xhr/open-url-javascript-window.htm

<!DOCTYPE html>
<html>
  <head>
    <title>XMLHttpRequest: open() - resolving URLs (javascript: &lt;iframe>; 1)</title>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <link rel="help" href="https://xhr.spec.whatwg.org/#the-open()-method" data-tested-assertations="following::ol[1]/li[2]/ol[1]/li[2] following::ol[1]/li[7] following::ol[1]/li[14]/ul/li[2]" />
  </head>
  <body>
    <div id="log"></div>
    <script>
      var test = async_test()
      function request() {
        test.step(function() {
          var x = new XMLHttpRequest()
          x.open("GET", "folder.txt", false)
          x.send(null)
          assert_equals(x.responseText, "top\n")
          test.done()
        })
      }
      test.step(function() {
        var iframe = document.body.appendChild(document.createElement("iframe"))
        iframe.src = "javascript:parent.request()"
      })
    </script>
  </body>
</html>