Advanced – Non-Functional Testing
Interaction to Next Paint (INP) – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A Core Web Vital measuring responsiveness to user interactions, replacing First Input Delay.
In simple words
How quickly the page responds to user clicks and taps — replaces FID.
Exam tip
INP replaced FID in March 2024 as a Core Web Vital.
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