title: Open external links in webview as default in IOS PWA
body: <p>I'm testing Progressive Web App in IOS 11.3.</p>
  
  <p>My pwa has a Facebook social login button that, when clicked, points to an external link (different windows.location).</p>
  
  <p>The problem is that the pwa opens safari app to show external links instead of using a webview within the pwa. So, when the login is done, you will not be redirected to the pwa, but remains in safari.</p>
  
  <p>I tried following examples like this one:  <a href="https://gist.github.com/kylebarrow/1042026" rel="nofollow noreferrer">https://gist.github.com/kylebarrow/1042026</a> but seems not working</p>
  
  <p>How can I force the pwa to open external links in a webview?</p>
  
  <p>Thanks in advance</p>