This is a good idea but I don’t know how to implement it in JS. Probably, I’d need to have a list of all focusable elements, e.g. form elements, elements with t

This is a good idea but I don’t know how to implement it in JS. Probably, I’d need to have a list of all focusable elements, e.g. form elements, elements with tabindex attribute and links (for some browsers). Hidden elements should be excluded. This list should be updated on DOM changes. Sounds complicated already, I don’t think it would be robust.