The difference and usage of cookie/sessionstorage/localstorage

difference betweenLocal cookies can be used across browsers, and can be set for expiration, and can be used across labels. Sessionstorage only for single page storage data localstorage used to permanently save data same Point

are used to store data. Usage Cookies

JS Operation Cookie Method! 
    Write cookies function Setcookie (name,value) {var days = 30; 
    var exp = new Date (); 
    Exp.settime (Exp.gettime () + days*24*60*60*1000); 
Document.cookie = name + "=" + Escape (value) + "expires=" + exp.togmtstring (); //Read cookies function GetCookie (name) {var arr,reg=new RegExp ("(^|)" +name+ "= ([^;]

    *)(;|$)"); 
    if (Arr=document.cookie.match (reg)) return unescape (arr[2]); 
else return null; 
    //Delete the cookie function Delcookie (name) {var exp = new Date (); 
    Exp.settime (Exp.gettime ()-1); 
    var cval=getcookie (name); 
if (cval!=null) document.cookie= name + "=" +cval+ "; expires=" +exp.togmtstring (); 
//Use sample Setcookie ("name", "Hayden"); 

Alert (GetCookie ("name")); 


If you need to set the custom expiration//Then replace the above Setcookie function with the following two functions on OK; 
    Program code function Setcookie (name,value,time) {var strsec = getsec (time); 
    var exp = new Date (); 
    Exp.settime (Exp.gettime () + strsec*1); Document.cookie = name + "="+ Escape (value) +"; expires= "+ exp.togmtstring (); 
   function Getsec (str) {alert (str); 
   var str1=str.substring (1,str.length) *1; 
   var str2=str.substring (0,1); 
   if (str2== "s") {return str1*1000; 
   else if (str2== "H") {return str1*60*60*1000; 
   else if (str2== "D") {return str1*24*60*60*1000; }//This is an example of a set expiration time://S20 is representative of 20 seconds//h refers to hours, such as 12 hours is: H12//d is the number of days, 30 days: D30 Setcookie ("name", "Hayden", "S20");

Sessionstorage and Localstorage

To determine whether the browser supports Localstorage, you can use the following code:

if (window.localstorage) { 
    alert ("Browse support Localstorage") 
 }else{    
    Alert ("Browse temporarily does not support Localstorage") 
  } 
  //or 
if (typeof window.localstorage = = ' undefined ') {     
  alert (" Browse temporarily does not support Localstorage ") 
}
Sessionstorage.setitem (" Key "," value ");     Localstorage.setitem ("Site", "js8.in");

Sessionstorage.getitem ("key");  Localstorage.getitem ("site");

Sessionstorage.removeitem ("key");   Localstorage.removeitem ("site");
Remove all
sessionstorage.clear ();
Localstorage.clear ();