Свойство relatedTarget
Реализация
EventTarget? get relatedTarget =>
_convertNativeToDart_EventTarget(this._get_relatedTarget);
© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-html/FocusEvent/relatedTarget.html
