RegEx Validation for non-mandatory Field

[Malte Kottich]

Hi, this RegEx Valdiation works perfect for mandatory fields:
https://confluence.atlassian.com/jirakb/using-forms-regex-validation-1255454685.html

Can I also validate entries in a non-mandatory field, so also an empty field is allowed? So the regEx would work OR an empty field.

[John Funk]

Hi Malte,

In an Advanced Form, I would say yes. Mostly give it a try and see!