css/css-values/ident-function-parsing.html

<!DOCTYPE html>
<title>CSS Values: The ident() Function (parsing)</title>
<link rel="help" href="https://drafts.csswg.org/css-values-5/#ident">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
<script>
  // Any property that accepts <custom-ident> will do.
  let prop = 'view-transition-name';

  // ident() is an arbitrary substitution function, so only its argument grammar is validated at parse
  // time: ident( <declaration-value> ). The argument is parsed as <ident-arg>+ at computed-value time.
  // https://github.com/w3c/csswg-drafts/issues/14213
  test_invalid_value(prop, 'ident()');
  test_invalid_value(prop, 'ident( )');
  test_invalid_value(prop, 'ident({})');
  test_invalid_value(prop, 'ident(a, b)');

  // Not an <ident-arg>+, so these are valid here and invalid at computed-value time.
  test_valid_value(prop, 'ident(rgb(1, 2, 3))');
  test_valid_value(prop, 'ident(5px)');

  // The argument round-trips as specified, with no whitespace normalization.
  test_valid_value(prop, 'ident(myident)');
  test_valid_value(prop, 'ident( myident)');
  test_valid_value(prop, 'ident(myident )');
  test_valid_value(prop, 'ident("myident")');
  test_valid_value(prop, 'ident("myident" 3)');
  test_valid_value(prop, 'ident(3 "myident")');
  test_valid_value(prop, 'ident("my" "ident")');
  test_valid_value(prop, 'ident(my "ident")');
  test_valid_value(prop, 'ident("my" ident)');
  test_valid_value(prop, 'ident(my ident)');
  test_valid_value(prop, 'ident(-- myident)');
  test_valid_value(prop, 'ident(my 3 3 3 3 ident)')

  // Check for support in specific properties (WIP):
  let ident = 'ident("myident" 42)';

  // https://drafts.csswg.org/css-view-transitions/#view-transition-name-prop
  test_valid_value('view-transition-name', ident);
</script>