Best of 2025

The blog posts Hacker News loved most in 2025. 499 posts.

Web & Frontend
84

Tailwind CSS v4.0

We just released Tailwind CSS v4.0 — an all-new version of the framework optimized for performance and flexibility, with a reimagined configuration and customization experience, and taking full advantage of the latest advancements the web platform has to offer.

89

Don't animate height

Our app was mysteriously using 60% CPU and 25% GPU on my M2 MacBook. It turned out this was due to a tiny CSS animation! In this post, I show how to find expensive animations, why some are so expensive, and how to make many animations much cheaper. Along the way, we'll learn how the browser renders CSS animations and…