The password_criteria package enhances form input usability by visually indicating when a password meets specific security criteria. As users type, each criterion—such as minimum length or inclusion of special characters—is dynamically highlighted in black once satisfied. This real-time feedback improves user experience by making password strength requirements clear and intuitive. The package is designed for Flutter applications focused on secure form inputs, particularly login or registration screens. It integrates seamlessly with existing text fields and requires no complex setup. The source code is publicly available on GitHub for transparency and customization.
Use cases
- Enhancing password strength feedback in registration forms
- Improving UX in authentication flows
- Providing visual cues for security requirements
- Integrating dynamic validation in login screens
- Supporting accessibility through clear visual indicators
- Simplifying form validation in Flutter apps
Key features
- Real-time criterion validation
- Visual feedback with color changes
- Simple integration with TextField
- Customizable criteria rules
- Lightweight and minimal dependencies
- Open-source with public repository
Suitable for
- Flutter developers building secure forms
- UX-focused application designers
- Apps requiring strong password policies
- Educational tools demonstrating password rules
- Projects prioritizing intuitive form interactions
Considerations
- Does not enforce password policy—only visual feedback
- Requires manual implementation of actual validation logic
- Limited to visual indication; no built-in error handling
- No platform-specific optimizations mentioned
- May need additional styling for consistency with app theme
