您可以直接在代码中调查WooCommerce如何通过Ajax将商品添加到购物车中
includes/class-wc-ajax.php。回调位于。WooCommerce已经在产品“循环”（产品档案）上执行了此操作，因此我认为您不需要重新发明轮子，并且如果它们的现有代码对您要执行的操作无效，那么您应该可以借用从中
该文件的开头具有所有WooCommerce Ajax操作的循环，但是我们可以追踪到添加到购物车基本上是这样的：
add_action( 'wp_ajax_nopriv_woocommerce_add_to_cart', array( 'WC_AJAX', 'add_to_cart' ) );
它的回调距离文件更远：
public static function add_to_cart() { ob_start(); $product_id = apply_filters( 'woocommerce_add_to_cart_product_id', absint( $_POST['product_id'] ) ); $quantity = empty( $_POST['quantity'] ) ? 1 : wc_stock_amount( $_POST['quantity'] ); $passed_validation = apply_filters( 'woocommerce_add_to_cart_validation', true, $product_id, $quantity, $variation_id, $variations, $cart_item_data ); if ( $passed_validation && WC()->cart->add_to_cart( $product_id, $quantity ) ) { do_action( 'woocommerce_ajax_added_to_cart', $product_id ); if ( get_option( 'woocommerce_cart_redirect_after_add' ) == 'yes' ) { wc_add_to_cart_message( $product_id ); } // Return fragments self::get_refreshed_fragments(); } else { // If there was an error adding to the cart, redirect to the product page to show any errors $data = array( 'error' => true, 'product_url' => apply_filters( 'woocommerce_cart_redirect_after_error', get_permalink( $product_id ), $product_id ) ); wp_send_json( $data ); } die();}如果要查看其添加到购物车ajax调用，则该JS位于
assest/js/frontend/add-to-cart.js。
编辑
现在，我知道您正在寻找添加变体的方法， 也许 我们可以对以上内容进行调整。
首先，我认为您需要将AJAX网址传递给脚本：
wp_enqueue_script( 'wc-variation-add-to-cart', 'source-to-script/your-script.js' );$vars = array( 'ajax_url' => admin_url( 'admin-ajax.php' ) );wp_localize_script( 'wc-variation-add-to-cart', 'WC_VARIATION_ADD_TO_CART', $vars );
然后，您的AJAX调用将如下所示：
jQuery.ajax({ url: WC_VARIATION_ADD_TO_CART.ajax_url, data: { "action" : "woocommerce_add_variation_to_cart", "product_id" : "124", "variation_id" : "125", "quantity" : 1, "variation" : { "size" : "xl", "color": "pink" }, }, type: "POST"});基本上，要添加特定的变体，除了所有特定选项外，还需要变体的ID。
最后，针对
woocommerce_add_variation_to_cartajax操作的新回调将遵循以下内容：
add_action( 'wp_ajax_nopriv_woocommerce_add_variation_to_cart', 'so_27270880_add_variation_to_cart' );function so_27270880_add_variation_to_cart() { ob_start(); $product_id = apply_filters( 'woocommerce_add_to_cart_product_id', absint( $_POST['product_id'] ) ); $quantity = empty( $_POST['quantity'] ) ? 1 : wc_stock_amount( $_POST['quantity'] ); $variation_id = isset( $_POST['variation_id'] ) ? absint( $_POST['variation_id'] ) : ''; $variations = ! empty( $_POST['variation'] ) ? (array) $_POST['variation'] : ''; $passed_validation = apply_filters( 'woocommerce_add_to_cart_validation', true, $product_id, $quantity, $variation_id, $variations, $cart_item_data ); if ( $passed_validation && WC()->cart->add_to_cart( $product_id, $quantity, $variation_id, $variations ) ) { do_action( 'woocommerce_ajax_added_to_cart', $product_id ); if ( get_option( 'woocommerce_cart_redirect_after_add' ) == 'yes' ) { wc_add_to_cart_message( $product_id ); } // Return fragments WC_AJAX::get_refreshed_fragments(); } else { // If there was an error adding to the cart, redirect to the product page to show any errors $data = array( 'error' => true, 'product_url' => apply_filters( 'woocommerce_cart_redirect_after_error', get_permalink( $product_id ), $product_id ) ); wp_send_json( $data ); } die();}通常，我只是复制WooCommerce的方法，并添加添加变体所需的2个变量。完全未经测试，但希望对您有所帮助。
