[Vuejs]-Service worker not caching https responses

It might well be that the package @ionic/vue is the reason.

If you can, I would suggest to try to implement your PWA with workbox. It is a set of node libraries, therefore you can embed in your Vue app.

In the same article suggested in the comments, I give also an Overview about Workbox.

Some articles related to using Workbox with Vue PWA:

• https://www.blog.plint-sites.nl/adding-workbox-to-a-vue-cli-pwa/
• https://www.telerik.com/blogs/offline-first-vue-apps-with-hoodie-workbox