FormRules is a fluent, chainable Flutter form validation package offering a conflict-free static API with built-in validation rules, full localization support, and no external dependencies. It enables developers to create robust, readable validation logic through method chaining, simplifying form input checks across platforms. Ideal for apps requiring dynamic, localized form validation with minimal setup and maximum flexibility.
Use cases
- Validating user input in login forms
- Implementing dynamic form fields with real-time feedback
- Supporting multi-language form validation
- Building complex nested form structures
- Creating reusable validation rules across multiple screens
- Ensuring data integrity in mobile and web applications
Key features
- Fluent, chainable API for clean validation code
- Built-in validation rules (e.g., required, email, length)
- Full localization support for internationalized apps
- Zero third-party dependencies
- Conflict-free static API design
- Cross-platform compatibility (Android, iOS, Web, macOS, Windows, Linux)
Suitable for
- Developers building cross-platform Flutter apps
- Teams needing maintainable form validation logic
- Projects requiring multilingual form support
- Apps with complex or dynamic form workflows
- Frontend developers seeking lightweight validation solutions
Considerations
- May require additional setup for custom validation logic
- Limited to built-in rules unless extended via custom functions
- Localization requires proper locale configuration
- Not designed for server-side validation
- Best suited for client-side form validation only
- No built-in UI components—works with any form widget