<html>
  <head>
    <script>
      function checkHaveLoadedNewDoc() {
        let l = document.body.firstChild.contentWindow.location.href;
        if (!l.endsWith("file_fragment_handling_during_load_frame2.sjs")) {
          opener.ok(true, "Fine. We will check later.");
          setTimeout(checkHaveLoadedNewDoc, 500);
          return;
        }
        opener.ok(true, "Have loaded a new document.");
        opener.finishTest();
      }
      function test() {
        // Test that executing back() before load has started doesn't interrupt
        // the load.
        var ifr = document.getElementsByTagName("iframe")[0];
        ifr.onload = checkHaveLoadedNewDoc;
        ifr.contentWindow.location.hash = "b";
        ifr.contentWindow.location.href = "file_fragment_handling_during_load_frame2.sjs";
        history.back();
      }
    </script>
  </head>
  <body onload="setTimeout(test, 0)"><iframe src="file_fragment_handling_during_load_frame1.html#a"></iframe>
  </body>
</html>
