) must be contained inside a parent

,
, or element.'; } public function getStandard(): WCAGStandard { return WCAGStandard::A; } public function getSeverity(): Severity { return Severity::ERROR; } public function getLevel(): int { return 2; } public function check(DOMElement $element): ?Violation { if (strtolower($element->tagName) !== 'li') { return null; } $parent = $element->parentNode; if (!$parent instanceof DOMElement) { return $this->createViolation( $element, $this->getDescription(), 'Wrap the orphan
1. element in a parent
   or
   tag.' ); } $parentTag = strtolower($parent->tagName); $validParents = ['ul', 'ol', 'menu']; if (!in_array($parentTag, $validParents, true) && strtolower($parent->getAttribute('role')) !== 'list') { return $this->createViolation( $element, $this->getDescription(), sprintf('Move the
   1. element inside a
      or
      container instead of <%s>.', $parentTag) ); } return null; } }