The i18n internationalization of element-ui is introduced into

vue. The code is as follows:

import zhCNLocale from "element-ui/lib/locale/lang/zh-CN"
export default {
    ...zhCNLocale,
    next: "",
    submit: "",

but keep reporting errors

Module parse failed: Unexpected token (5:1)
You may need an appropriate loader to handle this file type.
|
| export default {
|       ...zhCNLocale,
|       next: "",
|       submit: "",

 @ ./src/providers/lang-provider.js 4:0-48
 @ ./src/main.js
 @ multi (webpack)-dev-server/client?http://localhost:8080 webpack/hot/dev-server ./src/main.js

Excuse me, what is the reason for this?