<script>
if (window.testRunner)
    testRunner.dumpAsText();

function test() {
    x4.click();
    x4.innerText = "PASS";
}

function on_details_click() {
    x4.prepend(document.getElementById("x43"));
    x70.addEventListener("DOMNodeRemoved", on_details_click);
}
</script>
<body onload="test()">
<details id="x4" open="" onclick="on_details_click()">
<summary id="x70" hidden="">