How to read and write cookies with Javascript
Reads and writes cookies
document.cookie
property allows you to read,
add to, and update the cookies associated with the document.
Example
<!DOCTYPE HTML>
<html>
<body>
<script>
var cookieCount = 0;
//read Cookies<!--from ww w . ja va 2s .c o m-->
document.writeln(document.cookie);
//create Cookie
cookieCount++;
document.cookie = "Cookie_" + cookieCount + "=Value_" + cookieCount;
//read Cookies
document.writeln(document.cookie);
//update Cookie
document.cookie = "Cookie_" + cookieCount + "=Updated_" + cookieCount;
//read Cookies
document.writeln(document.cookie);
</script>
</body>
</html>
Additional cookie fields
The additional fields that can be added to a cookie
| Addition | Description |
|---|---|
| path=<path> | cookie path; default to the path of the current document if not specified. |
| domain=<domain> | cookie domain; defaults to the domain of the current document if not specified. |
| max-age=<seconds> | the life of the cookie in terms of the number of seconds. |
| expires=<date> | Sets the life of the cookie using a GMT-format date. |
| secure | The cookie will be sent only over a secure (HTTPS) connection. |
Each of these additional items is prepended to the name/value pair and separated with a semicolon:
document.cookie = "MyCookie=MyValue;max-age=10";