# replace(with:value:) Replaces an attribute with a different attribute. ``` @preconcurrency mutating func replace(with key: U.Type, value: U.Value) where U : AttributedStringKey, U.Value : Sendable ``` ## Parameters `key` The key of the new attribute. `value` The value of the new attribute. --- 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)