Access dimensions and position of the first Element's content + padding box in this list.
This returns a rectangle with the dimenions actually available for content
in this element, in pixels, regardless of this element's box-sizing
property. Unlike getBoundingClientRect, the dimensions of this rectangle
will return the same numerical height if the element is hidden or not. This
can be used to retrieve jQuery's innerHeight value for an element. This
is also a rectangle equalling the dimensions of clientHeight and
clientWidth.
Source
@Experimental() CssRect get paddingEdge;