Which specific features do you need to detect?

Core features that we want to detect are followings:

• resident key support
• supported client extensions
• attestation conveyance
• require user verification

As @akshayku mentioned, for RP perspective, we need to get such information for making concrete use cases.

@akshayku and I have been discussing this on our side as well. We've been thinking of something along the lines of the following, accounting for the items mentioned above as well as some additional ones:

interface supportedCapabilities {
readonly attribute boolean areU2FDevicesSupported;
readonly attribute boolean areCTAPDevicesSupported;
readonly attribute boolean areResidentKeysSupported;
readonly attribute boolean isUserVerificationSupported;
readonly attribute boolean isTokenBindingSupported;
readonly attribute sequence transportsSupported;
readonly attribute sequence extensionsSupported;
};

partial interface PublicKeyCredential {
static Promise getSupportedCapabilities();
}

Will open a PR as well.

Removed pr-open label since #1219 was closed.

closing this since we closed the PR