Won’t show alert_container when adding product to cart via AJAX.

We’re coding our store in a way that when I add the last item to a cart, parts of the single template are reloaded via ajax and we want to show the alert_container in this reloaded part.

The thing is: shortcodes won’t work with ajax requests… So I needed to do this in my theme.

if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
    $output    = ob_get_clean();
    $shortcode = new WOO_Product_Stock_Alert_Shortcode();
    $output .= $shortcode->display_stock_alert_form( [ 'product_id' => $product->id ] );
    echo $output;
}

For the previous code work, i needed to change get_alert_form function (in class-woo-product-stock-alert-frontend.php)

function get_alert_form($attr) {
		global $WOO_Product_Stock_Alert, $product;

		if(is_null($product)){
			$product = wc_get_product( $attr['product_id'] );
		}
		if ( empty( $product ) ) return;
[...]

And pass the $attr param forward in class-woo-product-stock-shotcode-display-stock-alert-form.php:22

$WOO_Product_Stock_Alert->frontend->get_alert_form($attr);

Hope you can make this change in the production code.
Best regards