Interaction with the plugin JS

Is it possible to interact with the plugin JavaScript? I will explain what I mean.

Imagine, I’m trying to customize the display of a quiz. I’m adding some text, buttons, links to the questions etc. I can do this via PHP. But when a quiz starts, it works via JavaScript. How can I get (listen) to its variables, i.e. “current question ID”, “current question text”, “current quiz state” etc.? Maybe, there is a possibility to run custom callbacks “onQuizQuestionChanged” or “onQuizStateChanged” or something like this?

I understand, it could be impossible. Then please confirm this.

Thanks.