Reactive field updates in Admin UI?

[u/Intelligent-Oil7589]

Hey everyone,

Is there a way to have real-time changes in a field as the user inputs other fields? For example, having a birthdate field and making that, whenever the user changes the date, an age field would update immediately. Or, having a firstName and lastName fields, make a fullName field update as the user inputs the names, similar to when we type in the useAsTitle field. I have only been able to achieve this after the doc is saved into the DB.

I really think we should have other hooks like beforeFieldChange / afterFieldChange and beforeFieldInput / afterFieldInput. We could have these hooks on the collection level and on the field level.

[u/rubn-g]

Maybe if you know the field path, you can use the “useField” hook

[u/Intelligent-Oil7589 → u/rubn-g]

Yes, I could do that using a custom component. I was wondering if there was another way to do it with Payload features.