Overview
Form Builder Validators is a Flutter package that provides a comprehensive set of pre-built validators for use with FormBuilder, simplifying form validation in Flutter applications. It includes common validation rules such as required fields, email format, length constraints, and more. Developers can also extend the library to create custom validators. Designed for seamless integration with FormBuilder, it supports cross-platform apps on Android, iOS, Web, macOS, Windows, and Linux. The package enhances developer productivity by reducing boilerplate code and ensuring consistent validation logic across forms.
Use cases
- Validating user input in registration forms
- Ensuring correct email and phone number formats
- Implementing dynamic form validation rules
- Creating reusable validation logic across multiple forms
- Enforcing minimum and maximum length constraints
Key features
- Pre-built validators for common use cases
- Support for custom validator creation
- Seamless integration with FormBuilder
- Cross-platform compatibility
- Easy-to-use API with clear error messages
- Extensible architecture for advanced validation
Suitable for
- Flutter developers building complex forms
- Teams needing consistent validation across apps
- Projects requiring dynamic or conditional validation
- Developers using FormBuilder for form management
- Apps with strict data entry requirements
Considerations
- Requires FormBuilder to be used
- Limited to validation logic—no UI components
- Custom validators require understanding of Dart closures
- May need additional setup for non-default validation scenarios
- Not suitable for simple, one-off form checks without FormBuilder