Vue CLI：The template root requires exactly one element

在 Vue CLI 開發中，新建模板文件如下所示：

<template>
    
</template>

<script>
  export default {
    name: 'T'
  }
</script>

<style scoped>

</style>

後會出現如下錯誤信息： 

 ERROR  Failed to compile with 1 errors                              12:53:34 PM

 error  in ./src/views/test/Query.vue

Module Error (from ./node_modules/eslint-loader/index.js):

/src/views/test/Query.vue
  1:1  error  The template root requires exactly one element  vue/valid-template-root

✖ 1 problem (1 error, 0 warnings)


 @ ./src/routes/inner.js 25:9-35
 @ ./src/routes/index.js
 @ ./src/plugins/router.js
 @ ./src/main.js
 @ multi (webpack)-dev-server/client?http://127.0.0.1:8080/sockjs-node (webpack)/hot/dev-server.js ./src/main.js

解決辦法，需在 <template> 下添加一個任意元素。