# projectedValue A projection of the observed object that provides bindings to its properties. ``` @MainActor @preconcurrency var projectedValue: ObservedObject.Wrapper { get } ``` ## Discussion Use the projected value to get a binding to a value that the delegate publishes. Access the projected value by prefixing the name of the delegate instance with a dollar sign (`$`). For example, you might publish a Boolean value in your extension delegate: ``` class MyExtensionDelegate: NSObject, WKExtensionDelegate, ObservableObject { @Published var isEnabled = false // ... } ``` If you declare the delegate in your [`App`](/documentation/SwiftUI/App) using the [`WKExtensionDelegateAdaptor`](/documentation/SwiftUI/WKExtensionDelegateAdaptor) property wrapper, you can get the delegate that SwiftUI instantiates from the environment and access a binding to its published values from any view in your extension: ``` struct MyView: View { @EnvironmentObject private var extensionDelegate: MyExtensionDelegate var body: some View { Toggle("Enabled", isOn: $extensionDelegate.isEnabled) } } ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)