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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/semantics/interactive-elements/the-dialog-element/backdrop-descendant-selector.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<link rel="match" href="backdrop-descendant-selector-ref.html">
<style>
dialog {
visibility: hidden;
}
::backdrop {
visibility: visible;
position: absolute;
height: 100px;
width: 100px;
background: red;
}
/* This shouldn't be matched, dialog is not the parent of ::backdrop.
* It is given high specificity so we actually test something.
*/
#dialog-parent > #dialog > ::backdrop,
#dialog-parent > #dialog ::backdrop {
background: red;
}
#dialog-parent > ::backdrop {
top: 100px;
left: 100px;
background: green;
}
#backdrop-ancestor ::backdrop {
top: 100px;
left: 300px;
background: green;
}
</style>
</head>
<body>
Test ::backdrop used in descendant selectors. The test passes if there are two green boxes and no red.
<div id="dialog-parent">
<dialog id="dialog"></dialog>
</div>
<div id="backdrop-ancestor">
<p><span><dialog></dialog></span></p>
</div>
<script>
var dialogs = document.querySelectorAll('dialog');
for (var i = 0; i < dialogs.length; ++i)
dialogs[i].showModal();
</script>
</body>
</html>