I'm creating a web component used to select the name of a Belgian city. Basically, it's a simple input and when some text is entered in it, it display the list.
However, it must be possible to type the name of a city outside of Belgium. The issue is that, for internal reason, we don't and can't have a list of all city in the world, we only have the Belgian ones.
So basically, I want the ensure to be force to select a city if it's in Belgium but be free to type a city name if it's outside of it.