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Cookies in javascript

Demo and code for how to Add and Read values from cookies using javascript

by Athil

Posted on 01 Jan 0001 Category: Javascript Views: 2170

Cookies are the values that are stored in the Web browser memory,  here I am going to show how to add, read values from cookies.


Adding values to cookies

 document.cookie = "cookiename=" + value;

Where 'cookiename' is the name of cookie and value the variable that having value to add in cookie.

Reading values from cookies

   var CookieName = "cookiename=";
   var DecodedCookie = decodeURIComponent(document.cookie);
   if (DecodedCookie != null) {
      var CookieArray = DecodedCookie.split(';');
      for (var i = 0; i < CookieArray.length; i++) {
          var c = CookieArray[i];
          while (c.charAt(0) == ' ') {
              c = c.substring(1);
          if (c.indexOf(CookieName) == 0) {
              alert(c.substring(CookieName.length, c.length));
    else {
        alert('No cookie exist!');

Where 'cookiename' is the name of cookies and taking all cookies and splitting all cookies and matching the name of cookie you are given and taking the value.

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