Свойство onLoadedMetadata
Реализация
Stream<Event> get onLoadedMetadata =>
Element.loadedMetadataEvent.forTarget(this);
© 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/Document/onLoadedMetadata.html
