Elements are assigned the .up-destroying
class before they are destroyed
or while they are being removed by a transition.
If the removal is animated, the class is assigned before the animation starts.
Elements that are being destroyed (but still animating) are ignored by all functions for fragment lookup:
Note that the low-level DOM helpers in up.element
will not ignore elements that are being destroyed.
While an element's destruction is animating, the element is also assigned an
[aria-hidden]
attribute.
This hides the element from the browser's accessibility API.