Detailed explanation of cookies to solve the problem that WeChat cannot store localStorage

When developing a Web page based on WeChat, we found that some models cannot store information in localStorage, or once the page is closed, the stored information becomes invalid. Use cookies to replace localStorage to store some simple data. 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, I hope it can help everyone.

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, valid for 365 days

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

Retrieval. If the cookie expires, it will return empty

##

getCookie('username');

After testing, it is fully compatible. No problem occurred.

Related recommendations:

HTML5 localStorage knowledge points summary

The difference between the functions cookies, sessionStorage and localStorage in php Department

A brief discussion on local storage of localStorage

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