关于前端设置cookie

 1 function setcookie(name,value){
 2   var days = 1;
 3   var exp = new Date();
 4   //写入Cookie  ，toGMTstring将时间转换成字符串。
 5   document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString;
 6 }
 7 
 8 function getcookie(name){
 9   var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
10   if(arr=document.cookie.match(reg)){
11     return (arr[2]);
12   }else{
13     return null;
14   }
15 }
16 
17 let seen = true;
18 let noseen = false;
19 
20 if(getcookie(‘login‘)!==null){
21   seen = false;
22   noseen = true;
23 }