File: removed-element-is-removed-from-top-layer.html

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<!DOCTYPE html>
<html>
<head>
<link rel="match" href="removed-element-is-removed-from-top-layer-ref.html">
<link rel="help" href="https://fullscreen.spec.whatwg.org/#new-stacking-layer">
<style>
dialog {
    height: 100px;
    width: 100px;
}

::backdrop {
    display: none;
}

#bottomDialog {
    background-color: blue;
    top: 231px;
}

#topDialog {
    background-color: green;
    top: 50px;
    left: 50px;
}
</style>
</head>
<body>
<p>Bug <a href="https://bugs.webkit.org/show_bug.cgi?id=105489">105489</a>: Elements must be reattached when inserted/removed from top layer
<p>The test passes if you see a green rectangle stacked on top of a blue rectangle.
<dialog id="bottomDialog"></dialog>
<dialog id="topDialog"></dialog>
<script>
document.getElementById('topDialog').showModal();
var bottomDialog = document.getElementById('bottomDialog');
bottomDialog.showModal();
bottomDialog.offsetTop;  // force a layout
var parent = bottomDialog.parentNode;
parent.removeChild(bottomDialog);
parent.appendChild(bottomDialog);
</script>
</body>
</html>