z_element_plus/ssr-testing/cases/menu.vue

<template>
  <el-menu :default-active="activeIndex" class="el-menu-demo" mode="horizontal">
    <el-menu-item index="1">Processing Center</el-menu-item>
    <el-sub-menu index="2">
      <template #title>Workspace</template>
      <el-menu-item index="2-1">item one</el-menu-item>
    </el-sub-menu>
    <el-menu-item index="3" disabled>Info</el-menu-item>
    <el-menu-item index="4">Orders</el-menu-item>
  </el-menu>
</template>

<script lang="ts" setup>
import { ref } from 'vue'

const activeIndex = ref('1')
</script>