iframe-with-subframes.html | Explore in Territory

<html>
<body onload="parent.startTest()">
<iframe id="subIframe1" onload="parent.parent.startTest()"></iframe>
<iframe id="subIframe2" onload="parent.parent.startTest()"></iframe>
</body>
</html>

chromium/third_party/blink/web_tests/external/wpt/page-visibility/resources/iframe-with-subframes.html