webmessaging/broadcastchannel/resources/sandboxed.html - external/github.com/web-platform-tests/wpt - Git at Google

 <!DOCTYPE html>
 <meta charset=utf-8>
 <script>
 try {
   let c = new BroadcastChannel('foo');
   parent.postMessage('Created', '*');
 } catch (e) {
   parent.postMessage('Exception: ' + e.name, '*');
 }
 </script>
	<!DOCTYPE html>
	<meta charset=utf-8>
	<script>
	try {
	let c = new BroadcastChannel('foo');
	parent.postMessage('Created', '*');
	} catch (e) {
	parent.postMessage('Exception: ' + e.name, '*');
	}
	</script>