Свойство onOnline
переопределение
Поток событий online, обрабатываемых этим BodyElement.
Реализация
ElementStream<Event> get onOnline => onlineEvent.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/onOnline.html
