Is it possible to track the creation/access to variables?

Question

JavaScript

Good day !
I would like to try to understand approximately what data the js script collects from the browser, but it is minified or obfuscated, or all at once =/

Unfortunately, these changes cannot be played back due to the strong coherence of the code.

As I see it approximately, for example, something like this, an example for functions:

function hookAlert(){
    var oldAlert = alert;
    alert = (msg) => {
        console.log("alert used");
        oldAlert(msg);
    }
}

Maybe this is not the best option, but this is the simplest of what came to mind.

Perhaps there are separate browser versions or js emulators for reversing?