# constant(_:) Creates a binding with an immutable value. ``` static func constant(_ value: Value) -> Binding ``` ## Parameters `value` An immutable value. ## Discussion Use this method to create a binding to a value that cannot change. This can be useful when using a [`PreviewProvider`](/documentation/SwiftUI/PreviewProvider) to see how a view represents different values. ``` // Example of binding to an immutable value. PlayButton(isPlaying: Binding.constant(true)) ``` --- 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)