minLength static method

String? Function(String?) minLength(
  1. int min, {
  2. String? message,
})

Implementation

static String? Function(String?) minLength(int min, {String? message}) {
  return (String? value) {
    if (value == null || value.isEmpty) return null;
    if (value.length < min) {
      return message ?? 'Debe tener al menos $min caracteres';
    }
    return null;
  };
}