svg-foreignobject-child-container.html

<!doctype html>
<title>CSS Container Queries Test: size query container inside foreignObject</title>
<link rel="help" href="https://drafts.csswg.org/css-conditional-5/#size-container">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
  svg {
    display: block;
    width: 200px;
    height: 200px;
    container-type: size;
  }
  #container {
    width: 100px;
    height: 100px;
    container-type: size;
  }
  @container (width = 100px) {
    #inner { color: green; }
  }
</style>
<svg>
  <foreignObject>
    <div id="container">
      <div id="inner">Green</div>
    </div>
  </foreignObject>
</svg>
<script>
  setup(() => assert_implements_container_queries());

  const green = "rgb(0, 128, 0)";

  test(() => {
    assert_equals(getComputedStyle(inner).color, green);
  }, "#inner querying #container inside foreignObject");
</script>

chromium/third_party/blink/web_tests/external/wpt/css/css-conditional/container-queries/svg-foreignobject-child-container.html