Verifying WebKit Versions for iOS 16 and iOS 17 Builds and Assessing Commit Impact

Question

I have noticed that some behaviors in WKWebView are different when building with Xcode 15 for iOS 17 compared to iOS 16. I suspect that this difference may be attributed to the commit at Remove iOS-only NSUserDefaults-backed UA override.

However, since this is just my speculation, I would like to confirm the reason. To do so, I want to check the WebKit version when building for iOS 16 and 17 and verify if the changes made in that commit are included in the respective release versions of WebKit.

I attempted debugging using navigator.userAgent, but the values for iOS 16 and 17 appear to be the same, making it challenging to determine what has changed.

Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148

How can I verify the WebKit version used for iOS 16 and iOS 17 builds and determine if the content of a specific commit has influenced that version?

Answer 1

In fact, the safest way is to downgrade the pdfjs-dist version