SwiftUI @Binding update doesn't refresh view

Question

I feel like I\'m missing something very basic, but this example SwiftUI code will not modify the view (despite the Binding updating) when the button is clicked

Tutorials

Answer 1

In the top Level of SwiftUI, @Binding cannot refresh View hierarchy unless manually adding a @state or other refreshing triggers.

struct ContentView: View {
    @Binding var isSelected : Bool
    @State var hiddenTrigger = false

    var body: some View {
        VStack {
            Text("\(hiddenTrigger ? "" : "")")
            Button(action: {
                self.isSelected.toggle()
                self.hiddenTrigger = self.isSelected
            }) {
                Text(self.isSelected? "Selected" : "not Selected")
            }
        }
    }
}

struct ContentView_Previews: PreviewProvider {
            
    static var selected: Bool = false
            
    static var previews: some View {
        ContentView(isSelected: Binding(get: {selected}, set: { newValue in
        selected = newValue}))
    }
}