Shortcode to add a especific product to cart to any place without reload page - Woocommerce

functions.php

<?php
/* Create a Shorcode for custom_ajax_add_to_cart_button to add a Woocommerce Subscription button add to cart to any place*/
if (!function_exists('custom_ajax_add_to_cart_button') && class_exists('WooCommerce')) {
    function custom_ajax_add_to_cart_button($atts)
    {
        // Shortcode attributes
        $atts = shortcode_atts(array(
            'id' => '0', // Product ID
            'qty' => '1', // Product quantity
            'text' => '', // Text of the button
            'class' => '', // Additional classes
        ), $atts, 'ajax_add_to_cart');

        if (esc_attr($atts['id']) == 0) {
            return;
        }
        // Exit when no Product ID

        if (get_post_type(esc_attr($atts['id'])) != 'product') {
            return;
        }
        // Exit if not a Product

        $product = wc_get_product(esc_attr($atts['id']));

        if (!$product) {
            return;
        }
        // Exit when if not a valid Product

        $classes = implode(' ', array_filter(array(
            'button',
            'product_type_' . $product->get_type(),
            $product->is_purchasable() && $product->is_in_stock() ? 'add_to_cart_button' : '',
            $product->supports('ajax_add_to_cart') ? 'ajax_add_to_cart' : '',
        ))) . ' ' . $atts['class'];

        $add_to_cart_button = sprintf('<a rel="nofollow" href="%s" %s %s %s class="%s">%s</a>',
            esc_url($product->add_to_cart_url()),
            'data-quantity="' . esc_attr($atts['qty']) . '"',
            'data-product_id="' . esc_attr($atts['id']) . '"',
            'data-product_sku="' . esc_attr($product->get_sku()) . '"',
            esc_attr(isset($classes) ? $classes : 'button'),
            esc_html(empty(esc_attr($atts['text'])) ? $product->add_to_cart_text() : esc_attr($atts['text']))
        );

        return $add_to_cart_button;
    }
    add_shortcode('ajax_add_to_cart', 'custom_ajax_add_to_cart_button');
}

/*
 * Use of Shorcode 
 * echo do_shortcode("[ajax_add_to_cart id='THE ID OF YOUR PRODUCT OR SUBSCRIPTION' text='¡Try the Subscription Standard!' qty='1' class='']");
 */
?>