I just want vendors to build some of those into the browser. At least modals. I’m currently using the silly trick of invisible keyboard traps (listening for event parent doesn’t seem to always work when shift-tabbing) coupled with aria-hidden on the rest of the website, which will fail the moment I get a modal that for whatever reason cannot sit outside the main page element.
We have Javascript and chrome alerts already. Built-in, with focus control and names. Gimme.