<!DOCTYPE html>
<html>
<head>
<title>Document.write() silently fails from an Async script</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<meta description="This test ensures Document.write() silently fails from an Async script." />
<link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
<link rel="help" href="https://html.spec.whatwg.org/multipage/#execute-the-script-block"/>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script type="text/javascript">
var t = async_test("Document.write() silently fails from an Async script");
var log = t.step_func(function() {
document.write("<span id='writtenText'/>");
assert_equals(null, document.getElementById('writtenText'));
t.done();
});
</script>
</head>
<body>
<div id=log></div>
<script type="text/javascript" src="log.py?sec=1&id=1" async></script>
</body>
</html>