# Publishers.BufferingStrategy A strategy that handles exhaustion of a buffer’s capacity. ``` enum BufferingStrategy where Failure : Error ``` ## Topics ### Buffering strategies [`case dropNewest`](/documentation/Combine/Publishers/BufferingStrategy/dropNewest) When the buffer is full, discard the newly received element. [`case dropOldest`](/documentation/Combine/Publishers/BufferingStrategy/dropOldest) When the buffer is full, discard the oldest element in the buffer. [`case customError(() -> Failure)`](/documentation/Combine/Publishers/BufferingStrategy/customError(_:)) When the buffer is full, execute the closure to provide a custom error. --- 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)