From c76f7558637ab53cdca1820d8f2e485a28be15ad Mon Sep 17 00:00:00 2001
From: FredyC <fredy.c@seznam.cz>
Date: Sat, 22 Aug 2015 06:09:42 +0200
Subject: [PATCH] safer type checking for iterable structures

---
 src/react/JSONTree/obj-type.js | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/react/JSONTree/obj-type.js b/src/react/JSONTree/obj-type.js
index 095ee2d7..40dfd8d1 100644
--- a/src/react/JSONTree/obj-type.js
+++ b/src/react/JSONTree/obj-type.js
@@ -1,7 +1,6 @@
 export default function(obj) {
-  const type = Object.prototype.toString.call(obj).slice(8, -1);
-  if (type === 'Object' && typeof obj[Symbol.iterator] === 'function') {
+  if (obj !== null && typeof obj === 'object' && typeof obj[Symbol.iterator] === 'function') {
     return 'Iterable';
   }
-  return type;
+  return Object.prototype.toString.call(obj).slice(8, -1);
 }