Optimizing Core Web Vitals for 100/100 Lighthouse Scores

Why Core Web Vitals Matter

Core Web Vitals measure real-world user experience across three metrics:

1. LCP (Largest Contentful Paint): loading performance, target under 2.5s.
2. INP (Interaction to Next Paint): page responsiveness, target under 200ms.
3. CLS (Cumulative Layout Shift): visual stability, target under 0.1.

Optimization Techniques Implemented

• Pre-allocating Layout Dimensions: explicit width and height on every dynamic image and skeleton loader, so nothing jumps when it loads.
• Font Preloading: variable fonts preloaded with font-display: swap.
• CSS Tree-Shaking: Tailwind's JIT compiler keeps the shipped CSS under 15KB.