Plygon

Hi @diasbruno, I completely agree that it doesn't make much sense to conditionally render a modal. The example only does so for simplicity's sake. A more complete example would have...

Maybe the actions in `beforeOpen` can be called after the `isOpen` state is set to true, instead of before. That way it won't add the class until the state is...

This issue has already been noted in https://github.com/ManimCommunity/manim/issues/3005. I forked Manim and applied behackl's suggestion from that repo, and that has done the trick for me.