admin/src/components/LangSelect/index.vue

<script setup>
// 组件
import { useI18n } from 'vue-i18n'
import { useAppStore } from '@/store/modules/app'

const appStore = useAppStore()
const { locale } = useI18n()

function handleLanguageChange(lang) {
  locale.value = lang
  appStore.changeLanguage(lang)
  if (lang === 'en-us') {
    ElMessage.success('Switch Language Successful!')
  } else {
    ElMessage.success('切换语言成功！')
  }
}
</script>

<template>
  <el-dropdown trigger="click" @command="handleLanguageChange">
    <div>
      <SvgIcon icon-class="language"></SvgIcon>
    </div>
    <template #dropdown>
      <el-dropdown-menu>
        <el-dropdown-item :disabled="appStore.language === 'zh-cn'" command="zh-cn">中文</el-dropdown-item>
        <el-dropdown-item :disabled="appStore.language === 'en-us'" command="en-us"> English</el-dropdown-item>
      </el-dropdown-menu>
    </template>
  </el-dropdown>
</template>