Bug 247315

Summary:	`'Notification' in window` returns false
Product:	WebKit	Reporter:	N <hendrex.jakai>
Component:	DOM	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED WONTFIX
Severity:	Normal	CC:	ap, ashvayka, bedney, beidson, cdumez, rniwa, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari 16
Hardware:	iPhone / iPad
OS:	iOS 16
See Also:	https://bugs.webkit.org/show_bug.cgi?id=264074

Description N 2022-11-01 06:43:30 PDT

Hey
I have iOS 16.2 installed on my iPhone, and I have enabled under Safari's experimental WebKit features:

- Built-in Web Notifications
- Push API
- Permissions API

However, while `'PushManager' in window` returns true, `'Notification' in window` returns false, so I can't use the very basic `Notification.permission` so I can handle the modals and requests properly.

Do you know if it will be the case that Safari won't be supporting such basic and important thing as `Notification.permission` ?

Thank you!

Comment 1 Alexey Proskuryakov 2022-11-01 12:49:57 PDT

Notification.permission is certainly supported, and exposed as window.Notification.permission. CC'ing some folks who would know why the "in window" check fails.

Comment 2 N 2022-11-01 14:54:24 PDT

Thanks Alexey.

I've just tested "window.Notification", and it seems to be "undefined".

I double checked, and I have those same 3 feature flags (listed in my previous comment) enabled.

Comment 3 Brady Eidson 2022-11-03 13:19:45 PDT

No matter what you've done with those experimental feature flags, window.Notification is not supported in Safari on iOS 16.

As for your questions of when Safari will support a particular feature; Safari is a product shipped by Apple, not the WebKit open source project.

So this is not a place where that can be answered.

Comment 4 Alexey Proskuryakov 2022-11-03 13:26:08 PDT

I tested wrong. First, I tested on macOS. Second, I tried `Notification in window` instead of `'Notification' in window`. Embarrassing.

Comment 5 N 2022-11-03 14:30:57 PDT

Thanks Brady.

Could you please indicate where can I report this and get answers about this?

This looks like a significant hole on the implementation of Web Push, as we need to know the value of `Notification.permission` to be able to optimize the user's experience on the website.

(and avoid annoying the user, or provide the user with instructions to unblock the notifications if they are trying to turn these on again, etc)

Comment 6 Radar WebKit Bug Importer 2022-11-08 05:44:19 PST

<rdar://problem/102087326>

Comment 7 Brady Eidson 2023-05-23 15:54:57 PDT

(In reply to N from comment #5)
> Thanks Brady.
> 
> Could you please indicate where can I report this and get answers about this?
> 
> This looks like a significant hole on the implementation of Web Push, as we
> need to know the value of `Notification.permission` to be able to optimize
> the user's experience on the website.
> 
> (and avoid annoying the user, or provide the user with instructions to
> unblock the notifications if they are trying to turn these on again, etc)

Can you use navigator.permissions for that?

There's a code snippet here:
https://webkit.org/blog/14112/badging-for-home-screen-web-apps/

Comment 8 William J. Edney 2024-02-04 11:35:57 PST

In case anyone else happens upon this bug, in Safari for iOS (at least as of iOS 17.3), the Notification object is undefined (i.e. "'Notification' in window" will fail) *unless the page is "installed"* (i.e. it is running as a PWA / has been "Add(ed) To Home Screen").