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Module 12: Performance and Advanced Patterns

Profiling and optimising React applications, SSR and SSG with Next.js, hydration, web accessibility, and production-grade design patterns.

This module is planned. Full content coming soon.

Prerequisites

  • Module 11: Build Tooling and Deployment

What You'll Learn

  • Profiling with React DevTools Profiler: identifying unnecessary re-renders, understanding the flame graph, measuring component render times
  • Memoization strategy: when React.memo, useMemo, and useCallback actually help — and when they add overhead without benefit
  • Virtual scrolling/windowing: rendering only the visible portion of large lists with react-window or react-virtual
  • Server-Side Rendering with Next.js: App Router, Server Components vs. Client Components, async server components, streaming
  • Static Site Generation: generateStaticParams, ISR (Incremental Static Regeneration), choosing between SSR/SSG/CSR
  • Web accessibility (a11y): semantic HTML, ARIA roles/attributes, keyboard navigation, focus management in React, testing with axe
  • Advanced design patterns: Error Boundaries, Suspense for data fetching, optimistic UI updates