Static factory designed to expose progress
events to event handlers that are not necessarily instances of ApplicationCache.
See EventStreamProvider for usage information.
static const EventStreamProvider<ProgressEvent> progressEvent = const EventStreamProvider<ProgressEvent>('progress')
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-html/ApplicationCache/progressEvent-constant.html