React Front-End Development

Overview

React is a JavaScript library for building user interfaces with reusable components. It enables developers to create fast, interactive, and maintainable web applications.

What You'll Learn

• React fundamentals and JSX
• Components (functional and class-based)
• State and props
• Hooks (useState, useEffect, useContext)
• Event handling
• Conditional rendering
• Lists and keys
• Forms and controlled components
• API integration
• Routing with React Router
• State management

Key Topics

React Basics

• Components and JSX syntax
• Functional components
• Rendering and re-rendering

State & Props

• Managing component state
• Passing data with props
• Component composition

Hooks

• useState for state management
• useEffect for side effects
• Custom hooks
• Context API for global state

Advanced Concepts

• Component lifecycle
• Performance optimization
• Error boundaries
• Code splitting

Getting Started

Basic React component:

import React, { useState } from 'react';

function Counter() {
    const [count, setCount] = useState(0);

    return (
        <div>
            <p>Count: {count}</p>
            <button onClick={() => setCount(count + 1)}>
                Increment
            </button>
        </div>
    );
}

export default Counter;

Project Structure

A typical React app structure:

src/
├── components/
│   ├── Header.jsx
│   ├── Footer.jsx
│   └── Home.jsx
├── pages/
│   ├── Dashboard.jsx
│   └── Profile.jsx
├── hooks/
│   └── useAuth.js
├── services/
│   └── api.js
├── App.jsx
└── index.js

Next Steps

Build complete full-stack applications by combining React frontend with Node.js/Express backend and MongoDB database.