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container-for-shadow-dom.html
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<!doctype html>
<meta charset="utf-8">
<title>CSS Container Queries Test: 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>
<style>
#ancestor-across-root,
#ancestor-skip-slotting,
#ancestor-slotted,
#ancestor-host,
#ancestor-part,
#ancestor-slotted-before,
#ancestor-host-before,
#ancestor-part-before,
#ancestor-inner-part,
#ancestor-slot-fallback,
#inner-scope-host-part {
width: 400px;
container-type: inline-size;
}
</style>
<div id="ancestor-across-root">
<div>
<template shadowrootmode="open">
<style>
@container (width = 400px) {
#t1 { color: green; }
}
</style>
<div id="t1"></div>
</template>
</div>
</div>
<div id="ancestor-skip-slotting">
<div>
<template shadowrootmode="open">
<style>
div {
width: 200px;
container-type: inline-size;
}
</style>
<div>
<slot></slot>
</div>
</template>
<style>
@container (width = 200px) {
#t2 { color: green; }
}
</style>
<div id="t2"></div>
</div>
</div>
<div id="ancestor-slotted">
<div>
<template shadowrootmode="open">
<style>
slot {
display: block;
width: 200px;
container-type: inline-size;
}
@container (width = 200px) {
::slotted(#t3) { color: green; }
}
</style>
<slot></slot>
</template>
<div id="t3"></div>
</div>
</div>
<div id="ancestor-host">
<div id="t4">
<template shadowrootmode="open">
<style>
@container (width = 400px) {
:host(#t4) { color: green; }
}
</style>
</template>
</div>
</div>
<div id="ancestor-part">
<div>
<template shadowrootmode="open">
<style>
div {
width: 200px;
container-type: inline-size;
}
</style>
<div>
<span id="t5" part="part"></span>
</div>
</template>
<style>
@container (width = 200px) {
#ancestor-part > div::part(part) { color: green; }
}
</style>
</div>
</div>
<div id="ancestor-slotted-before">
<div>
<template shadowrootmode="open">
<style>
slot {
display: block;
width: 200px;
container-type: inline-size;
}
@container (width = 400px) {
::slotted(#t6)::before {
content: "X";
color: green;
}
}
</style>
<slot></slot>
</template>
<style>
#t6 {
width: 400px;
container-type: inline-size;
}
</style>
<div id="t6"></div>
</div>
</div>
<div id="ancestor-host-before">
<div id="t7">
<template shadowrootmode="open">
<style>
:host {
width: 200px;
container-type: inline-size;
}
@container (width = 200px) {
:host(#t7)::before {
content: "X";
color: green;
}
}
</style>
</template>
</div>
</div>
<div id="ancestor-part-before">
<style>
@container (width = 200px) {
#ancestor-part-before > div::part(part)::before {
content: "X";
color: green;
}
}
</style>
<div>
<template shadowrootmode="open">
<style>
div {
width: 200px;
container-type: inline-size;
}
</style>
<div>
<span id="t8" part="part"></span>
</div>
</template>
</div>
</div>
<div id="ancestor-inner-part">
<style>
@container (width = 200px) {
#ancestor-inner-part > div::part(inner-part) { color: green; }
}
</style>
<div>
<template shadowrootmode="open">
<style>
div {
width: 200px;
container-type: inline-size;
}
</style>
<div exportparts="inner-part">
<template shadowrootmode="open">
<style>
div {
width: 200px;
container-type: inline-size;
}
</style>
<div>
<span id="t9" part="inner-part"></span>
</div>
</template>
</div>
</template>
</div>
</div>
<div id="ancestor-slot-fallback">
<div><template shadowrootmode="open">
<style>
div {
width: 200px;
container-type: inline-size;
}
@container (width = 200px) {
#t10 { color: green; }
}
</style>
<div>
<slot><span id="t10"></span></slot>
</div>
</template></div>
</div>
<div id="no-container-for-part">
<div>
<template shadowrootmode="open">
<style>
div {
width: 200px;
container-type: inline-size;
}
#t11 { color: red; }
</style>
<div>
<span id="t11" part="part"></span>
</div>
</template>
<style>
@container (width = 200px) {
#no-container-for-part > div::part(part) { color: green; }
}
</style>
</div>
</div>
<div id="inner-scope-host-part">
<div>
<template shadowrootmode="open">
<style>
div {
width: 200px;
container-type: inline-size;
}
@container (width = 200px) {
:host::part(part) { color: green; }
}
</style>
<div>
<span id="t12" part="part"></span>
</div>
</template>
</div>
</div>
<div id="named-part-host">
<template shadowrootmode="open">
<style>
@container --part2 (width >= 0px) {
#named-part2-child { color: green; }
}
#named-part1 {
container: --part1 / inline-size;
color: green;
}
</style>
<div id="named-part1" part="part1">
<div id="named-part1-child" part="part1-child"></div>
</div>
<div part="part2">
<div id="named-part2-child" part="part2-child"></div>
</div>
</template>
<style>
#named-part-host::part(part2) { container: --part2 / inline-size; }
@container --part1 (width >= 0px) {
#named-part-host::part(part1-child) { background-color: red; }
}
</style>
</div>
<div id="named-slotted-host">
<template shadowrootmode="open">
<style>
@container --slot-container (width >= 0px) {
::slotted(#slotted1) { color: green; }
}
#named-slotted-container {
container: --slot-container / inline-size;
}
</style>
<div id="named-slotted-container">
<slot></slot>
</div>
</template>
<div id="slotted1"></div>
<div id="slotted2"></div>
<style>
@container --slot-container (width >= 0px) {
#slotted2 { color: red; }
}
</style>
</div>
<div id="named-host">
<template shadowrootmode="open">
<style>
:host {
container: --host-container / inline-size;
}
@container --host-container (width >= 0px) {
#host-descendant { color: green; }
::slotted(#host-slotted1) { color: green; }
}
</style>
<div id="host-descendant"></div>
<slot></slot>
</template>
<div id="host-slotted1"></div>
<div id="host-slotted2"></div>
<style>
@container --host-container (width >= 0px) {
#host-slotted2 { color: red; }
}
</style>
</div>
<script>
setup(() => {
assert_implements_size_container_queries();
});
const green = "rgb(0, 128, 0)";
const red = "rgb(255, 0, 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 walking flat tree ancestors");
test(() => {
const t3 = document.querySelector("#t3");
assert_equals(getComputedStyle(t3).color, green);
}, "Match container in ::slotted selector's originating element tree");
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 container in ::part selector's originating element tree");
test(() => {
const t6 = document.querySelector("#t6");
assert_equals(getComputedStyle(t6, "::before").color, green);
}, "Match container for ::before in ::slotted selector's originating element tree");
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 container for ::before in ::part selector's originating element tree");
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's originating element 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("#no-container-for-part > div").shadowRoot.querySelector("#t11");
assert_equals(getComputedStyle(t11).color, green);
}, "Should not match 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 should match containers in the originating element tree");
test(() => {
const target = document.querySelector("#named-part-host").shadowRoot.querySelector("#named-part1-child");
assert_equals(getComputedStyle(target).color, green);
}, "Container name set inside a shadow tree should not match query using ::part on the outside");
test(() => {
const target = document.querySelector("#named-part-host").shadowRoot.querySelector("#named-part2-child");
assert_equals(getComputedStyle(target).color, green);
}, "Container name set with a ::part should match query inside the shadow tree");
test(() => {
const target = document.querySelector("#slotted1");
assert_equals(getComputedStyle(target).color, green);
}, "Container name set inside a shadow tree should match query for a ::slotted() rule inside the tree");
test(() => {
const target = document.querySelector("#slotted2");
assert_not_equals(getComputedStyle(target).color, red);
}, "Container name set inside a shadow tree should not match query for host child on the outside");
test(() => {
const target = document.querySelector("#named-host").shadowRoot.querySelector("#host-descendant");
assert_equals(getComputedStyle(target).color, green);
}, "Container name set on :host from inside a shadow tree matching query inside the shadow tree");
test(() => {
const target = document.querySelector("#host-slotted1");
assert_equals(getComputedStyle(target).color, green);
}, "Container name set on :host from inside a shadow tree matching query for ::slotted inside the shadow tree");
test(() => {
const target = document.querySelector("#host-slotted2");
assert_not_equals(getComputedStyle(target).color, red);
}, "Container name set on :host from inside a shadow tree not matching query for slotted from the outside of the shadow tree");
</script>