How to redirect straight to Cart/Checkout on “Add to cart” (single-item cart) an

-- HikaShop version -- : 6.0.0
-- Joomla version -- : 5.3.3
-- PHP version -- : 8.2.28

Hi HikaShop team,

Goal
On my site each cart must contain only one product and one unit. When a user clicks “Add to cart” from a product listing or product page, I want to:

Immediately redirect to the Cart/Checkout page (skip the add-to-cart popup/notification), and

If there is already a product in the cart, replace it with the newly selected product (so the cart always keeps just that single item).

Ideally, I’d like to do this without the HikaShop Cart Notification plugin (no popup).

Environment

Joomla: 5.x

HikaShop: 6.0.x (Business)

PHP: 8.x

Template: Helix Ultimate (if relevant)

What I’ve tried

I found discussions about the Cart Notification plugin, but my goal is to redirect directly to the cart/checkout instead of showing a popup.

I can enforce a single product by clearing the cart before adding the new one via an override/custom code (e.g., customizing add_to_cart_ajax.php), but I’d prefer an official setting/hook or a recommended approach that survives updates.

Looked for a config like “After add to cart → go to checkout/cart” but I’m not sure if there is a built-in option in HikaShop 6.0.x to force the redirect site-wide.

Questions

Is there a built-in setting to make “Add to cart” redirect directly to the cart/checkout (no popup/notice), both from product listings and product pages? If yes, where exactly is it in HikaShop 6.0.x?

What’s the recommended way to ensure the cart always contains only one item (qty=1) and to replace any existing item when adding a new one?

Is there a core event/plugin hook (e.g., onBeforeCartSave, onBeforeAddToCart, etc.) we should use to empty the cart before adding the new product?

Or a configuration that enforces single-item carts globally?

If there’s no built-in redirect, is there a supported pattern (override or system plugin) to:

Clear the cart, add the selected product, then redirect to the cart/checkout URL,

And keep this behavior working for both AJAX and non-AJAX add-to-cart?

Desired UX (summary)

User clicks “Add to cart” → existing cart (if any) is cleared → new product (qty=1) is added → user is redirected straight to the cart/checkout.

If you can share the proper settings path, the recommended event hooks, or a short example for HikaShop 6.0.x, that would be perfect. Thanks a lot!

Best,
David