CartProvider
The CartProvider component creates a context for using a cart. It creates a cart object and callbacks
that can be accessed by any descendent component using the useCart hook and related hooks. It also carries out
any callback props when a relevant action is performed. For example, if a onLineAdd callback is provided,
then the callback will be called when a new line item is successfully added to the cart.
The CartProvider component must be a descendent of the ShopifyProvider component.
You must use this component if you want to use the useCart hook or related hooks, or if you would like to use the AddToCartButton component.
Required access scopes
Anchor link to section titled "Required access scopes"The CartProvider component requires the following Storefront API access scopes:
unauthenticated_read_customersunauthenticated_write_customers
Example code
Anchor link to section titled "Example code"
| Name | Type | Description |
|---|---|---|
| children | React.ReactNode |
Any ReactNode elements. |
| data? | Cart |
An object with fields that correspond to the Storefront API's Cart object. |
| cartFragment | string |
A fragment used to query the Storefront API's Cart object for all queries and mutations. A default value is used if no argument is provided. |
| numCartLines? | number |
A callback that is invoked when the process to create a cart begins, but before the cart is created in the Storefront API. |
| onCreate? | () => void |
A callback that is invoked when the process to create a cart begins, but before the cart is created in the Storefront API. |
| onLineAdd? | () => void |
A callback that is invoked when the process to add a line item to the cart begins, but before the line item is added to the Storefront API. |
| onLineRemove? | () => void |
A callback that is invoked when the process to remove a line item to the cart begins, but before the line item is removed from the Storefront API. |
| onLineUpdate? | () => void |
A callback that is invoked when the process to update a line item in the cart begins, but before the line item is updated in the Storefront API. |
| onNoteUpdate? | () => void |
A callback that is invoked when the process to add or update a note in the cart begins, but before the note is added or updated in the Storefront API. |
| onBuyerIdentityUpdate? | () => void |
A callback that is invoked when the process to update the buyer identity begins, but before the buyer identity is updated in the Storefront API. |
| onAttributesUpdate? | () => void |
A callback that is invoked when the process to update the cart attributes begins, but before the attributes are updated in the Storefront API. |
| onDiscountCodesUpdate? | () => void |
A callback that is invoked when the process to update the cart discount codes begins, but before the discount codes are updated in the Storefront API. |
| customerAccessToken? | CartBuyerIdentityInput['customerAccessToken'] |
The token that identifies the user that's logged in. This is necessary to associate the cart to an authenticated user. |
| countryCode? | CountryCode |
The ISO country code for i18n. |
Cart fragment
Anchor link to section titled "Cart fragment"You can provide the cartFragment prop to CartProvider to customize the fields requested from the Storefront API's Cart object for every query and mutation made by CartProvider.
The fragment must use the name CartFragment because it's referenced that way in each of the queries and mutations. If you provide a custom cartFragment, then it must be a raw string. For GraphQL syntax highlighting, you should use the gql utility exported from @shopify/hydrogen instead of graphql-tag because the latter returns an ASTNode instead of a string.
If you don't provide a cartFragment argument, then the following default value is used:
Component type
Anchor link to section titled "Component type"The CartProvider component is a client component, which means that it renders on the client. For more information about component types, refer to React Server Components.