Instant Loading Web Apps With An Application Shell Architecture | Web Updates - Google Developers
Outlining the architectural thinking required to create what the Google devrel folks are calling progressive apps.
Browsers without service worker support should always be served a fall-back experience. In our demo, we fall back to basic static server-side rendering…
…but this is only one of many options.
Hmmm. In my opinion, sending usable HTML on first request isn’t an implementation detail—it’s crucial. But on the whole, this approach is very sensible indeed.