Fixed #501: avoid "originalEvent" is undefined

fengyuanchen · Nov 3, 2015 · 410c0c5 · 410c0c5
1 parent 88ca6d9
commit 410c0c5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/js/handlers.js b/src/js/handlers.js
@@ -42,7 +42,7 @@
 
     wheel: function (event) {
       var originalEvent = event.originalEvent;
-      var e = originalEvent;
+      var e = originalEvent || event;
       var ratio = num(this.options.wheelZoomRatio) || 0.1;
       var delta = 1;