Calls to window and document in src/core/ no longer break non-browser environments

src/core/operations/URL.js

@@ -58,6 +58,10 @@ const URL_ = {
      * @returns {string}
      */
     runParse: function(input, args) {
+        if (!document) {
+            throw "This operation only works in a browser.";
+        }
+        
         var a = document.createElement("a");
 
         // Overwrite base href which will be the current CyberChef URL to reduce confusion.