React Basics

• React is a powerful JavaScript library for building fast, scalable front-end applications. Created by Facebook, it's known for its component-based structure, single-page applications (SPAs), and virtual DOM, enabling efficient UI updates and a seamless user experience.

• You need npm to create a project. npm stands for node package manager.

1. React is JavaScript library.

2. Used to create single page applications.

3.Allows for the creation of reusable UI components.

Importance of React
Before React, front-end development struggled with:

• Manual DOM Manipulation: Traditional JavaScript directly modified the DOM, slowing down the performance.

• Complex State Management: Maintaining UI state became messy and hard to debug.

• Tight Coupling in Frameworks: Frameworks like Angular introduced complex two-way data binding that made code harder to manage.

Core Features

• Virtual DOM: React updates only the changed parts of the DOM, resulting in faster rendering.

• One-Way Data Binding: Ensures predictable and easy to debug data flow.

• Component-Based Architecture: Breaks UI into reusable pieces, improving the code reusability and scalability.

Sample Program

import React from 'react';

function App() {
    return (
        <div>
            <h1>Hello World</h1>
        </div>
    );
}

export default App;