Check that window.jQuery an object

Author: atoff

src/util/cloneObject.ts

@@ -11,7 +11,7 @@ export default function cloneObject<T>(source: T): T {
 
   for (const key in source) {
     // @ts-ignore:next-line
-    if ("jQuery" in window && source[key] instanceof window.jQuery) {
+    if ("jQuery" in window && window.jQuery && source[key] instanceof window.jQuery) {
       temp[key] = source[key];
     } else {
       temp[key] = cloneObject(source[key]);