HTML Can Do That collects native popover, invoker commands and hidden until-found, and its author adds warnings that several implementations fail accessibility

Sources: chrisburnell.com page, HN discussion
Summary: The page is a live demonstration with the markup shown for each feature: popover and popovertarget for light dismiss and Esc handling without z-index management, a shared name attribute turning details elements into an exclusive accordion, command and commandfor invokers, hidden="until-found", and datalist. The 2026-08-20 update adds warnings that form-control implementations vary widely between browsers, that datalist and hidden="until-found" have real accessibility gaps, and that only six invoker commands have landed stable.
Why it matters: The added warnings turn a feature list into a usable one, because the accessibility gaps decide which of these can replace a scripted component today.