Teaches component composition patterns in React 19 including children prop, compound components, and render props. Use when designing component APIs, creating reusable components, or avoiding prop drilling.
Expert knowledge of frontend JavaScript for API integration including fetch/axios patterns, async/await error handling, form validation and submission, pagination implementation, loading states, DOM manipulation, event listeners, query parameter building, and vanilla JS best practices. Use when working with public/script.js, adding UI features, debugging client-side API issues, implementing forms, or managing client-side state.
Next.js 16+ avec App Router, Prisma 7, Better Auth. Documentation locale complète.
Frontend React 19 + TypeScript 5.7+ + TailwindCSS v4 + shadcn/ui dla Vite SPA. Komponenty, React Query, formularze (RHF + Zod), testowanie (Vitest + RTL + MSW), lazy loading, Suspense, Sonner. Używaj przy tworzeniu komponentów, stron, stylowaniu, data fetchingu, formularzach, testach, optymalizacji.
Build production-ready React components with TypeScript. Use when creating UI components (buttons, inputs, modals, cards), implementing hooks patterns, component composition, or setting up component documentation/testing. Covers accessibility, error boundaries, and performance optimization.
Add smooth scrolling for same-page anchor links only. Uses JavaScript to handle
Sanitizing and validating user input to prevent XSS, injection attacks, and security vulnerabilities in TypeScript applications
Implémente l'API View Transitions pour des transitions fluides entre pages et états. MANDATORY pour toutes navigations. À utiliser lors de navigation, page transitions, ou quand l'utilisateur mentionne "transition", "animation", "navigation", "smooth".
React Native accessibility patterns for iOS and Android. Use when implementing a11y features.
Build accessible forms with React Hook Form + Zod
Apply consistent React Native + Expo conventions for project structure, Expo Router navigation, theming primitives, icons, sqlite data patterns, safe area handling, and bun/bunx tooling. Use when adding or updating screens, components, navigation, data, or dependencies in Expo/React Native apps so work matches these practices.
Build well-structured React components using variant patterns, pure components, and container patterns. Provides patterns for component organization, type safety, and separation of concerns. Use when: building components with multiple display modes, organizing component hierarchies, implementing container/presentational patterns, reducing component proliferation while maintaining clear APIs.
Build accessible user interfaces with semantic HTML, keyboard navigation, proper color contrast, ARIA attributes, and screen reader support. Use this skill when creating or modifying frontend UI components, HTML templates, JSX/TSX files, forms, interactive elements, modals, navigation menus, or any user-facing interface code. Use this when ensuring keyboard accessibility, adding ARIA labels and roles, providing alt text for images, managing focus states, implementing proper heading hierarchy, testing with screen readers, or ensuring sufficient color contrast ratios. Use this when working on .jsx, .tsx, .vue, .html, or component files that render UI elements.
Angular Router for navigation, routing configuration, route guards, lazy loading, and parameter handling. Use when setting up routes, implementing navigation guards, lazy loading modules, handling route parameters, or implementing breadcrumbs and nested routes in Angular applications.
TanStack Query v5 patterns and common pitfalls. Use when implementing data fetching, cache invalidation, or debugging stale data issues. Triggers on: useQuery, useMutation, queryKey, invalidate, TanStack, React Query.
Common Next.js anti-patterns: useEffect misuse (data fetch, browser detect), useState for server data, Pages Router patterns, serial await, over-using 'use client'.
Modern React architecture patterns and web interface guidelines. Container/View split, framework adapters, React Query, dependency injection, Storybook-first development, accessibility, interactions, animations, performance. User experience over developer convenience.
React compound components pattern (safe, minimal context, ergonomic API)
React/TypeScript基本実装ルール。早期return、型定義、不変性、命名規則、エラーハンドリング、非同期処理などのコーディング規約を定義。実装時に参照すべき基本ルールを提供する。
Create or fix Open Graph metadata for any web project across stacks (React/Vue/Svelte/Next/Nuxt/SSR/SSG/static). Use when a user asks to add OG tags, fix social previews, or standardize OG/Twitter metadata, especially when react-helmet-async is required and og:image must be an absolute URL.
Tailwind CSS utility classes for layout, spacing, typography, responsive design, and dark mode. WHEN: Styling with Tailwind classes, implementing flex/grid layouts, responsive breakpoints, dark mode variants, animations, component styling patterns. WHEN NOT: Plain CSS/SCSS, CSS-in-JS solutions, HTML structure (use html-dev), JavaScript logic (use js-dev).
