How To Wait For The Sibling-count() And Sibling-index() Functions | CSS-Tricks
Briefly

New features in CSS undergo extensive processes, and as an everyday developer, we often find ourselves waiting and wondering how to push boundaries during this time.
The upcoming sibling-count() and sibling-index() functions have been long-awaited enhancements, allowing developers to know an element's position and count of children for CSS styling.
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