onStorageChange property

Implementation

static Stream<WebStorageEvent> get onStorageChange {
  StreamController<WebStorageEvent>? controller;

  // Event listener reacting on storage changes.
  void storageListener(web.Event event) {
    event as web.StorageEvent;
    controller!.add(
      WebStorageEvent(
        key: event.key,
        newValue: event.newValue,
        oldValue: event.oldValue,
      ),
    );
  }

  controller = StreamController(
    onListen: () =>
        web.window.addEventListener('storage', storageListener.toJS),
    onCancel: () =>
        web.window.removeEventListener('storage', storageListener.toJS),
  );

  return controller.stream;
}