`html.global_attributes.focusgroup` etc. - missing data

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?

There's no data for the focusgroup HTML attribute and related APIs.

What browsers does this problem apply to, if applicable?

Chromium (Chrome, Edge 79+, Opera, Samsung Browser)

What did you expect to see?

I'd expect the following keys:

• api.HTMLElement.focusgroup
• api.HTMLElement.focusgroupStart
• api.SVGElement.focusgroup
• api.SVGElement.focusgroupStart
• html.global_attributes.focusgroup
• html.global_attributes.focusgroupstart

Did you test this? If so, how?

No, but Chrome Status reports that it shipped in Chrome 150 and the Edge 150 release notes corroborate. @captainbrosset also reported this in

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

• Focusgroup - Chrome Platform Status
• Microsoft Edge 150 web platform release notes (Jul. 2026)

Do you have anything more you want to share?

There's no published specification text, only the pull request https://github.com/whatwg/html/pull/11723. ☹️

MDN URL

No response

MDN metadata

No response

Search the repository for the six requested compatibility keys, then review their surrounding data patterns and the linked Chrome Status and Edge release notes. Add support data for the focusgroup attribute and APIs with the reported Chromium, Chrome 150, and Edge 150 evidence, and verify the dataset checks pass.