Re: [manifest] Allow developers to detect when the user has added the site to their home screen (or equivalent) (#417)

Using `start_url` or `matchMedia` only gives information about usage of added to homescreen web apps, not about how often they are added. Users might add web apps but never actually use them or the other way around.

Regarding the initial proposal, we could have an `install` event which could be fired whenever the app is installed. Not entirely a big fan of this but we kind of opened the door for this when adding `beforeinstallprompt`.

---
Reply to this email directly or view it on GitHub:
https://github.com/w3c/manifest/issues/417#issuecomment-165111872