style-container-for-shadow-dom.html

<!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_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>
chromium/third_party/blink/web_tests/external/wpt/css/css-conditional/container-queries/style-container-for-shadow-dom.html
