Propagate the .NET [RegularExpression] validation to the client
[RegularExpression] should join [Required], [MaxLength], [StringLength] as a DataAnnotations validation attribute automatically propagated to the Breeze client through metadata. It's powerful. It should be relatively easy as it is string-based and regular expression specifications are (almost) the same in .NET and JS. See also this StackOverflow question
Quick update on this request:
We’re looking at being able to mark this as complete within the next couple of releases.