1、按需导入时如何进行组件库语言切换：

<template><el-config-provider :locale="zhCn"><el-table :data="tableData" style="width: 100%">
...</el-table></el-config-provider>
</template><script lang="ts" setup>
import zhCn from "element-plus/es/locale/lang/zh-cn";
</script><style scoped></style>

<template><el-config-provider :locale="zhCn">
其它组件...</el-config-provider>
</template><script lang="ts" setup>
import zhCn from "element-plus/es/locale/lang/zh-cn";
</script><style scoped></style>

2、如何在原生js中按需使用element-plus：

*.js

import { ElMessage } from 'element-plus';
import 'element-plus/theme-chalk/el-message.css'function fn(){ElMessage({message: '无数据',type: 'error'});
}export default fn;