Bug 283793

Created attachment 473387 [details] iOS Safari showing the bug It would seem like `indexedDB` is undefined when a service worker is running in the background. I found this bug while trying to implement a PWA (in fact, it is one of several other Safari-specific issues: https://developer.apple.com/forums/thread/769794) As a minimal example, consider this push handler: ```js self.addEventListener("push", function (event) { try { var data = event.data.json(); event.waitUntil(Promise.all([ registration.showNotification( data.title, { body: (data.body || "") + typeof self.indexedDB, icon: "", }, ), ])); } catch (e) { console.error("Error processing push event", e); } }, false); ``` The notification body will end with `object` while the PWA is running, and then it'll end with `undefined` when the app isn't in the foreground. As a minimal example reproducing this, I've got a repository: https://github.com/ApelegHQ/webpush-demo/tree/indexedDB-webkit-bug (the branch, 'indexedDB-webkit-bug' is important to see the `indexedDB` issue).