https://api.flutter.dev/flutter/dart-html/Window/requestFileSystem.html
requestFileSystem method - Window class - dart:html library - Dart API
API docs for the requestFileSystem method from the Window class, for the Dart programming language.
methodwindowclassdarthtml
https://lists.whatwg.org/pipermail/whatwg-whatwg.org/2011-November/076199.html
[whatwg] Using requestFileSystem to setup mounts
whatwgusingsetupmounts