When creating or editing an event, I need to validate that the date + time falls within a valid range. The validation requires an API call, so it must be done async.
Everything I see in the documentation regarding the form validation appears to be static.
Ideally I'd like to present the user with a warning if the start and end time they select falls outside of a valid range, but still allow them to create or edit the event.
Any ideas on how to achieve this would be appreciated.