| <script> | |
| function frameLoaded() { | |
| if (window.opener) | |
| window.opener.postMessage('done', '*'); | |
| } | |
| </script> | |
| <iframe onload="frameLoaded()" src="data:text/html,<html><iframe src='http://example.test:8080/security/mixedContent/resources/boring.html'></iframe></html>"></iframe> |