Always required

[Paroca72]

It seems the field is always required

final ValidationBuilder validationBuilder = ValidationBuilder().email('Wrong Email Format');
String? _errorText = validationBuilder.build()(null);

Result "The field is required"

final ValidationBuilder validationBuilder = ValidationBuilder().email('Wrong Email Format');
String? _errorText = validationBuilder.build()('');

Result "Wrong Email Format"

[themisir]

You can set optional parameter when constructing ValidationBuilder to set value as optional (not-required). In that case if null or empty string value is provided the validation will be passed.