Allow bool expanded

main.dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    final notifier = ValueNotifier<bool>(true);
    var value = true;
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: Column(
            mainAxisSize: .min,
            spacing: 16,
            children: [MyWidget(expanded: notifier)],
          ),
        ),
        floatingActionButton: FloatingActionButton.extended(
          label: Text('Expand'),
          onPressed: () {
            notifier.value = true;
            value = true;
          },
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  const MyWidget({super.key, required this.expanded});

  final ValueNotifier<bool> expanded;

  @override
  Widget build(BuildContext context) {
    return InkWell(
      onTap: () {
        expanded.value = !expanded.value;
      },
      child: ValueListenableBuilder(
        valueListenable: expanded,
        builder: (context, value, child) {
          return AnimatedContainer(
            duration: Durations.short1,
            height: expanded.value ? 100 : 10,
            width: 100,
            color: Colors.red,
          );
        },
      ),
    );
  }
}