Cookie.js

A tiny (1.24 KB gzipped), stand-alone JavaScript utility for managing cookies in the browser.

Usage

Add Cookie.min.js to your HTML document.

<script src="Cookie.min.js"></script>

API

Cookie.set()

Create a cookie (with no options):

Cookie.set('name', 'jon');

NOTE: If the option.expires value is not set, the cookie Expires / Max-Age is set to Session.

Create a cookie with an expiration date:

Cookie.set('name', 'jon', {
  expires: new Date('March 18, 2040')
});

Create a cookie that expires in 3 days:

Cookie.set('name', 'jon', {
  expires: 3
});

Create a cookie that can only be accessed by a specific path and domain:

Cookie.set('name', 'jon', {
  path: '/', // all pages
  domain: 'jonlabelle.com' // any subdomain of jonlabelle.com (including www)
});

Create a secure cookie:

Cookie.set('name', 'jon', {
  secure: true
});

NOTE: Setting the secure option to true ensures the cookie is always encrypted when transmitting from client to server.

Cookie.get()

Get a cookie accessible by the current page:

Cookie.get('name');

NOTE: Returns null if the cookie does NOT exist.

Cookie.exists()

Check if a cookie exists:

if (Cookie.exists('name')) {
  // do cool stuff here
}

Returns bool, true if the cookie exists, and false if it does not.

Cookie Value Types

Retrieve a cookie and convert the value to Number:

Cookie.set('age', 34);

var val = Cookie.get('age', Number);

if (typeof val === 'number') {
  console.log(val); // 34
}

Other native functions that convert values are Boolean and Date, or you can define your own conversion Function.

For example, to create a number from a hexadecimal code:

var value = Cookie.get('code', function (stringValue) {
  return parseInt(stringValue, 16);
});

Cookie.remove()

Delete a cookie:

Cookie.remove('name');

Delete a cookie specifying the domain:

Cookie.remove('info', {
  domain: 'jonlabelle.com'
});

Cookie.setSub()

Sub-cookies allow multiple values to be stored in a single cookie. A sub-cookie looks similar to a URL and takes the following form:

cookiename=name1=value1&name2=value2&name3=value3

Create a sub-cookie named person:

Cookie.setSub('person', 'name', 'jon');
Cookie.setSub('person', 'email', 'contact@jonlabelle.com');
Cookie.setSub('person', 'today', (new Date()).toString());

Create a sub-cookie with options:

Cookie.setSub('person', 'age', 75, { domain: 'jonlabelle.com', secure: true });

Create a sub-cookie from an Object:

var obj = {
  name: 'jon',
  email: 'labelle'
};

Cookie.setSubs('person', obj);

NOTE: Calls to Cookie.setSubs() will completely overwrite the cookie.

Cookie.getSub()

Get a sub-cookie:

Cookie.getSub('person', 'name');

Get a sub-cookie and convert the value to a Number:

Cookie.getSub('person', 'age', Number);

Cookie.getSubs()

Get a sub-cookie as a hash Object:

var obj = Cookie.getSubs('person');

if (typeof obj === 'object') {
  console.log(obj); // => Object { name: 'jon', email: '...'}
}

Cookie.removeSub()

Remove a sub-cookie:

Cookie.removeSub('person', 'name');

Cookie.enabled()

Check if cookies are enabled by the browser:

Cookie.enabled();

Returns bool, true if cookies are enabled, and false if they are not.

Cookie.clear()

Clears all cookies from the browser:

Cookie.clear();

Author

• Jon LaBelle

License

The MIT License (MIT)

Copyright (c) 2012-2014 Jon LaBelle

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.