fast_validator 0.1.1

A flutter package to validate text fields, date fields or any data fastly. Includes built in commonly used validators. You can also add custom validators for your needs.

example/lib/main.dart

// import 'package:flutter/material.dart';
//
// void main() {
//   runApp(const MyApp());
// }
//
// class MyApp extends StatefulWidget {
//   const MyApp({super.key});
//
//   @override
//   State<MyApp> createState() => _MyAppState();
// }
//
// class _MyAppState extends State<MyApp> {
//   late TextEditingController textController;
//   String? error;
//
//   @override
//   void initState() {
//     textController = TextEditingController();
//     super.initState();
//   }
//
//   @override
//   void dispose() {
//     textController.dispose();
//     super.dispose();
//   }
//
//   @override
//   Widget build(BuildContext context) {
//     return MaterialApp(
//       home: Scaffold(
//         body: Center(
//           child: Column(
//             mainAxisAlignment: MainAxisAlignment.center,
//             crossAxisAlignment: CrossAxisAlignment.start,
//             children: [
//               const Text('User email *'),
//               SizedBox(
//                 width: 200,
//                 height: 40,
//                 child: TextField(
//                   controller: textController,
//                   decoration: const InputDecoration(
//                     contentPadding: EdgeInsets.symmetric(horizontal: 6, vertical: 0),
//                     border: OutlineInputBorder(borderSide: BorderSide(width: 3, color: Colors.green)),
//                   ),
//                 ),
//               ),
//               Text(error ?? '', style: const TextStyle(color: Colors.red)),
//             ],
//           ),
//         ),
//         floatingActionButton: FloatingActionButton(onPressed: _validate, child: const Text('Validate')),
//       ),
//     );
//   }
//
//   void _validate() {
//     /// Reset the error
//     setState(() => error = null);
//
//     String text = textController.text.trim();
//
//     ValidationResult result = FastValidator.validate(text,
//         fieldName: 'Email',
//         validators: [FastRequiredValidation(), FastEmailValidation(customMessage: 'Invalid email')]);
//
//     debugPrint('Result: ${result.result}');
//     debugPrint('Valid: ${result.valid}');
//     debugPrint('Type: ${result.type}');
//     debugPrint('ErrorMsg: ${result.errorMessage}');
//
//     if (!result.valid) setState(() => error = result.errorMessage);
//   }
// }