Whether the validator treated the format keyword as an assertion rather
than an annotation. Validators often only validate format if they're
configured to. If this isn't given, messages that describe format say
that it only applies if formats are validated.
Optionallocale
locale?:string
A locale identifier in the form of "{language}-{region}".
Whether the validator treated the
formatkeyword as an assertion rather than an annotation. Validators often only validateformatif they're configured to. If this isn't given, messages that describeformatsay that it only applies if formats are validated.