Bug 242687

Summary: REGRESSION (Safari 16 beta, STP): WebArchive can't be loaded
Product: WebKit Reporter: crispygoti
Component: New BugsAssignee: Matthew Finkel <m_finkel>
Status: RESOLVED FIXED    
Severity: Normal CC: webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari Technology Preview   
Hardware: All   
OS: macOS 12   
Attachments:
Description Flags
Webarchive of www.angular.io none

Description crispygoti 2022-07-13 04:44:09 PDT 
Created attachment 460855 [details]
Webarchive of www.angular.io

Since iOS 16 Beta / Safari 16 opening WebArchives doesn't work correctly anymore. It looks like no JavaScript is executed anymore (or just script tags in the body tag?). This breaks all Angular based applications. 
This can be verified by opening Safari Technology Preview and by saving the official Angular website (https://angular.io) as a webarchive - after that just open the webarchive again. 
You'll notice that the website shows a few broken HTML elements - the application itself is completely broken. The same WebArchive works perfectly fine in the latest stable Safari (15.5). 

Our iOS app makes heavy use of WebArchives to improve performance of web content inside the app which is used by millions of users every day. I hope we can get this sorted out before the official iOS 16 Release.

An example webarchive is added as an attachment. It opens fine on Safari 15.5, doesn't work on Safari Technology Preview.
Comment 1 Radar WebKit Bug Importer 2022-07-13 13:33:35 PDT 
<rdar://problem/96970629>
Comment 2 Matthew Finkel 2022-09-13 07:41:32 PDT 
Pull request: https://github.com/webkit/WebKit/pull/4311
Comment 3 Matthew Finkel 2022-11-01 09:59:13 PDT 
Problem resolved by reverting the original change.
Comment 4 crispygoti 2022-11-03 01:18:49 PDT 
In what Safari version will this be fixed then?