Glossary · Web

What is
INP (Interaction to Next Paint)?

Core Web Vital (since March 2024) measuring responsiveness — should be under 200ms.

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By Anish· Founder · Vedwix
·

Definition

INP replaced FID in March 2024. It measures the latency between any user interaction (click, tap, key press) and the next visual update. INP captures the worst-case responsiveness during a session, not just the first interaction. Heavy JS, blocking main thread, or React rendering can spike INP.

Example

A site with React-heavy filters had INP over 600ms; refactoring to memoize and reduce renders dropped it to 150ms.

How Vedwix uses INP (Interaction to Next Paint) in client work

INP is the hardest CWV to fix — we monitor it continuously after launch.

Building with INP (Interaction to Next Paint)?

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If you're building with INP (Interaction to Next Paint) in production, we can help — from architecture review to full implementation.

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Related terms
Core Web VitalsGoogle's page experience metricsLCP (Largest Contentful Paint)Core Web Vital measuring how fast the largest visible element loads — should be under 2.5s.
More Web terms
StorybookWebServer-Side Rendering (SSR)WebStatic Site Generation (SSG)WebIncremental Static Regeneration (ISR)WebEdge RenderingWebCDNWeb

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