webmessaging/resources/post-cryptokey-to-opener.html - external/w3c/web-platform-tests - Git at Google

 <!DOCTYPE html>
 <script>
 crypto.subtle.generateKey({name: 'AES-CBC', length: 128}, false, ['encrypt', 'decrypt'])
 .then(key => opener.postMessage({key}, '*'))
 .catch(error => opener.postMessage({error: error.toString()}, '*'));
 </script>
	<!DOCTYPE html>
	<script>
	crypto.subtle.generateKey({name: 'AES-CBC', length: 128}, false, ['encrypt', 'decrypt'])
	.then(key => opener.postMessage({key}, '*'))
	.catch(error => opener.postMessage({error: error.toString()}, '*'));
	</script>