Gabor

Would You like to create an upsell popup for WooCoomerce, when the customer clicks to the “Add to cart” button? You don’t need to buy any kind of plugins to do it. In this post I’m going to show you how to code the functionality to boost your sales in WooCommerce.

You can place and style any kind of upsell content in this popup:

1) Create a file named custom.js in your theme

2) Paste this snippet in the functions.php to enqueue the jQuery modal

// =============================================================
// ENQUEUE SCRIPTS FOR JQUERY MODAL
// =============================================================
function storefront_enqueue_style() {
    wp_enqueue_style('modal_css', '//cdnjs.cloudflare.com/ajax/libs/jquery-modal/0.9.1/jquery.modal.min.css', false);
}
add_action( 'wp_enqueue_scripts', 'storefront_enqueue_style' );
 
function storefront_enqueue_script() {
    wp_enqueue_script('custom_js', get_stylesheet_directory_uri() .'/assets/js/custom.js', false);
    wp_enqueue_script('modal_jquery', '//cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.min.js', false);
    wp_enqueue_script('modal_js', '//cdnjs.cloudflare.com/ajax/libs/jquery-modal/0.9.1/jquery.modal.min.js', false);
}
add_action( 'wp_enqueue_scripts', 'storefront_enqueue_script' );

3) Create a file named modal.php in your theme folder to build the content of the modal.

// =============================================================
// INCLUDE MODAL CONTENT IN STOREFRONT FOOTER AND EXCLUDE THE UPSELL PRODUCT
// =============================================================
function add_modal_to_storefront_footer(){
    global $product;
    //EXCLUDE THE ID OF YOUR UPSELL PRODUCT
    if( $product->id == 12 ){
        echo '';
    }else{
        include('templates/modal.php');
    }
}
add_action('storefront_before_footer', 'add_modal_to_storefront_footer');

4) Finally here’s the jquery snippet – paste it in the custom.js file

 jQuery(document).ready(function() {
  jQuery('body').on('click', '.add_to_cart_button, .single_add_to_cart_button', function(event) {
	  var form = jQuery(this).closest("form");
	  var data = form.serialize();
	  var object = objectifyForm(form.serializeArray());
	  var url = form.attr("action");
	  
	  jQuery.ajax({
		  type: "POST",
		  url: url,
		  data: data,		  
		});
		
	if (object.product_id > 0 ) {  
		jQuery(this)
	      jQuery("#upsell").modal("show");
	      jQuery("#upsell").modal({
	          fadeDuration: 200
	        });
	            return false;
        }
        console.log("No modal");

  });
});

function objectifyForm(formArray) {

  var returnArray = {};
  for (var i = 0; i < formArray.length; i++){
    returnArray[formArray[i]['name']] = formArray[i]['value'];
  }
  return returnArray;
}

Would like to upsell specific product in your WooCommerce store?

This code adds a checkbox before the “Place order” button on the checkout page

Paste this snippet to functions.php and set the $product_id value

// Display a custom checkout field
add_action( 'woocommerce_checkout_before_terms_and_conditions', 'custom_checkbox_checkout_field' );
function custom_checkbox_checkout_field() {
    $value = WC()->session->get('add_a_product');

    woocommerce_form_field( 'cb_add_product', array(
        'type'          => 'checkbox',
        'label'         => '  ' . __('Add specific product to your order'),
        'class'         => array('form-row-wide'),
    ), $value == 'yes' ? true : false );
}


// The jQuery Ajax request
add_action( 'wp_footer', 'checkout_custom_jquery_script' );
function checkout_custom_jquery_script() {
    // Only checkout page
    if( is_checkout() && ! is_wc_endpoint_url() ):

    // Remove "ship_different" custom WC session on load
    if( WC()->session->get('add_a_product') ){
        WC()->session->__unset('add_a_product');
    }
    if( WC()->session->get('product_added_key') ){
        WC()->session->__unset('product_added_key');
    }
    // jQuery Ajax code
    ?>
    <script type="text/javascript">
    jQuery( function($){
        if (typeof wc_checkout_params === 'undefined')
            return false;

        $('form.checkout').on( 'change', '#cb_add_product', function(){
            var value = $(this).prop('checked') === true ? 'yes' : 'no';

            $.ajax({
                type: 'POST',
                url: wc_checkout_params.ajax_url,
                data: {
                    'action': 'add_a_product',
                    'add_a_product': value,
                },
                success: function (result) {
                    $('body').trigger('update_checkout');
                    console.log(result);
                }
            });
        });
    });
    </script>
    <?php
    endif;
}

// The WordPress Ajax PHP receiver
add_action( 'wp_ajax_add_a_product', 'checkout_ajax_add_a_product' );
add_action( 'wp_ajax_nopriv_add_a_product', 'checkout_ajax_add_a_product' );
function checkout_ajax_add_a_product() {
    if ( isset($_POST['add_a_product']) ){
        WC()->session->set('add_a_product', esc_attr($_POST['add_a_product']));
        echo $_POST['add_a_product'];
    }
    die();
}

// Add remove free product
add_action( 'woocommerce_before_calculate_totals', 'adding_removing_specific_product' );
function adding_removing_specific_product( $cart ) {
    if (is_admin() && !defined('DOING_AJAX'))
        return;

    if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;

    // HERE the specific Product ID
    $product_id = 70;

    if( WC()->session->get('add_a_product') == 'yes' && ! WC()->session->get('product_added_key') )
    {
        $cart_item_key = $cart->add_to_cart( $product_id );
        WC()->session->set('product_added_key', $cart_item_key);
    }
    elseif( WC()->session->get('add_a_product') == 'no' && WC()->session->get('product_added_key') )
    {
        $cart_item_key = WC()->session->get('product_added_key');
        $cart->remove_cart_item( $cart_item_key );
        WC()->session->__unset('product_added_key');
    }
}