UXB - Complex client-side validation

[tSpratt]

We have commissioned a client-facing portal which is being built using the UX Builder and we require more complex client-side validation than is currently possible. For example, if the user were to enter a policy inception date (PID), a policy expiry date (PED), a claim event date (CED) and an insured date of birth (IDB) then we would want to validate that the IDB was prior to the PID, that the PID was prior to the CED, that the CED was prior to the PED. We would also want to check that the IDB did not make the insured person impossibly old or too young to have a policy.

These dates are just one example of client-side validation that exceeds simple data typing - we would like to see configurable complex validation rules in the UXB, some of which will depend on mixed data types (e.g. if _this_ dropdown have value "A" then _this_ amount must not be zero).