//挂载路由navigationguard//作为路由对象，在每个navigationguard之前添加//用户未登录，直接通过url访问，许亚重新导航到登录页面exportdefaultrouter//到，路径待访问//from，从xx路径跳转//next()方next('/login')强制跳转router.beforeEach((to,from,next)=>{//访问登录页面--直接释放//eslint-disable-next-lineeqeqeqif(to.path=='/login')returnnext()//获取tokenconsttokenStr=window.sessionStorage.getItem('token')//判断是否有一个令牌if(!tokenStr)returnnext('/login')next()})
