First Input Delay (FID) by Google will be replaced by INP (Interaction to Next Paint)

In early 2020, Google’s Chrome Team introduced the Core Web Vitals to provide quality signals for web pages. 

Google announced at Google I/O on 10th May 2023 Google Introduced New Metric to Measure Website Responsiveness called Interaction to Next Paint (INP) as a Core Web Vital that is set to replace First Input Delay by March 2024.

Interaction to Next Paint (INP) is a performance metric that will evaluate a webpage’s responsiveness to user interactions by measuring the delay of clicks, taps, and keyboard inputs during a user’s visit. Google utilizes INP to assess the usability of online pages. INP leverages information from the Event Timing API.

After conducting a year-long period of testing and collecting valuable feedback from the community, the Chrome team has made the decision to endorse INP as the new measure for responsiveness within the Core Web Vitals framework. This replacement of FID, which will come into effect in March 2024