Accessing the global scope

Hello again!
I've been trying to figure out a way around this problem I've run into. QuickJS creates its own scope within Godot, but I need to access the javascript, the window variable, or the document variable included with the HTML document from a web build and I don't think that's possible.

Alternatively I could also import the js file into Godot and run it, but this js file attaches its methods to the window, and since window is not defined, there's no way to access them.

Has anyone else run into this problem?