portals/resources/postmessage-referrer.sub.html - external/w3c/web-platform-tests - Git at Google

 <!DOCTYPE html>
 <script>
   let message = {
     httpReferrer: '{{header_or_default(Referer, no-http-referrer)}}',
     documentReferrer: document.referrer || 'no-document-referrer',
   };
   window.portalHost.postMessage(message, "*");
 </script>
	<!DOCTYPE html>
	<script>
	let message = {
	httpReferrer: '{{header_or_default(Referer, no-http-referrer)}}',
	documentReferrer: document.referrer \|\| 'no-document-referrer',
	};
	window.portalHost.postMessage(message, "*");
	</script>