APEX 19.1
Currently I have a Dynamic Action on Change of P72_ITEM1, to set the value of P72_ITEM2.
Client condition is "Item is NULL" with P72_ITEM2 set as the item. Works fine.
It has been suggested that the Set Item for P72_ITEM2 should only happen if the change of P72_ITEM1 was to change it to a not null value.
I suspect that I just want to change the Client condition to a Javascript expression. But I'm not sure what that expression should be. Being more familiar with SQL and PL/SQL, I could probably make it a Server condition, but I think a Client Condition would be better.