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Test Info: Warnings
- This test has a WPT meta file that expects 1 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /css/css-values/tree-counting/calc-sibling-function-in-shadow-dom.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<title>CSS Values Test: sibling-index() and sibling-count() in flat tree</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<style>
#host > * {
orphans: sibling-index();
widows: sibling-count();
}
</style>
<div id="host">
<div>Some element.</div>
<div>Some other element.</div>
<div slot="unknown">This should be ignored.</div>
<div id="target">Some third element.</div>
</div>
<script>
test(() => {
host.attachShadow({mode: 'open'}).innerHTML = `
<style>
slot::slotted(*) {
z-index: sibling-index();
order: sibling-count();
}
</style>
<div>
<div>Some text before the slot.</div>
<slot></slot>
</div>
`;
assert_equals(getComputedStyle(target).zIndex, '3');
assert_equals(getComputedStyle(target).order, '3');
assert_equals(getComputedStyle(target).orphans, '3');
assert_equals(getComputedStyle(target).widows, '3');
}, 'Host children have sibling-index() and sibling-count() based on assignedNodes order');
</script>