How to perform Regular Expression Check (JSU) only when field is not empty

Preeti Yadav_7qdi4d

Hello,

I have a custom field called Digit in create screen. Requirement is to check if field is having only 10 digits in it. For that I have used Regular Expression Check (JSU).

But it is also checking the validations when field is empty. I need that when field is empty nothing to be checked and when it has value need to check if its having only 10 digits or not.

Radek Dostál

Isn't the regex extended, in a sense you could do

^([0-9]{10}|)$

Where the | pipe serves as "or". I haven't tested above but I remember I set up a couple of those before.