react-best-practices
Client-side React performance optimization patterns.
Install
mkdir -p .claude/skills/react-best-practices && curl -L -o skill.zip "https://mcp.directory/api/skills/download/1543" && unzip -o skill.zip -d .claude/skills/react-best-practices && rm skill.zipInstalls to .claude/skills/react-best-practices
About this skill
React Best Practices
Client-side React optimization patterns for Cloud UI. 29 rules organized by category and impact.
Activation Conditions
- Performance optimization tasks
- Component re-render issues
- Bundle size concerns
- useEffect/useMemo patterns
Rules by Category
Bundle Optimization (CRITICAL)
| Rule | Key Point |
|---|---|
bundle-barrel-imports | Import from source files, not barrel index.ts |
bundle-code-splitting | React.lazy + Suspense for heavy components, conditional loads, deferred 3rd-party |
bundle-preload | Preload critical resources |
Re-render Prevention (HIGH)
| Rule | Key Point |
|---|---|
rerender-memo | Memoize expensive computations |
rerender-dependencies | Minimize hook dependency arrays |
rerender-derived-state | Compute during render, not in effects |
rerender-functional-setstate | setState(prev => ...) to avoid stale closures |
rerender-lazy-state-init | useState(() => expensive()) not useState(expensive()) |
rerender-simple-expression-in-memo | Don't memoize trivial expressions |
rerender-transitions | useTransition for non-urgent updates |
rerender-defer-reads | Read URL params / storage inside callbacks, not at render |
Rendering (MEDIUM)
| Rule | Key Point |
|---|---|
rendering-conditional-render | Short-circuit with && / ternary, avoid render in effects |
rendering-hoist-jsx | Move static JSX outside components |
rendering-content-visibility | CSS content-visibility: auto for off-screen |
rendering-activity | React <Activity> for hidden UI |
rendering-animate-svg-wrapper | Wrap animated SVGs to isolate re-renders |
rendering-svg-precision | Limit SVG coordinate precision |
Async (MEDIUM)
| Rule | Key Point |
|---|---|
async-suspense-boundaries | Granular <Suspense> boundaries |
async-defer-await | Don't await non-blocking work |
async-dependencies | Load deps in parallel, not sequentially |
JavaScript (MEDIUM)
| Rule | Key Point |
|---|---|
js-caching-patterns | Module-level Map caches for repeated calls + storage reads |
js-batch-dom-css | Batch DOM reads/writes to avoid layout thrashing |
js-index-maps | Pre-index arrays into Maps for O(1) lookups |
js-length-check-first | Check .length before expensive operations |
js-tosorted-immutable | Use .toSorted() / .toReversed() for immutable transforms |
RegExp hoisting is enforced by Biome (useTopLevelRegex).
Browser (MEDIUM)
| Rule | Key Point |
|---|---|
client-event-listeners | Clean up event listeners in useEffect return |
client-passive-event-listeners | { passive: true } for scroll/touch handlers |
Advanced (LOW)
| Rule | Key Point |
|---|---|
advanced-event-handler-refs | Stable callback refs to avoid child re-renders |
advanced-use-latest | useLatest pattern for always-current values in callbacks |
More by redpanda-data
View all skills by redpanda-data →You might also like
nano-banana-pro
garg-aayush
Generate and edit images using Google's Nano Banana Pro (Gemini 3 Pro Image) API. Use when the user asks to generate, create, edit, modify, change, alter, or update images. Also use when user references an existing image file and asks to modify it in any way (e.g., "modify this image", "change the background", "replace X with Y"). Supports both text-to-image generation and image-to-image editing with configurable resolution (1K default, 2K, or 4K for high resolution). DO NOT read the image file first - use this skill directly with the --input-image parameter.
ui-ux-pro-max
nextlevelbuilder
"UI/UX design intelligence. 50 styles, 21 palettes, 50 font pairings, 20 charts, 8 stacks (React, Next.js, Vue, Svelte, SwiftUI, React Native, Flutter, Tailwind). Actions: plan, build, create, design, implement, review, fix, improve, optimize, enhance, refactor, check UI/UX code. Projects: website, landing page, dashboard, admin panel, e-commerce, SaaS, portfolio, blog, mobile app, .html, .tsx, .vue, .svelte. Elements: button, modal, navbar, sidebar, card, table, form, chart. Styles: glassmorphism, claymorphism, minimalism, brutalism, neumorphism, bento grid, dark mode, responsive, skeuomorphism, flat design. Topics: color palette, accessibility, animation, layout, typography, font pairing, spacing, hover, shadow, gradient."
youtube-transcribe-skill
feiskyer
Extract subtitles/transcripts from a YouTube video URL and save as a local file. Use when you need to extract subtitles from a YouTube video.
pdf-to-markdown
aliceisjustplaying
Convert entire PDF documents to clean, structured Markdown for full context loading. Use this skill when the user wants to extract ALL text from a PDF into context (not grep/search), when discussing or analyzing PDF content in full, when the user mentions "load the whole PDF", "bring the PDF into context", "read the entire PDF", or when partial extraction/grepping would miss important context. This is the preferred method for PDF text extraction over page-by-page or grep approaches.
flutter-development
aj-geddes
Build beautiful cross-platform mobile apps with Flutter and Dart. Covers widgets, state management with Provider/BLoC, navigation, API integration, and material design.
drawio-diagrams-enhanced
jgtolentino
Create professional draw.io (diagrams.net) diagrams in XML format (.drawio files) with integrated PMP/PMBOK methodologies, extensive visual asset libraries, and industry-standard professional templates. Use this skill when users ask to create flowcharts, swimlane diagrams, cross-functional flowcharts, org charts, network diagrams, UML diagrams, BPMN, project management diagrams (WBS, Gantt, PERT, RACI), risk matrices, stakeholder maps, or any other visual diagram in draw.io format. This skill includes access to custom shape libraries for icons, clipart, and professional symbols.
Related MCP Servers
Browse all servers
React Native Development GuideGet expert React Native software guidance with tools for component analysis, performance, debugging, and migration between React Native versions.
Postgres MCP ProBoost Postgres performance with Postgres MCP Pro—AI-driven index tuning, health checks, and safe, intelligent SQL optimization.
Meta AdsOptimize Facebook ad campaigns with AI-driven insights, creative analysis, and campaign control in Meta Ads Manager for Facebook.
RipgrepRipgrep offers high-performance text search, ideal for SEO optimization software and rapid content discovery across local filesystems.
GitHub Repos ManagerGitHub Repos Manager integrates with GitHub's REST API to streamline repo management, issues, pull requests, file ops, security, and analytics.
HydrolixHydrolix connects to time series databases for fast, secure analysis of large-scale log, metric & IoT data using ClickHouse SQL queries.