Add FAQ on display notification from window

[gauntface]

No description provided.

[FluorescentHallucinogen]

@gauntface

Could you please add that new Notification(title, options) is not (and, seems, never was) supported by Chrome for Android? See https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/BygptYClroM.

If I use Firebase Cloud Messaging and want to display received messages, handled through the onMessage callback in index.html, not the setBackgroundMessageHandler callback in firebase-messaging-sw.js, as standard browser notifications in Chrome for Android, what code should I use instead of the following one?

messaging.onMessage((payload) => {
  new Notification(payload.notification.title, payload.notification);
});

[FluorescentHallucinogen]

@gauntface PTAL.