Subchapter 3.19

Bundle Defer Third Party

rules/bundle-defer-third-party.mdMarkdown920 BView on GitHub

Defer Non-Critical Third-Party Libraries

Analytics, logging, and error tracking don’t block user interaction. Load them after hydration.

Incorrect (blocks initial bundle):

Bundle Defer Third Party · Vercel React Best Practices · vercel-labs/agent-skills · Skills Docs

import { Analytics } from '@vercel/analytics/react'

export default function RootLayout({ children }) {
  return (
    <html>
      <body>
        {children}
        <Analytics />
      </body>
    </html>
  )
}

import dynamic from 'next/dynamic'

const Analytics = dynamic(
  () => import('@vercel/analytics/react').then(m => m.Analytics),
  { ssr: false }
)

export default function RootLayout({ children }) {
  return (
    <html>
      <body>
        {children}
        <Analytics />
      </body>
    </html>
  )
}