Using the latest f7 single page react template, when there is an error in the code the service worker goes into an infinite loop loading hot-update.json and hot-update.js. This will continue until the browser crashes.
To simulate this I made a simple Test.js component with a single button and referenced an undefined f7 import on a button’s click event.
Only way to get back to good state is to kill the tab, restart and unregister the service worker.