Example of using iframely.events.on('heightChanged') event with dynamic embed.js script loading.

iframely-load-event.html

  <script>

    var iframely = window.iframely = window.iframely || {};
    var widgets = iframely.widgets = iframely.widgets || {};
    
    function iframelyLoaded() {
      iframely.events.on('heightChanged', function(iframe, oldHeight, newHeight) {
        // your handler here, like
        // adjustScroll(newHeight - oldHeight);
        // iframe is a dom element, heights are numbers
      });
    }
    
    if (widgets.load) {
      iframelyLoaded();
    } else {
      widgets._e = widgets._e || [];
      widgets._e.push(iframelyLoaded);      
    }
    
  </script>
  <script async src="//cdn.iframe.ly/embed.js"></script>