Rendering Performance Articles

Tutorials Jun 25, 2026Intermediate

Fix Cumulative Layout Shift (CLS) in 2026: Attribution, Session Windows, and Per-Source Fixes

Fix Cumulative Layout Shift fast: capture per-element attribution with web-vitals, replay shifts in Chrome DevTools, and ship one-line fixes for the five sources that cause 90% of real CLS.

Alex Petrov 17 min read

Tutorials Apr 08, 2026

CSS Scroll-Driven Animations: Build Smooth Scroll Effects with Zero JavaScript

Build production-ready scroll-based animations using CSS scroll() and view() timelines. Runs on the compositor thread with zero JavaScript, zero INP impact, and full code recipes for progress bars, parallax, and scroll reveals.

Priya Ravindran 14 min read