A user wants to have a customized experience for adding items to the cart.

To have a customized experience for adding items to the cart and also update the mini cart module, the requirement can be fulfilled by triggering the global “cartChange” event after the Add to Cart Action on thecustom button. This event will notify all the components that are listening to it that the cart has changed and they should refresh their data accordingly. The mini cart module is one of these components, so it will update its state based on the new cart data. Salesforce References: B2B Commerce and D2C Commerce Developer Guide, Events