1.安装--然后在src/main.js中 导入 和  使用
2修改：common/sidebar.vue ,page/ echarts.vue , router/index.js , src/main.js
3sidebar.vue
 

<template>
    <div class="sidebar">
        <el-menu
            class="sidebar-el-menu"
            :default-active="onRoutes"
            :collapse="collapse"
            background-color="#324157"
            text-color="#bfcbd9"
            active-text-color="#20a0ff"
            unique-opened
            router
        >
            <template v-for="item in items">
                <template v-if="item.subs">
<!--                    一级菜单-->
                    <el-submenu :index="item.index" :key="item.index">
                        <template slot="title">
                            <i :class="item.icon"></i>
                            <span slot="title">{
  { item.title }}</span>
                        </template>
                        <template v-for="subItem in item.subs">
                            <el-submenu
                                v-if="subItem.subs"
                                :index="subItem.index"
                                :key="subItem.index"
                            >
                                <template slot="title"><i :class="subItem.icon"></i>{
  { subItem.title }}</template>
<!--                                二级菜单-->
                                <el-menu-item
                                    v-for="(threeItem,i) in subItem.subs"
                                    :key="i"
                                    :index="threeItem.index"
                                ><i :class="threeItem.icon"></i>{
  { threeItem.title }}</el-menu-item>
                            </el-submenu>
                            <!-- :key="subItem.index" 删掉的39行 -->
                            <el-menu-item
                                v-else
                                :index="subItem.index"
                                
                            ><i :class="subItem.icon"></i>{
  { subItem.title }}</el-menu-item>
                        </template>
                    </el-submenu>
                </template>
                <template v-else>
                    <el-menu-item :index="item.index" :key="item.index">
                        <i :class="item.icon"></i>
                        <span slot="title">{
  { item.title }}</span>
                    </el-menu-item>
                </template>
            </template>
        </el-menu>
    </div>
</template>

<script>
import bus from '../common/bus';
export default {
    data() {
        return {
            collapse: false,
            items:[],
            //管理员菜单userType=0
            itemList3: [
                {
                    "id":4,
                    "pid":1,
                    "icon":"el-icon-s-order",
                    "index":"3",
                    "title":"统一管理",
                    "subs":[
                        {
                            "id":9,
                            "pid":4,
                            "icon":"el-icon-plus",
                            "index":"user",
                            "title":"用户管理",
                            "subs":null
                        },
                        {