`html.elements.a.attributionDestination` - Missing keys for private click measurement

What type of issue is this?

Incorrect support data (example: BrowserX says "86" but support was added in "40")

What information was incorrect, unhelpful, or incomplete?

Private click measurement data is incomplete; two keys I'd expect to exist are missing.

What browsers does this problem apply to, if applicable?

No response

What did you expect to see?

I'd expect to see keys for:

• html.elements.a.attributiondestination
• api.HTMLAnchorElement.attributionDestination

with support shown in Safari.

Did you test this? If so, how?

I didn't test it properly (it's a rather complex API), but "attributionDestination" in HTMLAnchorElement.prototype returns true in the current version of Safari. That said, I'd expect the data to be equivalent to the already-recorded attributionsourceid attribute.

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

• https://webkit.org/blog/11529/introducing-private-click-measurement-pcm/
• https://privacycg.github.io/private-click-measurement

Do you have anything more you want to share?

Discovered while reviewing https://github.com/web-platform-dx/web-features/pull/2467.

MDN URL

No response

MDN metadata

No response

Start with the html.elements.a.attributiondestination and api.HTMLAnchorElement.attributionDestination entries named in the issue, comparing them with the existing attributionsourceid data. Check the linked Private Click Measurement specification and WebKit release notes, then confirm both keys report Safari support consistently.