Content-first server content enhanced by service worker

[nhoizey]

Following example of https://www.ampproject.org/latest/blog/the-shadow-reader-improved/

• HTML served by server only contains:
  • base HTML & CSS for blank layout (space for header & footer)
  • main content of page (including WebMentions for SEO?)
  • async registration of Service Worker
• Service Worker install event:
  • downloads full site shell (header & footer) and features (search)
• Service Worker fetch event on pages:
  • adds shell to HTML sent by server
• page specific async JS loads:
  • additional content (WebMentions?)

[nhoizey]

Enhancement over #43

[nhoizey]

Requires #102 ?