Password Field Validator

Password Field Validator help you to validate a passwords with your rules.

Validations

• Minimum length
• Uppercase count
• Lowercase count
• Numeric characters
• Special characters

Getting started

1. Add it to your package's pubspec.yaml file

dependencies:
  password_field_validator: 0.0.1

2. Install packages

flutter pub get

3. Import package

import 'package:password_field_validator/password_field_validator.dart';

Usage

Now just add it after your TextField and pass the controller

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  final TextEditingController passwordTextController = TextEditingController();

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Container(
          padding: const EdgeInsets.all(25),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              const Text(
                'Enter your password',
              ),
              TextField(
                controller: widget.passwordTextController,
                obscureText: true,
              ),
              Padding(
                padding: const EdgeInsets.all(15),
                child: PasswordFieldValidator(
                  minLength: 8,
                  uppercaseCharCount: 2,
                  lowercaseCharCount: 1,
                  numericCharCount: 3,
                  specialCharCount: 2,
                  defaultColor: Colors.black,
                  successColor: Colors.green,
                  failureColor: Colors.red,
                  controller: widget.passwordTextController,
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

Example

You can find a simple example here