wpt/css/css-conditional/container-queries/aspect-ratio-feature-evaluation.html at master · web-platform-tests/wpt · GitHub

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<!doctype html>
<title>@container queries with aspect-ratio</title>
<link rel="help" href="https://drafts.csswg.org/css-conditional-5/#aspect-ratio">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
  .container {
    width: 100px;
    height: 100px;
  }
  #inline-size { container-type: inline-size; }
  #size { container-type: size; }
  span { color: red }
  @container (min-aspect-ratio: 1 / 1000) {
    span { color: green; }
  }
  @container (min-aspect-ratio: 2 / 1) {
    span { background-color: lime; }
  }
</style>
<div id="inline-size" class="container"><span></span></div>
<div id="size" class="container"><span></span></div>
<script>
  setup(() => assert_implements_size_container_queries());

  const red = "rgb(255, 0, 0)";
  const green = "rgb(0, 128, 0)";
  const lime = "rgb(0, 255, 0)";
  const transparent = "rgba(0, 0, 0, 0)";

  const inline_span = document.querySelector("#inline-size > span");
  const size_span = document.querySelector("#size > span");

  test(() => {
    assert_equals(getComputedStyle(inline_span).color, red,
                  "Should not match for inline-size containment");
    assert_equals(getComputedStyle(size_span).color, green,
                  "Should match for block-size containment");
    assert_equals(getComputedStyle(size_span).backgroundColor, transparent,
                  "Square should not match 2/1 min-ratio");
  }, "@container queries with aspect-ratio and size containment");

  test(() => {
    document.querySelector("#size").style.width = "200px";
    assert_equals(getComputedStyle(size_span).backgroundColor, lime,
                  "Should match 2/1 min-ratio");
  }, "@container query with aspect-ratio change after resize");
</script>