vue init webpack itemname

npm run dev

npm i element-ui -S

import ElementUI from 'element-ui'
import 'element-ui/lib/theme-chalk/index.css'
Vue.use(ElementUI)

<template>
  <el-menu
   :default-active="activeIndex2"
   class="el-menu-demo"
   mode="horizontal"
   @select="handleSelect"
   background-color="#545c64"
   text-color="#fff"
   active-text-color="#ffd04b">
   <el-menu-item index="1">處理中心</el-menu-item>
   <el-submenu index="2">
    <template slot="title">我的工作臺</template>
    <el-menu-item index="2-1">選項1</el-menu-item>
    <el-menu-item index="2-2">選項2</el-menu-item>
    <el-menu-item index="2-3">選項3</el-menu-item>
   </el-submenu>
   <el-menu-item index="3"><a  target="_blank">訂單管理</a></el-menu-item>
  </el-menu>
</template>

<script>
 export default {
  data() {
   return {
    activeIndex: '1',
    activeIndex2: '1'
   };
  },
  methods: {
   handleSelect(key, keyPath) {
    console.log(key, keyPath);
   }
  }
 }
</script>

<template>
 <div id="app">
  <Header></Header>
 </div>
</template>

<script>
import Header from './pages/header.vue'

export default {
 components:{
  Header,
 }
}
</script>

<style>

</style>