Use case

I add certain fields in firestore in particular format. I want my text field to search if data already exists, if not then add to my firestore collection. DropDownMenu already has searchable filterable feature, it is just that I cannot add new user input values in certain format automatically.

I have tried creating my own searchable dropdown below textfield using other widgets including Stack, and cannot tap my entries in custom created dropdown to select them.

Thanks

Proposal

Feature requested is inputFormatters as below like TextFormField already has it -

DropDownMenu(
inputFormatters: [..]
dropdownMenuEntries: //....
)