From 47463161b402b7bc2a7e347ec9ff22928ba3a620 Mon Sep 17 00:00:00 2001
From: abraham lam <abrlam@yahoo.com>
Date: Mon, 10 Aug 2020 11:22:19 -0400
Subject: [PATCH] revised tileSize check as suggested by @msalsbery

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

diff --git a/src/zoomifytilesource.js b/src/zoomifytilesource.js
index 3cf48071..7b62a6a8 100644
--- a/src/zoomifytilesource.js
+++ b/src/zoomifytilesource.js
@@ -44,7 +44,7 @@
      * @param {String} tilesUrl
      */
     $.ZoomifyTileSource = function(options) {
-        if(options.tileSize === undefined){
+        if(typeof options.tileSize === 'undefined'){
             options.tileSize = 256;
         }