Action list

Every action, as data-next-action="<name>" and next.actions.<name>({ … }).

Action	Arguments	Events
`addItem`	`items` (`"1x2, 5"`), or `package_id` and `quantity`, or `selector_id` for its pick; `replace` empties the cart first	`cart.updated`, `cart.added`
`removeItem`	`package_id`	`cart.updated`, `cart.removed`
`setQuantity`	`quantity` (`"+1"`, `"-1"` or a number) and `package_id` or `selector_id`; `min_quantity`, `max_quantity`	`cart.updated` or `selector.updated`
`select`	`selector_id`, `option_id`	`selector.selected`
`selectVariant`	`code`, `value`, and the option, slot or line it changes; a `variants.<code>` row of `data-next-each` carries all of them	`cart.updated` for an option or line; `selector.updated` for a slot
`clear`	—	`cart.updated`, `cart.removed`
`applyCoupon`, `removeCoupon`	`code`	`coupon.applied`, `coupon.denied`, `coupon.removed`
`setShipping`	`shipping_id`	`shipping.selected`
`acceptUpsell`	`selector_id` or `items`: what the offer adds to the order (on a page opened with `?ref_id`)	`upsell.accepted`, `order.updated`
`skipUpsell`	the same	`upsell.skipped`
`go`	`url`	—

acceptUpsell is its own action because it charges the order; addItem on an order page fills a new cart.