错误提示

[vue-language-server] Elements in iteration expect to have 'v-bind:key' directives.
Renders the element or template block multiple times based on the source data

解决

在v-for 后添加 :key=‘item’

<li v-for="i in list" :key="i">

<div class="item" v-for="(user,index) in datalist" :key='index' >

原因

Vue 2.2.0+的版本里，当在组件中使用v-for时，key是必须的

参考文献

https://www.cnblogs.com/zdz8207/p/vue-for-v-bind-key.html

https://blog.csdn.net/qq_43540219/article/details/107615142