%s', esc_url( $product->add_to_cart_url() ), esc_attr( isset( $quantity ) ? $quantity : 1 ), esc_attr( $product->id ), esc_attr( $product->get_sku() ), // TODO: load add to cart button class from customizer? // esc_attr( isset( $class ) ? $class : 'button' ), esc_html( $product->add_to_cart_text() ) ), $product );