If you have ever built a full-screen hero section, opened it on your phone, and watched the bottom get swallowed by the browser’s address bar, you are not doing anything wrong. 100vh is broken on mobile by design, and it has been frustrating developers for years.

2026 is going to be absolutely wild for CSS, and honestly, JavaScript for UI components is slowly becoming obsolete. I’ve been doing web development for about 5 years now, and what’s coming this year is genuinely exciting. I’m going to show you 16 new CSS features that eliminate JavaScript dependencies, unlock UI patterns that weren’t possible before, and make your code so much cleaner.

Browsers have become incredibly powerful. Features that used to require heavy JavaScript libraries are now built right into the browser. And honestly, it’s about time. Let me walk you through the Web APIs that are replacing entire libraries and making your bundle sizes way smaller.