(1)退出功能实现
在NavHeader.vue中:
<div class="topbar-user">
<a href="javascript:;" v-if="username">{
{username}}</a>
<a href="javascript:;" v-if="!username" @click="login">登录</a>
<a href="javascript:;" v-if="username" @click="logout">登录</a>
<a href="javascript:;" v-if="username">我的订单</a>
<a href="javascript:;" class="my-cart">
<span class="icon-cart" @click&