From ea735f0a2f4983a54bed94e2ce83f6ebe297a225 Mon Sep 17 00:00:00 2001
From: Hakim El Hattab <hakim.elhattab@gmail.com>
Date: Wed, 25 Feb 2015 13:26:45 +0100
Subject: [PATCH] ensure postmessage data is a string #1143

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

diff --git a/js/reveal.js b/js/reveal.js
index 0e60745..850f431 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -795,7 +795,7 @@
 				var data = event.data;
 
 				// Make sure we're dealing with JSON
-				if( data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {
+				if( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {
 					data = JSON.parse( data );
 
 					// Check if the requested method can be found