Similar to what Sean has mentioned, you can use postMessage. I’ve spent so much time trying different ways to resize iframe with cross-domain but no luck until I stumbled on this great blog post by David Walsh: http://davidwalsh.name/window-iframe
This is a combination of my code and David’s solution. My solution is geared specifically toward resizing iframes.
In the child page, find the height of the page and pass it to the parent page (which contains the iframe). Replace element_id with your element id (html, body, whatever).
<script>
function adjust_iframe_height(){
var actual_height = document.getElementById('element_id).scrollHeight;
parent.postMessage(actual_height,"*");
//* allows this to post to any parent iframe regardless of domain
}
</script>
<body onload="adjust_iframe_height();">
//call the function above after the content of the child loads
On the parent window, add this code. Replace iframe_id with your iframe ID:
<script>
// Create IE + others compatible event handler
var eventMethod = window.addEventListener ? "addEventListener" : "attachEvent";
var eventer = window[eventMethod];
var messageEvent = eventMethod == "attachEvent" ? "onmessage" : "message";
// Listen to message from child window
eventer(messageEvent,function(e) {
console.log('parent received message!: ',e.data);
document.getElementById('iframe_id').height = e.data + 'px';
},false);
</script>
If you open the console, you will see the height being printed in the console log. This will help you in debugging which is why I left it there.
Best,
Baker