Function getLeafNode

docs/external/js/react-dom.development.js:6785–6791

* Given any node return the first leaf node without children. * * @param {DOMElement|DOMTextNode} node * @return {DOMElement|DOMTextNode}

(node)

   */

  function getLeafNode(node) {
    while (node && node.firstChild) {
      node = node.firstChild;
    }

    return node;
  }
  /**
   * Get the next sibling within a container. This will walk up the
   * DOM if a node's siblings have been exhausted.