49 lines
924 B
Markdown
49 lines
924 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(() => 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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