Thêm nút tăng giảm số lượng sản phẩm woocommerce WordPress

function chowordpress_custom_quantity_field_archive()
{
    global $product;
    if ($product->is_type('simple')) {
        echo '<div class="chowordpress-custom--qty_wrap">';
        echo '<div class="chowordpress-qtv--wrap">';
        woocommerce_quantity_input(array('min_value' => 1, 'max_value' => $product->backorders_allowed() ? '' : $product->get_stock_quantity()));
        echo '</div>';
        woocommerce_template_loop_add_to_cart();
        echo '</div>';
    }
}
add_action('woocommerce_after_shop_loop_item', 'chowordpress_custom_quantity_field_archive', 15, 9);

// Chia sẻ bởi: https://chowordpress.com

function chowordpress_custom_add_to_cart_quantity_handler()
{
    wc_enqueue_js('
jQuery( "body" ).on( "click", ".quantity input", function() {
return false;
});
jQuery( "body" ).on( "change input", ".quantity .qty", function() {
var add_to_cart_button = jQuery( this ).parents( ".product" ).find( ".add_to_cart_button" );
add_to_cart_button.attr( "data-quantity", jQuery( this ).val() );
add_to_cart_button.attr( "href", "?add-to-cart=" + add_to_cart_button.attr( "data-product_id" ) + "&quantity=" + jQuery( this ).val() );
});
');
}
add_action('init', 'chowordpress_custom_add_to_cart_quantity_handler');