How do I set and unset a cookie using jQuery, for example create a cookie named test
and set the value to 1
?
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15 Answers
Update April 2019
jQuery isn't needed for cookie reading/manipulation, so don't use the original answer below.
Go to https://github.com/js-cookie/js-cookie instead, and use the library there that doesn't depend on jQuery.
Basic examples:
// Set a cookie
Cookies.set('name', 'value');
// Read the cookie
Cookies.get('name') => // => 'value'
See the docs on github for details.
Before April 2019 (old)
See the plugin:
https://github.com/carhartl/jquery-cookie
You can then do:
$.cookie("test", 1);
To delete:
$.removeCookie("test");
Additionally, to set a timeout of a certain number of days (10 here) on the cookie:
$.cookie("test", 1, { expires : 10 });
If the expires option is omitted, then the cookie becomes a session cookie and is deleted when the browser exits.
To cover all the options:
$.cookie("test", 1, {
expires : 10, // Expires in 10 days
path : '/', // The value of the path attribute of the cookie
// (Default: path of page that created the cookie).
domain : 'jquery.com', // The value of the domain attribute of the cookie
// (Default: domain of page that created the cookie).
secure : true // If set to true the secure attribute of the cookie
// will be set and the cookie transmission will
// require a secure protocol (defaults to false).
});
To read back the value of the cookie:
var cookieValue = $.cookie("test");
You may wish to specify the path parameter if the cookie was created on a different path to the current one:
var cookieValue = $.cookie("test", { path: '/foo' });
UPDATE (April 2015):
As stated in the comments below, the team that worked on the original plugin has removed the jQuery dependency in a new project (https://github.com/js-cookie/js-cookie) which has the same functionality and general syntax as the jQuery version. Apparently the original plugin isn't going anywhere though.
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There is no need to use jQuery particularly to manipulate cookies.
From QuirksMode (including escaping characters)
function createCookie(name, value, days) {
var expires;
if (days) {
var date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
expires = "; expires=" + date.toGMTString();
} else {
expires = "";
}
document.cookie = encodeURIComponent(name) + "=" + encodeURIComponent(value) + expires + "; path=/";
}
function readCookie(name) {
var nameEQ = encodeURIComponent(name) + "=";
var ca = document.cookie.split(';');
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) === ' ')
c = c.substring(1, c.length);
if (c.indexOf(nameEQ) === 0)
return decodeURIComponent(c.substring(nameEQ.length, c.length));
}
return null;
}
function eraseCookie(name) {
createCookie(name, "", -1);
}
Take a look at
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2Hi Russ, the good thing about jquery cookie is that it escapes the data – Svetoslav Marinov Jan 18 '11 at 14:49
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2@lordspace - Just wrap the value in window.escape/unescape to write/retrieve the cookie value, respectively :) – Russ Cam Jan 18 '11 at 18:03
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47Better cookie code can be found here: https://developer.mozilla.org/en/DOM/document.cookie – SDC Jul 11 '12 at 14:03
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JSHint complains that `expires` was already defined and `===` was not used to compare with `0` and `' '`. – Alex W Nov 26 '13 at 20:00
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5
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1instead of escape or unescape you can use encodeURI or decodeURI – Rodislav Moldovan Oct 25 '14 at 17:43
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1This solution is not going to work, `encodeURIComponent` can erroneously encode characters that are allowed in cookie-value or cookie-name according to the RFC 6265: https://github.com/js-cookie/js-cookie/pull/20#issuecomment-94453407. That can cause trouble for removing a cookie using third party solutions that expect some characters not to be encoded in the cookie-name. – Fagner Brack Apr 21 '15 at 18:05
<script type="text/javascript">
function setCookie(key, value, expiry) {
var expires = new Date();
expires.setTime(expires.getTime() + (expiry * 24 * 60 * 60 * 1000));
document.cookie = key + '=' + value + ';expires=' + expires.toUTCString();
}
function getCookie(key) {
var keyValue = document.cookie.match('(^|;) ?' + key + '=([^;]*)(;|$)');
return keyValue ? keyValue[2] : null;
}
function eraseCookie(key) {
var keyValue = getCookie(key);
setCookie(key, keyValue, '-1');
}
</script>
You can set the cookies as like
setCookie('test','1','1'); //(key,value,expiry in days)
You can get the cookies as like
getCookie('test');
And finally you can erase the cookies like this one
eraseCookie('test');
Hope it will helps to someone :)
EDIT:
If you want to set the cookie to all the path/page/directory then set path attribute to the cookie
function setCookie(key, value, expiry) {
var expires = new Date();
expires.setTime(expires.getTime() + (expiry * 24 * 60 * 60 * 1000));
document.cookie = key + '=' + value + ';path=/' + ';expires=' + expires.toUTCString();
}
Thanks, vicky
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160 * 1000 = 60 second 60* (60 * 1000) = 60 mins which is 1 hour 24* (60* (60 * 1000)) = 1 day which 24 hours Hope it helps. – Vignesh Pichamani Sep 30 '13 at 16:18
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11 * 24 * 60 * 60 * 1000 customize 1 for 1 day or u can do 365 – Vignesh Pichamani Sep 30 '13 at 16:20
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1This is not going to work in Safari or IE for any characters outside the ASCII range, such as `é`, `北`, etc. Also, this is not going to work for some special characters that are not allowed in the cookie-name or cookie-value. I recommend the following reference: http://tools.ietf.org/html/rfc6265 – Fagner Brack Apr 21 '15 at 18:14
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1
You can use a plugin available here..
https://plugins.jquery.com/cookie/
and then to write a cookie do
$.cookie("test", 1);
to access the set cookie do
$.cookie("test");
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Here is my global module I use -
var Cookie = {
Create: function (name, value, days) {
var expires = "";
if (days) {
var date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
expires = "; expires=" + date.toGMTString();
}
document.cookie = name + "=" + value + expires + "; path=/";
},
Read: function (name) {
var nameEQ = name + "=";
var ca = document.cookie.split(";");
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == " ") c = c.substring(1, c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
}
return null;
},
Erase: function (name) {
Cookie.create(name, "", -1);
}
};
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Make sure not to do something like this:
var a = $.cookie("cart").split(",");
Then, if the cookie doesn't exist, the debugger will return some unhelpful message like ".cookie not a function".
Always declare first, then do the split after checking for null. Like this:
var a = $.cookie("cart");
if (a != null) {
var aa = a.split(",");
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The sample code is not complete. Is it only a single `}` that is missing or are there several lines of code missing? – Peter Mortensen Jan 08 '18 at 12:59
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It's just a singe } missing, but obviously you will need to add more lines of code to continue what you want to do with the split. – user890332 Jan 09 '18 at 18:09
Here is how you set the cookie with JavaScript:
below code has been taken from https://www.w3schools.com/js/js_cookies.asp
function setCookie(cname, cvalue, exdays) { var d = new Date(); d.setTime(d.getTime() + (exdays*24*60*60*1000)); var expires = "expires="+ d.toUTCString(); document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/"; }
now you can get the cookie with below function:
function getCookie(cname) { var name = cname + "="; var decodedCookie = decodeURIComponent(document.cookie); var ca = decodedCookie.split(';'); for(var i = 0; i <ca.length; i++) { var c = ca[i]; while (c.charAt(0) == ' ') { c = c.substring(1); } if (c.indexOf(name) == 0) { return c.substring(name.length, c.length); } } return ""; }
And finally this is how you check the cookie:
function checkCookie() { var username = getCookie("username"); if (username != "") { alert("Welcome again " + username); } else { username = prompt("Please enter your name:", ""); if (username != "" && username != null) { setCookie("username", username, 365); } } }
If you want to delete the cookie just set the expires parameter to a passed date:
document.cookie = "username=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/;";
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A simple example of set cookie in your browser:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>jquery.cookie Test Suite</title>
<script src="jquery-1.9.0.min.js"></script>
<script src="jquery.cookie.js"></script>
<script src="JSON-js-master/json.js"></script>
<script src="JSON-js-master/json_parse.js"></script>
<script>
$(function() {
if ($.cookie('cookieStore')) {
var data=JSON.parse($.cookie("cookieStore"));
$('#name').text(data[0]);
$('#address').text(data[1]);
}
$('#submit').on('click', function(){
var storeData = new Array();
storeData[0] = $('#inputName').val();
storeData[1] = $('#inputAddress').val();
$.cookie("cookieStore", JSON.stringify(storeData));
var data=JSON.parse($.cookie("cookieStore"));
$('#name').text(data[0]);
$('#address').text(data[1]);
});
});
</script>
</head>
<body>
<label for="inputName">Name</label>
<br />
<input type="text" id="inputName">
<br />
<br />
<label for="inputAddress">Address</label>
<br />
<input type="text" id="inputAddress">
<br />
<br />
<input type="submit" id="submit" value="Submit" />
<hr>
<p id="name"></p>
<br />
<p id="address"></p>
<br />
<hr>
</body>
</html>
Simple just copy/paste and use this code for set your cookie.
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1Just a note, the browser by default cache the resources according to their filenames. In this example, `jquery-1.9.0.min.js` will be reloaded for everybody when the filename is updated to `jquery-1.9.1.min.js`, otherwise the browser will NOT make a request to the server at all to check for updated content. If you update the code inside `jquery.cookie.js` without changing it's filename, then it may NOT be reloaded in browsers that already cached the `jquery.cookie.js` resource. – Fagner Brack Apr 21 '15 at 18:01
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If you are writing a website and copying/pasting this, be aware that this is not going to work if you update `jquery.cookie.js` version without changing it's filename (unless your server deal with caching using E-Tags). – Fagner Brack Apr 21 '15 at 18:01
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if ($.cookie('cookieStore')) { var data=JSON.parse($.cookie("cookieStore")); // when load page in different page not found $('#name').text(data[0]); $('#address').text(data[1]); } – Mohammad Javad Jun 21 '18 at 06:19
You can use the library on Mozilla website here
You'll be able to set and get cookies like this
docCookies.setItem(name, value);
docCookies.getItem(name);
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I think Fresher gave us nice way, but there is a mistake:
<script type="text/javascript">
function setCookie(key, value) {
var expires = new Date();
expires.setTime(expires.getTime() + (value * 24 * 60 * 60 * 1000));
document.cookie = key + '=' + value + ';expires=' + expires.toUTCString();
}
function getCookie(key) {
var keyValue = document.cookie.match('(^|;) ?' + key + '=([^;]*)(;|$)');
return keyValue ? keyValue[2] : null;
}
</script>
You should add "value" near getTime(); otherwise the cookie will expire immediately :)
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2"value" could be a string. In the question he's using 1 as an example. Value should be what the key is equal to, not the length in days before the cookie expires. If value were passed in as "foo" your version would crash. – Peter Jun 03 '15 at 17:34
I thought Vignesh Pichamani's answer was the simplest and cleanest. Just adding to his the ability to set the number of days before expiration:
EDIT: also added 'never expires' option if no day number is set
function setCookie(key, value, days) {
var expires = new Date();
if (days) {
expires.setTime(expires.getTime() + (days * 24 * 60 * 60 * 1000));
document.cookie = key + '=' + value + ';expires=' + expires.toUTCString();
} else {
document.cookie = key + '=' + value + ';expires=Fri, 30 Dec 9999 23:59:59 GMT;';
}
}
function getCookie(key) {
var keyValue = document.cookie.match('(^|;) ?' + key + '=([^;]*)(;|$)');
return keyValue ? keyValue[2] : null;
}
Set the cookie:
setCookie('myData', 1, 30); // myData=1 for 30 days.
setCookie('myData', 1); // myData=1 'forever' (until the year 9999)
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I know there are many great answers. Often, I only need to read cookies and I do not want to create overhead by loading additional libraries or defining functions.
Here is how to read cookies in one line of javascript. I found the answer in Guilherme Rodrigues' blog article:
('; '+document.cookie).split('; '+key+'=').pop().split(';').shift()
This reads the cookie named key
, nice, clean and simple.
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Try (doc here, SO snippet not works so run this one)
document.cookie = "test=1" // set
document.cookie = "test=1;max-age=0" // unset
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The following code will remove all cookies within the current domain and all trailing subdomains (www.some.sub.domain.com
, .some.sub.domain.com
, .sub.domain.com
and so on.).
A single line vanilla JS version (no need for jQuery):
document.cookie.replace(/(?<=^|;).+?(?=\=|;|$)/g, name => location.hostname.split('.').reverse().reduce(domain => (domain=domain.replace(/^\.?[^.]+/, ''),document.cookie=`${name}=;max-age=0;path=/;domain=${domain}`,domain), location.hostname));
This is a readable version of this single line:
document.cookie.replace(
/(?<=^|;).+?(?=\=|;|$)/g,
name => location.hostname
.split(/\.(?=[^\.]+\.)/)
.reduceRight((acc, val, i, arr) => i ? arr[i]='.'+val+acc : (arr[i]='', arr), '')
.map(domain => document.cookie=`${name}=;max-age=0;path=/;domain=${domain}`)
);
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$.cookie("test", 1); //set cookie
$.cookie("test"); //get cookie
$.cookie('test', null); //delete cookie
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`if (typeof mytest === "undefined") { alert("cookie mytest not set") }` – cssyphus Jun 14 '13 at 20:21