Add 'window' as fallback for globalThis or this.

Resolves #253.

Author: NeilFraser

acorn.js

@@ -30,14 +30,15 @@
   if (typeof exports === "object" && typeof module === "object") return mod(exports); // CommonJS
   if (typeof define === "function" && define.amd) return define(["exports"], mod); // AMD
   mod(root.acorn || (root.acorn = {})); // Plain browser env
-})((typeof globalThis === 'undefined') ? this : globalThis, function(exports) {
+})((typeof globalThis === 'undefined') ? this || window : globalThis, function(exports) {
   "use strict";
 
   exports.version = "0.5.0";
   // Plus additional edits marked with 'JS-Interpreter change' comments.
 
   // JS-Interpreter change:
-  // For global object, use 'globalThis' if it exists, fall back to 'this'.
+  // For global object, use 'globalThis' if it exists,
+  // fall back to 'this' or 'window'.  Same logic as in JS-Interpreter.
   // -- Neil Fraser, March 2024.
 
   // JS-Interpreter change:

acorn_interpreter.js

@@ -201,11 +201,12 @@ Interpreter.vm = null;
 Interpreter.currentInterpreter_ = null;
 
 /**
- * The global object (`window` in a browser, `global` in node.js) is usually
- * `globalThis`, but older systems use `this`.
+ * The global object.  Ideally use `globalThis`.  Failing that try `this` or
+ * `window`.  Other options to consider are `self` and `global`.
+ * Same logic as in Acorn.
  */
 Interpreter.nativeGlobal =
-    (typeof globalThis === 'undefined') ? this : globalThis;
+    (typeof globalThis === 'undefined') ? this || window : globalThis;
 
 /**
  * Code for executing regular expressions in a thread.