<!DOCTYPE html> <title>Element ready check for containing iframe</title> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script src="/resources/testdriver.js"></script> <script src="/resources/testdriver-vendor.js"></script> <script src="../trusted-click.js"></script> <div id="log"></div> <iframe allowfullscreen></iframe> <iframe allowfullscreen></iframe> <script> // wait for load event to avoid https://bugzil.la/1493878 window.onload = function () { promise_test(async function (t) { const [iframe1, iframe2] = document.getElementsByTagName("iframe"); iframe2.contentDocument.onfullscreenerror = t.unreached_func( "fullscreenerror event" ); await Promise.all([ trusted_request( iframe1.contentDocument.body, iframe1.contentDocument.body ), fullScreenChange(), ]); assert_equals(document.fullscreenElement, iframe1); await Promise.all([ trusted_request( iframe2.contentDocument.body, iframe1.contentDocument.body ), fullScreenChange(iframe2.contentDocument), ]); }, "Element ready check for containing iframe"); }; </script>