at-scope-parsing.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-cascade/at-scope-parsing.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>@scope: parsing</title>

<link rel="help" href="https://drafts.csswg.org/css-cascade-6/#scope-atrule">

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

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

<main id=main></main>

<script>

  function test_valid(actual, expected) {

    if (expected === undefined)

      expected = actual;

    test(t => {

      t.add_cleanup(() => main.replaceChildren());

      let style = document.createElement('style');

      style.textContent = `${actual}{}`;

      main.append(style);

      assert_equals(style.sheet.rules.length, 1);

      let rule = style.sheet.rules[0];

      assert_equals(rule.cssText, `${expected} {\n}`);

    }, `${actual} is valid`);

  function test_invalid(actual) {

    test(t => {

      t.add_cleanup(() => main.replaceChildren());

      let style = document.createElement('style');

      style.textContent = `${actual}{}`;

      main.append(style);

      assert_equals(style.sheet.rules.length, 0);

    }, `${actual} is not valid`);

  test_valid('@scope (.a)');

  test_valid('@scope (.a + .b)');

  test_valid('@scope (.a:hover)');

  test_valid('@scope (.a:hover, #b, div)');

  test_valid('@scope (:is(div, span))');

  test_valid('@scope (.a) to (.b)');

  test_valid('@scope (.a)to (.b)', '@scope (.a) to (.b)');

  test_valid('@scope (.a) to (.b:hover, #c, div)');

  test_valid('@scope');

  test_valid('@scope to (.a)');

  test_valid('@scope (.a) to (&)');

  test_valid('@scope (.a) to (& > &)');

  test_valid('@scope (.a) to (> .b)', '@scope (.a) to (:scope > .b)');

  test_valid('@scope (.a) to (+ .b)', '@scope (.a) to (:scope + .b)');

  test_valid('@scope (.a) to (~ .b)', '@scope (.a) to (:scope ~ .b)');

  test_valid('@scope ()', '@scope');

  test_valid('@scope to ()', '@scope');

  test_valid('@scope () to ()', '@scope');

  // Forgiving behavior (keep invalid selector as-is for the serialization):

  test_valid('@scope (.c <> .d)');

  test_valid('@scope (.a, .c <> .d)');

  test_valid('@scope (.a <> .b, .c)');

  test_valid('@scope (div::before)');

  test_valid('@scope (div::after)');

  test_valid('@scope (slotted(div))');

  test_valid('@scope (.a) to (div::before)');

  test_valid('@scope (> &) to (>>)');

  test_invalid('@scope div');

  test_invalid('@scope (.a) unknown (.c)');

  test_invalid('@scope (.a) to unknown (.c)');

  test_invalid('@scope (.a) 1px (.c)');

  test_invalid('@scope (.a) to unknown(c)');

  test_invalid('@scope unknown(.a)');

  test_invalid('@scope 1px');

  test_invalid('@scope creep');

  test_invalid('@scope )))');

  test_invalid('@scope (');

  test_invalid('@scope ( {}');

  test_invalid('@scope to');

  test_invalid('@scope }');

  test_invalid('@scope (.a');

  test_invalid('@scope (.a to (.b)');

  test_invalid('@scope ( to (.b)');

  test_invalid('@scope (.a) from (.c)');

</script>