Flutter Password Validator

Flutter Password Validator package helps you to validate sign-in user-entered passwords with your rules.

How to use

1- Depend on it

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

dependencies:
  flutter_pw_validator: <latest>

2- Install it

Install packages from the command line:

flutter pub get

3- Usage

First You have to import the file:

import 'package:flutter_pw_validator/flutter_pw_validator.dart';

And then just put it right under your password TextField and pass the controller to that:

new TextField(
    controller: _passwordController
),
new FlutterPwValidator(
    controller: _passwordController,
    minLength: 6,
    uppercaseCharCount: 2,
    lowercaseCharCount: 2,
    numericCharCount: 3,
    specialCharCount: 1,
    width: 400,
    height: 150,
    onSuccess: yourCallbackFunction,
    onFail: yourCallbackFunction
)

Properties

Property	Description	Default Value	Required
controller	Takes your password TextField controller	null	Yes
minLength	Takes total minimum length of password	null	Yes
uppercaseCharCount	Takes minimum uppercase character count that has to include in the password	0	No
lowercaseCharCount	Takes minimum lowercase character count that has to include in the password	0	No
numericCharCount	Takes minimum numeric character count that has to include in the password	0	No
specialCharCount	Takes minimum special character count that has to include in the password	0	No
width	Takes the widget width	null	Yes
height	Takes the widget height	null	Yes
onSuccess	A void callback function that runs when the password is matched with the condition(s)	null	Yes
onFail	A void callback that gets called everytime the password doesn't match with the condition(s)	null	No
defaultColor	Takes default state color of the widget	Color(0xFFd3d3d3)	No
successColor	Takes success state color of the widget	Color(0xFF2ee292)	No
failureColor	Takes failure state color of the widget	Color(0xFFf9433e)	No
strings	A class implementing the default FlutterPwValidatorStrings	English FlutterPwValidatorStrings	No
key	Key to access the widget state and its functions GlobalKey<FlutterPwValidatorState>()	null	No

i18n

If you want to translate this plugin simply implements the FlutterPwValidatorStrings class and pass it to the widget.

class FrenchStrings implements FlutterPwValidatorStrings {
  @override
  final String atLeast = 'Au moins - caractères';
  @override
  final String uppercaseLetters = '- Lettres majuscules';
  @override
  final String numericCharacters = '- Chiffres';
  @override
  final String specialCharacters = '- Caractères spéciaux';
}

FlutterPwValidator(
    // ...
    // your config above
    strings: FrenchStrings()
)

Example Project

You can use this example project to see how it works.