Why not? The `integrity` attribute accepts more than one value[0].

This would technically be feasible, if my understanding of the service is correct. Hashes could be recorded for each combination of feature -- you could then give those list of hashes to the user to insert into the attribute.

Of course, the main difficulty here would be the management of individual hashes. Hmm, definitely interesting stuff.

[0]: https://developer.mozilla.org/en-US/docs/Web/Security/Subres...

We are talking potentially hundreds of hashes because of how the polyfills service worked.

That depends on how many polyfills are served via each script.

yeah that's nuts, I would never use a random site for that, but in general people's opinion on CDN use is dated. Tons of people still think that cached resources are shared between domains for example.