title: When and how does a PWA update itself?
body: <p>As far as I know, once you click &quot;add to homescreen&quot; on a PWA's website, the browser generates an .apk using the provided manifest file and sources and installs it like a normal app.</p>
  <p>I noticed that when I update the website, the app also displays the updated content which suggests that the app is just a wrapper for accessing the website. I also noticed that the update to a website is not displayed instantly, I assume this is due to internal caching.</p>
  <p>My question is, are my assumptions correct? Or more generally, when and how are PWAs updated and is there a way to force an update on a client machine?</p>