Optimizing Core Web Vitals for Next.js Applications

How to achieve 100/100 Google Lighthouse scores by accelerating LCP, reducing CLS, and improving INP responsiveness.

Google's Core Web Vitals measure real-world user experience metrics: Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS).

1. Accelerating LCP: Optimize hero images using Next.js Image component with priority loading, WebP format, and proper aspect ratios.

2. Minimizing Layout Shift (CLS): Explicitly define layout container dimensions and avoid dynamically inserted un-sized elements.

3. Improving INP: Keep client JavaScript bundles lightweight, eliminate unnecessary hydration overhead, and defer non-critical scripts.

Muhammad Saqlain

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