chromium/src/third_party/blink/web_tests/fast/dom/shadow/resources/shadow-tree-listener-clearance-frame.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <html>
 <body>
 <div id="host"></div>
 <script>
 (function() {
     var shadow = document.getElementById("host").attachShadow({mode: 'open'});
     shadow.innerHTML = "<article id='target'></article>";
     document.targetInShadow = shadow.getElementById("target");
 })();
 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<body>
	<div id="host"></div>
	<script>
	(function() {
	var shadow = document.getElementById("host").attachShadow({mode: 'open'});
	shadow.innerHTML = "<article id='target'></article>";
	document.targetInShadow = shadow.getElementById("target");
	})();
	</script>
	</body>
	</html>