https://www.baberuthcentral.com/wp-content/plugins/what-would-seth-godin-do/jquery.cookie.js

1/*jslint browser: true */ /*global jQuery: true */
2
3/**
4 * jQuery Cookie plugin
5 *
6 * Copyright (c) 2010 Klaus Hartl (stilbuero.de)
7 * Dual licensed under the MIT and GPL licenses:
8 * http://www.opensource.org/licenses/mit-license.php
9 * http://www.gnu.org/licenses/gpl.html
10 *
11 */
12
13// TODO JsDoc
14
15/**
16 * Create a cookie with the given key and value and other optional parameters.
17 *
18 * @example $.cookie('the_cookie', 'the_value');
19 * @desc Set the value of a cookie.
20 * @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secure: true });
21 * @desc Create a cookie with all available options.
22 * @example $.cookie('the_cookie', 'the_value');
23 * @desc Create a session cookie.
24 * @example $.cookie('the_cookie', null);
25 * @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
26 *       used when the cookie was set.
27 *
28 * @param String key The key of the cookie.
29 * @param String value The value of the cookie.
30 * @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
31 * @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
32 *                             If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
33 *                             If set to null or omitted, the cookie will be a session cookie and will not be retained
34 *                             when the the browser exits.
35 * @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
36 * @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
37 * @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
38 *                        require a secure protocol (like HTTPS).
39 * @type undefined
40 *
41 * @name $.cookie
42 * @cat Plugins/Cookie
43 * @author Klaus Hartl/[email protected]
44 */
45
46/**
47 * Get the value of a cookie with the given key.
48 *
49 * @example $.cookie('the_cookie');
50 * @desc Get the value of a cookie.
51 *
52 * @param String key The key of the cookie.
53 * @return The value of the cookie.
54 * @type String
55 *
56 * @name $.cookie
57 * @cat Plugins/Cookie
58 * @author Klaus Hartl/[email protected]
59 */
60jQuery.cookie = function (key, value, options) {
61    
62    // key and at least value given, set cookie...
63    if (arguments.length > 1 && String(value) !== "[object Object]") {
64        options = jQuery.extend({}, options);
65
66        if (value === null || value === undefined) {
67            options.expires = -1;
68        }
69
70        if (typeof options.expires === 'number') {
71            var days = options.expires, t = options.expires = new Date();
72            t.setDate(t.getDate() + days);
73        }
74        
75        value = String(value);
76        
77        return (document.cookie = [
78            encodeURIComponent(key), '=',
79            options.raw ? value : encodeURIComponent(value),
80            options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
81            options.path ? '; path=' + options.path : '',
82            options.domain ? '; domain=' + options.domain : '',
83            options.secure ? '; secure' : ''
84        ].join(''));
85    }
86
87    // key and possibly options given, get cookie...
88    options = value || {};
89    var result, decode = options.raw ? function (s) { return s; } : decodeURIComponent;
90    return (result = new RegExp('(?:^|; )' + encodeURIComponent(key) + '=([^;]*)').exec(document.cookie)) ? decode(result[1]) : null;
91};