<template>
  <div id="app">
    <router-link to="/index">首页</router-link>
    <router-link to="/course">课程</router-link>
    <router-link to="/manage">管理</router-link>
    
    <div v-if="$store.state.token">
      <a>{{$store.state.username}}</a>
      <a @click="logout">注销</a>
    </div>
    <div v-else >
      <router-link to="/register">注册</router-link>
      <router-link to="/login">登录</router-link>
    </div>
    <router-view/>
  </div>
</template>