To expand, this API is directly inspired by the service worker API. A service worker can be thought of as kind of a reverse proxy (logically speaking) that is r

To expand, this API is directly inspired by the service worker API. A service worker can be thought of as kind of a reverse proxy (logically speaking) that is right in the browser. People are doing very cool things with it. It's a great API for PWAs, SPAs and the like but it also has quite a bit of utility for traditional sites. However there is one big caveat - it's super easy to mess things up with it and it is harder to test and debug (Chrome is the best tool for this IMO as a fan of FF). You better have a very straight forward way to update your service worker right off the bat.