workavia-mail-front/docs/adr/0042-fix-error-no-active-serivce-worker-in-firebase-when-get-token-on-web.md

42. Fix error Failed to execute 'subscribe' on 'PushManager': Subscription failed - no active Service Worker when get token on web

Date: 2024-04-02

Status

• Issues:
  • https://github.com/firebase/firebase-js-sdk/issues/7575
  • https://github.com/firebase/firebase-js-sdk/issues/7693

Context

• Sometimes calling messaging FirebaseMessaging.onMessage.getToken() returns the error Failed to execute 'subscribe' on 'PushManager': Subscription failed - no active Service Worker.
• It seems to occur on the first page load and clear storage with unregister service worker, when the user refreshes the notifications work and there's no error anymore.

Decision

• There is currently no official solution from the Firebase team.
• So we will use the following workaround:
  • If FirebaseMessaging.onMessage.getToken() throw DomException then call again get token.
  • Try again 3 times with FirebaseMessaging.onMessage.getToken()

Consequences

• We got the token right after trying again.
• Receiving new messages on foreground and background works fine.