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<!doctype html>
<meta charset="utf-8">
<title>CSS Container Queries Test: style query container for Shadow DOM</title>
<link rel="help" href="https://drafts.csswg.org/css-conditional-5/#query-container">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<div id="ancestor-across-root">
<div style="--foo: bar">
<template shadowrootmode="open">
<style>
@container style(--foo: bar) {
#t1 { color: green; }
}
</style>
<div id="t1"></div>
</template>
</div>
</div>
<div id="ancestor-slotting">
<div style="--foo: bar">
<template shadowrootmode="open">
<div style="--foo: baz">
<slot></slot>
</div>
</template>
<style>
@container style(--foo: baz) {
#t2 { color: green; }
}
</style>
<div id="t2"></div>
</div>
</div>
<div id="ancestor-slotted">
<div style="--foo: baz">
<template shadowrootmode="open">
<style>
@container style(--foo: bar) {
::slotted(#t3) { color: green; }
}
</style>
<slot style="--foo: bar"></slot>
</template>
<div id="t3"></div>
</div>
</div>
<div id="ancestor-host" style="--foo: bar">
<div id="t4">
<template shadowrootmode="open">
<style>
@container style(--foo: bar) {
:host(#t4) { color: green; }
}
</style>
</template>
</div>
</div>
<div id="ancestor-part">
<div style="--foo: bar">
<template shadowrootmode="open">
<div style="--foo: baz">
<span id="t5" part="part"></span>
</div>
</template>
<style>
@container style(--foo: baz) {
#ancestor-part > div::part(part) { color: green; }
}
</style>
</div>
</div>
<div id="ancestor-slotted-before">
<div>
<template shadowrootmode="open">
<style>
@container style(--foo: baz) {
::slotted(#t6)::before {
content: "X";
color: green;
}
}
</style>
<slot style="--foo: bar"></slot>
</template>
<div id="t6" style="--foo: baz"></div>
</div>
</div>
<div id="ancestor-host-before">
<div id="t7" style="--foo: bar">
<template shadowrootmode="open">
<style>
@container style(--foo: bar) {
:host(#t7)::before {
content: "X";
color: green;
}
}
</style>
</template>
</div>
</div>
<div id="ancestor-part-before">
<style>
@container style(--foo: quz) {
#ancestor-part-before > div::part(part)::before {
content: "X";
color: green;
}
}
</style>
<div style="--foo: bar">
<template shadowrootmode="open">
<div style="--foo: baz">
<span id="t8" part="part" style="--foo: quz"></span>
</div>
</template>
</div>
</div>
<div id="ancestor-inner-part">
<style>
@container style(--foo: quz) {
#ancestor-inner-part > div::part(inner-part) { color: green; }
}
</style>
<div style="--foo: bar">
<template shadowrootmode="open">
<div exportparts="inner-part" style="--foo: baz">
<template shadowrootmode="open">
<div style="--foo: quz">
<span id="t9" part="inner-part"></span>
</div>
</template>
</div>
</template>
</div>
</div>
<div id="ancestor-slot-fallback">
<div><template shadowrootmode="open">
<style>
@container style(--foo: bar) {
#t10 { color: green; }
}
</style>
<div>
<slot style="--foo: bar"><span id="t10"></span></slot>
</div>
</template></div>
</div>
<div id="container-for-part">
<div>
<template shadowrootmode="open">
<div style="--foo: bar">
<span id="t11" part="part"></span>
</div>
</template>
<style>
@container style(--foo: bar) {
#container-for-part > div::part(part) { color: green; }
}
</style>
</div>
</div>
<div id="inner-scope-host-part" style="--foo: bar">
<div>
<template shadowrootmode="open">
<style>
@container style(--foo: baz) {
:host::part(part) { color: green; }
}
</style>
<div style="--foo: baz">
<span id="t12" part="part"></span>
</div>
</template>
</div>
</div>
<script>
setup(() => {
assert_implements_style_container_queries();
});
const green = "rgb(0, 128, 0)";
test(() => {
const t1 = document.querySelector("#ancestor-across-root > div").shadowRoot.querySelector("#t1");
assert_equals(getComputedStyle(t1).color, green);
}, "Match container in outer tree");
test(() => {
const t2 = document.querySelector("#t2");
assert_equals(getComputedStyle(t2).color, green);
}, "Match container in the shadow tree for a host child in the host child's tree scope");
test(() => {
const t3 = document.querySelector("#t3");
assert_equals(getComputedStyle(t3).color, green);
}, "Match <slot> as a container for ::slotted element");
test(() => {
const t4 = document.querySelector("#t4");
assert_equals(getComputedStyle(t4).color, green);
}, "Match container in outer tree for :host");
test(() => {
const t5 = document.querySelector("#ancestor-part > div").shadowRoot.querySelector("#t5");
assert_equals(getComputedStyle(t5).color, green);
}, "Match ::part's parent in the shadow tree as the container for ::part");
test(() => {
const t6 = document.querySelector("#t6");
assert_equals(getComputedStyle(t6, "::before").color, green);
}, "Match ::slotted as a container for its ::before");
test(() => {
const t7 = document.querySelector("#t7");
assert_equals(getComputedStyle(t7, "::before").color, green);
}, "Match container in outer tree for :host::before");
test(() => {
const t8 = document.querySelector("#ancestor-part-before > div").shadowRoot.querySelector("#t8");
assert_equals(getComputedStyle(t8, "::before").color, green);
}, "Match the ::part as a container for ::before on ::part elements");
test(() => {
const outerhost = document.querySelector("#ancestor-inner-part > div");
const innerhost = outerhost.shadowRoot.querySelector("div");
const t9 = innerhost.shadowRoot.querySelector("#t9");
assert_equals(getComputedStyle(t9).color, green);
}, "Match container for ::part selector in inner shadow tree for exportparts");
test(() => {
const t10 = document.querySelector("#ancestor-slot-fallback > div").shadowRoot.querySelector("#t10");
assert_equals(getComputedStyle(t10).color, green);
}, "Match container for slot light tree child fallback");
test(() => {
const t11 = document.querySelector("#container-for-part > div").shadowRoot.querySelector("#t11");
assert_equals(getComputedStyle(t11).color, green);
}, "Should match parent container inside shadow tree for ::part()");
test(() => {
const t12 = document.querySelector("#inner-scope-host-part > div").shadowRoot.querySelector("#t12");
assert_equals(getComputedStyle(t12).color, green);
}, "A :host::part rule matching a container in the shadow tree");
</script>
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