Components (Functional & Class)

Components (Functional & Class)

Components are reusable building blocks in React used to define UI elements. Functional components use hooks, while class components use lifecycle methods.

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JSX (JavaScript XML)

JSX allows writing HTML-like syntax in JavaScript, making UI code more readable. It gets transpiled to React.createElement() calls.

Props (Properties)

Props are inputs passed to components to make them dynamic and reusable. They are immutable and facilitate data flow from parent to child components.

State (useState, this.state)

tate is used to manage dynamic data within components. useState is for functional components, while this.state is used in class components.

Lifecycle Methods (Class Components)

Lifecycle methods (e.g., componentDidMount, componentWillUnmount) handle events during component creation and destruction. They help in API calls and cleanup.

Event Handling

React uses camelCase syntax for event handlers like onClick or onChange. Event handlers receive a synthetic event object.

Conditional Rendering

Conditional rendering allows components to display different content based on conditions. It can be done using if statements, ternary operators, or logical &&.

Lists & Keys

React efficiently renders lists using the map() function, with unique key props. Keys help React identify which items changed or need re-rendering.
Refs (useRef, React.createRef)

Refs (useRef, React.createRef)

Refs provide a way to directly access and manipulate DOM elements or React components. useRef is used in functional components, while createRef in class components.

 Fragments

React Fragments (<>...</>) allow grouping multiple elements without adding extra DOM nodes. This improves performance and avoids unnecessary wrappers.

Fragments

Fragments

Hooks (useState, useEffect, etc.)

Hooks let you use state and lifecycle features in functional components. Common hooks include useState, useEffect, and useContext.

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React.memo

React.memo is a higher-order component that optimizes functional components by preventing unnecessary re-renders. It checks if props have changed.

Context API

Context API provides a way to pass data through the component tree without using props manually at every level. It is used for global state management.

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Redux (State Management)

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Core Concepts

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React Hooks

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State Management

Redux (State Management)

Redux is a state management library for managing global application state in a predictable way. It follows a unidirectional data flow with actions and reducers.

React Router

Styled Components allow writing CSS within JavaScript using tagged template literals. They provide component-level styling without affecting global styles.

Styled Components

React Router provides navigation and routing functionalities for single-page applications (SPAs). It enables dynamic URL handling with components.

 

Styled Components

Styled Components allow writing CSS within JavaScript using tagged template literals. They provide component-level styling without affecting global styles.

Props (Properties)

Props are inputs passed to components to make them dynamic and reusable. They are immutable and facilitate data flow from parent to child components.

State (useState, this.state)

tate is used to manage dynamic data within components. useState is for functional components, while this.state is used in class components.

Lifecycle Methods (Class Components)

Lifecycle methods (e.g., componentDidMount, componentWillUnmount) handle events during component creation and destruction. They help in API calls and cleanup.

Styled Components

Styled Components allow writing CSS within JavaScript using tagged template literals. They provide component-level styling without affecting global styles.

Lazy Loading

Lazy loading allows components to load only when needed using React.lazy and Suspense. This reduces initial page load time and improves performance.

Error Boundaries

Error boundaries are special components that catch JavaScript errors in the component tree. They help prevent entire app crashes by handling errors gracefully.

Higher-Order Components (HOCs)

HOCs are functions that take a component and return an enhanced version of it. They are used for code reusability and logic abstraction.

Render Props

Render props is a pattern where a function is passed as a prop to a component. It allows component logic to be shared between different components.

React Testing Library

React Testing Library is a popular tool for testing React components by simulating user interactions and checking component behavior.

React Query

React Query simplifies server-state management by handling data fetching, caching, and synchronization with minimal boilerplate code.

React Native

React Native is a framework for building mobile applications using React. It allows code sharing between web and mobile platforms.

Next.js

Next.js is a React framework for server-side rendering (SSR), static site generation (SSG), and improved SEO performance.

Vite

Vite is a modern build tool that provides fast development with an optimized bundler for React applications.

Apollo Client (GraphQL)

Apollo Client helps manage and fetch GraphQL queries in React applications efficiently with caching and state management features.

React Helmet

React Helmet is used to manage document head tags, such as title and meta tags, for better SEO and dynamic updates.

Virtual DOM

React uses a virtual DOM to update the UI efficiently by comparing previous and current states, updating only changed elements.

Code Splitting

Code splitting helps split the application bundle into smaller chunks to improve loading speed using React.lazy and dynamic imports.

React Programming

1. Core Concepts

  • Components (Functional & Class)
  • JSX (JavaScript XML)
  • Props (Properties)
  • State (useState, this.state)
  • Lifecycle Methods (Class components)
  • Event Handling
  • Conditional Rendering
  • Lists & Keys
  • Refs (useRef, React.createRef)
  • Fragments

2. React Hooks

  • useState
  • useEffect
  • useContext
  • useRef
  • useReducer
  • useMemo
  • useCallback
  • Custom Hooks

3. State Management

  • Context API
  • Redux (Toolkit, Thunk, Saga)
  • Recoil
  • Zustand
  • MobX
  • Jotai
  • React Query

4. Routing

  • React Router (v6)
  • BrowserRouter
  • HashRouter
  • Route
  • Link
  • Outlet
  • Navigate
  • useParams
  • useNavigate
  • Protected Routes

5. Styling

  • CSS Modules
  • Styled Components
  • Emotion
  • Tailwind CSS
  • Bootstrap
  • Material-UI (MUI)
  • Sass/Less

6. Performance Optimization

  • React.memo
  • useMemo
  • useCallback
  • Virtual DOM
  • Lazy Loading (React.lazy, Suspense)
  • Code Splitting

7. Forms Handling

  • Controlled & Uncontrolled Components
  • Formik
  • React Hook Form
  • Yup (Validation)
  • Event Binding

8. Testing in React

  • Jest
  • React Testing Library
  • Enzyme
  • Cypress
  • Storybook

9. Advanced Concepts

  • Higher-Order Components (HOCs)
  • Render Props
  • Error Boundaries
  • Server-Side Rendering (SSR) – Next.js
  • Static Site Generation (SSG)
  • Hydration

10. React Ecosystem & Tools

  • Create React App (CRA)
  • Vite
  • Next.js
  • Remix
  • React Native
  • Webpack
  • Babel
  • ESLint & Prettier

11. APIs and Data Fetching

  • Fetch API
  • Axios
  • React Query
  • SWR
  • GraphQL (Apollo, Relay)
  • WebSockets

12. Deployment & Hosting

  • Netlify
  • Vercel
  • Firebase Hosting
  • AWS Amplify
  • Docker for React
  • CI/CD (GitHub Actions, Jenkins)

  • 13. React Architecture Patterns

    • Component-Based Architecture
    • Container-Presenter Pattern
    • Higher-Order Components (HOC)
    • Render Props Pattern
    • Atomic Design Pattern
    • Compound Components Pattern
    • Hooks Pattern
    • Monorepo vs Micro Frontend Architecture
    • State Lifting

    14. React Project Structure Best Practices

    • Folder Structure (Components, Hooks, Services, Utils)
    • Separation of Concerns (SoC)
    • Modular Component Design
    • Smart vs Dumb Components
    • Feature-Based Directory Structure
    • Code Splitting

    15. React with TypeScript

    • Prop Types vs TypeScript
    • Interfaces vs Types
    • React.FC (Functional Component)
    • useState<Type>
    • useRef with TypeScript
    • Generics in React
    • Type Guards
    • Enum & Union Types

    16. React Animations

    • Framer Motion
    • React Transition Group
    • React Spring
    • Lottie for React
    • GSAP (GreenSock Animation Platform)

    17. React and Backend Integration

    • REST API Integration
    • GraphQL with Apollo
    • WebSockets for Real-time Apps
    • Firebase Integration
    • Supabase Integration
    • Authentication (JWT, OAuth, Firebase Auth)
    • Backend-as-a-Service (BaaS)

    18. React Accessibility (a11y)

    • ARIA Attributes
    • Semantic HTML
    • React Helmet for SEO
    • Focus Management
    • Keyboard Navigation

    19. React Internationalization (i18n)

    • React-i18next
    • Format.js
    • Localization Strategies
    • Pluralization Handling
    • Date & Time Localization

    20. React DevTools & Debugging

    • React Developer Tools (Chrome/Firefox Extensions)
    • React Profiler
    • React Error Boundaries
    • Redux DevTools
    • Console Logging Best Practices
    • React Strict Mode

    21. React Security Best Practices

    • Avoid Direct DOM Manipulation
    • XSS (Cross-Site Scripting) Prevention
    • CSRF Protection
    • JWT Security
    • Code Obfuscation

    22. React Concurrent Mode

    • Automatic Batching
    • Transition API
    • Suspense for Data Fetching
    • Streaming SSR with Suspense
    • useTransition Hook

    23. React Server Components

    • Hybrid Rendering Approach
    • Mixing Client and Server Components
    • Data Fetching Strategies
    • Integration with Next.js

    24. React Workflows & Collaboration

    • GitHub/GitLab Workflows
    • Agile Methodologies
    • Code Reviews in React Projects
    • Component Libraries (Storybook, Bit.dev)
    • Design Systems (Chakra UI, MUI, Tailwind UI)

    25. React Package Management

    • NPM (Node Package Manager)
    • Yarn
    • PNPM
    • Dependency Management Strategies
    • Versioning and Upgrading React

    26. React Mobile Development

    • React Native
    • Expo Framework
    • Platform-Specific Code
    • Navigation in React Native (React Navigation)
    • Push Notifications in React Native

    27. React Static Site Generators (SSG)

    • Next.js Static Export
    • Gatsby.js
    • Astro
    • Performance Optimization in SSG

    28. React Micro Frontends

    • Module Federation
    • Independent Deployments
    • Communication Between Micro Frontends
    • Single SPA Framework

    29. React and AI/ML Integration

    • Integrating with TensorFlow.js
    • Using OpenAI APIs in React
    • Machine Learning Visualization Libraries
    • Charting Libraries (Recharts, D3.js)

    30. React and Blockchain Integration

    • Ethereum DApps with React
    • Web3.js and Ethers.js
    • Smart Contract Interactions
    • Metamask Integration