directive in module ngAnimate
ngAnimateChildren allows you to specify that children of this element should animate even if any of the children's parents are currently animating. By default, when an element has an active enter, leave, or move (structural) animation, child elements that also have an active structural animation are not animated. Note that even if ngAnimteChildren is set, no child animations will run when the parent element is removed from the DOM (leave animation).
Directiv