LayoutTests/fast/frames/modifications-in-subtree-unload.html - WebKit - Git at Google

 <!DOCTYPE html>

 <p>
     This tests that you can append children to a subtree that's being removed
     from inside of an unload handler on a frame in that subtree.
 </p>

 <div><iframe src="about:blank"></iframe></div>

 <script>
 div = document.querySelector("div");
 iframe = document.querySelector("iframe");
 iframe.contentWindow.onunload = function() {
     try {
         div.appendChild(document.createElement('span'));
         document.body.appendChild(document.createTextNode('PASS'));
     } catch (e) {
         document.body.appendChild(document.createTextNode('FAIL: ' + e));
     }
 };

 div.parentNode.removeChild(div);
 </script>
	<!DOCTYPE html>

	<p>
	This tests that you can append children to a subtree that's being removed
	from inside of an unload handler on a frame in that subtree.
	</p>

	<div><iframe src="about:blank"></iframe></div>

	<script>
	div = document.querySelector("div");
	iframe = document.querySelector("iframe");
	iframe.contentWindow.onunload = function() {
	try {
	div.appendChild(document.createElement('span'));
	document.body.appendChild(document.createTextNode('PASS'));
	} catch (e) {
	document.body.appendChild(document.createTextNode('FAIL: ' + e));
	}
	};

	div.parentNode.removeChild(div);
	</script>