---
title: >-
  New article.updated_at Liquid property and updated behavior for cart - 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/new-article-updated_at-liquid-property-and-updated-behavior-for-cart
  md: >-
    https://shopify.dev/changelog/new-article-updated_at-liquid-property-and-updated-behavior-for-cart.md
metadata:
  effectiveApiVersion: ''
  affectedApi: []
  primaryTag:
    displayName: Themes
    handle: dev_themes
  secondaryTag:
    displayName: New
    handle: new
  indicatesActionRequired: false
  createdAt: '2020-02-05T11:25:11-05:00'
  postedAt: '2020-02-05T00:00:00-05:00'
  updatedAt: '2024-02-02T10:04:56-05:00'
  effectiveAt: '2020-02-05T00:00:00-05:00'
---

February 5, 2020

Tags:

* Themes

# New article.updated\_at Liquid property and updated behavior for cart

We’ve added a new property for the `article` object as well as updated the behaviour of `cart.attributes` and the `/cart/add.js` endpoint.

`article.updated_at`

The `article.updated_at` property returns a timestamp defining when a blog article was updated. This allows themes to include the `dateModified` field within their Structured Data for SEO purposes. The `date` filter can be applied to format the timestamp. Learn more about the `article.updated_at` property in [the Help Center.](https://help.shopify.com/en/themes/liquid/objects/article#article-updated_at)

`cart.attributes`

This existing property has been updated to hide keys with a double underscore `(__)` prefix from Liquid and AJAX API. Learn more about the `cart.attributes` property in the [Help Center](https://help.shopify.com/en/themes/liquid/objects/cart#cart-attributes).

`/cart/add.js`

The `/cart/add.js` endpoint (add to cart) of the AJAX API has been updated to support adding multiple items to the cart in a single request. This previously required a complex queuing system to send multiple requests. The previous payload format is still supported, but the "multiple items" payload format is now the recommended approach. Learn more about the Ajax API in the [Help Center](https://help.shopify.com/en/themes/development/getting-started/using-ajax-api#add-to-cart).