Chrome 144 supports side-relative values for background-position-{x,y}

[ddbeck]

Summary

It appears css.properties.background-position-x.side-relative_values and css.properties.background-position-y.side-relative_values shipped in Chrome 144, not Chrome 143.

Test results and supporting details

I used the test case found via Chromium issue 40468636 comment #5.

The test failed in Chrome 143, but works in Chrome 144. Comment #35 points toward this being a version 144 change.

I manually mirrored the data for Edge as well, since I can see no reason it would have been intentionally held back for Edge.

Related issues

• Supersedes Chrome 143 supports side-relative values for background-position-x/y #28494
• Discovered via Bump @mdn/browser-compat-data from 7.1.23 to 7.1.24 web-platform-dx/web-features#3607

[github-actions]

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[yisibl]

Sorry, I didn't make it clear in the original PR.

To be precise, this implementation was experimentally(chrome://flags/#enable-experimental-web-platform-features) supported starting with Chrome 142. Then it shipped in Chrome 144.

[ddbeck]

Thanks for the details @yisibl! I tried adding the flag data here, but it gets automatically pruned by the linter (since it's shipping in 144 the flag data is deemed no longer relevant).