Interaction to Next Paint (INP) - Core Web Vitals
Good news! The Interaction to Next Paint will replace the FID as a Core Web Vital per March 2024. Just like first input delay (FID), the Interaction to Next Paint puts focus on the responsiveness of the webpage. To understand how fast your page visually responds to user input, throughout the page's life cycle, Interaction to Next Paint records the latency of all interactions. The Interaction to Next Paint of the page is the highest value of those interactions - or a close approximation of the highest value for pages with many interactions.