Animate a div layer popping up

Question

I'd like to create this layering effect with a div popping up and floating above the original.

https://d13yacurqjgara.cloudfront.net/users/22691/screenshots/1644434/gif_animation.gif

Is there an animation framework that would work best for this? Is it best to do it with javascript? or maybe css?

Answer 1

原来，Bounce.js正是我想要的。