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

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<!DOCTYPE html>
<title>CSS Container Queries Test: var() in size query values</title>
<link rel="help" href="https://un5n798jx6qx6j0rmf2verhh.julianrbryant.com/css-conditional-5/#size-container">
<link rel="help" href="https://un5n798jx6qx6j0rmf2verhh.julianrbryant.com/mediaqueries-4/#units">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/8088">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
  #container {
    container-type: size;
    width: 200px;
    --query: 100px;
    --invalid-value: initial;
  }

  @container (width > var(--invalid-value, var(--query, 500px))) {
    #target {
      height: 50px;
      background-color: green;
    }
  }
</style>
<div id=container>
  <div id=target></div>
</div>
<script>
  setup(() => assert_implements_size_container_queries());

  test(() => {
    assert_equals(getComputedStyle(target).backgroundColor, 'rgb(0, 128, 0)');
  }, 'inline-size with var-substitution');
</script>