A deep dive into building a highly customized select dropdown using the new `appearance: base-select` CSS property. The implementation combines modern CSS features including anchor positioning, scroll-state queries, spring easing animations, and custom pseudo-elements with minimal JavaScript. Key features include automatic
Table of contents
Core Architecture #Alignment & Positioning #Animation & Transitions #Theming & Color Handling #Layout & Spacing #Scrolling & Overflow #Customizable Select Features #Accessibility & UX #Performance Optimizations #Example Variations #Try It #Wrapping Up #Sort: