一、初始化项目

$ vue init webpack vue-elementui

$ npm run dev

二、安装 elementUI

$ npm i element-ui -S

三、引入elementUI

在main.js中引入elementUI

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

四、测试

新建header.vue文件，复制一段elementUI的代码

<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">处理中心</el-menu-item>
  <el-submenu index="2">
    <template slot="title">我的工作台</template>
    <el-menu-item index="2-1">选项1</el-menu-item>
    <el-menu-item index="2-2">选项2</el-menu-item>
    <el-menu-item index="2-3">选项3</el-menu-item>
    <el-submenu index="2-4">
      <template slot="title">选项4</template>
      <el-menu-item index="2-4-1">选项1</el-menu-item>
      <el-menu-item index="2-4-2">选项2</el-menu-item>
      <el-menu-item index="2-4-3">选项3</el-menu-item>
    </el-submenu>
  </el-submenu>
  <el-menu-item index="3" disabled>消息中心</el-menu-item>
  <el-menu-item index="4"><a href="https://www.ele.me" target="_blank">订单管理</a></el-menu-item>
</el-menu>

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

在App.vue中引入header.vue

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

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

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

<style>

</style>