count_controller.dart

import 'package:flutter_riverpod/flutter_riverpod.dart';

import 'count_state.dart';

final countProvider = StateNotifierProvider<CountController, CountState>(
  (ref) => CountController(ref.read),
);

class CountController extends StateNotifier<CountState> {
  CountController(this._read) : super(const CountState());
  final Reader _read;

  void increment() {
    state = state.copyWith(
      count: state.count + 1,
    );
  }
}