Access the dimensions and position of this element's content + padding box.
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.
Important note: use of this method will perform CSS calculations that can trigger a browser reflow. Therefore, use of this property during an animation frame is discouraged. See also: Browser Reflow