<!DOCTYPE html> <title>Element ready check for containing iframe</title> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script src="../trusted-click.js"></script> <div id="log"></div> <iframe allowfullscreen></iframe> <iframe allowfullscreen></iframe> <script> async_test(function(t) { var iframes = document.getElementsByTagName("iframe"); trusted_request(iframes[0].contentDocument.body, document.body); iframes[0].contentDocument.onfullscreenchange = t.step_func(function() { trusted_request(iframes[1].contentDocument.body, iframes[0].contentDocument.body); iframes[1].contentDocument.onfullscreenchange = t.unreached_func("fullscreenchange event"); iframes[1].contentDocument.onfullscreenerror = t.step_func_done(); }); }); </script>