DELAY in showing a widget

Two tyoes of DELAY:

1. just delay in showing a widget -- it returns nothing
2. delay in showing a widget -- it returns something after await -- asychronous code (needs Future)

using Timer + Visibility

class DelayedVisibilityListView extends StatefulWidget {
  const DelayedVisibilityListView({super.key});

  @override
  State<DelayedVisibilityListView> createState() =>
      _DelayedVisibilityListViewState();
}

class _DelayedVisibilityListViewState extends State<DelayedVisibilityListView> {
  bool show = false;
  Timer? timer;

  @override
  void initState() {
    super.initState();

    /// Initialize timer for 3 seconds, it will be active as soon as intialized
    timer = Timer(
      const Duration(seconds: 3),
      () {
        /// Navigate to seconds screen when timer callback in executed
        setState(() {
          show = true;
        });
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Visibility(
      visible: show,
      child: ListView(
        shrinkWrap: true,
        // physics: ScrollPhysics(),
        children: [
            /*  */

info

https://www.flutterbeads.com/flutter-delay-widgets/