XMLHttpRequest/event-upload-progress-crossorigin.htm

<!doctype html>
<html lang=en>
<meta charset=utf-8>
<title>XMLHttpRequest: upload progress event for cross-origin requests</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<div id="log"></div>
<script>
const remote = get_host_info().HTTP_REMOTE_ORIGIN + "/XMLHttpRequest/resources/corsenabled.py",
      redirect = "resources/redirect.py?code=307&location=" + remote;

[remote, redirect].forEach(url => {
  async_test(test => {
    const client = new XMLHttpRequest();
    client.upload.onprogress = test.step_func_done()
    client.onload = test.unreached_func()
    client.open("POST", url)
    client.send("On time: " + url)
  }, "Upload events registered on time (" + url + ")");
});

[remote, redirect].forEach(url => {
  async_test(test => {
    const client = new XMLHttpRequest();
    client.onload = test.step_func_done();
    client.open("POST", url);
    client.send("Too late: " + url);
    client.upload.onloadstart = test.unreached_func(); // registered too late
    client.upload.onprogress = test.unreached_func(); // registered too late
  }, "Upload events registered too late (" + url + ")");
});
</script>