style-query-registered-custom-removed-initial.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-conditional/container-queries/style-query-registered-custom-removed-initial.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>CSS Container Queries Test: style() query matching registered custom property initial value</title>

<link rel="help" href="https://drafts.csswg.org/css-conditional-5/#style-container">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="support/cq-testcommon.js"></script>

<style id="style_sheet">

  @property --length {

    syntax: "<length>";

    initial-value: 30px;

    inherits: true;

  #container { container-name: --container; }

  #target { color: lime; }

  @container --container style(--length: 30px) {

    #target { color: green; }

</style>

<div id="container">

  <div id="target"></div>

</div>

<script>

  setup(() => assert_implements_style_container_queries());

  test(() => {

    assert_equals(getComputedStyle(target).color, "rgb(0, 128, 0)");

  }, "Query matching initial value of registered property");

  test(() => {

    style_sheet.sheet.deleteRule(0);

    assert_equals(getComputedStyle(target).color, "rgb(0, 255, 0)");

  }, "Query no longer matching initial value after @property rule is removed");

</script>