From d14727b40747a032fe6f5aec89afea03e4bbb9cb Mon Sep 17 00:00:00 2001
From: Hakim El Hattab <hakim.elhattab@gmail.com>
Date: Wed, 6 May 2015 11:28:21 +0200
Subject: [PATCH] type check to ensure we don't call media api before media has
 loaded

---
 js/reveal.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/js/reveal.js b/js/reveal.js
index ecba3a9..7619005 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -2904,7 +2904,7 @@
 
 			// HTML5 media elements
 			toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
-				if( el.hasAttribute( 'data-autoplay' ) ) {
+				if( el.hasAttribute( 'data-autoplay' ) && typeof el.play === 'function' ) {
 					el.play();
 				}
 			} );
@@ -2945,7 +2945,7 @@
 		if( slide && slide.parentNode ) {
 			// HTML5 media elements
 			toArray( slide.querySelectorAll( 'video, audio' ) ).forEach( function( el ) {
-				if( !el.hasAttribute( 'data-ignore' ) ) {
+				if( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {
 					el.pause();
 				}
 			} );