By Wilson Xu | May 5, 2026
The front-end landscape has shifted. For years, the reflex was: need a dynamic layout? Reach for JavaScript. Need an animation triggered by scroll position? IntersectionObserver. Need a custom dropdown? Fifty lines of event handlers and DOM manipulation.
That era is ending. Modern CSS has absorbed so many patterns that previously required JavaScript that a significant chunk of your client-side code may now be dead weight. Browsers have shipped features that handle layout, animation, interactivity, and even state management declaratively -- and they do it faster, with less code, and without blocking the main thread.