React

React is a JavaScript library for building user interfaces using a component-based architecture. It enables declarative UI development for web and mobile applications.

Key Features

• Declarative views - Design simple views for each state, React handles efficient updates
• Component-based architecture - Build encapsulated components with their own state
• Virtual DOM - Efficient rendering through React's reconciliation algorithm
• JSX syntax - HTML-like syntax for describing UI components
• Cross-platform - Works on web, server (Node.js), and mobile (React Native)
• Unidirectional data flow - Predictable state management through props and state

Installation

Install React in your project:

npm install react react-dom

For new projects, use a framework like Next.js or Vite:

npx create-next-app@latest my-app
# or
npm create vite@latest my-app -- --template react

Basic Usage

import { createRoot } from 'react-dom/client';

function HelloMessage({ name }) {
  return <div>Hello {name}</div>;
}

const root = createRoot(document.getElementById('container'));
root.render(<HelloMessage name="Taylor" />);

Notable Details

• License: MIT
• Language: JavaScript
• Community: 244k+ GitHub stars, massive ecosystem
• Maintainer: Meta (Facebook)
• Documentation: Comprehensive guides at react.dev