As indicated here:
We will be using Google Workbox for the PWA support.
You can already use Workbox manually in Wappler. We will just automate things later on.
So if you try it out, see what it does, learn more about PWA by using it, and you can provide us feedback for more closer integration in Wappler.
Workbox has a nice wizard that you can run and get everything generated:
and use it:
You can do all this in the terminal of Wappler. Just start it and enter the commands of Workbox as stated in the docs above.