From 7e99626b142b334d2563660d260ffa96ccf34fcf Mon Sep 17 00:00:00 2001
From: Maarten Schroeven <maarten.schroeven@kbc.be>
Date: Thu, 18 Aug 2016 10:56:59 +0200
Subject: [PATCH] only use nodeType 1 and 3 (only relevant types)

---
 js/reveal.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/reveal.js b/js/reveal.js
index b0bc9359fe0..e78cb8f4095 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -558,7 +558,7 @@
 		var text = "";
 		if(node.nodeType === 3) { //text node
 			text += node.textContent;
-		}else {
+		}else if (node.nodeType === 1) { //element node
 			var isAriaHidden = node.getAttribute('aria-hidden');
 			var isDisplayHidden = window.getComputedStyle(node)['display'] === 'none';
 			if (isAriaHidden !== 'true' && !isDisplayHidden) {