Browser & Web Performance · Senior · Question 19 of 75

INP is poor, but every event handler takes under 20 ms. What should you look at?

1Nothing, INP can't be poor if handlers are fast
✓Correct answer: Input delay from other tasks running at the time and presentation delay from heavy rendering after the handler
3Only the network waterfall

Explanation

Timers, third-party scripts or hydration can occupy the main thread when the user clicks; huge DOM updates make the next frame slow.

Further reading

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