How to determine if current field is required (or rather if the current field fails a certain validation)

[devnull69]

I have the requirement to put an asterisk to a field label whenever this field is required

This doesn't pose any problem if the field is unconditionally required ... but I often have fields coming from dynamic form generation, where the user/form creator can decide to make the field only required if a certain condition is met (eventually depending on other field values, i.e. the field is ONLY required if the other field has a certain value).

Now, the required property doesn't allow to have a dynamic validation, therefore I added a "validate" property with a function returning either a string (if field is required and not filled) or true. Ideally, I would now show the asterisk on the field label, whenever this function will fail on submit

But, as mentioned, the validation is only run on submit, and not dynamically. So I cannot find a way to show the asterisk dynamically depending on the outcome of the (potentially failing) validation.

Is there any way to show the asterisk if the required/validate results change dynamically depending on values of other fields?

[devnull69]

So maybe I can rephrase and shorten my question:

Is there a way to dynamically determine the validation state of a field depending on a condition that might depend on other fields?

[devnull69]

no longer relevant, I had to rephrase my question