# scrollView(_:handle:completion:) Handles a scroll update before the scroll view reacts to it. ``` optional func scrollView(_ scrollView: BEScrollView, handle scrollUpdate: BEScrollViewScrollUpdate, completion: @escaping (Bool) -> Void) ``` ``` optional func scrollView(_ scrollView: BEScrollView, handle scrollUpdate: BEScrollViewScrollUpdate) async -> Bool ``` ## Parameters `scrollView` The [`BEScrollView`](/documentation/BrowserEngineKit/BEScrollView) that receives the scroll update. `scrollUpdate` An object that describes the scroll update. Retrieve all information from this object immediately on the main queue when the system calls your delegate method, as the values may change. `completion` A block to call when you finish processing the scroll update. Pass `true` if you handled the scroll event and the scroll view doesn’t need to react to it; pass `false` otherwise. ## Discussion Your `BEScrollViewDelegate` receives scroll updates before its delegating scroll view handles them. The system calls this method on the main queue — retrieve information from `scrollUpdate` on the main queue, then process the update asynchronously. Call the `completion` block asynchronously on the main queue when you finish processing. > Important: > Call completion blocks on the main queue in the same order in which you receive scroll updates. --- 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)