Practical Steps to Improve Next.js Core Web Vitals

Core Web Vitals are field metrics, but most improvements come from a handful of disciplined frontend decisions.

Largest Contentful Paint

Start with what renders above the fold. Preload the hero image, avoid render-blocking CSS, and ship minimal JavaScript for the first paint.

Interaction to Next Paint

Long tasks block interaction. Split heavy work, defer non-critical scripts, and prefer server rendering for content-heavy pages.

Cumulative Layout Shift

Reserve space for images, fonts, and embeds. Never insert content above existing elements after load.