CSS Containment in 2026: contain: layout, paint, size, and strict Explained
Understand every value of the CSS contain property (layout, paint, size, strict, content) with 2026 browser support notes, DevTools workflow, and real-world INP wins.
Articles by Editorial Team
Chrome DevTools Performance Insights: Auto-Diagnose LCP, INP, and CLS in 2026
The Chrome DevTools Performance Insights sidebar diagnoses Core Web Vitals from a single trace. Here's how to record the right trace, read the LCP/INP/CLS subpart breakdowns, and use Live Metrics to catch regressions without leaving the panel.
Client Hints for Responsive Images: Sec-CH-DPR, Sec-CH-Width & Critical-CH in 2026
Client Hints (Sec-CH-DPR, Sec-CH-Width, Critical-CH) let your CDN pick byte-perfect image sizes in 2026. Practical setup, worker code, and real LCP wins from a Chrome-heavy audit.
Resource Hints in 2026: preload vs prefetch vs preconnect vs dns-prefetch
A practical 2026 guide to the four browser resource hints (preload, prefetch, preconnect, dns-prefetch): when each one helps, when it hurts LCP, and the exact decision flow to pick the right one.
Service Worker Static Routing API: Skip the Fetch Handler and Cut LCP in 2026
The Service Worker Static Routing API lets the browser bypass your SW fetch handler for chosen URLs, cutting cold-start latency and LCP. Hands-on guide with 2026 examples, Workbox interop, browser support, and the diagnostics I use to prove the win.