@ou-imdt/utils/lib/composedParent.js

Utility library for interactive media development

/**
 * Finds the composed parent of a node considering Shadow DOM.
 * @param {Node} node - The node for which to find the composed parent.
 * @returns {Node|null} The composed parent node or `null` if no parent exists.
 */
export default function composedParent(node) {
  if (node instanceof HTMLElement && node.assignedSlot) return node.assignedSlot;
  if (node instanceof ShadowRoot) return node.host;
  return node.parentNode;
}