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/react-best-practices

@805687f official
by Vercel Labsvercel-labs/agent-skills32k stars
2,784

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.

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Use this Skill: https://skilld.dev/gh/vercel-labs/agent-skills/react-best-practices

This session only. Nothing lands on disk.

rulesrendering-content-visibility.md

≈204 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

No alerts16d4 checks · Risk SAFE
  • Gen Agent Trust Hub16d

    This skill provides a comprehensive set of performance optimization and best practice guidelines for React and Next.js applications. No security issues or risky patterns were detected.

  • Socket16d

    No alerts

  • Snyk16d

    Risk: LOW · No issues

  • Runlayer6mo

    1/63 files flagged

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 last month.

Steadyupdated 6 months ago

Capability

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

Topics

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README badge for vercel-labs/agent-skills/react-best-practices

What it does

Provides 70 React and Next.js performance optimization rules organized by priority, from eliminating waterfalls and bundle size optimization to re-render and rendering performance. Use this skill when writing, reviewing, or refactoring React/Next.js code to apply Vercel's performance patterns for data fetching, component structure, and bundle optimization.

Generated from the current SKILL.md.

Frequently asked

Does this skill cover both React and Next.js?
Yes. The skill includes guidelines for React components, Next.js pages, server-side rendering, server actions, and data fetching patterns across both frameworks.
Are these rules ranked by importance?
Yes. Rules are organized into 8 categories ranked by impact, from eliminating waterfalls and bundle optimization (CRITICAL) down to advanced patterns (LOW).
Can this skill be used during code review and refactoring?
Yes. The skill is intended for writing new code, reviewing existing code for performance issues, and refactoring React/Next.js applications.
Does this skill include code examples?
Yes. Each of the 70 rules has a detailed file with incorrect and correct code examples, explanations, and additional context.

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