xmlhttprequest-in-pagehide.html | Explore in Territory

<!DOCTYPE html>
<html>
<head>
<script>
function loadXML()
{
    url = 'endlessxml.php';

    try {
        xhr = new XMLHttpRequest();
        xhr.overrideMimeType('text/xml');
        xhr.onreadystatechange = readyStateChanged;
        xhr.parent = window.parent;
        xhr.open('GET', url);
        xhr.onabort = loadImage;
        xhr.send(null);
    } catch (ex) {
        window.parent.log("Exception doing XMLHttpRequest "+ ex.message);
    }
}

function loadImage()
{
    image = new Image();
    image.src = "data:,foo";
    document.body.appendChild(image);
}

function readyStateChanged(evt)
{
   evt.target.parent.dumpRequestStatus(evt.target);
}
</script>
</head>
<body onload="window.parent.subframeLoaded()" onpagehide="loadXML()">
</body>
</html>

chromium/third_party/blink/web_tests/http/tests/xmlhttprequest/resources/xmlhttprequest-in-pagehide.html