ant-design-vue/components/_util/vnode.js

export function cloneVNode (vnode, deep) {
  const cloned = new vnode.constructor(
    vnode.tag,
    vnode.data,
    vnode.children,
    vnode.text,
    vnode.elm,
    vnode.context,
    vnode.componentOptions,
    vnode.asyncFactory
  )
  cloned.ns = vnode.ns
  cloned.isStatic = vnode.isStatic
  cloned.key = vnode.key
  cloned.isComment = vnode.isComment
  cloned.isCloned = true
  if (deep && vnode.children) {
    cloned.children = cloneVNodes(vnode.children)
  }
  return cloned
}

export function cloneVNodes (vnodes, deep) {
  const len = vnodes.length
  const res = new Array(len)
  for (let i = 0; i < len; i++) {
    res[i] = cloneVNode(vnodes[i], deep)
  }
  return res
}

export function cloneElement (node, nodeProps) {
  const { props, key, ref } = nodeProps
  if (node.componentOptions) {
    Object.assign(node.componentOptions.propsData, props)
  }
  const data = node.data || {}
  const { style = data.style,
    class: cls = data.class,
    attrs = data.attrs,
    on = data.on,
  } = nodeProps
  Object.assign(node.data, { style, attrs, class: cls, on })
  if (key !== undefined) {
    node.key = key
  }
  return node
}