<!DOCTYPE html> <title>Element ready check for child of 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><!-- script inserts child here --></iframe> <script> async_test(function(t) { var div = document.createElement("div"); document.querySelector("iframe").appendChild(div); document.onfullscreenchange = t.unreached_func("fullscreenchange event"); document.onfullscreenerror = t.step_func_done(); trusted_request(div, document.body); }); </script>