CSS sibling-index() and sibling-count(): A New Approach to Staggered Animations Without JavaScript
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Summary
This article introduces two new CSS functions — sibling-index() and sibling-count() — that allow developers to create staggered cascade animations (e.g., cards fading in one after another) without relying on :nth-child() rules or JavaScript workarounds. The author explains how these functions work, compares them to older approaches, and demonstrates their scalability (works for 5 items or 5,000). The piece covers practical use cases, browser support considerations, and the broader implications for CSS layout and animation workflows.
Source
Smashing MagazineCSS sibling-index() and sibling-count(): A New Approach to Staggered Animations Without JavaScriptsmashingmagazine.comKey quotes
· 4 pulledYou know that thing where you have a grid of cards, and you want them to fade in one after another? That staggered cascade effect. Looks great. Should be simple.
And yet every time I've built it, the implementation has made me feel like I'm doing something fundamentally stupid.
Works for 5 items or 5,000.
Staggered cascade effect in one line of CSS without :nth-child() rules or JS workarounds.
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