Summary & Key Takeaways ​

• The article explores a novel CSS technique.
• It demonstrates how to convey sibling count to a parent element.
• This is achieved using scroll-driven animations.
• The method offers a CSS-only solution to a common layout problem.
• It avoids the need for JavaScript for this specific interaction.
• The technique highlights creative uses of modern CSS features.

Our Commentary ​

This sounds like exactly the kind of clever CSS trick I love to see. Using scroll-driven animations to pass information up the DOM tree is genuinely inventive. I'm always impressed by the ingenuity of frontend developers pushing the boundaries of what CSS can do. I'm eager to dive into this and see the implementation details.