How to use cookies to solve the problem that WeChat localStorage cannot be stored

This article mainly introduces the use of cookies to solve the problem that WeChat cannot store localStorage. Code examples are provided here, friends in need can refer to them

When developing a Web page based on WeChat, it was found that some models cannot store information in localStorage, or once the page is closed, the stored information will not be stored. failed.

Use cookies to replace localStorage to store some simple data. I searched online and found that w3school already has a good solution.

Set cookie:

function setCookie(c_name,value,expiredays)
{
var exdate=new Date()
exdate.setDate(exdate.getDate()+expiredays)
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate.toGMTString())
}

//取回cookie
function getCookie(c_name)
{
if (document.cookie.length>0)
 {
 c_start=document.cookie.indexOf(c_name + "=")
 if (c_start!=-1)
 { 
 c_start=c_start + c_name.length+1 
 c_end=document.cookie.indexOf(";",c_start)
 if (c_end==-1) c_end=document.cookie.length
 return unescape(document.cookie.substring(c_start,c_end))
 } 
 }
return ""
}

Example:

Set cookie , the validity period is 365 days

setCookie('username','123',365);

Retrieval, if the cookie expires, it will return empty

getCookie('username');

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