react-patterns
Modern React patterns and principles. Hooks, composition, performance, TypeScript best practices.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/davila7/claude-code-templates --skill react-patterns- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads react-patterns automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
React Patterns
Principles for building production-ready React applications.
1. Component Design Principles
Component Types
| Type | Use | State |
|---|---|---|
| Server | Data fetching, static | None |
| Client | Interactivity | useState, effects |
| Presentational | UI display | Props only |
| Container | Logic/state | Heavy state |
Design Rules
- One responsibility per component
- Props down, events up
- Composition over inheritance
- Prefer small, focused components
2. Hook Patterns
When to Extract Hooks
| Pattern | Extract When |
|---|---|
| useLocalStorage | Same storage logic needed |
| useDebounce | Multiple debounced values |
| useFetch | Repeated fetch patterns |
| useForm | Complex form state |
Hook Rules
- Hooks at top level only
- Same order every render
- Custom hooks start with "use"
- Clean up effects on unmount
3. State Management Selection
| Complexity | Solution |
|---|---|
| Simple | useState, useReducer |
| Shared local | Context |
| Server state | React Query, SWR |
| Complex global | Zustand, Redux Toolkit |
State Placement
| Scope | Where |
|---|---|
| Single component | useState |
| Parent-child | Lift state up |
| Subtree | Context |
| App-wide | Global store |
4. React 19 Patterns
New Hooks
| Hook | Purpose |
|---|---|
| useActionState | Form submission state |
| useOptimistic | Optimistic UI updates |
| use | Read resources in render |
Compiler Benefits
- Automatic memoization
- Less manual useMemo/useCallback
- Focus on pure components
5. Composition Patterns
Compound Components
- Parent provides context
- Children consume context
- Flexible slot-based composition
- Example: Tabs, Accordion, Dropdown
Render Props vs Hooks
| Use Case | Prefer |
|---|---|
| Reusable logic | Custom hook |
| Render flexibility | Render props |
| Cross-cutting | Higher-order component |
6. Performance Principles
When to Optimize
| Signal | Action |
|---|---|
| Slow renders | Profile first |
| Large lists | Virtualize |
| Expensive calc | useMemo |
| Stable callbacks | useCallback |
Optimization Order
- Check if actually slow
- Profile with DevTools
- Identify bottleneck
- Apply targeted fix
7. Error Handling
Error Boundary Usage
| Scope | Placement |
|---|---|
| App-wide | Root level |
| Feature | Route/feature level |
| Component | Around risky component |
Error Recovery
- Show fallback UI
- Log error
- Offer retry option
- Preserve user data
8. TypeScript Patterns
Props Typing
| Pattern | Use |
|---|---|
| Interface | Component props |
| Type | Unions, complex |
| Generic | Reusable components |
Common Types
| Need | Type |
|---|---|
| Children | ReactNode |
| Event handler | MouseEventHandler |
| Ref | RefObject<Element> |
9. Testing Principles
| Level | Focus |
|---|---|
| Unit | Pure functions, hooks |
| Integration | Component behavior |
| E2E | User flows |
Test Priorities
- User-visible behavior
- Edge cases
- Error states
- Accessibility
10. Anti-Patterns
| ❌ Don't | ✅ Do |
|---|---|
| Prop drilling deep | Use context |
| Giant components | Split smaller |
| useEffect for everything | Server components |
| Premature optimization | Profile first |
| Index as key | Stable unique ID |
Remember: React is about composition. Build small, combine thoughtfully.
FAQ
What does the react-patterns skill do?
Modern React patterns and principles. Hooks, composition, performance, TypeScript best practices.
How do I install react-patterns?
Run npx skills add https://github.com/davila7/claude-code-templates --skill react-patterns in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/react-patterns/ (personal) or .claude/skills/react-patterns/ (project).
Which AI agents can use react-patterns?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is react-patterns safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains react-patterns?
It is published by davila7 in davila7/claude-code-templates. It has 502 recorded installs.
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