React to Fullstack Track (React 19 + Next.js 16)

Consolidated path from React fundamentals to production-grade Next.js fullstack apps with real-time and GraphQL options. Merges React Basics, Modern React Ecommerce, Portfolio Web Dev, Modern Fullstack (Next.js 16), Real-Time Web, and GraphQL Integration guides.

Table of Contents

1. React Core (React 19)
2. Application Patterns & State
3. Case Studies (Ecommerce + Portfolio)
4. Next.js 16 Fullstack Essentials
5. Data Access (REST, GraphQL, Realtime)
6. Deployment & Production Checklist

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1) React Core (React 19)

• Components & JSX: function components; props/state; composition over inheritance.
• Hooks: useState, useEffect (with dependency rules), useMemo, useCallback, useReducer, useContext.
• Events & forms: controlled vs uncontrolled; derived state; validation patterns.
• Rendering model: React 19 updates + Next.js cache components interplay; suspense for data fetching; error boundaries for resilience.

2) Application Patterns & State

• State domains: local UI state vs server/cache state; avoid prop drilling with context or state libraries when scope grows.
• Data fetching: fetch with suspense in Next.js; server actions vs API routes; caching strategies (revalidate tags/paths).
• Routing: Nested layouts/routes (App Router); metadata and SEO configuration per route; dynamic segments.
• UI system: reusable components (buttons, forms, modals); accessibility defaults (ARIA labels, focus traps).
• Performance: memoization, list virtualization, code-splitting, image optimization; profiling for regressions.

3) Case Studies (Ecommerce + Portfolio)

• Ecommerce highlights: product listing filters, cart state, checkout flow, optimistic UI for cart updates, payment integration placeholders.
• Portfolio highlights: sections (hero, projects, contact), content sourced from CMS/MDX, dark/light theming via CSS variables.
• Shared patterns: layout shells, data fetching hooks/services, error/loading UI components, analytics hooks.

4) Next.js 16 Fullstack Essentials

• App Router + layouts: parallel routes, intercepting routes; route handlers for APIs; edge vs node runtimes.
• Cache Components & new caching model: static vs dynamic; revalidate options; tagging for incremental cache invalidation.
• Server Actions: safe mutations with input validation; use Zod/Valibot for schemas; handle auth/permissions server-side.
• Proxy system (replaces middleware): request filtering, auth guards, localization; prefer route handlers for business logic.
• File upload & storage: handle via route handlers or server actions; stream to S3/Supabase; validate mime/size; signed URLs for downloads.
• Auth: NextAuth/Custom JWT; session strategies; securing server actions and route handlers.

5) Data Access (REST, GraphQL, Realtime)

• REST: fetch from API routes or external services; standardized error shapes; pagination and filtering patterns.
• GraphQL: schemas, queries, mutations; integrating with Apollo/urql or lightweight fetch + graphql-request; caching policies; fragments for reuse.
• Realtime: WebSockets or Server-Sent Events; client libraries (Supabase/Firebase); presence updates; optimistic UI with reconciliation.
• State alignment: co-locate data fetching with the route/layout responsible for the UI; avoid redundant requests via caching/tags.

6) Deployment & Production Checklist

• Builds: env separation; CI to run lint/tests/typecheck; bundle analysis for large pages.
• Env & secrets: NEXT_PUBLIC_ for safe exposure; server-side secrets kept out of client; edge runtime constraints.
• Monitoring: logging with request IDs; error reporting; performance metrics (Core Web Vitals).
• Security: headers (Content-Security-Policy, Strict-Transport-Security, X-Frame-Options), input validation on server actions/APIs, rate limits on sensitive routes.
• Ops: incremental static regeneration settings; warm critical routes; rollback strategy; smoke tests post-deploy.

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See Also

• React Basics Guide - Core React concepts and hooks fundamentals
• React Router Navigation Guide - Client-side routing with React Router
• JavaScript Fetch API Guide - Async/await patterns for data fetching
• JavaScript Fetch API Guide - HTTP requests and API communication
• Modern React Ecommerce Guide - Advanced React patterns with state management
• Modern Fullstack Guide - Next.js and fullstack development
• GraphQL Integration Guide - GraphQL implementation and best practices
• CI/CD Pipeline Guide - Deployment automation and testing