deny some values to be filtering

Hello, yes it concerns input-form-values. To clarify more, I'm looking for a possibility to deny the empty filter value ('') in frontend (for a text field), because this empty filter value list all items (that I don't want), is it possible ?

Hello

you can try to do this:

There are parameters to limit the number of items until filtering form is submitted
so you can try to limit it to zero

Thank you !
The solution is simplier as what I thought !...