Is it possible to add styles to cookies?

Question

PHP

Let's say there are two blocks
(style="display:none")Block 1
(style="display:block")Block 2
I want to make sure that styles are written to the cookie on click, but vice versa. That is, so that after clicking, the styles change:
(style="display:block")Block 1
(style="display:none")Block 2
Accordingly, after clearing the cookie, everything fell into place.
So, is it really possible to do this through cookies? Or, better through the session?

Answer 1

> Is it possible to add styles to cookies?
Maybe why not. More precisely, add a sign that the button was pressed. And depending on it, hang styles.
> Or, it is better through session?
So session also uses cookies for storage of all parameters.

Answer 2

Do it in LocalStorage. As for me, sessions and cookies are suitable for identification, rather than storing something left there. And LocalStorage is just right for this. Here the choice is yours. (For example, I store such data in LocalStorage)