REDCAAP Framework for Frontend SD
RE — Requirements
Functional Requirements
- Core features & user interactions
- User stories & use cases
Non-Functional Requirements
- Performance (latency, load time)
- Accessibility (a11y)
- Scalability & availability
- Compatibility (devices, browsers)
- Security
- Localization / i18n
D — Design Patterns & Architecture Decision
- MVC vs MVVM vs MVP
- SPA vs MPA
- Monolithic SPA vs Micro-frontend
- Component-based vs Monolithic UI
- Unidirectional vs Bidirectional data flow
- Rendering Strategy (CSR/SSR/SSG/ISR/Hybrid)
C — Component & Hierarchy
- Break UI into modular, reusable components
- Single Responsibility per component
- Component hierarchy definition
- State management within components
- Avoid unnecessary re-renders
A — Architecture (HLD)
- Modular frontend components → cohesive UI
- Frontend components → Backend service mapping
- State management layer design
- Routing architecture
- Infrastructure (CDN, CI/CD, Service Workers)
A — API Design
- Choose API style (REST / GraphQL / gRPC / WebSocket / SSE)
- Define endpoints clearly
- Data model design (avoid over/under-fetching)
- Authentication & Authorization
- Error handling patterns
- Pagination, filtering, sorting
P — Performance Optimization
- Core Web Vitals (LCP, FID/INP, CLS)
- Code splitting & lazy loading
- Bundle size optimization & tree shaking
- Image optimization (WebP, AVIF)
- Caching (Browser, CDN, Service Worker)
- Virtualization for long lists
- Debouncing & throttling
- Accessibility (ARIA, semantic HTML, keyboard nav)
- Security (XSS, CSP, CORS, rate limiting)
- Localization & i18n support
- Observability (Sentry, Web Vitals monitoring)
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