## What does this PR do? This PR adds https://vercel.com/blog/introducing-react-best-practices for your coding agent using `npx add-skill vercel-labs/agent-skills` command The skills are added to `.claude/`, `.cursor/`, and `.opencode/` directories to provide React and Next.js performance optimization guidance for AI-assisted workflows. ## Updates since last revision Addressed Cubic AI review feedback for issues with confidence >= 9/10: - **rerender-dependencies.md** - Replaced `console.log(user.id)` with `fetchUserDetails(user.id)` to avoid logging sensitive information - **server-after-nonblocking.md** - Removed `sessionCookie` from `logUserAction` call to avoid logging sensitive authentication data, added `await` to async call - **bundle-conditional.md** - Added `loadError` state and `setLoadError` setter to fix undefined `setEnabled` reference - **advanced-event-handler-refs.md** - Updated `useWindowEvent` handler signature to accept `Event` parameter and forward it to the stored handler - **rerender-derived-state.md** - Closed `<nav>` elements in both examples for valid JSX Fixes applied to both `.claude` and `.cursor` skill directories for consistency. ## Mandatory Tasks (DO NOT REMOVE) - [x] I have self-reviewed the code (A decent size PR without self-review might be rejected). - [x] N/A I have updated the developer docs in /docs if this PR makes changes that would require a [documentation change](https://cal.com/docs). If N/A, write N/A here and check the checkbox. - [x] N/A, I confirm automated tests are in place that prove my fix is effective or that my feature works. ## How should this be tested? These are documentation files for AI coding agents. No runtime testing required - review the markdown files to verify the example code snippets are correct. ## Checklist for human review - [ ] Verify example code snippets in the skill files are syntactically correct - [ ] Confirm the fixes don't introduce new issues in the documentation examples - [ ] Check that `.claude` and `.cursor` directories have consistent content --- Link to Devin run: https://app.devin.ai/sessions/f7f7e67fdeea4b22a4817d63ed9e1759 Requested by: unknown ()
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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