// LifterLMS

    $( '.llms-checkout input' ).blur(function() {

        // Validate email
        var email = $('input#email_address').val();

        if( didSend == false && regex.test( email ) == true && $('input#first_name').val() && $('input#last_name').val() ) {
            didSend = true; // prevent it from sending twice.

            var data = {
                'action'     : 'wpf_abandoned_cart',
                'first_name' : $('input#first_name').val(),
                'last_name'  : $('input#last_name').val(),
                'user_email' : $('input#email_address').val(),
                'source'     : 'lifterlms',
            }

            $.post(wpf_ac_data.ajaxurl, data);

        }

    });