Home > widget-integration > CartDrawerRecommendationController > handleAddToCart

CartDrawerRecommendationController.handleAddToCart() method

Handles adding a product to cart from recommendation widget.

Optimization: Does NOT re-fetch recommendation API after add to cart. - If product has 0-1 variants: hides the product from widget (DOM only) - If all products are hidden: re-fetches API to get new recommendations - If product has 2+ variants: keeps it visible for user to add other variants

Signature:

protected handleAddToCart(productId: string, variantId: string, buttonElement: HTMLElement): Promise<void>;

Parameters

Returns:

Promise<void>

Example

Override to add custom validation or quantity logic before adding to cart:

window.boostWidgetIntegration.extend('CartDrawerRecommendationController', (Base) => {
  return class extends Base {
    async handleAddToCart(productId, variantId, buttonElement) {
      // Example: add custom quantity or properties
      const quantity = this.getCustomQuantity(productId);
      if (quantity > 0) {
        await super.handleAddToCart(productId, variantId, buttonElement);
      }
    }
  };
});