minLength static method

String? Function(String?) minLength(
  1. int min, [
  2. String? message
])

Returns a validator that checks whether a field has a minimum length.

Implementation

static String? Function(String?) minLength(int min, [String? message]) {
  return (value) {
    if (value == null || value.length < min) {
      return message ?? 'Minimum $min characters required';
    }
    return null;
  };
}