狂神说Vue di 子路由嵌套代码

自己在vue网站根据狂神的写的 基本应该一致
main.vue

<template>
  <el-container style="height: 500px; border: 1px solid #eee">
    <el-aside width="200px" style="background-color: rgb(238, 241, 246)">
      <el-menu :default-openeds="['1', '3']">
        <el-submenu index="1">
          <template slot="title">
            <i class="el-icon-message"></i>用户管理
          </template>
          <el-menu-item-group>           
            <el-menu-item index="1-1">
                <router-link to="/user/profile">个人信息</router-link>
            </el-menu-item>
            <el-menu-item index="1-2">
                <router-link to="/user/list">用户列表</router-link>
            </el-menu-item>
          </el-menu-item-group>
        </el-submenu>
        <el-submenu index="2">
          <template slot="title">
            <i class="el-icon-menu"></i>内容管理
          </template>
          <el-menu-item-group>
            <el-menu-item index="2-1">分类管理</el-menu-item>
            <el-menu-item index="2-2">内容列表</el-menu-item>
          </el-menu-item-group>
        </el-submenu>
    
      </el-menu>
    </el-aside>

    <el-container>
      <el-header style="text-align: right; font-size: 12px">
        <el-dropdown>
          <i class="el-icon-setting" style="margin-right: 15px"></i>
          <el-dropdown-menu slot="dropdown">
            <el-dropdown-item>个人信息</el-dropdown-item>
            <el-dropdown-item>退出登录</el-dropdown-item>            
          </el-dropdown-menu>
        </el-dropdown>
      </el-header>

      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<style>
.el-header {
  background-color: #b3c0d1;
  color: #333;
  line-height: 60px;
}

.el-aside {
  color: #333;
}
</style>

<script>
export default {
  data() {
    const item = {
      date: "2016-05-02",
      name: "王小虎",
      address: "上海市普陀区金沙江路 1518 弄"
    };
    return {
      tableData: Array(20).fill(item)
    };
  }
};
</script>