Support Offline Mode in Applications

[swernerx]

Nowadays with ServiceWorker and AppCache in place, we should offer some support for these technologies in Edge.

There are effectively too useful options right now in Webpack.

• Workbox by Google (ServiceWorker only): https://developers.google.com/web/ilt/pwa/lab-workbox#62_configure_webpack and https://workboxjs.org/get-started/webpack.html
• Webpack Offline Plugin (ServiceWorker + AppCache): https://github.com/NekR/offline-plugin

[artisin]

NekR/offline-plugin is the way to go. I'm still spelunking through this code base, but it should be a relatively "easy" integration.