HTML & CSS: Semantic HTML, Flexbox, Grid, responsive design.
JavaScript (ES6+):
Variables (let, const)
Arrow functions
Template literals
Destructuring & spread/rest operators
Array methods (map, filter, reduce)
Classes & modules (import/export)
Promises, async/await
React Basics
Setting up React projects (Vite, Create React App, Next.js starter).
JSX: Writing HTML in JavaScript.
Components: Functional vs. Class components.
Props: Passing data between components.
State: Using useState.
Event handling in React.
Conditional rendering (if, ternary, logical &&).
Lists & keys (rendering arrays in React).
Intermediate React Concepts
Hooks:
useEffect (side effects, lifecycle simulation)
useRef (DOM references & mutable values)
useContext (context API for state sharing)
Component composition & reusability.
Controlled vs. uncontrolled components (forms).
React Router (navigation and routing).
Prop drilling vs. Context API.
State Management
Context API (basic state sharing).
Redux (concepts: actions, reducers, store, middleware).
Redux Toolkit (modern Redux with less boilerplate).
Alternatives: Zustand, Recoil, Jotai, MobX.
Advanced React
Performance optimization:
React.memo
useCallback & useMemo
Lazy loading & code splitting (React.lazy, Suspense)
Error boundaries.
Portals.
Custom hooks.
Testing React apps:
Unit testing with Jest
React Testing Library / Enzyme
React Ecosystem
Next.js: Server-side rendering (SSR), static site generation (SSG), API routes.
React Query (TanStack Query): Data fetching and caching.
Apollo Client (for GraphQL APIs).
Styling in React:
CSS Modules
Styled-components / Emotion
Tailwind CSS
Real-World Practices
Project structuring and scalable folder organization.
TypeScript with React.
Authentication & authorization (JWT, OAuth, Firebase).
Working with REST & GraphQL APIs.
CI/CD pipelines for React apps.
Deployment: Vercel, Netlify, AWS, Docker.
Mastery & Beyond
Concurrent rendering & React Fiber architecture.
Suspense for data fetching.
Server Components (React 18+).
Micro-frontends with React.
Contributing to open-source React projects.
Mastering React is a journey that moves from the essentials of JavaScript and components to advanced techniques like state management, performance tuning, and ecosystem integration. By following this roadmap, you will gradually develop the ability to build professional, scalable, and production-ready applications. Keep practicing through projects, stay updated with new React releases, and explore real-world challenges to achieve deep expertise.
