Chrome 150 has shipped support for the `focusgroup` HTML attribute, a feature proposed by Open-UI that enables arrow-key navigation within composite ARIA widgets without JavaScript. The author has created a series of no-script CodePen demos covering listbox, menu, menubar, radiogroup, tablist, and toolbar patterns to help developers and accessibility practitioners test the feature before it reaches a formal spec. Early testing revealed several potential bugs, including unexpected Tab focus behavior with `focusgroup="none"`, role exposure issues when combining `focusgroup` with `role="presentation"`, and screen reader quirks in NVDA and JAWS. The author also shares concerns about the explainer leaning on APG patterns, the misuse of menu roles for site navigation, and the risk that developers will inadvertently apply ARIA roles to standard HTML just to get free arrow-key interactions.
