# convertkit/2.4.3/resources/frontend/js/convertkit.js

Kit (formerly ConvertKit) – Email Newsletter, Email Marketing, Membership, Subscribers and Landing Pages, version 2.4.3. 301 lines.

- Page: https://pluginprobe.com/plugins/convertkit/2.4.3/code/resources/frontend/js/convertkit.js
- Raw: https://pluginprobe.com/plugins/convertkit/2.4.3/raw/resources/frontend/js/convertkit.js
- Modified: 2024-01-22T13:33:12+00:00

Line numbers below start at 1. Link to a line or a range by appending a fragment to the
page URL, for example `https://pluginprobe.com/plugins/convertkit/2.4.3/code/resources/frontend/js/convertkit.js#L10-L20`.

```javascript
/**
 * Frontend functionality for subscribers and tags.
 *
 * @since   1.9.6
 *
 * @package ConvertKit
 * @author ConvertKit
 */

/**
 * Tags the given subscriber ID with the given tag
 *
 * @since   1.9.6
 *
 * @param   int     subscriber_id   Subscriber ID
 * @param   string  tag             Tag
 * @param   int     post_id         WordPress Post ID
 */
function convertKitTagSubscriber( subscriber_id, tag, post_id ) {

	if ( convertkit.debug ) {
		console.log( 'convertKitTagSubscriber' );
		console.log( convertkit );
		console.log( subscriber_id );
		console.log( tag );
		console.log( post_id );
	}

	fetch(
		convertkit.ajaxurl,
		{
			method: 'POST',
			headers: {
				'Content-Type': 'application/x-www-form-urlencoded',
			},
			body: new URLSearchParams(
				{
					action: 'convertkit_tag_subscriber',
					convertkit_nonce: convertkit.nonce,
					subscriber_id: subscriber_id,
					tag: tag,
					post_id: post_id,
				}
			)
		}
	)
	.then(
		function ( response ) {
			if ( convertkit.debug ) {
				console.log( response );
			}

			return response.json();
		}
	)
	.then(
		function ( result ) {
			if ( convertkit.debug ) {
				console.log( result );
			}

			convertKitRemoveSubscriberIDFromURL( window.location.href );
		}
	)
	.catch(
		function ( error ) {
			if ( convertkit.debug ) {
				console.error( error );
			}

			convertKitRemoveSubscriberIDFromURL( window.location.href );
		}
	);

}

/**
 * Gets the subscriber ID for the given email address, storing
 * it in the `ck_subscriber_id` cookie if it exists.
 *
 * Typically called when the user completes a ConvertKit Form
 * that has either "Auto-confirm new subscribers" or
 * "Send subscriber to thank you page" enabled (both scenarios
 * include a ck_subscriber_id).
 *
 * @since   1.9.6
 *
 * @param   int  id   Subscriber ID
 */
function convertStoreSubscriberIDInCookie( subscriber_id ) {

	if ( convertkit.debug ) {
		console.log( 'convertStoreSubscriberIDInCookie' );
		console.log( subscriber_id );
	}

	fetch(
		convertkit.ajaxurl,
		{
			method: 'POST',
			headers: {
				'Content-Type': 'application/x-www-form-urlencoded',
			},
			body: new URLSearchParams(
				{
					action: 'convertkit_store_subscriber_id_in_cookie',
					convertkit_nonce: convertkit.nonce,
					subscriber_id: subscriber_id
				}
			)
		}
	)
	.then(
		function ( response ) {
			if ( convertkit.debug ) {
				console.log( response );
			}

			return response.json();
		}
	)
	.then(
		function ( result ) {
			if ( convertkit.debug ) {
				console.log( result );
			}

			convertKitRemoveSubscriberIDFromURL( window.location.href );
		}
	)
	.catch(
		function ( error ) {
			if ( convertkit.debug ) {
				console.error( error );
			}

			convertKitRemoveSubscriberIDFromURL( window.location.href );
		}
	);

}

/**
 * Gets the subscriber ID for the given email address, storing
 * it in the `ck_subscriber_id` cookie if it exists.
 *
 * Typically called when the user completes a ConvertKit Form
 * that has either "Auto-confirm new subscribers" or
 * "Send subscriber to thank you page" enabled (both scenarios
 * include a ck_subscriber_id).
 *
 * @since   1.9.6
 *
 * @param   string  emailAddress   Email Address
 */
function convertStoreSubscriberEmailAsIDInCookie( emailAddress ) {

	if ( convertkit.debug ) {
		console.log( 'convertStoreSubscriberEmailAsIDInCookie' );
		console.log( emailAddress );
	}

	fetch(
		convertkit.ajaxurl,
		{
			method: 'POST',
			headers: {
				'Content-Type': 'application/x-www-form-urlencoded',
			},
			body: new URLSearchParams(
				{
					action: 'convertkit_store_subscriber_email_as_id_in_cookie',
					convertkit_nonce: convertkit.nonce,
					email: emailAddress
				}
			)
		}
	)
	.then(
		function ( response ) {
			if ( convertkit.debug ) {
				console.log( response );
			}
		}
	)
	.then(
		function ( result ) {
			if ( convertkit.debug ) {
				console.log( result );
			}
		}
	)
	.catch(
		function ( error ) {
			if ( convertkit.debug ) {
				console.error( error );
			}
		}
	);

}

/**
 * Remove the url subscriber_id url param
 *
 * The 'ck_subscriber_id' should only be set on URLs included on
 * links from a ConvertKit email with no other URL parameters.
 * This function removes the parameters so a customer won't share
 * a URL with their subscriber ID in it.
 *
 * @param url
 */
function convertKitRemoveSubscriberIDFromURL( url ) {

	var clean_url = url.substring( 0, url.indexOf( "?ck_subscriber_id" ) );
	var title     = document.getElementsByTagName( "title" )[0].innerHTML;
	if ( clean_url ) {
		window.history.pushState( null, title, clean_url );
	}

}

/**
 * Utility function to pause for the given number of milliseconds
 *
 * @since   1.9.6
 *
 * @param   int     milliseconds
 */
function convertKitSleep( milliseconds ) {

	var start = new Date().getTime();
	for (var i = 0; i < 1e7; i++) {
		if ((new Date().getTime() - start) > milliseconds) {
			break;
		}
	}

}

/**
 * Register events
 */
document.addEventListener(
	'DOMContentLoaded',
	function () {

		if ( convertkit.subscriber_id > 0 && convertkit.tag && convertkit.post_id ) {
			// If the user can be detected as a ConvertKit Subscriber (i.e. their Subscriber ID is in a cookie or the URL),
			// and the Page/Post they are viewing has a Tag specified, subscribe them to the tag.
			convertKitTagSubscriber( convertkit.subscriber_id, convertkit.tag, convertkit.post_id );
		} else if ( convertkit.subscriber_id > 0 ) {
			// If the user can be detected as a ConvertKit Subscriber (i.e. their Subscriber ID is in a cookie or the URL),
			// update the cookie now.
			convertStoreSubscriberIDInCookie( convertkit.subscriber_id );
		}

		// Store subscriber ID as a cookie from the email address used when a ConvertKit Form is submitted.
		document.addEventListener(
			'click',
			function (e) {
				// Check if the form submit button was clicked, or the span element was clicked and its parent is the form submit button.
				if ( ! e.target.matches( '.formkit-submit' ) && ! e.target.parentElement.matches( '.formkit-submit' ) ) {
					if ( convertkit.debug ) {
						console.log( 'not a ck form' );
					}

					return;
				}

				// Get email address.
				let emailAddress = document.querySelector( 'input[name="email_address"]' ).value;

				// If the email address is empty, don't attempt to get the subscriber ID by email.
				if ( ! emailAddress.length ) {
					if ( convertkit.debug ) {
						console.log( 'email empty' );
					}

					return;
				}

				// If the email address is invalid, don't attempt to get the subscriber ID by email.
				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,}))$/;
				if ( ! validator.test( emailAddress.toLowerCase() ) ) {
					if ( convertkit.debug ) {
						console.log( 'email not an email address' );
					}

					return;
				}

				// Wait a moment before sending the AJAX request.
				convertKitSleep( 2000 );
				convertStoreSubscriberEmailAsIDInCookie( emailAddress );
			}
		);

	}
);

```