---
title: Changes to Cart and CartLine on Storefront API - Shopify developer changelog
description: Shopify’s developer changelog documents all changes to Shopify’s platform. Find the latest news and learn about new platform opportunities.
source_url:
  html: https://shopify.dev/changelog/changes-to-cart-and-cartline-on-storefront-api
  md: https://shopify.dev/changelog/changes-to-cart-and-cartline-on-storefront-api.md
---

[Back to Developer changelog](https://shopify.dev/changelog)

June 15, 2022

Tags:

* API
* 2022-07

# Changes to Cart and CartLine on Storefront API

As part of the GraphQL Storefront API 2022-07 API release, the following are changes to have been made to the `Cart` and `CartLine` object:

* New `attribute` field with a `key` argument
* `estimatedCost` is renamed to `cost` on `Cart`.
* `estimatedCost` is renamed to `cost` on `CartLine`.
* Add `subtotalAmountEstimated`, `totalAmountEstimated`, `totalTaxAmountEstimated`, `totalDutyAmountEstimated` to `CartCost`
* `amount` is renamed to `amountPerQuantity` on `CartLineCost`.
* `compareAtAmount` is renamed to `compareAtAmountPerQuantity` on `CartLineCost`.

Learn more about the `Cart` object on [Shopify.dev](https://shopify.dev/api/storefront/unstable/objects/Cart#top).