Earlier quoted context omitted.
Yes. You can see this among other planned use cases for the web packaging spec here https://wicg.github.io/webpackage/draft-yasskin-webpackage-u...
I'm not quite following which parts were or weren't needed for what's been enabled in the post here, for the usecase of delivering a single offline package that can be opened like a website, is there something that works yet? Or a repo I should be following other than the spec? Once I can create webpackages and deliver them to clients a lot of thing I want to do become hugely easier and nicer.
I know it's not exactly easy to follow but the only implementation repo I can think of to follow right now is the Chromium repo.