Use Fetch in Firestore v8

[maucaro]

I see that the Firestore v9 SDK was changed to use fetch instead of XHR per this.

Can the same be done for v8? I'd like to use Firestore in the context of a Service Worker. I was able to get this working using v9 but unfortunately the browser support for ES modules in service workers is still limited (Chrome and Edge since 91; Safari since 15; Firefox none; see this).

[hsubox76]

Unfortunately we are not updating v8 with the rare exception of major security issues.

I think even in v9 you should be able to use the "compat" bundles from the CDN to work around this, e.g.

https://www.gstatic.com/firebasejs/9.3.0/firebase-app-compat.js
https://www.gstatic.com/firebasejs/9.3.0/firebase-firestore-compat.js

These should be in UMD format. That might be a possible solution?

[maucaro]

Thank you @hsubox76 ; I will give this suggested approach a try.