At registration I need to be able to calculate the age for the age field based on the entry into the previous field which obviously is the Date of Birth.
If the person is under 18 then I need an event to redirect them to another page telling them to come back when they are over 18.
You could just adjust the minimum and maximum year limit for the date field so anyone below 18 can't even register (no year for their birthday). Alternative is you can try using CB Auto Actions with the before registration trigger then substitute the birthdate field to stop registration, but this may not work as it's designed to ignore user cancel to prevent accidental broken registrations. None of this is full proof though of course as all they have to do is input a fake birthdate (nearly everyone underage does this, but it helps you for liability reasons at least).
Kyle (Krileon) Community Builder Team Member Before posting on forums:
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