Function insertNodeAt

src/vuedraggable.js:19–25

(fatherNode, node, position)

}

function insertNodeAt(fatherNode, node, position) {
  const refNode =
    position === 0
      ? fatherNode.children[0]
      : fatherNode.children[position - 1].nextSibling;
  fatherNode.insertBefore(node, refNode);
}

function computeVmIndex(vnodes, element) {
  return vnodes.map(elt => elt.elm).indexOf(element);