# What is Interaction to Next Paint (INP) on Shopify and how do you fix it? (Technical Case 3) | Expert Answer & Guide

> INP is Google's Core Web Vital metric measuring page responsiveness to user interactions (clicks, taps, key presses). Poor INP is caused by long JavaS... Read the detailed technical breakdown and recommendations.

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What is Interaction to Next Paint (INP) on Shopify and how do you fix it? (Technical Case 3) | Expert Answer & Guide

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What is Interaction to Next Paint (INP) on Shopify and how do you fix it? (Technical Case 3)

INP is Google's Core Web Vital metric measuring page responsiveness to user interactions (clicks, taps, key presses). Poor INP is caused by long JavaScript tasks blocking the browser main thread.

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In-Depth Engineering Explanation

To fix poor INP on Shopify, we break up long-running JavaScript execution tasks, optimize DOM event listeners on Add-to-Cart and filter buttons, and replace heavy jQuery-dependent scripts with lightweight native modern vanilla JavaScript.

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