Forms in Flutter - Code #4

main.dart

import 'package:validate/validate.dart'; // Add import for validate package.

class _LoginPageState extends State<LoginPage> {
  // Add validate email function.
  String _validateEmail(String value) {
    if (!Validate.isEmail(value)) {
      return 'The E-mail Address must be a valid email address.';
    }

    return null;
  }

  // Add validate password function.
  String _validatePassword(String value) {
    if (value.length < 8) {
      return 'The Password must be at least 8 characters.';
    }
    
    return null;
  }
}