What is Interaction to Next Paint?
Also called: INP
The short answer
Interaction to Next Paint measures how quickly a page visibly responds after a tap, click or key press, across the whole visit; good is 200 milliseconds or less.
Interaction to Next Paint, explained
Long JavaScript tasks block responses. Breaking up work, sending less JavaScript and deferring non-urgent scripts improve it.
Questions people ask about Interaction to Next Paint
What is Interaction to Next Paint?
Interaction to Next Paint measures how quickly a page visibly responds after a tap, click or key press, across the whole visit; good is 200 milliseconds or less.
Related terms
Core Web Vitals are Google's three user-experience metrics: Largest Contentful Paint for loading, Interaction to Next Paint for responsiveness and Cumulative Layout Shift for visual stability.
HydrationHydration is the step where JavaScript attaches to server-rendered HTML in the browser, turning a static-looking page into an interactive one.
JankJank is visible stutter when a page cannot draw frames in time, making scrolling, animation or typing feel choppy.
Page speedPage speed is how quickly a web page loads and becomes usable, measured by metrics like Largest Contentful Paint, Interaction to Next Paint and layout stability.
Part of the Web Encyclopedia by Apex Flow Digital. Definitions are general knowledge, kept current, with no invented statistics.