<script lang="ts" setup="props">
  import HelloWorld from './components/HelloWorld.vue'
</script>
<template>
  <HelloWorld/>
</template>
import HelloWorld
import HelloWorld
'HelloWorld' is declared but its value is never read.Vetur(6133)
Module '"/Volumes/Work/Vue3/x-ui/src/components/HelloWorld.vue"' has no default export.Vetur(1192)
    
vetur是一个vscode插件，用于为.vue单文件组件提供代码高亮以及语法支持
    
再继续翻，找到了个issue：issue 其中有下面这段话：
    
If you take a look at how Evan recently responded about the recommended approach going forward, it seems that volar is currently the extension of choice for vue 3.
    
那既然官方推荐 _volar_那肯定要去看下，简单的说volar是vetur的升级版本，提供了更牛叉的功能并有更好的TS支持。
    
选择卸载vetur，安装volar插件
    
于是……，世界都清爽了好多
    
最后，记得重启下VS Code
                        Vue3，setup的使用需要搭配return进行使用，Vue3中带setup的script的标签和不带能不能合并到一起，export default不能放到setup里会报错，script
                    
Vue3，setup的使用需要搭配return进行使用，Vue3中带setup的script的标签和不带能不能合并到一起，export default不能放到setup里会报错，script
                                爱你三千遍斯塔克
                        Vue报错 Invalid default value for prop “list“: Props with type Object/Array must use a factory
                    
Vue报错 Invalid default value for prop “list“: Props with type Object/Array must use a factory
                        升级echarts v5.0以后vue项目报错“export ‘default‘ (imported as ‘echarts‘) was not found in ‘echarts‘
                    
升级echarts v5.0以后vue项目报错“export ‘default‘ (imported as ‘echarts‘) was not found in ‘echarts‘
                                你挚爱的强哥
                        [Vue Router warn]: Component “default“ in record with path “/xx“ is a function that does not return
                    
[Vue Router warn]: Component “default“ in record with path “/xx“ is a function that does not return