Are `background-position-x` and `background-position-y` Officially Standardized CSS Properties?

background-position-x and background-position-y: A CSS Standard Query

The introduction of the CSS3 properties background-position-x and background-position-y has sparked concerns about their official status within the W3C CSS standard.

Controversy and Status

These properties, which split the traditional background-position property into horizontal and vertical components, were proposed for CSS3 but ultimately rejected by the Working Group due to perceived weak use cases. Despite this, they have been implemented in WebKit-based browsers like Chrome and Safari, while Gecko (Firefox) and Presto (Opera) do not support them.

Future Prospects

Recent discussions within the CSS WG have revealed that there will be no changes to the syntax of background-position or transform-origin in the foreseeable future. This suggests that background-position-x and background-position-y may not be included in the current version of CSS (e.g., CSS3 or later).

CSS4 Potential

However, hope remains for their eventual standardization. A thread on the

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