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<!DOCTYPE html>
<title>@scope - ShadowDOM</title>
<link rel="help" href="https://drafts.csswg.org/css-cascade-6/#scope-atrule">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/declarative-shadow-dom-polyfill.js"></script>
<div id=host_plain>
<template shadowrootmode=open>
<style>
@scope (:host) {
.a {
z-index: 1;
}
}
</style>
<div class=a>
</div>
</template>
</div>
<script>
setup(() => {
polyfill_declarative_shadow_dom(document);
});
test(() => {
let a = host_plain.shadowRoot.querySelector('.a');
assert_equals(getComputedStyle(a).zIndex, '1');
}, '@scope can match :host');
</script>
<div id=host_functional>
<template shadowrootmode=open>
<style>
@scope (:host(div)) {
.a {
z-index: 1;
}
}
/* Should not match: */
@scope (:host(span)) {
.a {
z-index: 42;
}
}
</style>
<div class=a>
</div>
</template>
</div>
<script>
setup(() => {
polyfill_declarative_shadow_dom(document);
});
test(() => {
let a = host_functional.shadowRoot.querySelector('.a');
assert_equals(getComputedStyle(a).zIndex, '1');
}, '@scope can match :host(...)');
</script>
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