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<!DOCTYPE html>
<html>
<head>
<title>An async script does not block the parser while downloading</title>
<meta name="timeout" content="long">
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<meta description="This test ensures an async script does not block the parser while downloading." />
<link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
<link rel="help" href="https://html.spec.whatwg.org/multipage/#attr-script-async"/>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id=log></div>
<script type="text/javascript">
var t = async_test("An async script does not block the parser while downloading");
function timeout()
{
t.step(function(){ assert_equals(document.getElementById("testresult").innerHTML, "21")});
t.done();
}
var timer = setTimeout(timeout, 4000);
function log(text)
{
var textNode = document.createTextNode(text);
document.getElementById("testresult").appendChild(textNode);
}
</script>
<span id="testresult"></span>
<script src="log.py?sec=3&id=1" async></script>
<script>
log('2');
</script>
</body>
</html>
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