I try to create PWA via create-react-app.
React: 16.8.4
React-Scripts: 2.1.8
Chrome: 72.0.3626.121
The minimum setup to reproduce this is:
Edit src/index.jsand change serviceWorker.unRegister() to serviceWorker.register().
Create a production build and serve the app
npm run build && serve -s build
Browse to http://localhost:5000 and see my app.
When I enter offline mode (stop the server or select offline in the Network tab) and hit reload, the browser loads the app, obviously via the service worker.
When I open Chrome dev tools and hit reload while being offline, the browser shows me ERR_INTERNET_DISCONNECTED, the service worker is not doing anything in debug mode.
In Firefox, the app works offline both normal and in the Firefox debugger.
What can I do to debug a service worker in Chrome?
Turns out that I had checked Bypass for Network in the Application tab. In that case any request goes directly to the network which renders the service worker useless.