What’s !important #7: random(), Folded Corners, Anchored Container Queries, and More

This issue covers a curated mix of overlooked and newly introduced CSS features for modern web development.

• •CSS random() and random-item() functions enable randomized property values (e.g., width, color) using a shared random key syntax.
• •Folded corner effects can now be achieved with CSS clip-path custom shapes, replacing older image or box-shadow approaches.
• •backdrop-filter applies background effects to any element (not just ::backdrop); font-variant-numeric: tabular-nums prevents layout shift when numbers update dynamically.
• •The Popover API is highlighted as a native platform feature that simplifies tooltip-like UI patterns.
• •Anchored container queries enable dynamic toggletip UIs; Chrome 146 ships scroll-triggered animations and customizable <select> support.