Introduction to React

What is React? React is a JavaScript library for building user interfaces. It was developed by Facebook (Meta) and is now open-source, widely used in web development. Why Use React? Component-Based Architecture – Build reusable UI components. Virtual DOM – Efficient updates for better performance. Declarative Syntax – Write cleaner and more readable code. Strong Community & Ecosystem – Large support with many libraries. Fast Learning Curve – Easy to get started, especially for JavaScript developers. How React Works React uses a Virtual DOM to optimize updates. It breaks UI into components, which manage their own state. React re-renders only the changed parts of the UI, improving performance. Basic Example of React Component import React from "react"; function Greeting() { return Hello, React!; } export default Greeting; When to Use React? Single Page Applications (SPA) Dynamic UI Updates (e.g., dashboards, social media feeds) Reusable UI Components (e.g., design systems)

Apr 1, 2025 - 01:41

What is React?

React is a JavaScript library for building user interfaces. It was developed by Facebook (Meta) and is now open-source, widely used in web development.

Why Use React?

Component-Based Architecture – Build reusable UI components.
Virtual DOM – Efficient updates for better performance.
Declarative Syntax – Write cleaner and more readable code.
Strong Community & Ecosystem – Large support with many libraries.
Fast Learning Curve – Easy to get started, especially for JavaScript developers.

How React Works

React uses a Virtual DOM to optimize updates.
It breaks UI into components, which manage their own state.
React re-renders only the changed parts of the UI, improving performance.

Basic Example of React Component

import React from "react";

function Greeting() {
  return <h1>Hello, React!h1>;
}

export default Greeting;

When to Use React?

Single Page Applications (SPA)
Dynamic UI Updates (e.g., dashboards, social media feeds)
Reusable UI Components (e.g., design systems)