title: onscroll event not being triggered on iPad after single touch panning?
body: <p>In trying to figure out the scroll position for a UIWebView, I'm attaching a listener in the HTML that will call back to the main app. I attach the javascript listener like:</p>
  
  <pre><code>window.onscroll = function reportScroll() {
      var sY = window.pageYOffset;
      alert('Scroll pos: '+sY);  // Would evetually trigger a URL or something
  }
  </code></pre>
  
  <p>This event only seems to be triggered at the end of a flick scroll on OS 3.2 (iPad), once the deceleration has ended. However this: <a href="https://developer.apple.com/library/content/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html#//apple_ref/doc/uid/TP40006511-SW7" rel="nofollow noreferrer">https://developer.apple.com/library/content/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html#//apple_ref/doc/uid/TP40006511-SW7</a> seems to indicate that it should be triggered at the end of a single finger pan as well. I really need to know when that pan completes as well. </p>