SwiftUI - How to hide window title on macOS

Question

On macOS with new SwiftUI framework without AppDelegate / SceneDelegate, how do I hide the window title?

I found this article from Apple that describes how to do it for a Catalyst app but without that delegate now, how do I achieve this?

user_12299030 · Answer

You need to use the following window style:

WindowGroup {
    ContentView()
}
.windowStyle(HiddenTitleBarWindowStyle())

user_1291945 · Answer

Now it's:

WindowGroup {
  ContentView()
}
.windowStyle(.hiddenTitleBar)