Using the "Updated Single" event in Favorites

favorites-updated-single-event.js

/**
* favorites-updated-single
* Fires after a favorite button has been submitted successfully
* @param favorites - Array of post objects the user has favorited
* @param post_id - The post ID that was updated
* @param site_id - The site ID for the post that was updated (for multisite)
* @param status - Whether the button was active or inactive
*/
$(document).on('favorites-updated-single', function(event, favorites, post_id, site_id, status){
 // Do stuff here as needed. 
});