<!DOCTYPE html>
<html>
<body>
<script>

if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.waitUntilDone();
    testRunner.setCanOpenWindows();
    testRunner.setCloseRemainingWindowsWhenComplete();
    testRunner.overridePreference("WebKitUsesPageCachePreferenceKey", 1);
}

if (location.search == '?third') {
    alert('PASS');
    if (window.testRunner)
        testRunner.notifyDone();
} else if (self == top) {
    document.write(`<p>This tests navigating via an anchor element with a non-existent target name, which should create a new window.<br>
WebKit should not hit any assertions and alert "PASS".</p>`);
    const frame = document.createElement('iframe');
    frame.src = '?first';
    let step = 0;
    frame.onload = () => {
        switch (step++) {
        case 0:
            setTimeout(() => frame.src = '?second', 0);
            break;
        case 1:
            setTimeout(() => history.back(), 0);
            break;
        }
    }
    document.body.appendChild(frame);
} else {
    if (location.search == '?first') {
        if (localStorage.getItem('loaded')) {
            localStorage.removeItem('loaded');
            window.onload = () => {
                setTimeout(() => document.querySelector('a').click(), 0);
            }
        } else
            localStorage.setItem('loaded', 'true');
    }
    document.write(location.search);
    document.write(` <a href="?third" target="unknownTarget">go</a>`);
}

</script>
</body>
</html>