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by gigaftp 2775 days ago
PWA = Progressive Web Application

It's basically a set of techniques and technologies developed in an attempt to produce a user experience similar to that of a native application when using a web application.

In the case of not having a service worker, well, a PWA without services workers doesn't make much sense. This is because service workers are used to cache content to create that 'native' feeling of your application not 404ing when you go through a tunnel.