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<!doctype html>
<html>
<head>
<title>XMLHttpRequest: setRequestHeader() after send()</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="help" href="https://xhr.spec.whatwg.org/#the-setrequestheader()-method" data-tested-assertations="/following::ol/li[2]" />
</head>
<body>
<div id="log"></div>
<script>
var test = async_test()
test.step(function() {
var client = new XMLHttpRequest()
client.open("GET", "resources/delay.py?ms=0")
client.onreadystatechange = function() {
test.step(function() {
assert_throws("InvalidStateError", function() { client.setRequestHeader("x-test", "test") })
if(client.readyState == 4)
test.done()
})
}
client.send(null)
})
</script>
</body>
</html>
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