Interaction to Next Paint (INP)
Understand INP, the Core Web Vital that measures real-world responsiveness, how it is computed across a visit, and the techniques to keep interactions snappy.
Responsiveness as a Vital
Interaction to Next Paint (INP) measures how quickly the page visually responds to user input across the whole visit. It became a Core Web Vital, replacing First Input Delay.
INP vs FID
FID only measured the first interaction's input delay. INP is broader: it considers all interactions and the full latency through event handling and rendering, not just the initial delay.
All lessons in this course
- Introduction to Core Web Vitals
- LCP, FID, CLS Deep Dive
- Improving User Interaction Metrics
- Interaction to Next Paint (INP)