# checkoutLineItemsUpdate - storefront - MUTATION
Version: 2024-04

## Description
Updates line items on a checkout.

### Access Scopes
`unauthenticated_write_checkouts` access scope.


## Arguments
* [checkoutId](/docs/api/storefront/2024-04/scalars/ID): ID! - The checkout on which to update line items.
* [lineItems](/docs/api/storefront/2024-04/input-objects/CheckoutLineItemUpdateInput): CheckoutLineItemUpdateInput! - Line items to update.

The input must not contain more than `250` values.


## Returns
* [checkout](/docs/api/storefront/2024-04/objects/Checkout): Checkout The updated checkout object.
* [checkoutUserErrors](/docs/api/storefront/2024-04/objects/CheckoutUserError): CheckoutUserError! The list of errors that occurred from executing the mutation.
* [userErrors](/docs/api/storefront/2024-04/objects/UserError): UserError! The list of errors that occurred from executing the mutation.


## Examples