# projectedValue A projection of the observed object that creates bindings to its properties. ``` @MainActor @preconcurrency var projectedValue: ObservedObject.Wrapper { get } ``` ## Discussion Use the projected value to get a [`Binding`](/documentation/SwiftUI/Binding) to a property of an observed object. To access the projected value, prefix the property variable with a dollar sign (`$`). For example, you can get a binding to a model’s `isEnabled` Boolean so that a [`Toggle`](/documentation/SwiftUI/Toggle) can control its value: ``` struct MySubView: View { @ObservedObject var model: DataModel var body: some View { Toggle("Enabled", isOn: $model.isEnabled) } } ``` > Important: A `Binding` created by the projected value must only be > read from, or written to by the main actor. Failing to do so may result > in undefined behavior, or data loss. When this occurs, SwiftUI will > issue a runtime warning. In a future release, a crash will occur > instead. --- 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)