Persona doesn't work well in non-JS, non-browser contexts, yet. So are there built-in, HTML-only versions for this in the works? It seems it should be possible

Persona doesn't work well in non-JS, non-browser contexts, yet. So are there built-in, HTML-only versions for this in the works? It seems it should be possible to build some of this functionality into the browser, making it work without JS. The nice thing is that you can use it for progressive enhancement. Users have JS? Auth with Persona. Users don't have JS? Use a traditional email address / password system. I wouldn't call that progressive enhancement. Depending on whether the client has JS enabled, they would go through entirely different registration and auithentication processes, using different credentials. That can be very confusing to the users.