What’s !important #16: sibling-index() Animations, Use Cases for the infinity Keyword, Container Stuck Queries, and More

Published: July 31, 2026•via CSS-Tricks• By Daniel Schwarz

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The soon-Baseline sibling-index() function for animations, CSS and the 2026 FIFA World Cup, use cases for the infinity keyword, container "stuck" queries, and more.

What’s !important #16: sibling-index() Animations, Use Cases for the infinity Keyword, Container Stuck Queries, and More originally handwritten and published with love on CSS-Tricks. You should really get the newsletter as well.

Source: CSS-Tricks (Published: Fri, 31 Jul 2026 14:06:21 +0000). Read the full article on the original site.

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