ReactJS

1. Foundations of ReactJS

2. Components in React

3. Component Lifecycle & Hooks

4. Event Handlers in React

5. State Management Libraries

4. React State Patterns

• Lifting State Up
  • Sharing state between parent-child components
• Prop Drilling
  • Passing props deeply through nested components
• Context API
  • Global state management without prop drilling
  • useContext and Context.Provider
• State Management Libraries
  • Redux (for larger applications)
  • Zustand or Recoil (simpler alternatives)

5. React Router

• React Router Basics
  • Setting up routes using react-router-dom
  • Nested routes
  • Redirects, useNavigate
• Dynamic Routing
  • Route parameters, query strings
  • Programmatically navigating

6. Advanced React Concepts

• React Reconciliation
  • How React updates the DOM (Virtual DOM)
  • Key prop and rendering optimization
• React Fiber
  • The architecture behind React’s rendering (optional deep dive)
• Error Boundaries
  • Catching JavaScript errors in components
• Suspense and React.lazy
  • Code-splitting and lazy loading components
• Portals
  • Rendering components outside of the DOM hierarchy

7. Performance Optimization

• React Memo
  • Memoizing components to prevent unnecessary re-renders
• useCallback, useMemo
  • Memoizing functions and values
  • When to use useMemo vs useCallback
• Virtualization
  • Using libraries like react-window or react-virtualized for large lists
• Code Splitting
  • Dynamic imports and lazy loading components

8. Forms and Validation

• Controlled Components
  • Managing form state with React
• Form Libraries
  • Formik or React Hook Form
• Validation
  • Validation using libraries like Yup or Zod

9. React Ecosystem & Tools

• TypeScript with React
  • Defining props and state types
  • Type inference, generics, and utility types
• CSS-in-JS
  • Styled Components, Emotion, or Tailwind CSS
• Testing
  • Unit Testing with Jest and React Testing Library
  • End-to-End Testing with Cypress
• State Management Tools
  • Redux Toolkit (modern approach)
  • Middleware (Redux Thunk or Redux Saga)

10. Server-Side Rendering & Static Generation

• Next.js
  • Introduction to Next.js framework
  • SSR (Server-Side Rendering) and SSG (Static Site Generation)
  • Incremental Static Regeneration (ISR)
  • API routes and serverless functions in Next.js

11. React and GraphQL

• GraphQL Basics
  • Writing queries, mutations, and subscriptions
• Apollo Client
  • Using Apollo Client to fetch data in React
  • Caching, pagination, and optimistic updates

12. Real-World Applications & Advanced Topics

• Authentication
  • Implementing JWT or OAuth authentication
• WebSockets and Real-time Updates
  • Integrating WebSockets for real-time features
• Progressive Web Apps (PWAs)
  • Service workers and offline capabilities
• React Native (optional)
  • Building mobile apps with React Native

13. DevOps & Deployment

• Build Tools & Bundling
  • Webpack, Vite, or Parcel
• CI/CD
  • Setting up Continuous Integration with GitHub Actions, Travis CI, etc.
• Deploying React Apps
  • Deploying on platforms like Vercel, Netlify, or AWS S3