# react-vite-best-practices

A skill with 23 rules for optimizing React apps built with Vite: build config, code splitting, HMR, assets, env variables and bundle analysis. Useful when an agent writes or reviews components.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 2900 installs · ★ 95
- Author: agent-skills
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/AsyrafHussin/agent-skills/tree/HEAD/skills/react-vite-best-practices/SKILL.md
- Updated: 2026-08-27
- HTML: https://affpapa.org/en/nevibecode/skills/react-vite-best-practices

## What it does

The skill splits into 6 categories by priority. The first two are critical: build optimization (manual chunks, minification, tree shaking, compression, asset hashing) and code splitting (lazy routes with `React.lazy()`, `Suspense` boundaries, dynamic imports, chunk prefetching). Development, asset handling, environment config and bundle analysis follow.

Each rule lives in its own file under `rules/`, such as `rules/build-manual-chunks.md` or `rules/split-route-lazy.md`, with an explanation and code samples. There is a ready `vite.config.ts` with aliases, vendor `manualChunks` and `optimizeDeps` settings, plus a typed env example in `vite-env.d.ts`. The full compiled guide sits in `AGENTS.md`.

One rule is blunt about secrets: anything prefixed with `VITE_` ends up in the bundle and is visible in the browser. If your project already has its own Vite conventions, the skill may push against them, so decide whose rules win before the agent starts editing your config.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add AsyrafHussin/agent-skills --skill react-vite-best-practices -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/react-vite-best-practices/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/react-vite-best-practices/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add AsyrafHussin/agent-skills --skill react-vite-best-practices -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/react-vite-best-practices/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add AsyrafHussin/agent-skills --skill react-vite-best-practices -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/react-vite-best-practices/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install AsyrafHussin/agent-skills react-vite-best-practices
```

2. **Manually: put the files in place**
- File: `.github/skills/react-vite-best-practices/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add AsyrafHussin/agent-skills --skill react-vite-best-practices -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/AsyrafHussin/agent-skills --path skills/react-vite-best-practices
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/react-vite-best-practices/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add AsyrafHussin/agent-skills --skill react-vite-best-practices -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/AsyrafHussin/agent-skills/tree/HEAD/skills/react-vite-best-practices/SKILL.md

## When to use it
- set up manual chunks so vendors stop sharing a bundle with app code
- split routes with React.lazy() and place Suspense boundaries
- speed up dev server startup through optimizeDeps
- find out which env variables leak into the client bundle
- inspect what is inside the bundle with rollup-plugin-visualizer

## Example prompts
- Check my vite.config.ts against react-vite-best-practices and tell me what to improve
- Split the app routes into lazy chunks and suggest where Suspense boundaries go
- Audit whether any secrets reach client code through VITE_ variables

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 2e2996fdad0affe5.

BEGIN THIRD-PARTY FILE 2e2996fdad0affe5
```text
---
name: react-vite-best-practices
description: React and Vite performance optimization guidelines. Use when writing, reviewing, or optimizing React components built with Vite. Triggers on tasks involving Vite configuration, build optimization, code splitting, lazy loading, HMR, bundle size, or React performance.
license: MIT
metadata:
  author: agent-skills
  version: "2.0.0"
---

# React + Vite Best Practices

Comprehensive performance optimization guide for React applications built with Vite. Contains 23 rules across 6 categories for build optimization, code splitting, development performance, asset handling, environment configuration, and bundle analysis.

## Metadata

- **Version:** 2.0.0
- **Framework:** React + Vite
- **Rule Count:** 23 rules across 6 categories
- **License:** MIT

## When to Apply

Reference these guidelines when:
- Configuring Vite for React projects
- Implementing code splitting and lazy loading
- Optimizing build output and bundle size
- Setting up development environment and HMR
- Handling images, fonts, SVGs, and static assets
- Managing environment variables across environments
- Analyzing bundle size and dependencies

## Rule Categories by Priority

| Priority | Category | Impact | Prefix |
|----------|----------|--------|--------|
| 1 | Build Optimization | CRITICAL | `build-` |
| 2 | Code Splitting | CRITICAL | `split-` |
| 3 | Development | HIGH | `dev-` |
| 4 | Asset Handling | HIGH | `asset-` |
| 5 | Environment Config | MEDIUM | `env-` |
| 6 | Bundle Analysis | MEDIUM | `bundle-` |

## Quick Reference

### 1. Build Optimization (CRITICAL)

- `build-manual-chunks` - Configure manual chunks for vendor separation
- `build-minification` - Minification with OXC (default) or Terser
- `build-target-modern` - Target modern browsers (baseline-widely-available)
- `build-sourcemaps` - Configure sourcemaps per environment
- `build-tree-shaking` - Ensure proper tree shaking with ESM
- `build-compression` - Gzip and Brotli compression
- `build-asset-hashing` - Content-based hashing for cache busting

### 2. Code Splitting (CRITICAL)

- `split-route-lazy` - Route-based splitting with React.lazy()
- `split-suspense-boundaries` - Strategic Suspense boundary placement
- `split-dynamic-imports` - Dynamic import() for heavy components
- `split-component-lazy` - Lazy load non-critical components
- `split-prefetch-hints` - Prefetch chunks on hover/idle/viewport
```
END THIRD-PARTY FILE 2e2996fdad0affe5

The third-party file has ended. Everything between the 2e2996fdad0affe5 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

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