Robin Chowdhury

Frontend performance architect at a large e-commerce site. Spends his days fighting third-party scripts.

Articles by Robin Chowdhury

Tutorials Jul 18, 2026Intermediate

Passive Event Listeners in 2026: Fix Scroll Jank From Third-Party Scripts

A passive event listener promises the browser you won't call preventDefault(), so the compositor thread can scroll immediately without waiting for JavaScript. Here's how I audit and fix the third-party offenders that still ship blocking touchstart and wheel handlers in 2026.

Robin Chowdhury 13 min read

Tutorials Jun 30, 2026Intermediate

Element Timing API: Measure Render Times Beyond LCP in 2026

Tag any image, price, or button with elementtiming and read its real paint timestamp from PerformanceObserver. Practical RUM setup, cross-origin gotchas, and the new Container Timing trial.

Robin Chowdhury 13 min read

Tutorials Jun 17, 2026Intermediate

Cross-Document View Transitions: Smooth MPA Navigation in 2026

Cross-document View Transitions let MPAs animate between pages like SPAs, opt in via one CSS rule. Real-world setup, named elements, Speculation Rules pairing, and Core Web Vitals impact from production.

Robin Chowdhury 14 min read