🚀 Modern CSS That Replaces JavaScript (Part 2)

You don’t need JavaScript to detect sticky headers anymore. Sticky Header Style on Scroll — NO JS Needed For years, changing a header style on scroll meant JavaScript. Scroll listeners. State management. Performance tuning. 🌀 But modern CSS can now handle sticky header state changes natively. 🔥 What’s New? With scroll-state container queries, CSS can detect when an element becomes sticky (stuck) and change styles automatically. No scroll listeners. No JS state. No hacks. 🧠 Real Use Case: Sticky Header Style Change A common UX pattern: 👉 Header changes background, radius, or shadow when it sticks to the top. Traditionally: JS checks scroll position Adds/removes a class Handles animations With modern CSS: CSS detects sticky state Styles update automatically Smooth transitions included 🧩 Minimal CSS Example .header-wrapper { position: sticky; top: 0; container-type: scroll-state; container-name: header; } @container header scroll-state(stuck: top) { .header-inner { background: yellow; col