i use @Observable @Observable class TextClass { var text: String = "" } @State struct ContentView: View { @State var text: TextClass = .init() var body: some View { Form { Text(text.text) Button("upup") { text.text += "1" } } Form { ChildView(text: text) } } } struct ChildView: View { @State var text: TextClass var body: some View { Text (text.text) Button("upup Child") { text.text += "2" } } } @Binding struct ContentView: View { @State var text: TextClass = .init() var body: some View { Form { Text(text.text) Button("upup") { text.text += "1" } } Form { ChildView(text: $text) } } } struct ChildView: View { @Binding var text: TextClass var body: some View { Text (text.text) Button("upup Child") { text.text += "2" } } } @Bindable struct ContentView: View { @State var text: TextClass = .init() var body: some View { Form { Text(text.text) Button("upup") { text.text += "1" } } Form { ChildView(text: text) } } } struct ChildView: View { @Bindable var text: TextClass var body: some View { Text (text.text) Button("upup Child") { text.text += "2" } } } What are the differences between @State, @Binding, and @Bindable, all of which function similarly for bidirectional binding? Which one should I use? I'm curious about the differences between the three.