Create notifications from service worker so it works on mobile

[Josh-Cena]

Fix #9167. I did not change the other occurrences of new Notification because they look like quick examples.

[github-actions]

Preview URLs

• /en-US/docs/Web/API/Notification/Notification
• /en-US/docs/Web/API/Notifications_API/Using_the_Notifications_API
• /en-US/docs/Web/Progressive_web_apps/Tutorials/js13kGames/App_structure
• /en-US/docs/Web/Progressive_web_apps/Tutorials/js13kGames/Offline_Service_workers
• /en-US/docs/Web/Progressive_web_apps/Tutorials/js13kGames/Re-engageable_Notifications_Push

Flaws (3)

Note! 3 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/API/Notification/Notification
Title: Notification: Notification() constructor
Flaw count: 1

• macros:
  • Macro produces link /en-US/docs/Web/API/Notification/requestPermission which is a redirect

---

URL: /en-US/docs/Web/API/Notifications_API/Using_the_Notifications_API
Title: Using the Notifications API
Flaw count: 2

• unknown:
  • Error serializing baseline for numeric-seperators: missing field description``
  • Error serializing baseline for single-color-gradients: missing field description``

External URLs (1)

URL: /en-US/docs/Web/API/Notification/Notification
Title: Notification: Notification() constructor

• https://crbug.com/481856 (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2025-09-19 23:44:20)

[wbamberg]

These changes look fine but I haven't tested it. I guess the corresponding changes in https://github.com/mdn/pwa-examples/tree/main/js13kpwa need to be made.

[wbamberg]

The spec says that notifications created using the constructor are "non-persistent notifications", and notifications created by ServiceWorkerRegistration.showNotification() are "persistent notifications", and that they have quite different behaviors.

It would be great to talk about this all explicitly in these docs, and that could also cover the use cases for the different types, and why persistent notifications are not so applicable on mobile.

But I suppose that's out of scope for this PR.

[Josh-Cena]

But I suppose that's out of scope for this PR.

Indeed, and we already have #30931

[wbamberg]

But I suppose that's out of scope for this PR.

Indeed, and we already have #30931

Ah, great. I think that extra context will really help it all make sense.