---
title: Standard storefront events and actions now support cart attributes - 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/events-and-actions-cart-attributes-support
  md: https://shopify.dev/changelog/events-and-actions-cart-attributes-support.md
---

# Standard storefront events and actions now support cart attributes

DateAugust 6, 2026

FlagsUpdate

SurfacesPlatform

The [`updateCart`](https://shopify.dev/docs/api/storefront-events-and-actions/actions/update-cart) standard action now updates cart attributes, and a new [`shopify:cart:attributes-update`](https://shopify.dev/docs/api/storefront-events-and-actions/events/cart-attributes-update) event fires whenever an attributes update is initiated.

Before this, changing an attribute meant calling the Storefront API yourself, and nothing told your app when one changed. The action now handles attributes like any other cart update, and the event fires whether your app, the theme, or another app made the change. It carries the full new set of attributes and a promise for the result, so you can update your UI right away and roll it back if the cart declines the change.

Learn more in the [event reference](https://shopify.dev/docs/api/storefront-events-and-actions/events/cart-attributes-update) and the updated [`updateCart` reference](https://shopify.dev/docs/api/storefront-events-and-actions/actions/update-cart).