Easy validator is a package that lets user to implement validation in any of the widget that they create in flutter.

Features

• Validate any widget in Flutter, not just form fields
• Simple integration with existing widgets
• Custom validation logic
• Automatic validation triggers
• Clean error message display

Getting started

• Prerequisites
  • Flutter SDK installed
  • Basic knowledge of Flutter widgets and TextEditingController
• Installation
  • Add this to you pubspec.yaml file dependencies: easy_validator: ^1.0.0

Usage

• Basic Validation Basic validation example:

EasyValidator<String>(
  controller: myController,
  validator: (value) {
    if (value == null || value.isEmpty) {
      return 'This field is required';
    }
    return null;
  },
  child: TextField(
    controller: myController,
    decoration: InputDecoration(labelText: 'Username'),
  ),
)

• Custom Widget Validation Validate any widget by connecting it to a controller:

EasyValidator<int>(
  controller: _sliderController,
  validator: (value) {
    if (value == null || value < 10) {
      return 'Value must be at least 10';
    }
    return null;
  },
  child: Slider(
    value: _currentValue,
    min: 0,
    max: 100,
    onChanged: (value) {
      _sliderController.text = value.toString();
    },
  ),
)

Additional information

This package was created to solve the limitation of Flutter's built-in validation system which primarily works with Form widgets. Easy Validator brings validation capabilities to any widget in your Flutter application.