Check if dom node is contained in parent node

isInParent.js

/**
 * Determines if html element is
 * contained within other html element
 *
 * @param {HTMLElement} refNode
 * @param {HTMLElement} otherNode
 */
const isParent = (refNode, otherNode) => {
  var parent = otherNode.parentNode;
  do {
    if (refNode == parent) {
      return true;
    } else {
      parent = parent.parentNode;
    }
  } while (parent);
  return false;
};