main.dartFlutter ValueNotifier + ValueListenableBuilder (reactive way to manage state)

//Flutter ValueNotifier + ValueListenableBuilder (reactive way to manage state)
import 'package:flutter/material.dart';

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

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

  @override
  Widget build(BuildContext context) {
    //int progress = 50;
    final ValueNotifier<int> progress = ValueNotifier<int>(50);
    String status = "MY STATUS";
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(body: 
               Column(children:
                      [
                                  
            ValueListenableBuilder<int>(
            valueListenable: progress,
            builder: (context, value, child) {
              return
                   Text('status: ${status}, progress: ${progress.value}');
            }),
                        
            GestureDetector(onTap: () => { progress.value += 1 },
                           child: Text("CLICK"))
                        ]
               )
            ),
    );
  }
}