1681729.html - mozsearch

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<html class="reftest-wait">

<head>

<script>

  async function test() {

    // We need to go through the event loop first, so we're running this from

    // a timeout set from the load event. If we were adding a load from the load

    // event directly we'd just replace the iframe's session history entry

    // instead of cloning it (and replacing its children).

    let frame = document.getElementById("frame");

    let p = new Promise((r) => {

      frame.addEventListener("load", r, { once: true });

});

    frame.src = "1681729-inner2.html";

    await p;

    p = new Promise((r) => {

      frame.contentWindow.addEventListener("pageshow", r, { once: true });

});

    history.back();

    await p;

    document.documentElement.removeAttribute("class");

</script>

</head>

<body onload="setTimeout(test, 0);">

<iframe id="frame" src="1681729-inner1.html"></iframe>

</body>

</html>