> This page is for Developer.

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.bigcommerce.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.bigcommerce.com/_mcp/server.

## Cornerstone 5.1.0 for January 26, 2021

**Theme**

* Updated Cornerstone theme and respected variants to meet the verticals/industries documented in [BCTHEME-387](https://jira.bigcommerce.com/browse/BCTHEME-387).

* Fixed selecting certain option types which pushes window view to the bottom of the page. [#1959](https://github.com/bigcommerce/cornerstone/pull/1959)

* Fixed case when default option is out of stock add to cart button does not populate for in stock options. [#1955](https://github.com/bigcommerce/cornerstone/pull/1955)

* Dots on carousel should have similar colors as other slider controls. [#1958](https://github.com/bigcommerce/cornerstone/pull/1958)

* PDP - Fixed empty “Description” hiding all tabs when in tab view. [#1947](https://github.com/bigcommerce/cornerstone/pull/1947)

* Added custom event for product price change on PDP page. [#1948](https://github.com/bigcommerce/cornerstone/pull/1948)

* Fixed announcement of subscription message. [#1952](https://github.com/bigcommerce/cornerstone/pull/1952)

* Error message on PLPs not announced by screen reader. [#1956](https://github.com/bigcommerce/cornerstone/pull/1956)

* Add Play/Pause button to carousel. [#1944](https://github.com/bigcommerce/cornerstone/pull/1944)

* Alt text not provided for ratings. [#1949](https://github.com/bigcommerce/cornerstone/pull/1949)

* Fixed announcement for product on adding to cart. [#1950](https://github.com/bigcommerce/cornerstone/pull/1950)

* Fixed non-text contrast on add to cart modal according to WCAG AA standard. [#1946](https://github.com/bigcommerce/cornerstone/pull/1946)

* Fixed announcement of reCAPTCHA hidden content by screen reader. [#1943](https://github.com/bigcommerce/cornerstone/pull/1943)

* Carousel buttons do not receive focus. [#1937](https://github.com/bigcommerce/cornerstone/pull/1937)

* Empty cart message not read by screen reader. [#1935](https://github.com/bigcommerce/cornerstone/pull/1935)

* No tooltips provided for carousel buttons. [#1934](https://github.com/bigcommerce/cornerstone/pull/1934)

* Added announcement on shipping estimator errors. [#1932](https://github.com/bigcommerce/cornerstone/pull/1932)

* Add main tag on pages like Homepage, Category, Product, etc. to define the dominant content. [#1929](https://github.com/bigcommerce/cornerstone/pull/1929)

* Fixed unable to change product quantity several times on cart page using keyboard. [#1927](https://github.com/bigcommerce/cornerstone/pull/1927)

* Cornerstone - loading of thumbnail image delayed on cart page. [#1925](https://github.com/bigcommerce/cornerstone/pull/1925)

* Added narrow down pricing during option selections. [#1924](https://github.com/bigcommerce/cornerstone/pull/1924)

* Cornerstone - image zoom does not work on Internet Explorer. [#1923](https://github.com/bigcommerce/cornerstone/pull/1923)

* Fixed input placeholder color contrast according to AA standard. [#1933](https://github.com/bigcommerce/cornerstone/pull/1933)

* Bump stencil utils to 6.8.0. [#1945](https://github.com/bigcommerce/cornerstone/pull/1945)