Vue的导航栏和布局

el-menu标签里面加上：router=true和
el-submenu里面的el-menu-item里面加上index="/你的路径名称"相当于rounter-link to的功能，也就是路由跳转的功能

这个是用弹性布局display:flex实现的

相关的代码：

<template>
    <section>
        <div id="app" style="width: 100%;height: 60px; background-color:#B3C0D1;color: #333; line-height: 20px; align-content: center;">
            <h2>我的课程系统</h2>
      
        <!-- display:flex 为弹性布局 -->
    <div style="display:flex;width:100%;height:100%;border:1px solid #eee">
    <div style="width:20%;border:#0000EE 1px solid;">
        <el-aside width= "100%" style="background-color::rgb(238 241,246)" >
            <el-menu :router=true :default-active="$route.name" unique-opened="false">
                <el-submenu index="1">
                    <template slot="title"><i class="el-icon-chicken"></i>
                    班级管理 </template>
                    <el-menu-item-group>
                        <el-menu-item index="/clz/add">班级添加</el-menu-item>
                        <el-menu-item index="clz/list">班级列表</el-menu-item>
                        <el-menu-item index="clz/update">班级修改</el-menu-item>
                    </el-menu-item-group>
                    <!-- 测试:router=true 加上index 和router-link的区别  -->
  <!-- <el-menu-item-group>
                    <template slot="title">用户管理</template>
                    <el-menu-item index="1-1"><router-link to="/shapan/tuanyi"> </router-link>列表</el-menu-item>
                    <el-menu-item index="/login"><router-link to="/shapan/login"></router-link> 添加</el-menu-item>
                </el-menu-item-group> -->
                </el-submenu>
              
 
                <el-submenu index="2">
                    <template slot="title"> <i class="el-icon-coin"></i>课程</template>
                    <el-menu-item index="course/add">课程添加</el-menu-item>
                    <el-menu-item index="course/list">课程列表</el-menu-item>
                </el-submenu>

            </el-menu>

        </el-aside>



    </div>
    
    
    <div style="width:80%;border:#00193A 1px solid;"></div>

      <router-view></router-view>
    </div>
  </div>

    </section>
</template>
<script>


</script>


//  完全的去除相当于css样式
<style>
 #app {
      
      
    font-family: Avenir, Arial, Helvetica, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-align: left;
    color: #2c3e50;
    margin-top: 1px;
    /* 弹性布局 */
    display: flex;
    flex-direction: column;
    height: 100%;


}
    
</style>