What is Cumulative Layout Shift in React?

CLS measures unexpected content jumps, killer for React's async renders — lazy loads, fonts, data pops.

How do I install and use useCLS hook?

`npm i @page-speed/hooks`, then `useCLS(callback)` in your root component. Reports CLS and per-shift details.

Measures surgically — arms you to fix. Real-time shifts point to culprits like rogue images or animations.

🌐 Frontend & Web

React apps jiggle like Jell-O under load. Enter useCLS — the hook that locks it down.

theAIcatchup Apr 11, 2026 4 min read

useCLS hook from @page-speed/hooks simplifies CLS measurement in React with zero boilerplate. 𝕏
Dual strategy: canonical web-vitals + real-time shift logging for debugging. 𝕏
Essential for SEO, conversions; predicts standard in future React ecosystems. 𝕏

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Ship faster. Build smarter.

#@page-speed/hooks #CLS #Core Web Vitals #Cumulative Layout Shift #React #React Hooks #useCLS #web performance

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Originally reported by dev.to