title: Reference error: Can't find variable: IntersectionObserver
body: <p>I'm trying to use IntersectionObserver in cordova 8.0.0 app which is running on ios 13. When I inspect my app via safari, I see an error on intialization: </p>
  
  <p><code>ReferenceError: Can't find variable: IntersectionObserver</code></p>
  
  <p>This would suggest, that IntersectionObserver is not available, and I should use a polyfill. But! I've read many post claiming that IntersectionObserver is nativly supported in iOS safari 12+. And I kinda assume, that cordova would be running nativly available WKWebView, so it should work without polyfill, right?  </p>
  
  <p>I've found that I've got IntersectionObserver enabled in my safari experimental features, so maybe there is an option/flag I could use to force enable this feature in my app as well? I'd really like to avoid using polyfill if it's possible..</p>
  
  <p>Thx to any suggestions</p>