https://element-plus.org/#/en-US/component/menu
@import url("//unpkg.com/element-plus/lib/theme-chalk/index.css");
<el-menu :default-active="activeIndex" class="el-menu-demo" mode="horizontal" @select="handleSelect">
<el-menu-item index="1">Processing Center</el-menu-item>
<el-submenu index="2">
<template #title>Workspace</template>
<el-menu-item index="2-1">item one</el-menu-item>