Are there any alternatives to using the SDK on the frontend?

[colinhunt]

I currently have a legacy implementation on the backend for using Firebase for web push notifications. It uses the old legacy FCM API, and Google IID service. These are deprecated now and I'm planning to migrate my project away from using them.

However, the migration guides and documentation now state that using the Firebase SDK in the client (browser) is required. Currently, I am not using it. The client is simply subscribing for push notifications in a generic way, using the Web Push Protocol. It then sends the subscription info from that to the backend which uses IID to register it. Only the backend knows about Firebase.

I prefer this approach and would like to preserve it. It allows front to be agnostic as to what backend service is being used, and it reduces dependency bloat, bundle size, etc.

So I'm asking if there is any way to accomplish this migration without radically changing what I'm doing on front. Thank you!