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

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<!DOCTYPE html>
<title>CSS Conditional Test: CSSContainerRule API</title>
<link rel="help" href="https://un5n798jx6qx6j0rmf2verhh.julianrbryant.com/css-conditional-5/#the-csscontainerrule-interface">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style id="style_elm">
</style>
<script>
  const sheet = style_elm.sheet;

  function insertRule(source_text) {
    try {
      while (sheet.cssRules.length) {
        sheet.deleteRule(0);
      }
      sheet.insertRule(source_text);
      return sheet.cssRules[0];
    } catch (e) {
      return null;
    }
  }

  test(() => {
    const rule = insertRule("@container Name {}");
    assert_true(!!rule, "Rule successfully parsed");
    assert_equals(rule.containerName, "Name");
    assert_equals(rule.containerQuery, "");
  }, "containerName without query");

  test(() => {
    const rule = insertRule("@container (width > 300px) {}");
    assert_true(!!rule, "Rule successfully parsed");
    assert_equals(rule.containerName, "");
    assert_equals(rule.containerQuery, "(width > 300px)");
  }, "containerQuery without name");

  test(() => {
    const rule = insertRule("@container Name (width > 300px) {}");
    assert_true(!!rule, "Rule successfully parsed");
    assert_equals(rule.containerName, "Name");
    assert_equals(rule.containerQuery, "(width > 300px)");
  }, "containerName and containerQuery");

  test(() => {
    const rule = insertRule("@container Name (width > 300px) {}");
    assert_true(!!rule, "Rule successfully parsed");
    assert_equals(rule.conditions.length, 1);
    assert_equals(rule.conditions[0].name, "Name");
    assert_equals(rule.conditions[0].query, "(width > 300px)");
  }, ".conditions");

  test(() => {
    const rule = insertRule("@container (width > 300px) {}");
    assert_true(!!rule, "Rule successfully parsed");
    assert_equals(rule.conditions.length, 1);
    assert_equals(rule.conditions[0].name, "");
    assert_equals(rule.conditions[0].query, "(width > 300px)");
  }, ".conditions without name");

  test(() => {
    const rule = insertRule("@container (width > 300px), Name (width < 1000px) {}");
    assert_true(!!rule, "Rule successfully parsed");
    assert_equals(rule.conditions.length, 2);
    assert_equals(rule.containerName, "");
    assert_equals(rule.containerQuery, "");
    assert_equals(rule.conditions[0].name, "");
    assert_equals(rule.conditions[0].query, "(width > 300px)");
    assert_equals(rule.conditions[1].name, "Name");
    assert_equals(rule.conditions[1].query, "(width < 1000px)");
  }, "multiple conditions");
</script>