3 Answers

• did you try leaving the contentHeight property empty?
  a Workaround could be using the scroll Event and check if it gives the right height.

• If you want the height:
  scroll.getSize().height;

  If you want the contentHeight:

  var cnt = scroll.children.length;
  var lastChild = scroll.children[cnt-1];
  var cHeight = (lastChild.center.y + (lastChild.getSize().height / 2)) - scroll.getSize().height;
  

• People i fixed it by detecting the height of the webview whitin it!

      myTimer = setInterval(function () 
      {
          actualHeight = text.evalJS("document.height;");        
  
          if(actualHeight > 10)
          {
  
          }
      },100);