access-control-preflight-headers-async.htm

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This WPT test may be referenced by the following Test IDs:
- /xhr/access-control-preflight-headers-async.htm - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>Test that async CORS requests with custom headers are sent with OPTIONS preflight</title>

    <script src="/resources/testharness.js"></script>

    <script src="/resources/testharnessreport.js"></script>

    <script src="/common/get-host-info.sub.js"></script>

    <script src="/common/utils.js"></script>

  </head>

  <body>

    <script type="text/javascript">

async_test((test) => {

  let xhr = new XMLHttpRequest;

  const uuid = token();

  xhr.open("GET", get_host_info().HTTP_REMOTE_ORIGIN +

      "/xhr/resources/reset-token.py?token=" + uuid, false);

  xhr.send();

  xhr = new XMLHttpRequest;

  xhr.open("GET", get_host_info().HTTP_REMOTE_ORIGIN +

      "/xhr/resources/no-custom-header-on-preflight.py?token=" + uuid);

  xhr.setRequestHeader("x-test", "foobar");

  xhr.onerror = test.unreached_func("Unexpected error");

  xhr.onload = test.step_func_done(() => {

    assert_equals(xhr.responseText, "PASS");

});

  xhr.send();

}, "Preflighted async request with custom header");

    </script>

  </body>

</html>