why my stateless widget can increase the value ?I'm using getx state management

Question

When i study they said stateless widget can change value in short static value only display, but when i try to use getx in stateless it can change the value dynamic getx.dart file and testingGetX.dart

`import 'package:get/get.dart';

class GetX{
RxInt number = 0.obs;
void increase() {
number = number + 1;
}
}`


`import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:get_api_2/getX.dart';

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

@override
Widget build(BuildContext context) {
final authProvider c = Get.put(authProvider());
return Scaffold(
appBar: AppBar(),
body:Column(
  children: 
  [
    Text("value : ${c.number}"),

    Obx(()=>Text("value : ${c.number}")),
    TextButton(onPressed: () {
      c.number = c.number+1;
    }, child: Text("increase"))
  ]
),
);
}
}`

Answer 1

It is not your stateless widget that is changing the state, it is the getX observer that is doing it. The state of the parent widget is always the same, only what is inside obx() is rebuilt

Answer 2

The Obx widget in your widget tree already contains an observer that listens to the value that has been marked with "obs, then it can listen to and react to changes with the value attached to it. Think of it like its own self-proclaimed "setState", that is why it's able to change its value.