Animate the HTML page appearance

I created a button using info form the sample beastify. Is there some CSS or other way to control the animation of the show/hide drop-down form (ie transform, ease-in for the HTML page

You can not control the popup animation. You can control how your page loaded in it behaves.

what about opacity of the page - fade in/out?

Sure, but the panel will have a solid background color at all times.

so I cant control the page opacity, just the elements on the page itself?

Yes, as I said, you can’t control the animation of the actual popup, only its contents. It’ll also be hard to have an animation when the popup gets closed due to focus loss.

ok - got it. thank you