ajax将后端数据保存到本地前端

在前后端分离中，如何辨别用户和判断用户是否登录需要token或者cookie的验证来判断用户的时效性，将后端返回的标识数据保存到本地，每次请求后端都携带该数据以此来分别用户

【ajax将后端数据保存到本地】https://www.cnblogs.com/monsterooo/p/6815392.html

$.ajax({ type:'post', url:'http://127.0.0.1:5000/login', cache: false, data:{ 'username':name, 'pwd':pwd, },//重点必须为一个变量如：data contentType: "application/x-www-form-urlencoded; charset=utf-8", success:function(data){ if(data['status']=='2'){ alert(data['errmsg']) }if(data['status']=='1'){ alert(data['errmsg']) }if(data['status']=='0'){ localStorage.setItem('sessions',data['session_id']); //保存到本地以sessions为key console.log(localStorage.sessions) window.location.href = https://www.it610.com/article/data['errmsg']; } } })

在其他网页直接localStorage.sessions即可获取以sessions为名的data