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

The article discusses upcoming CSS features, including sibling-index() for animations, use cases for the infinity keyword, and container 'stuck' queries. These features are expected to be part of the 2026 FIFA World Cup's CSS implementation. The article highlights the importance of staying updated with the latest CSS developments. As an engineer, it's essential to be aware of these changes to stay current. No immediate action is required, but monitoring future updates is recommended.