Tag ="transition-group", vue3.2.33 Warning

[tujianglin]

[Vue warn]: children must be keyed.
Extraneous non-props attributes (class) were passed to component but could not be automatically inherited because component renders fragment or text root nodes.

[lhermann]

Same issue as #138 and #140

[liu-yan-liang]

使用 vuenextdraggable. fix it.
https://www.npmjs.com/package/vuenextdraggable
在使用 tag="transition-group" 的时候，需要至少两层 html 标签

<template #item="{ element }"> <div class="list-group-item"> <div>{{ element.name }}</div> </div> </template>