https://justinbridges.com/wp-content/plugins/convertkit/resources/frontend/js/convertkit.js?ver=2.5.6

1/**
2 * Frontend functionality for subscribers and tags.
3 *
4 * @since   1.9.6
5 *
6 * @package ConvertKit
7 * @author ConvertKit
8 */
9
10/**
11 * Gets the subscriber ID for the given email address, storing
12 * it in the `ck_subscriber_id` cookie if it exists.
13 *
14 * Typically called when the user completes a ConvertKit Form
15 * that has either "Auto-confirm new subscribers" or
16 * "Send subscriber to thank you page" enabled (both scenarios
17 * include a ck_subscriber_id).
18 *
19 * @since   1.9.6
20 *
21 * @param   int  id   Subscriber ID
22 */
23function convertStoreSubscriberIDInCookie( subscriber_id ) {
24
25	if ( convertkit.debug ) {
26		console.log( 'convertStoreSubscriberIDInCookie' );
27		console.log( subscriber_id );
28	}
29
30	fetch(
31		convertkit.ajaxurl,
32		{
33			method: 'POST',
34			headers: {
35				'Content-Type': 'application/x-www-form-urlencoded',
36			},
37			body: new URLSearchParams(
38				{
39					action: 'convertkit_store_subscriber_id_in_cookie',
40					convertkit_nonce: convertkit.nonce,
41					subscriber_id: subscriber_id
42				}
43			)
44		}
45	)
46	.then(
47		function ( response ) {
48			if ( convertkit.debug ) {
49				console.log( response );
50			}
51
52			return response.json();
53		}
54	)
55	.then(
56		function ( result ) {
57			if ( convertkit.debug ) {
58				console.log( result );
59			}
60
61			convertKitRemoveSubscriberIDFromURL( window.location.href );
62		}
63	)
64	.catch(
65		function ( error ) {
66			if ( convertkit.debug ) {
67				console.error( error );
68			}
69
70			convertKitRemoveSubscriberIDFromURL( window.location.href );
71		}
72	);
73
74}
75
76/**
77 * Gets the subscriber ID for the given email address, storing
78 * it in the `ck_subscriber_id` cookie if it exists.
79 *
80 * Typically called when the user completes a ConvertKit Form
81 * that has either "Auto-confirm new subscribers" or
82 * "Send subscriber to thank you page" enabled (both scenarios
83 * include a ck_subscriber_id).
84 *
85 * @since   1.9.6
86 *
87 * @param   string  emailAddress   Email Address
88 */
89function convertStoreSubscriberEmailAsIDInCookie( emailAddress ) {
90
91	if ( convertkit.debug ) {
92		console.log( 'convertStoreSubscriberEmailAsIDInCookie' );
93		console.log( emailAddress );
94	}
95
96	fetch(
97		convertkit.ajaxurl,
98		{
99			method: 'POST',
100			headers: {
101				'Content-Type': 'application/x-www-form-urlencoded',
102			},
103			body: new URLSearchParams(
104				{
105					action: 'convertkit_store_subscriber_email_as_id_in_cookie',
106					convertkit_nonce: convertkit.nonce,
107					email: emailAddress
108				}
109			)
110		}
111	)
112	.then(
113		function ( response ) {
114			if ( convertkit.debug ) {
115				console.log( response );
116			}
117		}
118	)
119	.then(
120		function ( result ) {
121			if ( convertkit.debug ) {
122				console.log( result );
123			}
124		}
125	)
126	.catch(
127		function ( error ) {
128			if ( convertkit.debug ) {
129				console.error( error );
130			}
131		}
132	);
133
134}
135
136/**
137 * Remove the url subscriber_id url param
138 *
139 * The 'ck_subscriber_id' should only be set on URLs included on
140 * links from a ConvertKit email with no other URL parameters.
141 * This function removes the parameters so a customer won't share
142 * a URL with their subscriber ID in it.
143 *
144 * @param url
145 */
146function convertKitRemoveSubscriberIDFromURL( url ) {
147
148	var clean_url = url.substring( 0, url.indexOf( "?ck_subscriber_id" ) );
149	var title     = document.getElementsByTagName( "title" )[0].innerHTML;
150	if ( clean_url ) {
151		window.history.pushState( null, title, clean_url );
152	}
153
154}
155
156/**
157 * Utility function to pause for the given number of milliseconds
158 *
159 * @since   1.9.6
160 *
161 * @param   int     milliseconds
162 */
163function convertKitSleep( milliseconds ) {
164
165	var start = new Date().getTime();
166	for (var i = 0; i < 1e7; i++) {
167		if ((new Date().getTime() - start) > milliseconds) {
168			break;
169		}
170	}
171
172}
173
174/**
175 * Register events
176 */
177document.addEventListener(
178	'DOMContentLoaded',
179	function () {
180
181		if ( convertkit.subscriber_id > 0 ) {
182			// If the user can be detected as a ConvertKit Subscriber (i.e. their Subscriber ID is in a cookie or the URL),
183			// update the cookie now.
184			convertStoreSubscriberIDInCookie( convertkit.subscriber_id );
185		}
186
187		// Store subscriber ID as a cookie from the email address used when a ConvertKit Form is submitted.
188		document.addEventListener(
189			'click',
190			function (e) {
191				// Check if the form submit button was clicked, or the span element was clicked and its parent is the form submit button.
192				if ( ! e.target.matches( '.formkit-submit' ) && ! e.target.parentElement.matches( '.formkit-submit' ) ) {
193					if ( convertkit.debug ) {
194						console.log( 'not a ck form' );
195					}
196
197					return;
198				}
199
200				// Get email address.
201				let emailAddress = document.querySelector( 'input[name="email_address"]' ).value;
202
203				// If the email address is empty, don't attempt to get the subscriber ID by email.
204				if ( ! emailAddress.length ) {
205					if ( convertkit.debug ) {
206						console.log( 'email empty' );
207					}
208
209					return;
210				}
211

212				// If the email address is invalid, don't attempt to get the subscriber ID by email.
213				var validator = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
214				if ( ! validator.test( emailAddress.toLowerCase() ) ) {
215					if ( convertkit.debug ) {
216						console.log( 'email not an email address' );
217					}
218
219					return;
220				}
221
222				// Wait a moment before sending the AJAX request.
223				convertKitSleep( 2000 );
224				convertStoreSubscriberEmailAsIDInCookie( emailAddress );
225			}
226		);
227
228	}
229);