PWA offline mode not loading from cache on mobile browsers

Question

I wrote a simple PWA (current version) based on this tutorial by Vaadin. It works fine, tested in Chrome, also in offline mode.

By using it on a mobile device, issues oc

Answer 1

The problem was within the service-worker:

I forgot to add the service worker file to the static assets.

Found the solution by reading the answers of this question: https://stackoverflow.com/a/44482764/7350000.