ambient-light/support-iframe.html - external/w3c/web-platform-tests - Git at Google

 <!DOCTYPE HTML>
 <meta charset="utf-8">
 <script>
 try {
   let sensor = new AmbientLightSensor();
   parent.postMessage( "sensor.start() can be fired within iframes" , '*');
 } catch (e) {
   parent.postMessage( e.name , '*');
 }
 </script>
	<!DOCTYPE HTML>
	<meta charset="utf-8">
	<script>
	try {
	let sensor = new AmbientLightSensor();
	parent.postMessage( "sensor.start() can be fired within iframes" , '*');
	} catch (e) {
	parent.postMessage( e.name , '*');
	}
	</script>