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<!DOCTYPE html>
<html>
<head>
<link rel="match" href="top-layer-display-none-ref.html">
<link rel="help" href="https://fullscreen.spec.whatwg.org/#new-stacking-layer">
<style>
dialog {
height: 150px;
width: 150px;
outline: none;
}
::backdrop {
display: none;
}
.red {
background-color: red;
top: 200px;
}
#bottomDialog {
background-color: blue;
top: 50px;
display: none;
}
#topDialog {
background-color: green;
top: 100px;
left: 50px;
}
</style>
</head>
<body>
This tests that a top layer element is not rendered if it, or an ancestor, has display: none.
It passes if you see a green rectangle stacked on top of a blue rectangle, and see no red rectangles.
<dialog id="hiddenDialog" class="red" style="display: none;"></dialog>
<div id="container">
<div>
<dialog id="displayNoneChild1" class="red"></dialog>
<dialog id="displayNoneChild2" class="red"></dialog>
</div>
</div>
<dialog id="bottomDialog"></dialog>
<dialog id="topDialog"></dialog>
<script>
document.getElementById('hiddenDialog').showModal();
document.getElementById('displayNoneChild1').showModal();
document.getElementById('container').style.display = 'none';
document.getElementById('displayNoneChild2').showModal();
// Test that stacking works even if an element is added to the top layer when it has no renderer.
document.getElementById('bottomDialog').showModal();
document.getElementById('topDialog').showModal();
document.getElementById('bottomDialog').style.display = 'block';
</script>
</body>
</html>
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