50 lines
920 B
Markdown
50 lines
920 B
Markdown
---
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title: Defer Non-Critical Third-Party Libraries
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impact: MEDIUM
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impactDescription: loads after hydration
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tags: bundle, third-party, analytics, defer
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---
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## Defer Non-Critical Third-Party Libraries
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Analytics, logging, and error tracking don't block user interaction. Load them after hydration.
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**Incorrect (blocks initial bundle):**
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```tsx
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import { Analytics } from '@vercel/analytics/react'
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export default function RootLayout({ children }) {
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return (
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<html>
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<body>
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{children}
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<Analytics />
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</body>
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</html>
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)
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}
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```
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**Correct (loads after hydration):**
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```tsx
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import dynamic from 'next/dynamic'
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const Analytics = dynamic(
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() => import('@vercel/analytics/react').then(m => m.Analytics),
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{ ssr: false }
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)
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export default function RootLayout({ children }) {
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return (
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<html>
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<body>
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{children}
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<Analytics />
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</body>
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</html>
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)
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}
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```
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