How to test sidebar exit?

Question

Software testing

Hello, please tell me how to logically understand that the sidebar, for example, has left?

Initial data:
There is a site, it has a sidebar (with a menu), which, when you click on the button in the header, should go out, then you need to click on the menu in the sidebar.

So, please tell me what to be attached to in this case?
Check if the class responsible for applying sidebar exit styles has appeared, then, when closing the sidebar, check if this class is gone ?

Or is it done differently?

Answer 1

When the sidebar slides out, new elements appear on the page. By them and look

Answer 2

It depends on - is there a hover (haver) or a click on the menu so that the sidebar leaves?
And yes, most likely there are new elements that you can automate in the future. The best thing would be to see your screen recording or at least part of the code