From 57aff81777c10aa36d7ba538f29c6c9118e50a45 Mon Sep 17 00:00:00 2001
From: Mohamad Jahani <m4m4lj@gmail.com>
Date: Fri, 25 Sep 2015 20:52:03 +0330
Subject: [PATCH] check single element type to be html image element

---
 snaphash.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/snaphash.js b/snaphash.js
index cd2cac0..b525001 100644
--- a/snaphash.js
+++ b/snaphash.js
@@ -8,13 +8,13 @@
     }
 
     // selector provided
-    if (typeof els === 'string') {
+    else if (typeof els === 'string') {
       els = document.querySelectorAll(els);
     }
 
-    // single element provided
-    if (typeof els.length === 'undefined') {
-      els = [els];
+    // single element provided (only image element)
+    else if (!els instanceof HTMLImageElement) {
+      throw TypeError("Can not apply Snaphash to " + els.constructor.name + " type. You must provide an image element/selector");
     }
 
     // loop over elements