Merge pull request linkeddata#99 from linkeddata/dz_fix_reference_error

Andrei · Andrei · commit fea6b16f76c5 · 2016-02-10T10:41:13.000-05:00
Fix reference error
diff --git a/util.js b/util.js
@@ -118,13 +118,13 @@ $rdf.Util = {
     */
     XMLHTTPFactory: function () {
       // Running inside the Tabulator Firefox extension
-      if (tabulator !== undefined && tabulator.isExtension) {
+      if (typeof tabulator !== 'undefined' && tabulator.isExtension) {
         // Cannot use XMLHttpRequest natively, must request it through SDK
         return Components
           .classes["@mozilla.org/xmlextras/xmlhttprequest;1"]
           .createInstance()
           .QueryInterface(Components.interfaces.nsIXMLHttpRequest)
-      } else if (window !== undefined && 'XMLHttpRequest' in window) {
+      } else if (typeof window !== 'undefined' && 'XMLHttpRequest' in window) {
         // Running inside the browser
         var XMLHttpRequest = window.XMLHttpRequest
         return new XMLHttpRequest()
