h1>31</h1></section>
+				<section><h1>32</h1></section>
+				<section><h1>33</h1></section>
+				<section><h1>34</h1></section>
+				<section><h1>35</h1></section>
+				<section><h1>36</h1></section>
+				<section><h1>37</h1></section>
+				<section><h1>38</h1></section>
+				<section><h1>39</h1></section>
+				<section><h1>40</h1></section>
+				<section><h1>41</h1></section>
+				<section><h1>42</h1></section>
+				<section><h1>43</h1></section>
+				<section><h1>44</h1></section>
+				<section><h1>45</h1></section>
+				<section><h1>46</h1></section>
+				<section><h1>47</h1></section>
+				<section><h1>48</h1></section>
+				<section><h1>49</h1></section>
+				<section><h1>50</h1></section>
+				<section><h1>51</h1></section>
+				<section><h1>52</h1></section>
+				<section><h1>53</h1></section>
+				<section><h1>54</h1></section>
+				<section><h1>55</h1></section>
+				<section><h1>56</h1></section>
+				<section><h1>57</h1></section>
+				<section><h1>58</h1></section>
+				<section><h1>59</h1></section>
+				<section><h1>60</h1></section>
+				<section><h1>61</h1></section>
+				<section><h1>62</h1></section>
+				<section><h1>63</h1></section>
+				<section><h1>64</h1></section>
+				<section><h1>65</h1></section>
+				<section><h1>66</h1></section>
+				<section><h1>67</h1></section>
+				<section><h1>68</h1></section>
+				<section><h1>69</h1></section>
+				<section><h1>70</h1></section>
+				<section><h1>71</h1></section>
+				<section><h1>72</h1></section>
+				<section><h1>73</h1></section>
+				<section><h1>74</h1></section>
+				<section><h1>75</h1></section>
+				<section><h1>76</h1></section>
+				<section><h1>77</h1></section>
+				<section><h1>78</h1></section>
+				<section><h1>79</h1></section>
+				<section><h1>80</h1></section>
+				<section><h1>81</h1></section>
+				<section><h1>82</h1></section>
+				<section><h1>83</h1></section>
+				<section><h1>84</h1></section>
+				<section><h1>85</h1></section>
+				<section><h1>86</h1></section>
+				<section><h1>87</h1></section>
+				<section><h1>88</h1></section>
+				<section><h1>89</h1></section>
+				<section><h1>90</h1></section>
+				<section><h1>91</h1></section>
+				<section><h1>92</h1></section>
+				<section><h1>93</h1></section>
+				<section><h1>94</h1></section>
+				<section><h1>95</h1></section>
+				<section><h1>96</h1></section>
+				<section><h1>97</h1></section>
+				<section><h1>98</h1></section>
+				<section><h1>99</h1></section>
+				<section><h1>100</h1></section>
+				<section><h1>101</h1></section>
+				<section><h1>102</h1></section>
+				<section><h1>103</h1></section>
+				<section><h1>104</h1></section>
+				<section><h1>105</h1></section>
+				<section><h1>106</h1></section>
+				<section><h1>107</h1></section>
+				<section><h1>108</h1></section>
+				<section><h1>109</h1></section>
+				<section><h1>110</h1></section>
+				<section><h1>111</h1></section>
+				<section><h1>112</h1></section>
+				<section><h1>113</h1></section>
+				<section><h1>114</h1></section>
+				<section><h1>115</h1></section>
+				<section><h1>116</h1></section>
+				<section><h1>117</h1></section>
+				<section><h1>118</h1></section>
+				<section><h1>119</h1></section>
+				<section><h1>120</h1></section>
+				<section><h1>121</h1></section>
+				<section><h1>122</h1></section>
+				<section><h1>123</h1></section>
+				<section><h1>124</h1></section>
+				<section><h1>125</h1></section>
+				<section><h1>126</h1></section>
+				<section><h1>127</h1></section>
+				<section><h1>128</h1></section>
+				<section><h1>129</h1></section>
+				<section><h1>130</h1></section>
+				<section><h1>131</h1></section>
+				<section><h1>132</h1></section>
+				<section><h1>133</h1></section>
+				<section><h1>134</h1></section>
+				<section><h1>135</h1></section>
+				<section><h1>136</h1></section>
+				<section><h1>137</h1></section>
+				<section><h1>138</h1></section>
+				<section><h1>139</h1></section>
+				<section><h1>140</h1></section>
+				<section><h1>141</h1></section>
+				<section><h1>142</h1></section>
+				<section><h1>143</h1></section>
+				<section><h1>144</h1></section>
+				<section><h1>145</h1></section>
+				<section><h1>146</h1></section>
+				<section><h1>147</h1></section>
+				<section><h1>148</h1></section>
+				<section><h1>149</h1></section>
+				<section><h1>150</h1></section>
+				<section><h1>151</h1></section>
+				<section><h1>152</h1></section>
+				<section><h1>153</h1></section>
+				<section><h1>154</h1></section>
+				<section><h1>155</h1></section>
+				<section><h1>156</h1></section>
+				<section><h1>157</h1></section>
+				<section><h1>158</h1></section>
+				<section><h1>159</h1></section>
+				<section><h1>160</h1></section>
+				<section><h1>161</h1></section>
+				<section><h1>162</h1></section>
+				<section><h1>163</h1></section>
+				<section><h1>164</h1></section>
+				<section><h1>165</h1></section>
+				<section><h1>166</h1></section>
+				<section><h1>167</h1></section>
+				<section><h1>168</h1></section>
+				<section><h1>169</h1></section>
+				<section><h1>170</h1></section>
+				<section><h1>171</h1></section>
+				<section><h1>172</h1></section>
+				<section><h1>173</h1></section>
+				<section><h1>174</h1></section>
+				<section><h1>175</h1></section>
+				<section><h1>176</h1></section>
+				<section><h1>177</h1></section>
+				<section><h1>178</h1></section>
+				<section><h1>179</h1></section>
+				<section><h1>180</h1></section>
+				<section><h1>181</h1></section>
+				<section><h1>182</h1></section>
+				<section><h1>183</h1></section>
+				<section><h1>184</h1></section>
+				<section><h1>185</h1></section>
+				<section><h1>186</h1></section>
+				<section><h1>187</h1></section>
+				<section><h1>188</h1></section>
+				<section><h1>189</h1></section>
+				<section><h1>190</h1></section>
+				<section><h1>191</h1></section>
+				<section><h1>192</h1></section>
+				<section><h1>193</h1></section>
+				<section><h1>194</h1></section>
+				<section><h1>195</h1></section>
+				<section><h1>196</h1></section>
+				<section><h1>197</h1></section>
+				<section><h1>198</h1></section>
+				<section><h1>199</h1></section>
+				<section><h1>200</h1></section>
+				<section><h1>201</h1></section>
+				<section><h1>202</h1></section>
+				<section><h1>203</h1></section>
+				<section><h1>204</h1></section>
+				<section><h1>205</h1></section>
+				<section><h1>206</h1></section>
+				<section><h1>207</h1></section>
+				<section><h1>208</h1></section>
+				<section><h1>209</h1></section>
+				<section><h1>210</h1></section>
+				<section><h1>211</h1></section>
+				<section><h1>212</h1></section>
+				<section><h1>213</h1></section>
+				<section><h1>214</h1></section>
+				<section><h1>215</h1></section>
+				<section><h1>216</h1></section>
+				<section><h1>217</h1></section>
+				<section><h1>218</h1></section>
+				<section><h1>219</h1></section>
+				<section><h1>220</h1></section>
+				<section><h1>221</h1></section>
+				<section><h1>222</h1></section>
+				<section><h1>223</h1></section>
+				<section><h1>224</h1></section>
+				<section><h1>225</h1></section>
+				<section><h1>226</h1></section>
+				<section><h1>227</h1></section>
+				<section><h1>228</h1></section>
+				<section><h1>229</h1></section>
+				<section><h1>230</h1></section>
+				<section><h1>231</h1></section>
+				<section><h1>232</h1></section>
+				<section><h1>233</h1></section>
+				<section><h1>234</h1></section>
+				<section><h1>235</h1></section>
+				<section><h1>236</h1></section>
+				<section><h1>237</h1></section>
+				<section><h1>238</h1></section>
+				<section><h1>239</h1></section>
+				<section><h1>240</h1></section>
+				<section><h1>241</h1></section>
+				<section><h1>242</h1></section>
+				<section><h1>243</h1></section>
+				<section><h1>244</h1></section>
+				<section><h1>245</h1></section>
+				<section><h1>246</h1></section>
+				<section><h1>247</h1></section>
+				<section><h1>248</h1></section>
+				<section><h1>249</h1></section>
+				<section><h1>250</h1></section>
+				<section><h1>251</h1></section>
+				<section><h1>252</h1></section>
+				<section><h1>253</h1></section>
+				<section><h1>254</h1></section>
+				<section><h1>255</h1></section>
+				<section><h1>256</h1></section>
+				<section><h1>257</h1></section>
+				<section><h1>258</h1></section>
+				<section><h1>259</h1></section>
+				<section><h1>260</h1></section>
+				<section><h1>261</h1></section>
+				<section><h1>262</h1></section>
+				<section><h1>263</h1></section>
+				<section><h1>264</h1></section>
+				<section><h1>265</h1></section>
+				<section><h1>266</h1></section>
+				<section><h1>267</h1></section>
+				<section><h1>268</h1></section>
+				<section><h1>269</h1></section>
+				<section><h1>270</h1></section>
+				<section><h1>271</h1></section>
+				<section><h1>272</h1></section>
+				<section><h1>273</h1></section>
+				<section><h1>274</h1></section>
+				<section><h1>275</h1></section>
+				<section><h1>276</h1></section>
+				<section><h1>277</h1></section>
+				<section><h1>278</h1></section>
+				<section><h1>279</h1></section>
+				<section><h1>280</h1></section>
+				<section><h1>281</h1></section>
+				<section><h1>282</h1></section>
+				<section><h1>283</h1></section>
+				<section><h1>284</h1></section>
+				<section><h1>285</h1></section>
+				<section><h1>286</h1></section>
+				<section><h1>287</h1></section>
+				<section><h1>288</h1></section>
+				<section><h1>289</h1></section>
+				<section><h1>290</h1></section>
+				<section><h1>291</h1></section>
+				<section><h1>292</h1></section>
+				<section><h1>293</h1></section>
+				<section><h1>294</h1></section>
+				<section><h1>295</h1></section>
+				<section><h1>296</h1></section>
+				<section><h1>297</h1></section>
+				<section><h1>298</h1></section>
+				<section><h1>299</h1></section>
+				<section><h1>300</h1></section>
+				<section><h1>301</h1></section>
+				<section><h1>302</h1></section>
+				<section><h1>303</h1></section>
+				<section><h1>304</h1></section>
+				<section><h1>305</h1></section>
+				<section><h1>306</h1></section>
+				<section><h1>307</h1></section>
+				<section><h1>308</h1></section>
+				<section><h1>309</h1></section>
+				<section><h1>310</h1></section>
+				<section><h1>311</h1></section>
+				<section><h1>312</h1></section>
+				<section><h1>313</h1></section>
+				<section><h1>314</h1></section>
+				<section><h1>315</h1></section>
+				<section><h1>316</h1></section>
+				<section><h1>317</h1></section>
+				<section><h1>318</h1></section>
+				<section><h1>319</h1></section>
+				<section><h1>320</h1></section>
+				<section><h1>321</h1></section>
+				<section><h1>322</h1></section>
+				<section><h1>323</h1></section>
+				<section><h1>324</h1></section>
+				<section><h1>325</h1></section>
+				<section><h1>326</h1></section>
+				<section><h1>327</h1></section>
+				<section><h1>328</h1></section>
+				<section><h1>329</h1></section>
+				<section><h1>330</h1></section>
+				<section><h1>331</h1></section>
+				<section><h1>332</h1></section>
+				<section><h1>333</h1></section>
+				<section><h1>334</h1></section>
+				<section><h1>335</h1></section>
+				<section><h1>336</h1></section>
+				<section><h1>337</h1></section>
+				<section><h1>338</h1></section>
+				<section><h1>339</h1></section>
+				<section><h1>340</h1></section>
+				<section><h1>341</h1></section>
+				<section><h1>342</h1></section>
+				<section><h1>343</h1></section>
+				<section><h1>344</h1></section>
+				<section><h1>345</h1></section>
+				<section><h1>346</h1></section>
+				<section><h1>347</h1></section>
+				<section><h1>348</h1></section>
+				<section><h1>349</h1></section>
+				<section><h1>350</h1></section>
+				<section><h1>351</h1></section>
+				<section><h1>352</h1></section>
+				<section><h1>353</h1></section>
+				<section><h1>354</h1></section>
+				<section><h1>355</h1></section>
+				<section><h1>356</h1></section>
+				<section><h1>357</h1></section>
+				<section><h1>358</h1></section>
+				<section><h1>359</h1></section>
+				<section><h1>360</h1></section>
+				<section><h1>361</h1></section>
+				<section><h1>362</h1></section>
+				<section><h1>363</h1></section>
+				<section><h1>364</h1></section>
+				<section><h1>365</h1></section>
+				<section><h1>366</h1></section>
+				<section><h1>367</h1></section>
+				<section><h1>368</h1></section>
+				<section><h1>369</h1></section>
+				<section><h1>370</h1></section>
+				<section><h1>371</h1></section>
+				<section><h1>372</h1></section>
+				<section><h1>373</h1></section>
+				<section><h1>374</h1></section>
+				<section><h1>375</h1></section>
+				<section><h1>376</h1></section>
+				<section><h1>377</h1></section>
+				<section><h1>378</h1></section>
+				<section><h1>379</h1></section>
+				<section><h1>380</h1></section>
+				<section><h1>381</h1></section>
+				<section><h1>382</h1></section>
+				<section><h1>383</h1></section>
+				<section><h1>384</h1></section>
+				<section><h1>385</h1></section>
+				<section><h1>386</h1></section>
+				<section><h1>387</h1></section>
+				<section><h1>388</h1></section>
+				<section><h1>389</h1></section>
+				<section><h1>390</h1></section>
+				<section><h1>391</h1></section>
+				<section><h1>392</h1></section>
+				<section><h1>393</h1></section>
+				<section><h1>394</h1></section>
+				<section><h1>395</h1></section>
+				<section><h1>396</h1></section>
+				<section><h1>397</h1></section>
+				<section><h1>398</h1></section>
+				<section><h1>399</h1></section>
+				<section><h1>400</h1></section>
+				<section><h1>401</h1></section>
+				<section><h1>402</h1></section>
+				<section><h1>403</h1></section>
+				<section><h1>404</h1></section>
+				<section><h1>405</h1></section>
+				<section><h1>406</h1></section>
+				<section><h1>407</h1></section>
+				<section><h1>408</h1></section>
+				<section><h1>409</h1></section>
+				<section><h1>410</h1></section>
+				<section><h1>411</h1></section>
+				<section><h1>412</h1></section>
+				<section><h1>413</h1></section>
+				<section><h1>414</h1></section>
+				<section><h1>415</h1></section>
+				<section><h1>416</h1></section>
+				<section><h1>417</h1></section>
+				<section><h1>418</h1></section>
+				<section><h1>419</h1></section>
+				<section><h1>420</h1></section>
+				<section><h1>421</h1></section>
+				<section><h1>422</h1></section>
+				<section><h1>423</h1></section>
+				<section><h1>424</h1></section>
+				<section><h1>425</h1></section>
+				<section><h1>426</h1></section>
+				<section><h1>427</h1></section>
+				<section><h1>428</h1></section>
+				<section><h1>429</h1></section>
+				<section><h1>430</h1></section>
+				<section><h1>431</h1></section>
+				<section><h1>432</h1></section>
+				<section><h1>433</h1></section>
+				<section><h1>434</h1></section>
+				<section><h1>435</h1></section>
+				<section><h1>436</h1></section>
+				<section><h1>437</h1></section>
+				<section><h1>438</h1></section>
+				<section><h1>439</h1></section>
+				<section><h1>440</h1></section>
+				<section><h1>441</h1></section>
+				<section><h1>442</h1></section>
+				<section><h1>443</h1></section>
+				<section><h1>444</h1></section>
+				<section><h1>445</h1></section>
+				<section><h1>446</h1></section>
+				<section><h1>447</h1></section>
+				<section><h1>448</h1></section>
+				<section><h1>449</h1></section>
+				<section><h1>450</h1></section>
+				<section><h1>451</h1></section>
+				<section><h1>452</h1></section>
+				<section><h1>453</h1></section>
+				<section><h1>454</h1></section>
+				<section><h1>455</h1></section>
+				<section><h1>456</h1></section>
+				<section><h1>457</h1></section>
+				<section><h1>458</h1></section>
+				<section><h1>459</h1></section>
+				<section><h1>460</h1></section>
+				<section><h1>461</h1></section>
+				<section><h1>462</h1></section>
+				<section><h1>463</h1></section>
+				<section><h1>464</h1></section>
+				<section><h1>465</h1></section>
+				<section><h1>466</h1></section>
+				<section><h1>467</h1></section>
+				<section><h1>468</h1></section>
+				<section><h1>469</h1></section>
+				<section><h1>470</h1></section>
+				<section><h1>471</h1></section>
+				<section><h1>472</h1></section>
+				<section><h1>473</h1></section>
+				<section><h1>474</h1></section>
+				<section><h1>475</h1></section>
+				<section><h1>476</h1></section>
+				<section><h1>477</h1></section>
+				<section><h1>478</h1></section>
+				<section><h1>479</h1></section>
+				<section><h1>480</h1></section>
+				<section><h1>481</h1></section>
+				<section><h1>482</h1></section>
+				<section><h1>483</h1></section>
+				<section><h1>484</h1></section>
+				<section><h1>485</h1></section>
+				<section><h1>486</h1></section>
+				<section><h1>487</h1></section>
+				<section><h1>488</h1></section>
+				<section><h1>489</h1></section>
+				<section><h1>490</h1></section>
+				<section><h1>491</h1></section>
+				<section><h1>492</h1></section>
+				<section><h1>493</h1></section>
+				<section><h1>494</h1></section>
+				<section><h1>495</h1></section>
+				<section><h1>496</h1></section>
+				<section><h1>497</h1></section>
+				<section><h1>498</h1></section>
+				<section><h1>499</h1></section>
+			</div>
+		</div>
+
+		<script src="../dist/reveal.js"></script>
+		<script>
+			Reveal.initialize({
+				transition: 'linear'
+			});
+		</script>
+	</body>
+</html>

examples/markdown.html

@@ -99,6 +99,25 @@
                     </script>
                 </section>
 
+                <!-- add optional line count offset, in this case 287 -->
+                <section data-markdown>
+                    <script type="text/template">
+                        ## echo.c
+
+                        ```c [287: 2|4,6]
+                        /* All of the options in this arg are valid, so handle them. */
+                        p = arg + 1;
+                        do {
+                            if (*p == 'n')
+                                nflag = 0;
+                            if (*p == 'e')
+                                eflag = '\\';
+                        } while (*++p); 
+                        ```
+                        [source](https://git.busybox.net/busybox/tree/coreutils/echo.c?h=1_36_stable#n287)
+                    </script>
+                </section>
+
                 <!-- Images -->
                 <section data-markdown>
                     <script type="text/template">

examples/scroll.html

@@ -0,0 +1,118 @@
+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - Scroll View</title>
+
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+
+		<link rel="stylesheet" href="../dist/reset.css">
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../dist/theme/black.css" id="theme">
+    <link rel="stylesheet" href="../plugin/highlight/monokai.css">
+	</head>
+
+	<body>
+
+		<div class="reveal">
+
+			<div class="slides">
+
+				<section><h1>Scroll View</h1></section>
+				<section data-background="indigo">
+					<h2>Scroll triggered fragments</h2>
+					<ul>
+						<li class="fragment fade-left">Step one</li>
+						<li class="fragment fade-left">Step two</li>
+						<li class="fragment fade-left">Step three</li>
+					</ul>
+				</section>
+				<section data-background-color="#fff"><h2>Scrollbar inverts<br>based on slide bg</h2></section>
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<h2>Auto-Animate</h2>
+					<p>Scroll triggered auto-animations 😍</p>
+					<div class="r-hstack justify-center">
+						<div data-id="box1" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+						<div data-id="box2" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+						<div data-id="box3" style="background: #999; width: 50px; height: 50px; margin: 10px; border-radius: 5px;"></div>
+					</div>
+				</section>
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<div class="r-hstack justify-center">
+						<div data-id="box1" data-auto-animate-delay="0" style="background: cyan; width: 150px; height: 100px; margin: 10px;"></div>
+						<div data-id="box2" data-auto-animate-delay="0.1" style="background: magenta; width: 150px; height: 100px; margin: 10px;"></div>
+						<div data-id="box3" data-auto-animate-delay="0.2" style="background: yellow; width: 150px; height: 100px; margin: 10px;"></div>
+					</div>
+					<h2 style="margin-top: 20px;">Auto-Animate</h2>
+				</section>
+				<section data-auto-animate data-auto-animate-easing="cubic-bezier(0.770, 0.000, 0.175, 1.000)">
+					<div class="r-stack">
+						<div data-id="box1" style="background: cyan; width: 300px; height: 300px; border-radius: 200px;"></div>
+						<div data-id="box2" style="background: magenta; width: 200px; height: 200px; border-radius: 200px;"></div>
+						<div data-id="box3" style="background: yellow; width: 100px; height: 100px; border-radius: 200px;"></div>
+					</div>
+					<h2 style="margin-top: 20px;">Auto-Animate</h2>
+				</section>
+				<section data-background-gradient="linear-gradient(to bottom, #283b95, #17b2c3)" id="gradient-bg">
+					<h2 data-id="code-title">Code highlights,<br />meet scroll triggers</h2>
+					<pre data-id="code-animation"><code class="hljs javascript" data-trim data-line-numbers="|4,8-11|17|22-24"><script type="text/template">
+						import React, { useState } from 'react';
+
+						function Example() {
+						  const [count, setCount] = useState(0);
+
+						  return (
+						    <div>
+						      <p>You clicked {count} times</p>
+						      <button onClick={() => setCount(count + 1)}>
+						        Click me
+						      </button>
+						    </div>
+						  );
+						}
+
+						function SecondExample() {
+						  const [count, setCount] = useState(0);
+
+						  return (
+						    <div>
+						      <p>You clicked {count} times</p>
+						      <button onClick={() => setCount(count + 1)}>
+						        Click me
+						      </button>
+						    </div>
+						  );
+						}
+					</script></code></pre>
+				</section>
+				<section class="stack">
+          <section data-background="https://static.slid.es/reveal/image-placeholder.png" id="image-bg">
+            <h2>Image Backgrounds</h2>
+          </section>
+          <section data-background-video-muted data-background-video="https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.mp4,https://s3.amazonaws.com/static.slid.es/site/homepage/v1/homepage-video-editor.webm">
+            <h2>Video background</h2>
+          </section>
+        </section>
+				<section><h2>The end</h2></section>
+
+			</div>
+
+		</div>
+
+		<script src="../dist/reveal.js"></script>
+		<script src="../plugin/notes/notes.js"></script>
+		<script src="../plugin/markdown/markdown.js"></script>
+		<script src="../plugin/highlight/highlight.js"></script>
+		<script>
+      Reveal.initialize({
+        view: 'scroll',
+        hash: true,
+
+				plugins: [ RevealMarkdown, RevealHighlight, RevealNotes ]
+			});
+    </script>
+
+	</body>
+</html>

gulpfile.js

@@ -1,13 +1,11 @@
 const pkg = require('./package.json')
-const path = require('path')
 const glob = require('glob')
 const yargs = require('yargs')
-const colors = require('colors')
 const through = require('through2');
 const qunit = require('node-qunit-puppeteer')
 
 const {rollup} = require('rollup')
-const {terser} = require('rollup-plugin-terser')
+const terser = require('@rollup/plugin-terser')
 const babel = require('@rollup/plugin-babel').default
 const commonjs = require('@rollup/plugin-commonjs')
 const resolve = require('@rollup/plugin-node-resolve').default
@@ -31,7 +29,7 @@ const banner = `/*!
 * ${pkg.homepage}
 * MIT licensed
 *
-* Copyright (C) 2011-2022 Hakim El Hattab, https://hakim.se
+* Copyright (C) 2011-2023 Hakim El Hattab, https://hakim.se
 */\n`
 
 // Prevents warnings from opening too many test pages
@@ -164,11 +162,10 @@ function compileSass() {
 
     sass.render({
         data: transformedFile.contents.toString(),
-        includePaths: ['css/', 'css/theme/template']
+        file: transformedFile.path,
     }, ( err, result ) => {
         if( err ) {
-            console.log( vinylFile.path );
+            callback(err);
-            console.log( err.formatted );
         }
         else {
             transformedFile.extname = '.css';
@@ -278,7 +275,7 @@ gulp.task('package', gulp.series(() =>
             './lib/**',
             './images/**',
             './plugin/**',
-            './**.md'
+            './**/*.md'
         ],
         { base: './' }
     )
@@ -286,7 +283,7 @@ gulp.task('package', gulp.series(() =>
 
 ))
 
-gulp.task('reload', () => gulp.src(['*.html', '*.md'])
+gulp.task('reload', () => gulp.src(['index.html'])
     .pipe(connect.reload()));
 
 gulp.task('serve', () => {
@@ -298,14 +295,19 @@ gulp.task('serve', () => {
         livereload: true
     })
 
-    gulp.watch(['*.html', '*.md'], gulp.series('reload'))
+    const slidesRoot = root.endsWith('/') ? root : root + '/'
+    gulp.watch([
+        slidesRoot + '**/*.html',
+        slidesRoot + '**/*.md',
+        `!${slidesRoot}**/node_modules/**`, // ignore node_modules
+    ], gulp.series('reload'))
 
     gulp.watch(['js/**'], gulp.series('js', 'reload', 'eslint'))
 
     gulp.watch(['plugin/**/plugin.js', 'plugin/**/*.html'], gulp.series('plugins', 'reload'))
 
     gulp.watch([
-        'css/theme/source/*.{sass,scss}',
+        'css/theme/source/**/*.{sass,scss}',
         'css/theme/template/*.{sass,scss}',
     ], gulp.series('css-themes', 'reload'))
 

index.html

@@ -1,197 +1,22 @@
-<!DOCTYPE html>
+<!doctype html>
-<html>
+<html lang="en">
 	<head>
-    <meta charset="utf-8" />
+		<meta charset="utf-8">
-    <meta
+		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
-      name="viewport"
-      content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"
-    />
 
 		<title>reveal.js</title>
 
-    <link rel="stylesheet" href="dist/reset.css" />
+		<link rel="stylesheet" href="dist/reset.css">
-    <link rel="stylesheet" href="dist/reveal.css" />
+		<link rel="stylesheet" href="dist/reveal.css">
-    <link rel="stylesheet" href="dist/theme/serif.css" />
+		<link rel="stylesheet" href="dist/theme/black.css">
 
 		<!-- Theme used for syntax highlighted code -->
-    <link rel="stylesheet" href="plugin/highlight/monokai.css" />
+		<link rel="stylesheet" href="plugin/highlight/monokai.css">
 	</head>
 	<body>
 		<div class="reveal">
 			<div class="slides">
-        <section data-markdown>
+				<section data-markdown="ai_lecture.md"></section>
-          ![logo](./images/logo.png)
-
-          ### Accounting Internship Report
-
-          - Author: CHEN Yongyuan (Walter)
-          - Report date: 2022-11-09
-
-          Note:
-          My name is Walter.
-
-          First of all, I am very happy that I can share my accounting internship experience here.
-
-          During last summer holiday, I took an internship at Grant Thornton.
-        </section>
-        <section data-markdown>
-          ### Agenda
-
-          1. About the accounting internship
-          2. Details of the internship project
-          3. Key lessons learned
-          4. Suggestion
-        </section>
-        <section>
-          <section
-            data-background-image="./images/haiyoulogo.png"
-            data-background-size="contain"
-            data-background-opacity="0.139"
-            >
-            <h3>Accounting Internship Overview</h3>
-            <ul>
-              <li class="fragment">
-              🏠 Company: China National Offshore Oil Corp
-                (<b>CNOOC Guangdong Sales Co. Ltd</b>)
-              </li>
-              <aside class="notes">
-              <p>
-                The company we audited was CNOOC which this is a huge group coporation.
-                Our team is focusing on the CNOOC Guangdong sales company.
-              </p>
-              </aside>
-              <li class="fragment">👨 Supervisor: FU Kaijun</li>
-              <aside class="notes">
-                <p>
-                My supervisor, also our team leader, is FU kaijun.
-                </p>
-              </aside>
-              <li class="fragment">👕 Role: Audit assistant of Guangdong audit team</li>
-              <aside class="notes">
-                <p>
-                My role in the audit team is audit assistant.
-                I assist the team to do some of the perform substantive procedures.
-                Also, I check for errors in the subsidiary's financial reports and parent's consolidated financial statements.
-                Then I summarize my work into audit working paper.
-                </p>
-              </aside>
-              <li class="fragment">🌍 Location: Guangdong area (Zhanjiang, Zhuhai, Jiangmen, and Guangzhou)</li>
-              <aside class="notes">
-                <p>
-                There are many subsidiaries in Guangdong, and our team is mainly responsible for (these places).
-                and finally, we returned to the parent company in Guangzhou to do the work related to consolidation.
-                </p>
-              </aside>
-            </ul>
-            <p class="fragment" style="text-align: left;">
-              My job is to perform
-              <span class="fragment highlight-red">substantive procedures</span>,
-              <span class="fragment highlight-green">prepare audit working paper</span>,
-              and <span class="fragment highlight-blue">write programs</span> to reduce repetitive work.
-            </p>
-          </section>
-          <section data-background-image="./images/guquanjiegou.png" data-background-size="contain">
-            <aside class="notes">
-              This is the equity strcture.
-              Our team is focusing on the CNOOC Guangdong sales company which has more than 27 subsidiaries.
-            </aside>
-          </section>
-          <section data-background-image="./images/oil.jpg" data-background-size="contain">
-            <aside class="notes">
-              We go to each subsidiary's gas station to check fixed assets and oil inventory.
-            </aside>
-          </section>
-          <section data-background-image="./images/paper.jpg" data-background-size="contain">
-            <aside class="notes">
-              In this photo, we use sampling method to get a checklist, and then we go to the office to look for the corresponding accounting documents according to the checklist.
-            </aside>
-          </section>
-          <section data-background-image="./images/report.png" data-background-size="contain">
-            <aside class="notes">
-              And another of my job, which is probably why I got hired, is to write a computer program to automatically transfer some data from excel to word report.
-              Because during the interview they asked my lots of question about the PDF and excel processing.
-            </aside>
-          </section>
-          <section data-background-image="./images/highlight.png" data-background-size="contain"></section>
-          <section data-background-image="./images/excel.png" data-background-size="contain"></section>
-        </section>
-        <section>
-        <section data-markdown>
-            ### Key Lessons Learned
-
-            > If there is anything unsure, be sure to ask.
-
-            Notes:
-            Although I had not taken any auditing course when I start the internship, I still manage to learn some basic concept before I went to workplace.
-            During the internship, I learned a lot, not just accounting and auditing standard such as consolidated financial statement.
-            Also include work etiquette, communication methods, etc.
-
-            The first lessons I learned, also the first thing my supervisor told my in the work, is if there anything unsure, be sure to ask.
-            Let me explain.
-
-            Our audit schedule is very tight.
-            We spent most of our time in reviewing and correcting errors in financial statements.
-            After we audit the subsidiaries individual financial statement, then we will put them together and review the consolidated financial statement.
-            At the same time, we will also prepare audit papers.
-            So that means if there are errors in subsidiary's statement, but found it during the consolidated process, that means we need to go back to readjust the consolidated statement and audit worksheet.
-            This will not only slow down the entire audit project, but also add extra workload to other team members.
-          </section>
-          <section data-markdown>
-            ### Key Lessons Learned
-
-            > Don't work hard, work smart!
-
-            Notes:
-            The difference between work hard and work smart is how much time you spend in completing tasks. Hard work tends to be when someone spends a great amout of time completing many things, while smart work is when they spend more time to find the right way to complete right things.
-
-            A very typically example during my internship is. Once we use scanner to scan hundreds of documents and needed to rename those file in certain order. On of my co-worker said "Okey, just give me one hour I will rename them one by one". However the correct way to do that is simply select all files, and press F2 then you can rename all files at once.
-            
-            At that time I didn't know that F2 is the shortcut to rename files, but I am sure there must be some way to do this task quickly, so I spent two minutes seaerching on Baidu, and spend one minute to complete the task.
-
-            In general, if you find yourself doing a very repetitive task, there may be a smater way to accomplish the task. Never stop learning new knowledge.
-          </section>
-        </section>
-        <section>
-          <section data-markdown>
-            ## Suggestion
-          </section>
-          <section data-markdown>
-            ## For the Company
-
-            > Information Island: Data in system that has no external connectivity.
-
-            - Can't sync/compare data between systems
-            - Require manually input data
-            - Involve more errors
-            - Increase complexity
-
-            Invest on developing a all-in-one solution system or pipeline between system, and traning employee to use the system.
-
-            Notes:
-
-            SAP, 久其报表，海油卡
-          </section>
-          <section data-markdown>
-            ## For the Accounting Program
-
-            - Set a file naming standard
-              - Instead of something like `Water final ver.2 (1).docx`
-            - Set a version control system for the files
-            - Automate repetitive tasks
-          </section>
-          <section>
-            <h2>For Future Accounting Interns</h2>
-            <ul>
-              <li class="fragment">Get an accounting certification</li>
-              <li class="fragment">Be familiar with Chinese tax & laws</li>
-              <li class="fragment">Learn a programming language (Recommend: <code>Python</code>)</li>
-            </ul>
-          </section>
-        </section>
-        <section>
-          <h1>Thank you</h1>
-          <p>for listining</p>
-        </section>
 			</div>
 		</div>
 
@@ -199,7 +24,6 @@
 		<script src="plugin/notes/notes.js"></script>
 		<script src="plugin/markdown/markdown.js"></script>
 		<script src="plugin/highlight/highlight.js"></script>
-    <script src="plugin/zoom/zoom.js"></script>
 		<script>
 			// More info about initialization & config:
 			// - https://revealjs.com/initialization/
@@ -210,7 +34,7 @@
 				height: 1080,
 
 				// Learn about plugins: https://revealjs.com/plugins/
-        plugins: [RevealMarkdown, RevealHighlight, RevealNotes, RevealZoom],
+				plugins: [ RevealMarkdown, RevealHighlight, RevealNotes ]
 			});
 		</script>
 	</body>

js/config.js

@@ -65,6 +65,9 @@ export default {
 	// Flags if we should monitor the hash and change slides accordingly
 	respondToHashChanges: true,
 
+	// Enable support for jump-to-slide navigation shortcuts
+	jumpToSlide: true,
+
 	// Push each slide change to the browser history.  Implies `hash: true`
 	history: false,
 
@@ -253,6 +256,36 @@ export default {
 	parallaxBackgroundHorizontal: null,
 	parallaxBackgroundVertical: null,
 
+	// Can be used to initialize reveal.js in one of the following views:
+	// - print:   Render the presentation so that it can be printed to PDF
+	// - scroll:  Show the presentation as a tall scrollable page with scroll
+	//            triggered animations
+	view: null,
+
+	// Adjusts the height of each slide in the scroll view.
+	// - full:       Each slide is as tall as the viewport
+	// - compact:    Slides are as small as possible, allowing multiple slides
+	//               to be visible in parallel on tall devices
+	scrollLayout: 'full',
+
+	// Control how scroll snapping works in the scroll view.
+	// - false:   	No snapping, scrolling is continuous
+	// - proximity:  Snap when close to a slide
+	// - mandatory:  Always snap to the closest slide
+	//
+	// Only applies to presentations in scroll view.
+	scrollSnap: 'mandatory',
+
+	// Enables and configure the scroll view progress bar.
+	// - 'auto':    Show the scrollbar while scrolling, hide while idle
+	// - true:      Always show the scrollbar
+	// - false:     Never show the scrollbar
+	scrollProgress: 'auto',
+
+	// Automatically activate the scroll view when we the viewport falls
+	// below the given width.
+	scrollActivationWidth: 435,
+
 	// The maximum number of pages a single slide can expand onto when printing
 	// to PDF, unlimited by default
 	pdfMaxPagesPerSlide: Number.POSITIVE_INFINITY,
@@ -284,6 +317,10 @@ export default {
 	// Time before the cursor is hidden (in ms)
 	hideCursorTime: 5000,
 
+	// Should we automatically sort and set indices for fragments
+	// at each sync? (See Reveal.sync)
+	sortFragmentsOnSync: true,
+
 	// Script dependencies to load
 	dependencies: [],
 

js/controllers/autoanimate.js

@@ -461,7 +461,7 @@ export default class AutoAnimate {
 		const textNodes = 'h1, h2, h3, h4, h5, h6, p, li';
 		const mediaNodes = 'img, video, iframe';
 
-		// Eplicit matches via data-id
+		// Explicit matches via data-id
 		this.findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {
 			return node.nodeName + ':::' + node.getAttribute( 'data-id' );
 		} );
@@ -504,7 +504,7 @@ export default class AutoAnimate {
 				} );
 
 				// Line numbers
-				this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-line[data-line-number]', node => {
+				this.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-numbers[data-line-number]', node => {
 					return node.getAttribute( 'data-line-number' );
 				}, {
 					scale: false,
@@ -573,14 +573,14 @@ export default class AutoAnimate {
 
 			// Retrieve the 'from' element
 			if( fromMatches[key] ) {
-				const pimaryIndex = toMatches[key].length - 1;
+				const primaryIndex = toMatches[key].length - 1;
 				const secondaryIndex = fromMatches[key].length - 1;
 
 				// If there are multiple identical from elements, retrieve
 				// the one at the same index as our to-element.
-				if( fromMatches[key][ pimaryIndex ] ) {
+				if( fromMatches[key][ primaryIndex ] ) {
-					fromElement = fromMatches[key][ pimaryIndex ];
+					fromElement = fromMatches[key][ primaryIndex ];
-					fromMatches[key][ pimaryIndex ] = null;
+					fromMatches[key][ primaryIndex ] = null;
 				}
 				// If there are no matching from-elements at the same index,
 				// use the last one.
@@ -608,7 +608,7 @@ export default class AutoAnimate {
 	 * fading of unmatched elements is turned on, these elements
 	 * will fade when going between auto-animate slides.
 	 *
-	 * Note that parents of auto-animate targets are NOT considerd
+	 * Note that parents of auto-animate targets are NOT considered
 	 * unmatched since fading them would break the auto-animation.
 	 *
 	 * @param {HTMLElement} rootElement

js/controllers/backgrounds.js

@@ -190,10 +190,30 @@ export default class Backgrounds {
 		if( data.backgroundPosition ) contentElement.style.backgroundPosition = data.backgroundPosition;
 		if( data.backgroundOpacity ) contentElement.style.opacity = data.backgroundOpacity;
 
+		const contrastClass = this.getContrastClass( slide );
+
+		if( typeof contrastClass === 'string' ) {
+			slide.classList.add( contrastClass );
+		}
+
+	}
+
+	/**
+	 * Returns a class name that can be applied to a slide to indicate
+	 * if it has a light or dark background.
+	 *
+	 * @param {*} slide
+	 *
+	 * @returns {string|null}
+	 */
+	getContrastClass( slide ) {
+
+		const element = slide.slideBackgroundElement;
+
 		// If this slide has a background color, we add a class that
 		// signals if it is light or dark. If the slide has no background
 		// color, no class will be added
-		let contrastColor = data.backgroundColor;
+		let contrastColor = slide.getAttribute( 'data-background-color' );
 
 		// If no bg color was found, or it cannot be converted by colorToRgb, check the computed background
 		if( !contrastColor || !colorToRgb( contrastColor ) ) {
@@ -211,14 +231,32 @@ export default class Backgrounds {
 			// an element with no background
 			if( rgb && rgb.a !== 0 ) {
 				if( colorBrightness( contrastColor ) < 128 ) {
-					slide.classList.add( 'has-dark-background' );
+					return 'has-dark-background';
 				}
 				else {
-					slide.classList.add( 'has-light-background' );
+					return 'has-light-background';
 				}
 			}
 		}
 
+		return null;
+
+	}
+
+	/**
+	 * Bubble the 'has-light-background'/'has-dark-background' classes.
+	 */
+	bubbleSlideContrastClassToElement( slide, target ) {
+
+		[ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {
+			if( slide.classList.contains( classToBubble ) ) {
+				target.classList.add( classToBubble );
+			}
+			else {
+				target.classList.remove( classToBubble );
+			}
+		}, this );
+
 	}
 
 	/**
@@ -263,10 +301,12 @@ export default class Backgrounds {
 
 					backgroundv.classList.remove( 'past', 'present', 'future' );
 
-					if( v < indices.v ) {
+					const indexv = typeof indices.v === 'number' ? indices.v : 0;
+
+					if( v < indexv ) {
 						backgroundv.classList.add( 'past' );
 					}
-					else if ( v > indices.v ) {
+					else if ( v > indexv ) {
 						backgroundv.classList.add( 'future' );
 					}
 					else {
@@ -322,14 +362,7 @@ export default class Backgrounds {
 		// If there's a background brightness flag for this slide,
 		// bubble it to the .reveal container
 		if( currentSlide ) {
-			[ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {
+			this.bubbleSlideContrastClassToElement( currentSlide, this.Reveal.getRevealElement() );
-				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

js/controllers/fragments.js

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

js/controllers/jumptoslide.js

@@ -0,0 +1,197 @@
+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 mumber
+		// (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 );
+
+	}
+
+}

js/controllers/keyboard.js

@@ -17,7 +17,6 @@ export default class Keyboard {
 		this.bindings = {};
 
 		this.onDocumentKeyDown = this.onDocumentKeyDown.bind( this );
-		this.onDocumentKeyPress = this.onDocumentKeyPress.bind( this );
 
 	}
 
@@ -43,6 +42,7 @@ export default class Keyboard {
 		this.shortcuts['Shift + ←/&#8593/→/↓']      = 'Jump to first/last slide';
 		this.shortcuts['B  ,  .']                       = 'Pause';
 		this.shortcuts['F']                             = 'Fullscreen';
+		this.shortcuts['G']                             = 'Jump to slide';
 		this.shortcuts['ESC, O']                        = 'Slide overview';
 
 	}
@@ -53,7 +53,6 @@ export default class Keyboard {
 	bind() {
 
 		document.addEventListener( 'keydown', this.onDocumentKeyDown, false );
-		document.addEventListener( 'keypress', this.onDocumentKeyPress, false );
 
 	}
 
@@ -63,7 +62,6 @@ export default class Keyboard {
 	unbind() {
 
 		document.removeEventListener( 'keydown', this.onDocumentKeyDown, false );
-		document.removeEventListener( 'keypress', this.onDocumentKeyPress, false );
 
 	}
 
@@ -134,20 +132,6 @@ export default class Keyboard {
 
 	}
 
-	/**
-	 * Handler for the document level 'keypress' event.
-	 *
-	 * @param {object} event
-	 */
-	onDocumentKeyPress( event ) {
-
-		// Check if the pressed key is question mark
-		if( event.shiftKey && event.charCode === 63 ) {
-			this.Reveal.toggleHelp();
-		}
-
-	}
-
 	/**
 	 * Handler for the document level 'keydown' event.
 	 *
@@ -183,10 +167,10 @@ export default class Keyboard {
 		let activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);
 
 		// Whitelist certain modifiers for slide navigation shortcuts
-		let isNavigationKey = [32, 37, 38, 39, 40, 78, 80].indexOf( event.keyCode ) !== -1;
+		let keyCodeUsesModifier = [32, 37, 38, 39, 40, 78, 80, 191].indexOf( event.keyCode ) !== -1;
 
 		// Prevent all other events when a modifier is pressed
-		let unusedModifier = 	!( isNavigationKey && event.shiftKey || event.altKey ) &&
+		let unusedModifier = 	!( keyCodeUsesModifier && event.shiftKey || event.altKey ) &&
 								( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );
 
 		// Disregard the event if there's a focused element or a
@@ -350,7 +334,7 @@ export default class Keyboard {
 				}
 			}
 			// TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS "BLACK SCREEN" BUTTON
-			else if( keyCode === 58 || keyCode === 59 || keyCode === 66 || keyCode === 86 || keyCode === 190 || keyCode === 191 ) {
+			else if( [58, 59, 66, 86, 190].includes( keyCode ) || ( keyCode === 191 && !event.shiftKey ) ) {
 				this.Reveal.togglePause();
 			}
 			// F
@@ -363,6 +347,16 @@ export default class Keyboard {
 					this.Reveal.toggleAutoSlide( autoSlideWasPaused );
 				}
 			}
+			// G
+			else if( keyCode === 71 ) {
+				if( config.jumpToSlide ) {
+					this.Reveal.toggleJumpToSlide();
+				}
+			}
+			// ?
+			else if( keyCode === 191 && event.shiftKey ) {
+				this.Reveal.toggleHelp();
+			}
 			else {
 				triggered = false;
 			}

js/controllers/location.js

@@ -40,7 +40,7 @@ export default class Location {
 	 *
 	 * @returns slide indices or null
 	 */
-	getIndicesFromHash( hash=window.location.hash ) {
+	getIndicesFromHash( hash=window.location.hash, options={} ) {
 
 		// Attempt to parse the hash as either an index or name
 		let name = hash.replace( /^#\/?/, '' );
@@ -49,7 +49,7 @@ export default class Location {
 		// If the first bit is not fully numeric and there is a name we
 		// can assume that this is a named link
 		if( !/^[0-9]*$/.test( bits[0] ) && name.length ) {
-			let element;
+			let slide;
 
 			let f;
 
@@ -62,17 +62,19 @@ export default class Location {
 
 			// Ensure the named link is a valid HTML ID attribute
 			try {
-				element = document.getElementById( decodeURIComponent( name ) );
+				slide = document
+					.getElementById( decodeURIComponent( name ) )
+					.closest('.slides section');
 			}
 			catch ( error ) { }
 
-			if( element ) {
+			if( slide ) {
-				return { ...this.Reveal.getIndices( element ), f };
+				return { ...this.Reveal.getIndices( slide ), f };
 			}
 		}
 		else {
 			const config = this.Reveal.getConfig();
-			let hashIndexBase = config.hashOneBasedIndex ? 1 : 0;
+			let hashIndexBase = config.hashOneBasedIndex || options.oneBasedIndex ? 1 : 0;
 
 			// Read the index components of the hash
 			let h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,
@@ -139,7 +141,7 @@ export default class Location {
 			let hash = this.getHash();
 
 			// If we're configured to push to history OR the history
-			// API is not avaialble.
+			// API is not available.
 			if( config.history ) {
 				window.location.hash = hash;
 			}

js/controllers/notes.js

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

js/controllers/overview.js

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

js/controllers/plugins.js

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

js/controllers/pointer.js

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

js/controllers/printview.js

@@ -4,7 +4,7 @@ import { queryAll, createStyleSheet } from '../utils/util.js'
 /**
  * Setups up our presentation for printing/exporting to PDF.
  */
-export default class Print {
+export default class PrintView {
 
 	constructor( Reveal ) {
 
@@ -16,7 +16,7 @@ export default class Print {
 	 * Configures the presentation for printing to a static
 	 * PDF.
 	 */
-	async setupPDF() {
+	async activate() {
 
 		const config = this.Reveal.getConfig();
 		const slides = queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR )
@@ -42,11 +42,11 @@ export default class Print {
 		// Limit the size of certain elements to the dimensions of the slide
 		createStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );
 
-		document.documentElement.classList.add( 'print-pdf' );
+		document.documentElement.classList.add( 'reveal-print', 'print-pdf' );
 		document.body.style.width = pageWidth + 'px';
 		document.body.style.height = pageHeight + 'px';
 
-		const viewportElement = document.querySelector( '.reveal-viewport' );
+		const viewportElement = this.Reveal.getViewportElement();
 		let presentationBackground;
 		if( viewportElement ) {
 			const viewportStyles = window.getComputedStyle( viewportElement );
@@ -223,14 +223,16 @@ export default class Print {
 		// Notify subscribers that the PDF layout is good to go
 		this.Reveal.dispatchEvent({ type: 'pdf-ready' });
 
+		viewportElement.classList.remove( 'loading-scroll-mode' );
+
 	}
 
 	/**
-	 * Checks if this instance is being used to print a PDF.
+	 * Checks if the print mode is/should be activated.
 	 */
-	isPrintingPDF() {
+	isActive() {
 
-		return ( /print-pdf/gi ).test( window.location.search );
+		return this.Reveal.getConfig().view === 'print';
 
 	}
 

js/controllers/scrollview.js

@@ -0,0 +1,888 @@
+import { HORIZONTAL_SLIDES_SELECTOR } from '../utils/constants.js'
+import { queryAll } from '../utils/util.js'
+
+const HIDE_SCROLLBAR_TIMEOUT = 500;
+const MAX_PROGRESS_SPACING = 4;
+const MIN_PROGRESS_SEGMENT_HEIGHT = 6;
+const MIN_PLAYHEAD_HEIGHT = 8;
+
+/**
+ * The scroll view lets you read a reveal.js presentation
+ * as a linear scrollable page.
+ */
+export default class ScrollView {
+
+	constructor( Reveal ) {
+
+		this.Reveal = Reveal;
+
+		this.active = false;
+		this.activatedCallbacks = [];
+
+		this.onScroll = this.onScroll.bind( this );
+
+	}
+
+	/**
+	 * Activates the scroll view. This rearranges the presentation DOM
+	 * by—among other things—wrapping each slide in a page element.
+	 */
+	activate() {
+
+		if( this.active ) return;
+
+		const stateBeforeActivation = this.Reveal.getState();
+
+		this.active = true;
+
+		// Store the full presentation HTML so that we can restore it
+		// when/if the scroll view is deactivated
+		this.slideHTMLBeforeActivation = this.Reveal.getSlidesElement().innerHTML;
+
+		const horizontalSlides = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_SLIDES_SELECTOR );
+
+		this.viewportElement.classList.add( 'loading-scroll-mode', 'reveal-scroll' );
+
+		let presentationBackground;
+
+		const viewportStyles = window.getComputedStyle( this.viewportElement );
+		if( viewportStyles && viewportStyles.background ) {
+			presentationBackground = viewportStyles.background;
+		}
+
+		const pageElements = [];
+		const pageContainer = horizontalSlides[0].parentNode;
+
+		let previousSlide;
+
+		// Creates a new page element and appends the given slide/bg
+		// to it.
+		const createPageElement = ( slide, h, v ) => {
+
+			let contentContainer;
+
+			// If this slide is part of an auto-animation sequence, we
+			// group it under the same page element as the previous slide
+			if( previousSlide && this.Reveal.shouldAutoAnimateBetween( previousSlide, slide ) ) {
+				contentContainer = document.createElement( 'div' );
+				contentContainer.className = 'scroll-page-content scroll-auto-animate-page';
+				contentContainer.style.display = 'none';
+				previousSlide.closest( '.scroll-page-content' ).parentNode.appendChild( contentContainer );
+			}
+			else {
+				// Wrap the slide in a page element and hide its overflow
+				// so that no page ever flows onto another
+				const page = document.createElement( 'div' );
+				page.className = 'scroll-page';
+				pageElements.push( page );
+
+				// Copy the presentation-wide background to each page
+				if( presentationBackground ) {
+					page.style.background = presentationBackground;
+				}
+
+				const stickyContainer = document.createElement( 'div' );
+				stickyContainer.className = 'scroll-page-sticky';
+				page.appendChild( stickyContainer );
+
+				contentContainer = document.createElement( 'div' );
+				contentContainer.className = 'scroll-page-content';
+				stickyContainer.appendChild( contentContainer );
+			}
+
+			contentContainer.appendChild( slide );
+
+			slide.classList.remove( 'past', 'future' );
+			slide.setAttribute( 'data-index-h', h );
+			slide.setAttribute( 'data-index-v', v );
+
+			if( slide.slideBackgroundElement ) {
+				slide.slideBackgroundElement.remove( 'past', 'future' );
+				contentContainer.insertBefore( slide.slideBackgroundElement, slide );
+			}
+
+			previousSlide = slide;
+
+		}
+
+		// Slide and slide background layout
+		horizontalSlides.forEach( ( horizontalSlide, h ) => {
+
+			if( this.Reveal.isVerticalStack( horizontalSlide ) ) {
+				horizontalSlide.querySelectorAll( 'section' ).forEach( ( verticalSlide, v ) => {
+					createPageElement( verticalSlide, h, v );
+				});
+			}
+			else {
+				createPageElement( horizontalSlide, h, 0 );
+			}
+
+		}, this );
+
+		this.createProgressBar();
+
+		// Remove leftover stacks
+		queryAll( this.Reveal.getRevealElement(), '.stack' ).forEach( stack => stack.remove() );
+
+		// Add our newly created pages to the DOM
+		pageElements.forEach( page => pageContainer.appendChild( page ) );
+
+		// Re-run JS-based content layout after the slide is added to page DOM
+		this.Reveal.slideContent.layout( this.Reveal.getSlidesElement() );
+
+		this.Reveal.layout();
+		this.Reveal.setState( stateBeforeActivation );
+
+		this.activatedCallbacks.forEach( callback => callback() );
+		this.activatedCallbacks = [];
+
+		this.restoreScrollPosition();
+
+		this.viewportElement.classList.remove( 'loading-scroll-mode' );
+		this.viewportElement.addEventListener( 'scroll', this.onScroll, { passive: true } );
+
+	}
+
+	/**
+	 * Deactivates the scroll view and restores the standard slide-based
+	 * presentation.
+	 */
+	deactivate() {
+
+		if( !this.active ) return;
+
+		const stateBeforeDeactivation = this.Reveal.getState();
+
+		this.active = false;
+
+		this.viewportElement.removeEventListener( 'scroll', this.onScroll );
+		this.viewportElement.classList.remove( 'reveal-scroll' );
+
+		this.removeProgressBar();
+
+		this.Reveal.getSlidesElement().innerHTML = this.slideHTMLBeforeActivation;
+		this.Reveal.sync();
+		this.Reveal.setState( stateBeforeDeactivation );
+
+		this.slideHTMLBeforeActivation = null;
+
+	}
+
+	toggle( override ) {
+
+		if( typeof override === 'boolean' ) {
+			override ? this.activate() : this.deactivate();
+		}
+		else {
+			this.isActive() ? this.deactivate() : this.activate();
+		}
+
+	}
+
+	/**
+	 * Checks if the scroll view is currently active.
+	 */
+	isActive() {
+
+		return this.active;
+
+	}
+
+	/**
+	 * Renders the progress bar component.
+	 */
+	createProgressBar() {
+
+		this.progressBar = document.createElement( 'div' );
+		this.progressBar.className = 'scrollbar';
+
+		this.progressBarInner = document.createElement( 'div' );
+		this.progressBarInner.className = 'scrollbar-inner';
+		this.progressBar.appendChild( this.progressBarInner );
+
+		this.progressBarPlayhead = document.createElement( 'div' );
+		this.progressBarPlayhead.className = 'scrollbar-playhead';
+		this.progressBarInner.appendChild( this.progressBarPlayhead );
+
+		this.viewportElement.insertBefore( this.progressBar, this.viewportElement.firstChild );
+
+		const handleDocumentMouseMove	= ( event ) => {
+
+			let progress = ( event.clientY - this.progressBarInner.getBoundingClientRect().top ) / this.progressBarHeight;
+			progress = Math.max( Math.min( progress, 1 ), 0 );
+
+			this.viewportElement.scrollTop = progress * ( this.viewportElement.scrollHeight - this.viewportElement.offsetHeight );
+
+		};
+
+		const handleDocumentMouseUp = ( event ) => {
+
+			this.draggingProgressBar = false;
+			this.showProgressBar();
+
+			document.removeEventListener( 'mousemove', handleDocumentMouseMove );
+			document.removeEventListener( 'mouseup', handleDocumentMouseUp );
+
+		};
+
+		const handleMouseDown = ( event ) => {
+
+			event.preventDefault();
+
+			this.draggingProgressBar = true;
+
+			document.addEventListener( 'mousemove', handleDocumentMouseMove );
+			document.addEventListener( 'mouseup', handleDocumentMouseUp );
+
+			handleDocumentMouseMove( event );
+
+		};
+
+		this.progressBarInner.addEventListener( 'mousedown', handleMouseDown );
+
+	}
+
+	removeProgressBar() {
+
+		if( this.progressBar ) {
+			this.progressBar.remove();
+			this.progressBar = null;
+		}
+
+	}
+
+	layout() {
+
+		if( this.isActive() ) {
+			this.syncPages();
+			this.syncScrollPosition();
+		}
+
+	}
+
+	/**
+	 * Updates our pages to match the latest configuration and
+	 * presentation size.
+	 */
+	syncPages() {
+
+		const config = this.Reveal.getConfig();
+
+		const slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );
+		const scale = this.Reveal.getScale();
+		const useCompactLayout = config.scrollLayout === 'compact';
+
+		const viewportHeight = this.viewportElement.offsetHeight;
+		const compactHeight = slideSize.height * scale;
+		const pageHeight = useCompactLayout ? compactHeight : viewportHeight;
+
+		// The height that needs to be scrolled between scroll triggers
+		const scrollTriggerHeight = useCompactLayout ? compactHeight : viewportHeight;
+
+		this.viewportElement.style.setProperty( '--page-height', pageHeight + 'px' );
+		this.viewportElement.style.scrollSnapType = typeof config.scrollSnap === 'string' ? `y ${config.scrollSnap}` : '';
+
+		// This will hold all scroll triggers used to show/hide slides
+		this.slideTriggers = [];
+
+		const pageElements = Array.from( this.Reveal.getRevealElement().querySelectorAll( '.scroll-page' ) );
+
+		this.pages = pageElements.map( pageElement => {
+			const page = this.createPage({
+				pageElement,
+				slideElement: pageElement.querySelector( 'section' ),
+				stickyElement: pageElement.querySelector( '.scroll-page-sticky' ),
+				contentElement: pageElement.querySelector( '.scroll-page-content' ),
+				backgroundElement: pageElement.querySelector( '.slide-background' ),
+				autoAnimateElements: pageElement.querySelectorAll( '.scroll-auto-animate-page' ),
+				autoAnimatePages: []
+			});
+
+			page.pageElement.style.setProperty( '--slide-height', config.center === true ? 'auto' : slideSize.height + 'px' );
+
+			this.slideTriggers.push({
+				page: page,
+				activate: () => this.activatePage( page ),
+				deactivate: () => this.deactivatePage( page )
+			});
+
+			// Create scroll triggers that show/hide fragments
+			this.createFragmentTriggersForPage( page );
+
+			// Create scroll triggers for triggering auto-animate steps
+			if( page.autoAnimateElements.length > 0 ) {
+				this.createAutoAnimateTriggersForPage( page );
+			}
+
+			let totalScrollTriggerCount = Math.max( page.scrollTriggers.length - 1, 0 );
+
+			// Each auto-animate step may include its own scroll triggers
+			// for fragments, ensure we count those as well
+			totalScrollTriggerCount += page.autoAnimatePages.reduce( ( total, page ) => {
+				return total + Math.max( page.scrollTriggers.length - 1, 0 );
+			}, page.autoAnimatePages.length );
+
+			// Clean up from previous renders
+			page.pageElement.querySelectorAll( '.scroll-snap-point' ).forEach( el => el.remove() );
+
+			// Create snap points for all scroll triggers
+			// - Can't be absolute in FF
+			// - Can't be 0-height in Safari
+			// - Can't use snap-align on parent in Safari because then
+			//   inner triggers won't work
+			for( let i = 0; i < totalScrollTriggerCount + 1; i++ ) {
+				const triggerStick = document.createElement( 'div' );
+				triggerStick.className = 'scroll-snap-point';
+				triggerStick.style.height = scrollTriggerHeight + 'px';
+				triggerStick.style.scrollSnapAlign = useCompactLayout ? 'center' : 'start';
+				page.pageElement.appendChild( triggerStick );
+
+				if( i === 0 ) {
+					triggerStick.style.marginTop = -scrollTriggerHeight + 'px';
+				}
+			}
+
+			// In the compact layout, only slides with scroll triggers cover the
+			// full viewport height. This helps avoid empty gaps before or after
+			// a sticky slide.
+			if( useCompactLayout && page.scrollTriggers.length > 0 ) {
+				page.pageHeight = viewportHeight;
+				page.pageElement.style.setProperty( '--page-height', viewportHeight + 'px' );
+			}
+			else {
+				page.pageHeight = pageHeight;
+				page.pageElement.style.removeProperty( '--page-height' );
+			}
+
+			// Add scroll padding based on how many scroll triggers we have
+			page.scrollPadding = scrollTriggerHeight * totalScrollTriggerCount;
+
+			// The total height including scrollable space
+			page.totalHeight = page.pageHeight + page.scrollPadding;
+
+			// This is used to pad the height of our page in CSS
+			page.pageElement.style.setProperty( '--page-scroll-padding', page.scrollPadding + 'px' );
+
+			// If this is a sticky page, stick it to the vertical center
+			if( totalScrollTriggerCount > 0 ) {
+				page.stickyElement.style.position = 'sticky';
+				page.stickyElement.style.top = Math.max( ( viewportHeight - page.pageHeight ) / 2, 0 ) + 'px';
+			}
+			else {
+				page.stickyElement.style.position = 'relative';
+				page.pageElement.style.scrollSnapAlign = page.pageHeight < viewportHeight ? 'center' : 'start';
+			}
+
+			return page;
+		} );
+
+		this.setTriggerRanges();
+
+		/*
+		console.log(this.slideTriggers.map( t => {
+			return {
+				range: `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`,
+				triggers: t.page.scrollTriggers.map( t => {
+					return `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`
+				}).join( ', ' ),
+			}
+		}))
+		*/
+
+		this.viewportElement.setAttribute( 'data-scrollbar', config.scrollProgress );
+
+		if( config.scrollProgress && this.totalScrollTriggerCount > 1 ) {
+			// Create the progress bar if it doesn't already exist
+			if( !this.progressBar ) this.createProgressBar();
+
+			this.syncProgressBar();
+		}
+		else {
+			this.removeProgressBar();
+		}
+
+	}
+
+	/**
+	 * Calculates and sets the scroll range for all of our scroll
+	 * triggers.
+	 */
+	setTriggerRanges() {
+
+		// Calculate the total number of scroll triggers
+		this.totalScrollTriggerCount = this.slideTriggers.reduce( ( total, trigger ) => {
+			return total + Math.max( trigger.page.scrollTriggers.length, 1 );
+		}, 0 );
+
+		let rangeStart = 0;
+
+		// Calculate the scroll range of each scroll trigger on a scale
+		// of 0-1
+		this.slideTriggers.forEach( ( trigger, i ) => {
+			trigger.range = [
+				rangeStart,
+				rangeStart + Math.max( trigger.page.scrollTriggers.length, 1 ) / this.totalScrollTriggerCount
+			];
+
+			const scrollTriggerSegmentSize = ( trigger.range[1] - trigger.range[0] ) / trigger.page.scrollTriggers.length;
+			// Set the range for each inner scroll trigger
+			trigger.page.scrollTriggers.forEach( ( scrollTrigger, i ) => {
+				scrollTrigger.range = [
+					rangeStart + i * scrollTriggerSegmentSize,
+					rangeStart + ( i + 1 ) * scrollTriggerSegmentSize
+				];
+			} );
+
+			rangeStart = trigger.range[1];
+		} );
+
+	}
+
+	/**
+	 * Creates one scroll trigger for each fragments in the given page.
+	 *
+	 * @param {*} page
+	 */
+	createFragmentTriggersForPage( page, slideElement ) {
+
+		slideElement = slideElement || page.slideElement;
+
+		// Each fragment 'group' is an array containing one or more
+		// fragments. Multiple fragments that appear at the same time
+		// are part of the same group.
+		const fragmentGroups = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment' ), true );
+
+		// Create scroll triggers that show/hide fragments
+		if( fragmentGroups.length ) {
+			page.fragments = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment:not(.disabled)' ) );
+			page.scrollTriggers.push(
+				// Trigger for the initial state with no fragments visible
+				{
+					activate: () => {
+						this.Reveal.fragments.update( -1, page.fragments, slideElement );
+					}
+				}
+			);
+
+			// Triggers for each fragment group
+			fragmentGroups.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 );
+
+		}
+
+	}
+
+	/**
+	 * 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();
+
+	}
+
+}

js/controllers/slidecontent.js

@@ -1,4 +1,4 @@
-import { extend, queryAll, closest, getMimeTypeFromFile } from '../utils/util.js'
+import { extend, queryAll, closest, getMimeTypeFromFile, encodeRFC3986URI } from '../utils/util.js'
 import { isMobile } from '../utils/device.js'
 
 import fitty from 'fitty';
@@ -25,6 +25,10 @@ export default class SlideContent {
 	 */
 	shouldPreload( element ) {
 
+		if( this.Reveal.isScrollView() ) {
+			return true;
+		}
+
 		// Prefer an explicit global preload setting
 		let preload = this.Reveal.getConfig().preloadIframes;
 
@@ -108,7 +112,9 @@ export default class SlideContent {
 					// URL(s)
 					else {
 						backgroundContent.style.backgroundImage = backgroundImage.split( ',' ).map( background => {
-							return `url(${encodeURI(background.trim())})`;
+							// Decode URL(s) that are already encoded first
+							let decoded = decodeURI(background.trim());
+							return `url(${encodeRFC3986URI(decoded)})`;
 						}).join( ',' );
 					}
 				}
@@ -136,13 +142,15 @@ 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 ) {
-							video.innerHTML += `<source src="${source}" type="${type}">`;
+							sourceElement.setAttribute( 'type', type );
-						}
-						else {
-							video.innerHTML += `<source src="${source}">`;
 						}
+
+						video.appendChild( sourceElement );
 					} );
 
 					backgroundContent.appendChild( video );

js/controllers/slidenumber.js

@@ -1,3 +1,10 @@
+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.
  */
@@ -23,7 +30,7 @@ export default class SlideNumber {
 	configure( config, oldConfig ) {
 
 		let slideNumberDisplay = 'none';
-		if( config.slideNumber && !this.Reveal.isPrintingPDF() ) {
+		if( config.slideNumber && !this.Reveal.isPrintView() ) {
 			if( config.showSlideNumber === 'all' ) {
 				slideNumberDisplay = 'block';
 			}
@@ -56,7 +63,7 @@ export default class SlideNumber {
 
 		let config = this.Reveal.getConfig();
 		let value;
-		let format = 'h.v';
+		let format = SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL;
 
 		if ( typeof config.slideNumber === 'function' ) {
 			value = config.slideNumber( slide );
@@ -69,7 +76,7 @@ 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 = 'c';
+				format = SLIDE_NUMBER_FORMAT_CURRENT;
 			}
 
 			// Offset the current slide number by 1 to make it 1-indexed
@@ -77,16 +84,16 @@ export default class SlideNumber {
 
 			value = [];
 			switch( format ) {
-				case 'c':
+				case SLIDE_NUMBER_FORMAT_CURRENT:
 					value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset );
 					break;
-				case 'c/t':
+				case SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL:
 					value.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset, '/', this.Reveal.getTotalSlides() );
 					break;
 				default:
 					let indices = this.Reveal.getIndices( slide );
 					value.push( indices.h + horizontalOffset );
-					let sep = format === 'h/v' ? '/' : '.';
+					let sep = format === SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL ? '/' : '.';
 					if( this.Reveal.isVerticalSlide( slide ) ) value.push( sep, indices.v + 1 );
 			}
 		}

js/reveal.js

@@ -1,7 +1,10 @@
 import SlideContent from './controllers/slidecontent.js'
 import SlideNumber from './controllers/slidenumber.js'
+import JumpToSlide from './controllers/jumptoslide.js'
 import Backgrounds from './controllers/backgrounds.js'
 import AutoAnimate from './controllers/autoanimate.js'
+import ScrollView from './controllers/scrollview.js'
+import PrintView from './controllers/printview.js'
 import Fragments from './controllers/fragments.js'
 import Overview from './controllers/overview.js'
 import Keyboard from './controllers/keyboard.js'
@@ -10,7 +13,6 @@ import Controls from './controllers/controls.js'
 import Progress from './controllers/progress.js'
 import Pointer from './controllers/pointer.js'
 import Plugins from './controllers/plugins.js'
-import Print from './controllers/print.js'
 import Touch from './controllers/touch.js'
 import Focus from './controllers/focus.js'
 import Notes from './controllers/notes.js'
@@ -26,7 +28,7 @@ import {
 } from './utils/constants.js'
 
 // The reveal.js version
-export const VERSION = '4.4.0';
+export const VERSION = '5.0.1';
 
 /**
  * reveal.js
@@ -101,8 +103,11 @@ export default function( revealElement, options ) {
 		// may be multiple presentations running in parallel.
 		slideContent = new SlideContent( Reveal ),
 		slideNumber = new SlideNumber( Reveal ),
+		jumpToSlide = new JumpToSlide( Reveal ),
 		autoAnimate = new AutoAnimate( Reveal ),
 		backgrounds = new Backgrounds( Reveal ),
+		scrollView = new ScrollView( Reveal ),
+		printView = new PrintView( Reveal ),
 		fragments = new Fragments( Reveal ),
 		overview = new Overview( Reveal ),
 		keyboard = new Keyboard( Reveal ),
@@ -111,7 +116,6 @@ export default function( revealElement, options ) {
 		progress = new Progress( Reveal ),
 		pointer = new Pointer( Reveal ),
 		plugins = new Plugins( Reveal ),
-		print = new Print( Reveal ),
 		focus = new Focus( Reveal ),
 		touch = new Touch( Reveal ),
 		notes = new Notes( Reveal );
@@ -138,6 +142,11 @@ export default function( revealElement, options ) {
 		// 5. Query params
 		config = { ...defaultConfig, ...config, ...options, ...initOptions, ...Util.getQueryHash() };
 
+		// Legacy support for the ?print-pdf query
+		if( /print-pdf/gi.test( window.location.search ) ) {
+			config.view = 'print';
+		}
+
 		setViewport();
 
 		// Force a layout when the whole page, incl fonts, has loaded
@@ -199,12 +208,15 @@ export default function( revealElement, options ) {
 		// Updates the presentation to match the current configuration values
 		configure();
 
-		// Read the initial hash
-		location.readURL();
-
 		// Create slide backgrounds
 		backgrounds.update( true );
 
+		// Activate the print/scroll view if configured
+		activateInitialView();
+
+		// Read the initial hash
+		location.readURL();
+
 		// Notify listeners that the presentation is ready but use a 1ms
 		// timeout to ensure it's not fired synchronously after #initialize()
 		setTimeout( () => {
@@ -223,19 +235,41 @@ export default function( revealElement, options ) {
 			});
 		}, 1 );
 
-		// Special setup and config is required when printing to PDF
+	}
-		if( print.isPrintingPDF() ) {
-			removeEventListeners();
 
+	/**
+	 * Activates the correct reveal.js view based on our config.
+	 * This is only invoked once during initialization.
+	 */
+	function activateInitialView() {
+
+		const activatePrintView = config.view === 'print';
+		const activateScrollView = config.view === 'scroll' || config.view === 'reader';
+
+		if( activatePrintView || activateScrollView ) {
+
+			if( activatePrintView ) {
+				removeEventListeners();
+			}
+			else {
+				touch.unbind();
+			}
+
+			// Avoid content flickering during layout
+			dom.viewport.classList.add( 'loading-scroll-mode' );
+
+			if( activatePrintView ) {
 				// The document needs to have loaded for the PDF layout
 				// measurements to be accurate
 				if( document.readyState === 'complete' ) {
-				print.setupPDF();
+					printView.activate();
 				}
 				else {
-				window.addEventListener( 'load', () => {
+					window.addEventListener( 'load', () => printView.activate() );
-					print.setupPDF();
+				}
-				} );
+			}
+			else {
+				scrollView.activate();
 			}
 		}
 
@@ -253,7 +287,18 @@ export default function( revealElement, options ) {
 
 		if( !config.showHiddenSlides ) {
 			Util.queryAll( dom.wrapper, 'section[data-visibility="hidden"]' ).forEach( slide => {
-				slide.parentNode.removeChild( slide );
+				const parent = slide.parentNode;
+
+				// If this slide is part of a stack and that stack will be
+				// empty after removing the hidden slide, remove the entire
+				// stack
+				if( parent.childElementCount === 1 && /section/i.test( parent.nodeName ) ) {
+					parent.remove();
+				}
+				else {
+					slide.remove();
+				}
+
 			} );
 		}
 
@@ -278,6 +323,7 @@ export default function( revealElement, options ) {
 
 		backgrounds.render();
 		slideNumber.render();
+		jumpToSlide.render();
 		controls.render();
 		progress.render();
 		notes.render();
@@ -371,7 +417,7 @@ export default function( revealElement, options ) {
 	function setupScrollPrevention() {
 
 		setInterval( () => {
-			if( dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {
+			if( !scrollView.isActive() && dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {
 				dom.wrapper.scrollTop = 0;
 				dom.wrapper.scrollLeft = 0;
 			}
@@ -438,8 +484,8 @@ export default function( revealElement, options ) {
 		dom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition );
 
 		// Expose our configured slide dimensions as custom props
-		dom.viewport.style.setProperty( '--slide-width', config.width + 'px' );
+		dom.viewport.style.setProperty( '--slide-width', typeof config.width === 'string' ? config.width :  config.width + 'px' );
-		dom.viewport.style.setProperty( '--slide-height', config.height + 'px' );
+		dom.viewport.style.setProperty( '--slide-height', typeof config.height === 'string' ? config.height :  config.height + 'px' );
 
 		if( config.shuffle ) {
 			shuffle();
@@ -571,6 +617,7 @@ export default function( revealElement, options ) {
 		progress.destroy();
 		backgrounds.destroy();
 		slideNumber.destroy();
+		jumpToSlide.destroy();
 
 		// Remove event listeners
 		document.removeEventListener( 'fullscreenchange', onFullscreenChange );
@@ -674,6 +721,26 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Dispatches a slidechanged event.
+	 *
+	 * @param {string} origin Used to identify multiplex clients
+	 */
+	function dispatchSlideChanged( origin ) {
+
+		dispatchEvent({
+			type: 'slidechanged',
+			data: {
+				indexh,
+				indexv,
+				previousSlide,
+				currentSlide,
+				origin
+			}
+		});
+
+	}
+
 	/**
 	 * Dispatched a postMessage of the given type from our window.
 	 */
@@ -857,7 +924,10 @@ export default function( revealElement, options ) {
 	 */
 	function layout() {
 
-		if( dom.wrapper && !print.isPrintingPDF() ) {
+		if( dom.wrapper && !printView.isActive() ) {
+
+			const viewportWidth = dom.viewport.offsetWidth;
+			const viewportHeight = dom.viewport.offsetHeight;
 
 			if( !config.disableLayout ) {
 
@@ -871,7 +941,9 @@ export default function( revealElement, options ) {
 					document.documentElement.style.setProperty( '--vh', ( window.innerHeight * 0.01 ) + 'px' );
 				}
 
-				const size = getComputedSlideSize();
+				const size = scrollView.isActive() ?
+							 getComputedSlideSize( viewportWidth, viewportHeight ) :
+							 getComputedSlideSize();
 
 				const oldScale = scale;
 
@@ -888,8 +960,9 @@ export default function( revealElement, options ) {
 				scale = Math.max( scale, config.minScale );
 				scale = Math.min( scale, config.maxScale );
 
-				// Don't apply any scaling styles if scale is 1
+				// Don't apply any scaling styles if scale is 1 or we're
-				if( scale === 1 ) {
+				// in the scroll view
+				if( scale === 1 || scrollView.isActive() ) {
 					dom.slides.style.zoom = '';
 					dom.slides.style.left = '';
 					dom.slides.style.top = '';
@@ -917,7 +990,7 @@ export default function( revealElement, options ) {
 						continue;
 					}
 
-					if( config.center || slide.classList.contains( 'center' ) ) {
+					if( ( config.center || slide.classList.contains( 'center' ) ) ) {
 						// Vertical stacks are not centred since their section
 						// children will be
 						if( slide.classList.contains( 'stack' ) ) {
@@ -945,7 +1018,13 @@ export default function( revealElement, options ) {
 				}
 			}
 
+			checkResponsiveScrollView();
+
 			dom.viewport.style.setProperty( '--slide-scale', scale );
+			dom.viewport.style.setProperty( '--viewport-width', viewportWidth + 'px' );
+			dom.viewport.style.setProperty( '--viewport-height', viewportHeight + 'px' );
+
+			scrollView.layout();
 
 			progress.update();
 			backgrounds.updateParallax();
@@ -966,7 +1045,6 @@ export default function( revealElement, options ) {
 	 * @param {string|number} height
 	 */
 	function layoutSlideContents( width, height ) {
-
 		// Handle sizing of elements with the 'r-stretch' class
 		Util.queryAll( dom.slides, 'section > .stretch, section > .r-stretch' ).forEach( element => {
 
@@ -993,6 +1071,40 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Responsively activates the scroll mode when we reach the configured
+	 * activation width.
+	 */
+	function checkResponsiveScrollView() {
+
+		// Only proceed if...
+		// 1. The DOM is ready
+		// 2. Layouts aren't disabled via config
+		// 3. We're not currently printing
+		// 4. There is a scrollActivationWidth set
+		// 5. The deck isn't configured to always use the scroll view
+		if(
+			dom.wrapper &&
+			!config.disableLayout &&
+			!printView.isActive() &&
+			typeof config.scrollActivationWidth === 'number' &&
+			config.view !== 'scroll'
+		) {
+			const size = getComputedSlideSize();
+
+			if( size.presentationWidth > 0 && size.presentationWidth <= config.scrollActivationWidth ) {
+				if( !scrollView.isActive() ) {
+					backgrounds.create();
+					scrollView.activate()
+				};
+			}
+			else {
+				if( scrollView.isActive() ) scrollView.deactivate();
+			}
+		}
+
+	}
+
 	/**
 	 * Calculates the computed pixel size of our slides. These
 	 * values are based on the width and height configuration
@@ -1003,10 +1115,18 @@ export default function( revealElement, options ) {
 	 */
 	function getComputedSlideSize( presentationWidth, presentationHeight ) {
 
+		let width = config.width;
+		let height = config.height;
+
+		if( config.disableLayout ) {
+			width = dom.slides.offsetWidth;
+			height = dom.slides.offsetHeight;
+		}
+
 		const size = {
 			// Slide size
-			width: config.width,
+			width: width,
-			height: config.height,
+			height: height,
 
 			// Presentation size
 			presentationWidth: presentationWidth || dom.wrapper.offsetWidth,
@@ -1081,6 +1201,19 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Checks if the current or specified slide is a stack containing
+	 * vertical slides.
+	 *
+	 * @param {HTMLElement} [slide=currentSlide]
+	 * @return {Boolean}
+	 */
+	function isVerticalStack( slide = currentSlide ) {
+
+		return slide.classList.contains( '.stack' ) || slide.querySelector( 'section' ) !== null;
+
+	}
+
 	/**
 	 * Returns true if we're on the last slide in the current
 	 * vertical stack.
@@ -1190,6 +1323,20 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Toggles visibility of the jump-to-slide UI.
+	 */
+	function toggleJumpToSlide( override ) {
+
+		if( typeof override === 'boolean' ) {
+			override ? jumpToSlide.show() : jumpToSlide.hide();
+		}
+		else {
+			jumpToSlide.isVisible() ? jumpToSlide.hide() : jumpToSlide.show();
+		}
+
+	}
+
 	/**
 	 * Toggles the auto slide mode on and off.
 	 *
@@ -1233,7 +1380,7 @@ export default function( revealElement, options ) {
 	 */
 	function slide( h, v, f, origin ) {
 
-		// Dispatch an event before hte slide
+		// Dispatch an event before the slide
 		const slidechange = dispatchEvent({
 			type: 'beforeslidechange',
 			data: {
@@ -1252,6 +1399,14 @@ export default function( revealElement, options ) {
 		// Query all horizontal slides in the deck
 		const horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
 
+		// If we're in scroll mode, we scroll the target slide into view
+		// instead of running our standard slide transition
+		if( scrollView.isActive() ) {
+			const scrollToSlide = scrollView.getSlideByIndices( h, v );
+			if( scrollToSlide ) scrollView.scrollToSlide( scrollToSlide );
+			return;
+		}
+
 		// Abort if there are no slides
 		if( horizontalSlides.length === 0 ) return;
 
@@ -1298,6 +1453,9 @@ export default function( revealElement, options ) {
 
 		// Detect if we're moving between two auto-animated slides
 		if( slideChanged && previousSlide && currentSlide && !overview.isActive() ) {
+			transition = 'running';
+
+			autoAnimateTransition = shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexvBefore );
 
 			// If this is an auto-animated transition, we disable the
 			// regular slide transition
@@ -1305,16 +1463,9 @@ export default function( revealElement, options ) {
 			// Note 20-03-2020:
 			// This needs to happen before we update slide visibility,
 			// otherwise transitions will still run in Safari.
-			if( previousSlide.hasAttribute( 'data-auto-animate' ) && currentSlide.hasAttribute( 'data-auto-animate' )
+			if( autoAnimateTransition ) {
-					&& previousSlide.getAttribute( 'data-auto-animate-id' ) === currentSlide.getAttribute( 'data-auto-animate-id' )
+				dom.slides.classList.add( 'disable-slide-transitions' )
-					&& !( ( indexh > indexhBefore || indexv > indexvBefore ) ? currentSlide : previousSlide ).hasAttribute( 'data-auto-animate-restart' ) ) {
-
-				autoAnimateTransition = true;
-				dom.slides.classList.add( 'disable-slide-transitions' );
 			}
-
-			transition = 'running';
-
 		}
 
 		// Update the visibility of slides now that the indices have changed
@@ -1373,16 +1524,7 @@ export default function( revealElement, options ) {
 		}
 
 		if( slideChanged ) {
-			dispatchEvent({
+			dispatchSlideChanged( origin );
-				type: 'slidechanged',
-				data: {
-					indexh,
-					indexv,
-					previousSlide,
-					currentSlide,
-					origin
-				}
-			});
 		}
 
 		// Handle embedded content
@@ -1427,6 +1569,71 @@ export default function( revealElement, options ) {
 
 	}
 
+	/**
+	 * Checks whether or not an auto-animation should take place between
+	 * the two given slides.
+	 *
+	 * @param {HTMLElement} fromSlide
+	 * @param {HTMLElement} toSlide
+	 * @param {number} indexhBefore
+	 * @param {number} indexvBefore
+	 *
+	 * @returns {boolean}
+	 */
+	function shouldAutoAnimateBetween( fromSlide, toSlide, indexhBefore, indexvBefore ) {
+
+		return 	fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' ) &&
+				fromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) &&
+				!( ( indexh > indexhBefore || indexv > indexvBefore ) ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' );
+
+	}
+
+	/**
+	 * Called anytime a new slide should be activated while in the scroll
+	 * view. The active slide is the page that occupies the most space in
+	 * the scrollable viewport.
+	 *
+	 * @param {number} pageIndex
+	 * @param {HTMLElement} slideElement
+	 */
+	function setCurrentScrollPage( slideElement, h, v ) {
+
+		let indexhBefore = indexh || 0;
+
+		indexh = h;
+		indexv = v;
+
+		const slideChanged = currentSlide !== slideElement;
+
+		previousSlide = currentSlide;
+		currentSlide = slideElement;
+
+		if( currentSlide && previousSlide ) {
+			if( config.autoAnimate && shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexv ) ) {
+				// Run the auto-animation between our slides
+				autoAnimate.run( previousSlide, currentSlide );
+			}
+		}
+
+		// Start or stop embedded content like videos and iframes
+		if( slideChanged ) {
+			if( previousSlide ) {
+				slideContent.stopEmbeddedContent( previousSlide );
+				slideContent.stopEmbeddedContent( previousSlide.slideBackgroundElement );
+			}
+
+			slideContent.startEmbeddedContent( currentSlide );
+			slideContent.startEmbeddedContent( currentSlide.slideBackgroundElement );
+		}
+
+		requestAnimationFrame( () => {
+			announceStatus( getStatusText( currentSlide ) );
+		});
+
+		dispatchSlideChanged();
+
+	}
+
 	/**
 	 * Syncs the presentation with the current DOM. Useful
 	 * when new slides or control elements are added or when
@@ -1453,7 +1660,9 @@ export default function( revealElement, options ) {
 		// Write the current hash to the URL
 		location.writeURL();
 
+		if( config.sortFragmentsOnSync === true ) {
 			fragments.sortAll();
+		}
 
 		controls.update();
 		progress.update();
@@ -1570,7 +1779,7 @@ export default function( revealElement, options ) {
 		let slides = Util.queryAll( dom.wrapper, selector ),
 			slidesLength = slides.length;
 
-		let printMode = print.isPrintingPDF();
+		let printMode = scrollView.isActive() || printView.isActive();
 		let loopedForwards = false;
 		let loopedBackwards = false;
 
@@ -1682,7 +1891,7 @@ export default function( revealElement, options ) {
 	}
 
 	/**
-	 * Shows all fragment elements within the given contaienr.
+	 * Shows all fragment elements within the given container.
 	 */
 	function showFragmentsIn( container ) {
 
@@ -1694,7 +1903,7 @@ export default function( revealElement, options ) {
 	}
 
 	/**
-	 * Hides all fragment elements within the given contaienr.
+	 * Hides all fragment elements within the given container.
 	 */
 	function hideFragmentsIn( container ) {
 
@@ -1730,7 +1939,7 @@ export default function( revealElement, options ) {
 			}
 
 			// All slides need to be visible when exporting to PDF
-			if( print.isPrintingPDF() ) {
+			if( printView.isActive() ) {
 				viewDistance = Number.MAX_VALUE;
 			}
 
@@ -1834,7 +2043,7 @@ export default function( revealElement, options ) {
 		}
 
 		// If includeFragments is set, a route will be considered
-		// availalbe if either a slid OR fragment is available in
+		// available if either a slid OR fragment is available in
 		// the given direction
 		if( includeFragments === true ) {
 			let fragmentRoutes = fragments.availableRoutes();
@@ -1961,6 +2170,15 @@ export default function( revealElement, options ) {
 
 		// If a slide is specified, return the indices of that slide
 		if( slide ) {
+			// In scroll mode the original h/x index is stored on the slide
+			if( scrollView.isActive() ) {
+				h = parseInt( slide.getAttribute( 'data-index-h' ), 10 );
+
+				if( slide.getAttribute( 'data-index-v' ) ) {
+					v = parseInt( slide.getAttribute( 'data-index-v' ), 10 );
+				}
+			}
+			else {
 				let isVertical = isVerticalSlide( slide );
 				let slideh = isVertical ? slide.parentNode : slide;
 
@@ -1978,6 +2196,7 @@ export default function( revealElement, options ) {
 					v = Math.max( Util.queryAll( slide.parentNode, 'section' ).indexOf( slide ), 0 );
 				}
 			}
+		}
 
 		if( !slide && currentSlide ) {
 			let hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0;
@@ -2176,11 +2395,7 @@ export default function( revealElement, options ) {
 
 		if( currentSlide && config.autoSlide !== false ) {
 
-			let fragment = currentSlide.querySelector( '.current-fragment' );
+			let fragment = currentSlide.querySelector( '.current-fragment[data-autoslide]' );
-
-			// When the slide first appears there is no "current" fragment so
-			// we look for a data-autoslide timing on the first fragment
-			if( !fragment ) fragment = currentSlide.querySelector( '.fragment' );
 
 			let fragmentAutoSlide = fragment ? fragment.getAttribute( 'data-autoslide' ) : null;
 			let parentAutoSlide = currentSlide.parentNode ? currentSlide.parentNode.getAttribute( 'data-autoslide' ) : null;
@@ -2509,7 +2724,6 @@ export default function( revealElement, options ) {
 	function onWindowResize( event ) {
 
 		layout();
-
 	}
 
 	/**
@@ -2652,17 +2866,24 @@ export default function( revealElement, options ) {
 		// Toggles the overview mode on/off
 		toggleOverview: overview.toggle.bind( overview ),
 
+		// Toggles the scroll view on/off
+		toggleScrollView: scrollView.toggle.bind( scrollView ),
+
 		// Toggles the "black screen" mode on/off
 		togglePause,
 
 		// Toggles the auto slide mode on/off
 		toggleAutoSlide,
 
+		// Toggles visibility of the jump-to-slide UI
+		toggleJumpToSlide,
+
 		// Slide navigation checks
 		isFirstSlide,
 		isLastSlide,
 		isLastVerticalSlide,
 		isVerticalSlide,
+		isVerticalStack,
 
 		// State checks
 		isPaused,
@@ -2670,7 +2891,9 @@ export default function( revealElement, options ) {
 		isSpeakerNotes: notes.isSpeakerNotesWindow.bind( notes ),
 		isOverview: overview.isActive.bind( overview ),
 		isFocused: focus.isFocused.bind( focus ),
-		isPrintingPDF: print.isPrintingPDF.bind( print ),
+
+		isScrollView: scrollView.isActive.bind( scrollView ),
+		isPrintView: printView.isActive.bind( printView ),
 
 		// Checks if reveal.js has been loaded and is ready for use
 		isReady: () => ready,
@@ -2679,6 +2902,10 @@ export default function( revealElement, options ) {
 		loadSlide: slideContent.load.bind( slideContent ),
 		unloadSlide: slideContent.unload.bind( slideContent ),
 
+		// Media playback
+		startEmbeddedContent: () => slideContent.startEmbeddedContent( currentSlide ),
+		stopEmbeddedContent: () => slideContent.stopEmbeddedContent( currentSlide, { unloadIframes: false } ),
+
 		// Preview management
 		showPreview,
 		hidePreview: closeOverlay,
@@ -2739,6 +2966,8 @@ export default function( revealElement, options ) {
 		hasNavigatedHorizontally: () => navigationHistory.hasNavigatedHorizontally,
 		hasNavigatedVertically: () => navigationHistory.hasNavigatedVertically,
 
+		shouldAutoAnimateBetween,
+
 		// Adds/removes a custom key binding
 		addKeyBinding: keyboard.addKeyBinding.bind( keyboard ),
 		removeKeyBinding: keyboard.removeKeyBinding.bind( keyboard ),
@@ -2750,6 +2979,7 @@ export default function( revealElement, options ) {
 		registerKeyboardShortcut: keyboard.registerKeyboardShortcut.bind( keyboard ),
 
 		getComputedSlideSize,
+		setCurrentScrollPage,
 
 		// Returns the current scale of the presentation content
 		getScale: () => scale,
@@ -2786,13 +3016,14 @@ export default function( revealElement, options ) {
 		getStatusText,
 
 		// Controllers
-		print,
 		focus,
+		scroll: scrollView,
 		progress,
 		controls,
 		location,
 		overview,
 		fragments,
+		backgrounds,
 		slideContent,
 		slideNumber,
 

js/utils/constants.js

@@ -8,3 +8,9 @@ export const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardSho
 
 // 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';

js/utils/util.js

@@ -295,3 +295,19 @@ const fileExtensionToMimeMap = {
 export const getMimeTypeFromFile = ( filename='' ) => {
 	return fileExtensionToMimeMap[filename.split('.').pop()]
 }
+
+/**
+ * Encodes a string for RFC3986-compliant URL format.
+ * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURI#encoding_for_rfc3986
+ *
+ * @param {string} url
+ */
+export const encodeRFC3986URI = ( url='' ) => {
+	return encodeURI(url)
+	  .replace(/%5B/g, "[")
+	  .replace(/%5D/g, "]")
+	  .replace(
+		/[!'()*]/g,
+		(c) => `%${c.charCodeAt(0).toString(16).toUpperCase()}`
+	  );
+}

media/Machine Learning Explained in 100 Seconds [PeMlggyqz0Y].tsv

@@ -0,0 +1,31 @@
+start	end	text
+0	6480	 Machine learning. Teach a computer how to perform a task, without explicitly programming it to perform said task.
+6620	13420	 Instead, feed data into an algorithm to gradually improve outcomes with experience, similar to how organic life learns.
+13580	20400	 The term was coined in 1959 by Arthur Samuel at IBM, who was developing artificial intelligence that could play checkers.
+20540	26880	 Half a century later, and predictive models are embedded in many of the products we use every day, which perform two fundamental jobs.
+26880	32040	 One is to classify data, like "Is there another car on the road?" or "Does this patient have cancer?"
+32040	38600	 The other is to make predictions about future outcomes, like "Will this stock go up?" or "Which YouTube video do you want to watch next?"
+38600	43280	 The first step in the process is to acquire and clean up data. Lots and lots of data.
+43480	47780	 The better the data represents the problem, the better the results. Garbage in, garbage out.
+47900	52160	 The data needs to have some kind of signal to be valuable to the algorithm for making predictions.
+52160	59920	 And data scientists perform a job called feature engineering to transform raw data into features that better represent the underlying problem.
+60240	64240	 The next step is to separate the data into a training set and testing set.
+64460	71800	 The training data is fed into an algorithm to build a model, then the testing data is used to validate the accuracy or error of the model.
+71980	77700	 The next step is to choose an algorithm, which might be a simple statistical model like linear or logistic regression,
+77940	81260	 or a decision tree that assigns different weights to features in the data.
+81260	86640	 Or you might get fancy with a convolutional neural network, which is an algorithm that also assigns
+86640	91300	 weights to features, but also takes the input data and creates additional features automatically.
+91640	96300	 And that's extremely useful for datasets that contain things like images or natural language,
+96420	99020	 where manual feature engineering is virtually impossible.
+99260	103960	 Every one of these algorithms learns to get better by comparing its predictions to an error function.
+104160	109840	 If it's a classification problem, like "Is this animal a cat or a dog?" the error function might be accuracy.
+109840	115900	 If it's a regression problem, like "How much will a loaf of bread cost next year?" then it might be mean absolute error.
+116220	121780	 Python is the language of choice among data scientists, but R and Julia are also popular options,
+121920	125320	 and there are many supporting frameworks out there to make the process approachable.
+125500	132680	 The end result of the machine learning process is a model, which is just a file that takes some input data in the same shape that it was trained on,
+132860	136900	 then spits out a prediction that tries to minimize the error that it was optimized for.
+136900	141980	 It can then be embedded on an actual device or deployed to the cloud to build a real-world product.
+142180	144500	 This has been Machine Learning in 100 Seconds.
+144580	147160	 Like and subscribe if you want to see more short videos like this,
+147320	150500	 and leave a comment if you want to see more machine learning content on this channel.
+150620	153040	 Thanks for watching, and I will see you in the next one.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "reveal.js",
-  "version": "4.4.0",
+  "version": "5.0.4",
   "description": "The HTML Presentation Framework",
   "homepage": "https://revealjs.com",
   "subdomain": "revealjs",
@@ -22,7 +22,7 @@
     "url": "git://github.com/hakimel/reveal.js.git"
   },
   "engines": {
-    "node": ">=10.0.0"
+    "node": ">=18.0.0"
   },
   "keywords": [
     "reveal",
@@ -30,33 +30,37 @@
     "presentation"
   ],
   "devDependencies": {
-    "@babel/core": "^7.14.3",
+    "@babel/core": "^7.23.2",
-    "@babel/eslint-parser": "^7.14.3",
+    "@babel/eslint-parser": "^7.22.15",
-    "@babel/preset-env": "^7.14.2",
+    "@babel/preset-env": "^7.23.2",
-    "@rollup/plugin-babel": "^5.3.0",
+    "@rollup/plugin-babel": "^6.0.4",
-    "@rollup/plugin-commonjs": "^19.0.0",
+    "@rollup/plugin-commonjs": "^25.0.7",
-    "@rollup/plugin-node-resolve": "^13.0.0",
+    "@rollup/plugin-node-resolve": "^15.2.3",
-    "babel-plugin-transform-html-import-to-string": "0.0.1",
+    "@rollup/plugin-terser": "^0.4.4",
+    "babel-plugin-transform-html-import-to-string": "2.0.0",
     "colors": "^1.4.0",
-    "core-js": "^3.12.1",
+    "core-js": "^3.33.1",
-    "fitty": "^2.3.0",
+    "fitty": "^2.3.7",
-    "glob": "^7.1.7",
+    "glob": "^10.3.10",
     "gulp": "^4.0.2",
     "gulp-autoprefixer": "^8.0.0",
-    "gulp-clean-css": "^4.2.0",
+    "gulp-clean-css": "^4.3.0",
     "gulp-connect": "^5.7.0",
     "gulp-eslint": "^6.0.0",
     "gulp-header": "^2.0.9",
     "gulp-tap": "^2.0.0",
-    "gulp-zip": "^4.2.0",
+    "gulp-zip": "^5.1.0",
-    "highlight.js": "^10.0.3",
+    "highlight.js": "^11.9.0",
-    "marked": "^4.0.12",
+    "marked": "^4.3.0",
-    "node-qunit-puppeteer": "^2.1.0",
+    "node-qunit-puppeteer": "^2.1.2",
-    "qunit": "^2.17.2",
+    "qunit": "^2.20.0",
-    "rollup": "^2.48.0",
+    "rollup": "^4.1.5",
-    "rollup-plugin-terser": "^7.0.2",
+    "sass": "^1.69.5",
-    "sass": "^1.39.2",
+    "yargs": "^17.7.2"
-    "yargs": "^15.1.0"
+  },
+  "overrides": {
+    "chokidar": "3.5.3",
+    "glob-parent": "6.0.2"
   },
   "browserslist": "> 2%, not dead",
   "eslintConfig": {

plugin/highlight/plugin.js

@@ -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.previousSibling, scrollState ) );
+					fragmentBlock.addEventListener( 'hidden', Plugin.scrollHighlightedLineIntoView.bind( Plugin, fragmentBlock.previousElementSibling, scrollState ) );
 
 				} );
 

plugin/markdown/plugin.js

@@ -7,13 +7,16 @@
 import { marked } from 'marked';
 
 const DEFAULT_SLIDE_SEPARATOR = '\r?\n---\r?\n',
-	  DEFAULT_NOTES_SEPARATOR = 'notes?:',
+	  DEFAULT_VERTICAL_SEPARATOR = null,
+	  DEFAULT_NOTES_SEPARATOR = '^\s*notes?:',
 	  DEFAULT_ELEMENT_ATTRIBUTES_SEPARATOR = '\\\.element\\\s*?(.+?)$',
 	  DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR = '\\\.slide:\\\s*?(\\\S.+?)$';
 
 const SCRIPT_END_PLACEHOLDER = '__SCRIPT_END__';
 
-const CODE_LINE_NUMBER_REGEX = /\[([\s\d,|-]*)\]/;
+// match an optional line number offset and highlight line numbers
+// [<line numbers>] or [<offset>: <line numbers>]
+const CODE_LINE_NUMBER_REGEX = /\[\s*((\d*):)?\s*([\s\d,|-]*)\]/;
 
 const HTML_ESCAPE_MAP = {
   '&': '&amp;',
@@ -35,22 +38,22 @@ const Plugin = () => {
 	function getMarkdownFromSlide( section ) {
 
 		// look for a <script> or <textarea data-template> wrapper
-		var template = section.querySelector( '[data-template]' ) || section.querySelector( 'script' );
+		const template = section.querySelector( '[data-template]' ) || section.querySelector( 'script' );
 
 		// strip leading whitespace so it isn't evaluated as code
-		var text = ( template || section ).textContent;
+		let text = ( template || section ).textContent;
 
 		// restore script end tags
 		text = text.replace( new RegExp( SCRIPT_END_PLACEHOLDER, 'g' ), '</script>' );
 
-		var leadingWs = text.match( /^\n?(\s*)/ )[1].length,
+		const leadingWs = text.match( /^\n?(\s*)/ )[1].length,
 			leadingTabs = text.match( /^\n?(\t*)/ )[1].length;
 
 		if( leadingTabs > 0 ) {
-			text = text.replace( new RegExp('\\n?\\t{' + leadingTabs + '}','g'), '\n' );
+			text = text.replace( new RegExp('\\n?\\t{' + leadingTabs + '}(.*)','g'), function(m, p1) { return '\n' + p1 ; } );
 		}
 		else if( leadingWs > 1 ) {
-			text = text.replace( new RegExp('\\n? {' + leadingWs + '}', 'g'), '\n' );
+			text = text.replace( new RegExp('\\n? {' + leadingWs + '}(.*)', 'g'), function(m, p1) { return '\n' + p1 ; } );
 		}
 
 		return text;
@@ -65,11 +68,11 @@ const Plugin = () => {
 	 */
 	function getForwardedAttributes( section ) {
 
-		var attributes = section.attributes;
+		const attributes = section.attributes;
-		var result = [];
+		const result = [];
 
-		for( var i = 0, len = attributes.length; i < len; i++ ) {
+		for( let i = 0, len = attributes.length; i < len; i++ ) {
-			var name = attributes[i].name,
+			const name = attributes[i].name,
 				value = attributes[i].value;
 
 			// disregard attributes that are used for markdown loading/parsing
@@ -92,10 +95,12 @@ const Plugin = () => {
 	 * values for what's not defined.
 	 */
 	function getSlidifyOptions( options ) {
+		const markdownConfig = deck?.getConfig?.().markdown;
 
 		options = options || {};
-		options.separator = options.separator || DEFAULT_SLIDE_SEPARATOR;
+		options.separator = options.separator || markdownConfig?.separator || DEFAULT_SLIDE_SEPARATOR;
-		options.notesSeparator = options.notesSeparator || DEFAULT_NOTES_SEPARATOR;
+		options.verticalSeparator = options.verticalSeparator || markdownConfig?.verticalSeparator || DEFAULT_VERTICAL_SEPARATOR;
+		options.notesSeparator = options.notesSeparator || markdownConfig?.notesSeparator || DEFAULT_NOTES_SEPARATOR;
 		options.attributes = options.attributes || '';
 
 		return options;
@@ -109,7 +114,7 @@ const Plugin = () => {
 
 		options = getSlidifyOptions( options );
 
-		var notesMatch = content.split( new RegExp( options.notesSeparator, 'mgi' ) );
+		const notesMatch = content.split( new RegExp( options.notesSeparator, 'mgi' ) );
 
 		if( notesMatch.length === 2 ) {
 			content = notesMatch[0] + '<aside class="notes">' + marked(notesMatch[1].trim()) + '</aside>';
@@ -131,10 +136,10 @@ const Plugin = () => {
 
 		options = getSlidifyOptions( options );
 
-		var separatorRegex = new RegExp( options.separator + ( options.verticalSeparator ? '|' + options.verticalSeparator : '' ), 'mg' ),
+		const separatorRegex = new RegExp( options.separator + ( options.verticalSeparator ? '|' + options.verticalSeparator : '' ), 'mg' ),
 			horizontalSeparatorRegex = new RegExp( options.separator );
 
-		var matches,
+		let matches,
 			lastIndex = 0,
 			isHorizontal,
 			wasHorizontal = true,
@@ -143,7 +148,7 @@ const Plugin = () => {
 
 		// iterate until all blocks between separators are stacked up
 		while( matches = separatorRegex.exec( markdown ) ) {
-			var notes = null;
+			const notes = null;
 
 			// determine direction (horizontal by default)
 			isHorizontal = horizontalSeparatorRegex.test( matches[0] );
@@ -172,10 +177,10 @@ const Plugin = () => {
 		// add the remaining slide
 		( wasHorizontal ? sectionStack : sectionStack[sectionStack.length-1] ).push( markdown.substring( lastIndex ) );
 
-		var markdownSections = '';
+		let markdownSections = '';
 
 		// flatten the hierarchical stack, and insert <section data-markdown> tags
-		for( var i = 0, len = sectionStack.length; i < len; i++ ) {
+		for( let i = 0, len = sectionStack.length; i < len; i++ ) {
 			// vertical
 			if( sectionStack[i] instanceof Array ) {
 				markdownSections += '<section '+ options.attributes +'>';
@@ -204,7 +209,7 @@ const Plugin = () => {
 
 		return new Promise( function( resolve ) {
 
-			var externalPromises = [];
+			const externalPromises = [];
 
 			[].slice.call( scope.querySelectorAll( 'section[data-markdown]:not([data-markdown-parsed])') ).forEach( function( section, i ) {
 
@@ -257,13 +262,13 @@ const Plugin = () => {
 
 		return new Promise( function( resolve, reject ) {
 
-			var xhr = new XMLHttpRequest(),
+			const xhr = new XMLHttpRequest(),
 				url = section.getAttribute( 'data-markdown' );
 
-			var datacharset = section.getAttribute( 'data-charset' );
+			const datacharset = section.getAttribute( 'data-charset' );
 
 			// see https://developer.mozilla.org/en-US/docs/Web/API/element.getAttribute#Notes
-			if( datacharset != null && datacharset != '' ) {
+			if( datacharset !== null && datacharset !== '' ) {
 				xhr.overrideMimeType( 'text/html; charset=' + datacharset );
 			}
 
@@ -308,17 +313,17 @@ const Plugin = () => {
 	 */
 	function addAttributeInElement( node, elementTarget, separator ) {
 
-		var mardownClassesInElementsRegex = new RegExp( separator, 'mg' );
+		const markdownClassesInElementsRegex = new RegExp( separator, 'mg' );
-		var mardownClassRegex = new RegExp( "([^\"= ]+?)=\"([^\"]+?)\"|(data-[^\"= ]+?)(?=[\" ])", 'mg' );
+		const markdownClassRegex = new RegExp( "([^\"= ]+?)=\"([^\"]+?)\"|(data-[^\"= ]+?)(?=[\" ])", 'mg' );
-		var nodeValue = node.nodeValue;
+		let nodeValue = node.nodeValue;
-		var matches,
+		let matches,
 			matchesClass;
-		if( matches = mardownClassesInElementsRegex.exec( nodeValue ) ) {
+		if( matches = markdownClassesInElementsRegex.exec( nodeValue ) ) {
 
-			var classes = matches[1];
+			const classes = matches[1];
-			nodeValue = nodeValue.substring( 0, matches.index ) + nodeValue.substring( mardownClassesInElementsRegex.lastIndex );
+			nodeValue = nodeValue.substring( 0, matches.index ) + nodeValue.substring( markdownClassesInElementsRegex.lastIndex );
 			node.nodeValue = nodeValue;
-			while( matchesClass = mardownClassRegex.exec( classes ) ) {
+			while( matchesClass = markdownClassRegex.exec( classes ) ) {
 				if( matchesClass[2] ) {
 					elementTarget.setAttribute( matchesClass[1], matchesClass[2] );
 				} else {
@@ -336,34 +341,34 @@ const Plugin = () => {
 	 */
 	function addAttributes( section, element, previousElement, separatorElementAttributes, separatorSectionAttributes ) {
 
-		if ( element != null && element.childNodes != undefined && element.childNodes.length > 0 ) {
+		if ( element !== null && element.childNodes !== undefined && element.childNodes.length > 0 ) {
-			var previousParentElement = element;
+			let previousParentElement = element;
-			for( var i = 0; i < element.childNodes.length; i++ ) {
+			for( let i = 0; i < element.childNodes.length; i++ ) {
-				var childElement = element.childNodes[i];
+				const childElement = element.childNodes[i];
 				if ( i > 0 ) {
-					var j = i - 1;
+					let j = i - 1;
 					while ( j >= 0 ) {
-						var aPreviousChildElement = element.childNodes[j];
+						const aPreviousChildElement = element.childNodes[j];
-						if ( typeof aPreviousChildElement.setAttribute == 'function' && aPreviousChildElement.tagName != "BR" ) {
+						if ( typeof aPreviousChildElement.setAttribute === 'function' && aPreviousChildElement.tagName !== "BR" ) {
 							previousParentElement = aPreviousChildElement;
 							break;
 						}
 						j = j - 1;
 					}
 				}
-				var parentSection = section;
+				let parentSection = section;
-				if( childElement.nodeName ==  "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 ( element.nodeType === Node.COMMENT_NODE ) {
-			if ( addAttributeInElement( element, previousElement, separatorElementAttributes ) == false ) {
+			if ( addAttributeInElement( element, previousElement, separatorElementAttributes ) === false ) {
 				addAttributeInElement( element, section, separatorSectionAttributes );
 			}
 		}
@@ -375,14 +380,14 @@ const Plugin = () => {
 	 */
 	function convertSlides() {
 
-		var sections = deck.getRevealElement().querySelectorAll( '[data-markdown]:not([data-markdown-parsed])');
+		const sections = deck.getRevealElement().querySelectorAll( '[data-markdown]:not([data-markdown-parsed])');
 
 		[].slice.call( sections ).forEach( function( section ) {
 
 			section.setAttribute( 'data-markdown-parsed', true )
 
-			var notes = section.querySelector( 'aside.notes' );
+			const notes = section.querySelector( 'aside.notes' );
-			var markdown = getMarkdownFromSlide( section );
+			const markdown = getMarkdownFromSlide( section );
 
 			section.innerHTML = marked( markdown );
 			addAttributes( 	section, section, null, section.getAttribute( 'data-element-attributes' ) ||
@@ -429,14 +434,23 @@ const Plugin = () => {
 				renderer.code = ( code, language ) => {
 
 					// Off by default
+					let lineNumberOffset = '';
 					let lineNumbers = '';
 
 					// Users can opt in to show line numbers and highlight
 					// specific lines.
 					// ```javascript []        show line numbers
 					// ```javascript [1,4-8]   highlights lines 1 and 4-8
+					// optional line number offset:
+					// ```javascript [25: 1,4-8]   start line numbering at 25,
+					//                             highlights lines 1 (numbered as 25) and 4-8 (numbered as 28-32)
 					if( CODE_LINE_NUMBER_REGEX.test( language ) ) {
-						lineNumbers = language.match( CODE_LINE_NUMBER_REGEX )[1].trim();
+						let lineNumberOffsetMatch =  language.match( CODE_LINE_NUMBER_REGEX )[2];
+						if (lineNumberOffsetMatch){
+							lineNumberOffset =  `data-ln-start-from="${lineNumberOffsetMatch.trim()}"`;
+						}
+
+						lineNumbers = language.match( CODE_LINE_NUMBER_REGEX )[3].trim();
 						lineNumbers = `data-line-numbers="${lineNumbers}"`;
 						language = language.replace( CODE_LINE_NUMBER_REGEX, '' ).trim();
 					}
@@ -446,7 +460,9 @@ const Plugin = () => {
 					// highlight.js is able to read it
 					code = escapeForHTML( code );
 
-					return `<pre><code ${lineNumbers} class="${language}">${code}</code></pre>`;
+					// return `<pre><code ${lineNumbers} class="${language}">${code}</code></pre>`;
+
+					return `<pre><code ${lineNumbers} ${lineNumberOffset} class="${language}">${code}</code></pre>`;
 				};
 			}
 

plugin/math/math.esm.js

@@ -3,4 +3,4 @@ const t=()=>{let t,e={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(",
  * This plugin is a wrapper for the MathJax2,
  * MathJax3 and KaTeX typesetter plugins.
  */
-var a=Plugin=Object.assign(e(),{KaTeX:()=>{let t,e={version:"latest",delimiters:[{left:"$$",right:"$$",display:!0},{left:"$",right:"$",display:!1},{left:"\\(",right:"\\)",display:!1},{left:"\\[",right:"\\]",display:!0}],ignoredTags:["script","noscript","style","textarea","pre"]};const a=t=>new Promise(((e,a)=>{const n=document.createElement("script");n.type="text/javascript",n.onload=e,n.onerror=a,n.src=t,document.head.append(n)}));return{id:"katex",init:function(n){t=n;let i=t.getConfig().katex||{},s={...e,...i};const{local:l,version:o,extensions:r,...c}=s;let d=s.local||"https://cdn.jsdelivr.net/npm/katex",p=s.local?"":"@"+s.version,u=d+p+"/dist/katex.min.css",h=d+p+"/dist/contrib/mhchem.min.js",x=d+p+"/dist/contrib/auto-render.min.js",m=[d+p+"/dist/katex.min.js"];s.extensions&&s.extensions.includes("mhchem")&&m.push(h),m.push(x);const f=()=>{renderMathInElement(n.getSlidesElement(),c),t.layout()};(t=>{let e=document.createElement("link");e.rel="stylesheet",e.href=t,document.head.appendChild(e)})(u),async function(t){for(const e of t)await a(e)}(m).then((()=>{t.isReady()?f():t.on("ready",f.bind(this))}))}}},MathJax2:t,MathJax3:()=>{let t,e={tex:{inlineMath:[["$","$"],["\\(","\\)"]]},options:{skipHtmlTags:["script","noscript","style","textarea","pre"]},startup:{ready:()=>{MathJax.startup.defaultReady(),MathJax.startup.promise.then((()=>{Reveal.layout()}))}}};return{id:"mathjax3",init:function(a){t=a;let n=t.getConfig().mathjax3||{},i={...e,...n};i.tex={...e.tex,...n.tex},i.options={...e.options,...n.options},i.startup={...e.startup,...n.startup};let s=i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js";i.mathjax=null,window.MathJax=i,function(t,e){let a=document.createElement("script");a.type="text/javascript",a.id="MathJax-script",a.src=t,a.async=!0,a.onload=()=>{"function"==typeof e&&(e.call(),e=null)},document.head.appendChild(a)}(s,(function(){Reveal.addEventListener("slidechanged",(function(t){MathJax.typeset()}))}))}}}});export default a;
+var a=Plugin=Object.assign(e(),{KaTeX:()=>{let t,e={version:"latest",delimiters:[{left:"$$",right:"$$",display:!0},{left:"$",right:"$",display:!1},{left:"\\(",right:"\\)",display:!1},{left:"\\[",right:"\\]",display:!0}],ignoredTags:["script","noscript","style","textarea","pre"]};const a=t=>new Promise(((e,a)=>{const n=document.createElement("script");n.type="text/javascript",n.onload=e,n.onerror=a,n.src=t,document.head.append(n)}));return{id:"katex",init:function(n){t=n;let i=t.getConfig().katex||{},s={...e,...i};const{local:l,version:o,extensions:r,...c}=s;let d=s.local||"https://cdn.jsdelivr.net/npm/katex",p=s.local?"":"@"+s.version,u=d+p+"/dist/katex.min.css",h=d+p+"/dist/contrib/mhchem.min.js",x=d+p+"/dist/contrib/auto-render.min.js",m=[d+p+"/dist/katex.min.js"];s.extensions&&s.extensions.includes("mhchem")&&m.push(h),m.push(x);const f=()=>{renderMathInElement(n.getSlidesElement(),c),t.layout()};(t=>{let e=document.createElement("link");e.rel="stylesheet",e.href=t,document.head.appendChild(e)})(u),async function(t){for(const e of t)await a(e)}(m).then((()=>{t.isReady()?f():t.on("ready",f.bind(this))}))}}},MathJax2:t,MathJax3:()=>{let t,e={tex:{inlineMath:[["$","$"],["\\(","\\)"]]},options:{skipHtmlTags:["script","noscript","style","textarea","pre"]},startup:{ready:()=>{MathJax.startup.defaultReady(),MathJax.startup.promise.then((()=>{Reveal.layout()}))}}};return{id:"mathjax3",init:function(a){t=a;let n=t.getConfig().mathjax3||{},i={...e,...n};i.tex={...e.tex,...n.tex},i.options={...e.options,...n.options},i.startup={...e.startup,...n.startup};let s=i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js";i.mathjax=null,window.MathJax=i,function(t,e){let a=document.createElement("script");a.type="text/javascript",a.id="MathJax-script",a.src=t,a.async=!0,a.onload=()=>{"function"==typeof e&&(e.call(),e=null)},document.head.appendChild(a)}(s,(function(){Reveal.addEventListener("slidechanged",(function(t){MathJax.typeset()}))}))}}}});export{a as default};

plugin/notes/plugin.js

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

plugin/notes/speaker-view.html

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

plugin/search/plugin.js

@@ -137,7 +137,7 @@ const Plugin = () => {
 
 		this.setRegex = function(input)
 		{
-			input = input.replace(/^[^\w]+|[^\w]+$/g, "").replace(/[^\w'-]+/g, "|");
+			input = input.trim();
 			matchRegex = new RegExp("(" + input + ")","i");
 		}
 

plugin/search/search.esm.js

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

plugin/search/search.js

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

plugin/zoom/zoom.esm.js

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

test/test-auto-animate.html

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

test/test-dependencies-async.html

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

test/test-dependencies.html

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

test/test-grid-navigation.html

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