I guess you may call it “conditional binding”. I don’t know how else to call it.

I want to change the title text, when either I type in the textfield or tap the button. However I don’t want to change the TextField text when I tap the button, just want to change the title text. This is the demo code

class Hobbit: ObservableObject {
    @Published var firstName: String
    
    init(name: String = "Bilbo") {
        self.firstName = name
    }
}

struct HobbitView: View {
    @StateObject private var hobbit = Hobbit()
    
    var body: some View {
        
        //"Place Holder" should not be modified by tapping the button
        TextField("Place Holder", text: $hobbit.firstName)
            .padding(.bottom)
        
        //Should be modifiable by TextField or Button
        Text("The name is (hobbit.firstName).")
            .font(.title)

         //Should only modify the Text, not the TextField text
        Button("Set a Name") {
            hobbit.firstName = "Sam"
        }
    }
}

I’m new to SwiftUI and I think I’m missing some key knowledge on how SwiftUI bindings work.