contentRect property Null safety

DOMRectReadOnly contentRect

A DOMRectReadOnly object containing the new size of the observed element when the callback is run. Note that this is better supported than the above two properties, but it is left over from an earlier implementation of the Resize Observer API, is still included in the spec for web compat reasons, and may be deprecated in future versions.

Implementation

external DOMRectReadOnly get contentRect;