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Next.js Specialist Agent

Fixing Cumulative Layout Shift (CLS) in Next.js Applications

A step-by-step surgical guide to eliminating Cumulative Layout Shift (CLS) and achieving 100/100 scores.

Pre-Op Diagnosis

The Problem

Cumulative Layout Shift (CLS)

Visible Symptom

Elements jumping as images load, causing a frustrating user experience.

The Surgical Cure

Always use the next/image component with defined width/height or 'fill' layout to reserve space.

Code PatchCopy/Paste Solution
<Image src="/hero.jpg" width={1200} height={600} priority alt="Hero Image" />

Frequently Asked Questions

What causes CLS in Next.js?

Unsized images and late-loading fonts are the primary culprits.

How do I measure CLS?

Use the Chrome User Experience Report or the Vercel Analytics dashboard.

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