Learn React

Introduction

The “Learn React” series on C# Corner is a complete, structured, and practical learning path designed for developers who want to build professional React applications—from the fundamentals to advanced concepts and production-ready patterns.

Each lesson includes real-world examples, step-by-step explanations, and links to relevant challenges, certifications, and articles to deepen your understanding and validate your skills.

Series Structure Overview

Lesson 1: Introduction to React

An overview of React, its features, and how it differs from traditional JavaScript frameworks. Covers the core idea of component-based architecture, declarative UI, and virtual DOM.
You will set up your first React project using Create React App and understand the folder structure.

Lesson 2: JSX and Rendering

Introduces JSX syntax, how it translates into React elements, and how React efficiently updates the DOM.
Includes examples of rendering components, using expressions, and organizing UI structure.

Lesson 3: Components and Props

Explains functional and class components, the concept of reusability, and how to pass data between components using props.
You will build simple reusable components and learn how props help in dynamic UI rendering.

Lesson 4: State and Lifecycle

Covers the concept of component state, differences between state and props, and lifecycle methods.
You will learn how React updates the UI when state changes and explore useState and useEffect hooks.

Lesson 5: Handling Events in React

Shows how React handles DOM events like clicks, inputs, and form submissions.
Teaches event binding, passing parameters, and best practices for writing clean, predictable event handlers.

Lesson 6: Conditional Rendering and Lists

Explains how to conditionally display UI based on state or logic, and how to efficiently render lists using the map() method and unique keys.

Lesson 7: Forms and User Input

Focuses on managing form inputs, controlled vs. uncontrolled components, and handling form submission in React applications.
Includes validation examples and best practices for real-world forms.

Lesson 8: React Router and Navigation

Introduces client-side routing using React Router.
Covers BrowserRouter, Routes, Link, and nested routes to create multi-page applications with smooth navigation.

Lesson 9: Context API and State Management

Teaches how to manage the global state using React Context API.
You will learn how to avoid prop drilling, set up context providers, and consume context efficiently across components.

Lesson 10: Advanced Hooks

A deep dive into React hooks, including useReducer, useContext, useRef, and useLayoutEffect.
Includes practical scenarios showing when to use each hook and how they improve code organization.

Lesson 11: Custom Hooks

Explains how to extract and reuse logic using custom hooks.
You will create reusable hooks for fetching data, handling forms, and managing toggles, making your code more modular.

Lesson 12: Performance Optimization in React

Focuses on improving rendering efficiency and overall performance.
Covers React.memo, useMemo, and useCallback, lazy loading, and list virtualization with real-world use cases and best practices.

Lesson 13: Error Boundaries and Error Handling

Teaches how to prevent your React app from crashing by catching and displaying fallback UI when errors occur.
Explains how to create custom error boundaries, handle async errors, and integrate error logging.

Lesson 14: React Suspense and Lazy Loading

Covers the concept of code splitting and component-level lazy loading using React.lazy() and Suspense.
Demonstrates how to optimize initial load times and improve user experience by dynamically loading components.

Lesson 15: Testing in React (Unit and Integration Testing)

Introduces testing using Jest and React Testing Library.
You will write unit tests for components, integration tests for interactions, and learn how to mock APIs for predictable results.

Lesson 16: React with TypeScript

Shows how to integrate TypeScript for type safety and improved reliability.
Covers typing props, state, events, hooks, and context, and explains how TypeScript prevents common runtime errors in React projects.

Lesson 17: React Design Patterns and Best Practices

Explores scalable React architecture and patterns, including:

  • Container and Presentational Components

  • Higher-Order Components (HOC)

  • Custom Hooks

  • Render Props

  • Compound Components
    It also discusses folder structure, code reuse, and performance best practices.

Lesson 18: Building a Real-World React Project

A capstone project that combines all previous lessons into a functional React dashboard application.
You will implement routing, global context, lazy loading, error handling, custom hooks, and testing within a clean, scalable TypeScript setup.

Learning Outcomes

After completing the “Learn React” series, you will be able to:

  • Build full-featured, production-grade React applications.

  • Write modular, reusable, and testable components.

  • Manage state and data flow using hooks and context.

  • Implement professional-level architecture and design patterns.

  • Integrate TypeScript for stronger typing and scalability.

  • Optimize performance and ensure reliability through testing.

Next Steps

Test Your Knowledge:

Get Certified:

Explore More Articles:

Summary

The C# Corner Learn React Series is designed to help you progress from beginner to advanced levels in a structured, step-by-step format.

Each lesson builds upon the previous one, ensuring you not only understand React concepts but can also apply them in real-world applications.

By completing this series and the associated challenges, you will have a complete understanding of React’s ecosystem and be ready to build, test, and deploy modern front-end applications with confidence.