свойство onFocus
override
Поток событий focus, обрабатываемых этим BodyElement.
Реализация
ElementStream<Event> get onFocus => focusEvent.forElement(this);
© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.19.6/dart-html/BodyElement/onFocus.html
