/vercel-react-best-practices

by Vercel Labsvercel-labs/openreview1.7k stars

118

React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.

61 files
174.8 KB
MIT
Updated 7 months ago
GitHub
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Use this Skill: https://skilld.dev/gh/vercel-labs/openreview/vercel-react-best-practices

This session only. Nothing lands on disk.

rulesrendering-content-visibility.md

818 B raw

≈205 tokens on demand. Your agent reads this file only when SKILL.md points to it.

CSS content-visibility for Long Lists

Apply content-visibility: auto to defer off-screen rendering.

CSS:

.message-item {
  content-visibility: auto;
  contain-intrinsic-size: 0 80px;
}

Example:

function MessageList({ messages }: { messages: Message[] }) {
  return (
    <div className="overflow-y-auto h-screen">
      {messages.map((msg) => (
        <div key={msg.id} className="message-item">
          <Avatar user={msg.author} />
          <div>{msg.content}</div>
        </div>
      ))}
    </div>
  );
}

For 1000 messages, browser skips layout/paint for ~990 off-screen items (10× faster initial render).

Source: SKILL.md on GitHub

Third-party checks

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Gen Agent Trust Hub17d
This skill provides rules, tools, and scripts intended for compiling and managing React and Next.js performance optimization guidelines. No high-severity security considerations or anomalous patterns were discovered.
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Risk: LOW · No issues
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Provenance

Signed by skilld at 805687f. This ties the file your Agent reads to that commit on GitHub. It does not review the instructions.

Last checked against GitHub 2 months ago.

Dormantupdated 7 months ago

Capability

metadata: { "author": "vercel", "version": "1.0.0" }

Topics

React
Performance
next.js
optimization
bundle-size
server-components
data-fetching
rendering
javascript

What it does

Provides 58 prioritized React and Next.js performance rules from Vercel Engineering, organized across waterfalls, bundle size, server/client data fetching, re-renders, and rendering patterns. Use when writing or refactoring React components and Next.js pages to apply production-grade optimization practices.

Generated from the current SKILL.md.

Frequently asked

Does this skill apply to both React and Next.js?

Yes. The skill covers React components, Next.js pages, server components, server actions, and data fetching patterns for both frameworks.

Can I use this skill to review existing code for performance issues?

Yes. The skill is designed for reviewing and refactoring React/Next.js code against 58 prioritized rules organized by impact (critical, high, medium, low).

Does this skill cover bundle size optimization?

Yes. Bundle size optimization is marked as a critical priority category with 5 rules, including barrel imports, dynamic imports, and third-party script deferral.

What about server-side performance and data fetching?

The skill covers both. It includes rules for server components, React.cache(), LRU caching, parallel fetching, and client-side patterns like SWR deduplication and event listener optimization.

Generated from the current SKILL.md. These answers refresh after source changes.

/vercel-react-best-practices