I’ve created a form in OSM with two timestamp input fields:

Started_at
End_at

Need to know how to create conditon or “override block” to check that

end_at must be more than 10 minutes greater than startet_at.

Expected resultat

If end_at is less than 10min. Display a message that says “condition is not valid” so that one can’t be able to submitt the form by Action.