Свойство onVolumeChange

Источник

@DomName('Window.onvolumechange')
@DocsEditable()
Stream<Event> get onVolumeChange => Element.volumeChangeEvent.forTarget(this);

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-html/Window/onVolumeChange.html