𝗪𝗲𝗯 𝗩𝗶𝘁𝗮𝗹𝘀 𝗢𝗽𝘁𝗶𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻 𝗚𝘂𝗶𝗱𝗲

𝗪𝗲𝗯 𝗩𝗶𝘁𝗮𝗹𝘀 𝗢𝗽𝘁𝗶𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻 𝗚𝘂𝗶𝗱𝗲

Google uses Core Web Vitals to measure user experience. These metrics affect your SEO and user satisfaction.

Largest Contentful Paint (LCP) measures loading. Keep it under 2.5 seconds.

• Use WebP or AVIF images.
• Preload your main image.
• Speed up your server response.

First Input Delay (FID) measures interactivity. Keep it under 100 milliseconds.

• Break up long JavaScript tasks.
• Reduce your bundle size.
• Defer non-critical scripts.

Cumulative Layout Shift (CLS) measures stability. Keep it under 0.1.

• Set width and height on images.
• Reserve space for dynamic content.

Better frontend habits:

• Use Real User Monitoring for real data.
• Set performance budgets in your CI pipeline.
• Use local state instead of global state.
• Keep initial JavaScript under 200KB.
• Use TypeScript to stop runtime errors.

Your plan:

• Week 1: Run a Lighthouse audit. Fix three bugs.
• Month 1: Audit accessibility with axe-core.
• Quarter 1: Build a shared component library.

Prioritize users over developer convenience. Fast, accessible sites win.

Source: https://dev.to/therizwansaleem/web-vitals-optimization-a-systematic-approach-to-lcp-fid-and-cls-ad0