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Test Info:

<!DOCTYPE HTML>
<html>
<!--
-->
<head>
<meta charset="utf-8">
<title>Test for Bug 1332876</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<iframe srcdoc="<html><body><span>Edit me!</span>"></iframe>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 1332876 **/
SimpleTest.waitForExplicitFinish();
SimpleTest.waitForFocus(function() {
let iframe = document.querySelector("iframe");
iframe.contentDocument.designMode = "on";
iframe.contentWindow.addEventListener("keypress", function() {
info("Hiding the iframe...");
iframe.style.display = "none";
document.body.offsetHeight;
ok(true, "did not crash");
SimpleTest.finish();
}, {once: true});
iframe.contentWindow.addEventListener("click", function() {
info("Waiting keypress event...");
// Use another macro task for avoiding impossible event nesting.
SimpleTest.executeSoon(() => {
synthesizeKey("a", {}, iframe.contentWindow);
});
}, {once: true});
let span = iframe.contentDocument.querySelector("span");
ok(span != null, "The span element should've been loaded in the iframe");
info("Waiting click event to focus the iframe...");
synthesizeMouseAtCenter(span, {}, iframe.contentWindow);
});
</script>
</pre>
</body>
</html>