From 0b6585bd44fe86344408d9d3ab8d3c17e254738a Mon Sep 17 00:00:00 2001
From: Hakim El Hattab <hakim.elhattab@gmail.com>
Date: Wed, 5 Oct 2016 11:23:41 +0200
Subject: [PATCH] prevent exception when initializing with no slides #1678
 #1679

---
 js/reveal.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/js/reveal.js b/js/reveal.js
index 09cc5b6..675f5ad 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -2137,6 +2137,9 @@
 		// Query all horizontal slides in the deck
 		var horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
 
+		// Abort if there are no slides
+		if( horizontalSlides.length === 0 ) return;
+
 		// If no vertical index is specified and the upcoming slide is a
 		// stack, resume at its previous vertical index
 		if( v === undefined && !isOverview() ) {