HTTPS + service worker + web app manifest = progressive web app

  1. Fluid images, and
  2. Media queries.
  1. A service worker, and
  2. A Web App Manifest.
  • Then you can add a service worker,
  • And don’t forget to add a web app manifest file.
  • Served over HTTPS (required for service workers)
  • Has registered a service worker with a fetch event handler
  1. Add a web app manifest.
  2. Add a service worker to your site so that it responds even when there’s no network connection.



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Jeremy Keith

Jeremy Keith


A web developer and author living and working in Brighton, England. Everything I post on Medium is a copy — the originals are on my own website,