import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: Padding(
            padding: .all(20.0),
            child: PasswordToggleField(),
          ),
        ),
      ),
    );
  }
}

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

  @override
  State<PasswordToggleField> createState() => _PasswordToggleFieldState();
}

class _PasswordToggleFieldState extends State<PasswordToggleField> {
  bool _isObscured = true;

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisSize: .min,
      spacing: 20,
      children: [
        TextField(
          obscureText: _isObscured,
          decoration: const InputDecoration(
            border: OutlineInputBorder(),
            labelText: 'Password',
          ),
        ),
        ElevatedButton(
          onPressed: () {
            // 3. Toggle the state and rebuild the UI
            setState(() {
              _isObscured = !_isObscured;
            });
          },
          child: Text(_isObscured ? 'Show Text' : 'Hide Text'),
        ),
      ],
    );
  }
}