277588 2024-08-03 03:11:05 -0700 iOS Web Extension service worker fails to load unless I delay all JS via setTimeout 2025-05-16 16:42:32 -0700 1 1 1 Unclassified WebKit Service Workers Safari 17 iPhone / iPad iOS 17 RESOLVED DUPLICATE 274331 InRadar P2 Critical --- 1 bugs webkit-unassigned bfulgham timothy webkit-bug-importer youennf oldest_to_newest 2050477 0 bugs 2024-08-03 03:11:05 -0700 In the latest version of Refined GitHub on the App Store, currently v24.7.10, the service worker fails to load: https://apps.apple.com/us/app/refined-github/id1519867270 - This only happens on iOS, including the simulator - There are no syntax errors or uncaught errors in the code - The same file works when loaded via `background.scripts` instead of `background.service_worker` - It's impossible to debug because the "Service worker" does not appear in Safari's Develop -> MyDevice list - It seems to occasionally run on my iPhone, e.g. it responds to action.onClicked, but rarely, and it never responds to runtime.sendMessage. Most importantly: - The same file works if I wrap the entire background.js contents in `setTimeout(() => {/*contents*/}, 1000)` Versions: - iOS 17.5 and 17.6 iPhone 15 Pro Max Simulator Questions: - If you'd like me to attach a repro, would .xcarchive be enough? - How can I debug service worker failures on iOS? It seems impossible because "Automatically Show Web Inspector for JSContexts" does not work for other devices Repro: - GitHub repo with the extension: https://github.com/refined-github/refined-github/tree/24.7.10 - It needs Node 21+, `npm install && npm run build`. The Xcode project is in /safari References: - https://github.com/refined-github/refined-github/issues/7590 - https://github.com/refined-github/refined-github/issues/7629 Workarounds: - I'll have to ship `background.scripts` until this is resolved 2051871 1 webkit-bug-importer 2024-08-10 03:12:27 -0700 <rdar://problem/133593437> 2055151 2 bugs 2024-08-24 13:17:51 -0700 Some updates: - It has been working recently, maybe thanks to iOS 17.6.1. I have not checked the Simulator though - Version 24.8.20 has been released on the App Store and it was reverted to a background script anyway If you need a build of the service worker version let me know. Overall I wish there was *any* way to debug these issues. I don't know if the service worker can be debugged at all in extensions, if it fails on launch. 2117805 3 bfulgham 2025-05-16 16:41:45 -0700 This was actually resolved in: <rdar://126825362> 2117806 4 bfulgham 2025-05-16 16:42:32 -0700 *** This bug has been marked as a duplicate of bug 274331 ***