Invisible Button

I have an invisible button ( Opacity set at 0 ) before a scroll, and appearing at 100% when in the right scroll percentage, the question I have is can I disable the button until it is at 100% opacity and not before?
The problem right now is a mouse over or a mouse click into empty space trigger the button while invisible. There must be a way to do that? Thank you!

No @PascalDangin, that isn’t possible at the moment in Sparkle.
But you could introduce a section animation like vertical. So you could have the button coming up the page on animation into position and then have it set so it appears (opacity 100%) as the button sits in place.

Or just use the vertical animation on its own?..

Ok Got it. Thank you