当npm install下项目后 新建vue 参照原型写页面时 出现这个问题Cannot use v-for on stateful component root element because it renders multiple elem ents
才发现原来 template内层进行嵌套div时 如果使用v-for循环 此div外还需要嵌套一个div 要不然渲染不了 如图：
解决方案：
1.在v-for的div外再嵌套一个div就ok了
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