How to add bar items to a navigation view

The navigationBarItems() modifier lets us add bar button items to the leading and trailing edge of a navigation view. These might be a tappable button, but there are no restrictions – you can add any sort of view.

For example, this adds a Help button the to trailing edge of a navigation view:

var body: some View {
    NavigationView {
        Text("SwiftUI")
            .navigationBarTitle(Text("Welcome"))
            .navigationBarItems(trailing:
                Button(action: {
                    print("Help tapped!")
                }) {
                    Text("Help")
                })
    }
}