<!DOCTYPE html>
<link rel="match" href="backdrop-does-not-inherit-ref.html">
<link rel="help" href="https://fullscreen.spec.whatwg.org/#new-stacking-layer">
<style>
dialog {
    visibility: inherit;
    background: red;
}

dialog::backdrop {
    position: absolute;
    top: 100px;
    left: 100px;
    height: 100px;
    width: 100px;
    visibility: inherit;
    background: green;
}
</style>
<body>
Test that ::backdrop does not inherit from anything. The test passes if there is
a green box and no red.
<div style="visibility: hidden">
    <dialog></dialog>
</div>
<script>
document.querySelector('dialog').showModal();
</script>
</body>
