281092 2024-10-08 14:50:09 -0700 Updates to getClientCapabilities to match latest WebAuthn spec 2025-05-16 16:38:14 -0700 1 1 1 Unclassified WebKit WebKit Misc. Safari Technology Preview Unspecified Unspecified RESOLVED MOVED InRadar P2 Normal --- 1 timcappalli webkit-unassigned agektmr bfulgham garrett_davidson matthew nitinmahendru pascoe webkit-bug-importer wilander oldest_to_newest 2066308 0 timcappalli 2024-10-08 14:50:09 -0700 Couple of updates are needed for getClientCapabilities() to match the current L3 spec[1] A. WebKit supports Related Origin Requests but is not reporting that support (using `relatedOrigins` [2]) in getClientCapabilities(). This is critical for the usability of the related origins feature by RPs. B. The capability for Conditional Mediation (aka autofill UI) was renamed [3] to `conditionalGet`[4] when `conditionalCreate` was added for consistency. [1] https://w3c.github.io/webauthn/#sctn-getClientCapabilities [2] https://w3c.github.io/webauthn/#dom-clientcapability-relatedorigins [3] https://github.com/w3c/webauthn/pull/2061 [4] https://w3c.github.io/webauthn/#dom-clientcapability-conditionalget Here is the output of getClientCapabilities() in Safari Technical Preview 205: {"passkeyPlatformAuthenticator":true,"hybridTransport":true,"conditionalMediation":true,"conditionalCreate":true,"userVerifyingPlatformAuthenticator":true} 2066310 1 webkit-bug-importer 2024-10-08 14:51:21 -0700 <rdar://problem/137539823> 2087870 2 bfulgham 2025-01-16 15:24:48 -0800 The cause of this bug was outside of the WebKit Open Source project. The fix will be shipped to customers in a future update. We will update this bug when we have a public seed that can be tested. 2117800 3 bfulgham 2025-05-16 16:38:14 -0700 The fix for this needed to be made outside of the WebKit Open Source project. That fix shipped in iOS/iPadOS 18.4, and macOS Seqoia 15.4.