vue3 vuedraggable draggable element must have an item slot

vue3+vite
看官网使用这种<template #item=“{ element }”>

<draggable
  v-model="myArray"
  @start="onStart"
  @end="onEnd"
  :sort="false"
  item-key="id"
  draggable=".item"
  handle=".mover"
>
  <template #item="{ element }">
    <div> {{ element.name }} </div>
  </template>
</draggable>

实战可看这篇