progressEvent constant
EventStreamProvider<ProgressEvent> progressEvent = const EventStreamProvider<ProgressEvent>Static factory designed to expose progress
events to event handlers that are not necessarily instances of FileWriter.
See EventStreamProvider for usage information.
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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-html/FileWriter/progressEvent-constant.html