Can we proxy the window object?

Can we proxy the window object? This question was posed by the chat with ChatGPT.
intercept-the-getter-of-window-object.txt

ChatGPT's Code made it look like that it is possible to proxy the window object.
But the code gives the following error:

Uncaught TypeError: Cannot redefine property: window
    at Object.defineProperty ()
    at task.php:87:8

You can see it in  the console.

Acutally, any attempts to assign something to the window object fails.
Here are examples of failures:

window=111;
window.window=222;
globalThis.window=333;

All of them produce the following error message:

Uncaught TypeError: Cannot set property window of # which has only a getter at task.php

So why does ChatGPT talk as if it were possible? Maybe, it is talking about old versions of browsers?