01 - INP: The New Critical Metric That Replaced FID
INP (Interaction to Next Paint) replaced FID as the Core Web Vitals responsiveness metric in March 2024. 43% of sites still fail the 200ms threshold.
INP (Interaction to Next Paint) replaced FID as the Core Web Vitals responsiveness metric in March 2024. 43% of sites still fail the 200ms threshold. Learn how to measure it with Chrome DevTools and field data, and why it changes how we think about JavaScript architecture.
What you'll learn
- Come INP differisce da FID e perche misura la responsivita reale
- Le soglie Good/Needs Improvement/Poor di INP (200ms / 500ms)
- Come misurare INP con Chrome DevTools, web-vitals.js e PageSpeed Insights
- I cinque pattern JavaScript piu comuni che fanno esplodere l'INP
- Come interpretare i dati di campo CrUX vs i dati sintetici Lighthouse
This article is part of the Core Web Vitals series on federicocalo.dev.
Read the full article
The complete article (9 min read) with code examples, diagrams, and practical exercises is available here:
➡️ 01 - INP: The New Critical Metric That Replaced FID
https://federicocalo.dev/en/blog/inp-interaction-to-next-paint-complete-guide
By Federico Calò — Software Developer & Technical Writer