REACT

What is React?

*React is a JavaScript library used for building user interfaces (UI), especially for web applications.

*It was originally developed by Facebook (now Meta). React helps you build a website using small, reusable pieces called components.

For example:

1.Navbar
2.Button
3.LoginForm
4.ProductCard
5.Footer

Simple Example:

function Welcome() {
return (
<div>
<h1>Hello, World!</h1>
<p>Welcome to my React application.</p>
</div>
);
}

export default Welcome;

Why do we use React?

The main reason is that modern websites often need to change their UI dynamically without reloading the entire page.

Important React concepts:

Component - Reusable piece of UI
JSS - Syntax that lets you write HTML-like code in JavaScript
Props - Data passed from one component to another
State - Data that can change while the application is running
Hooks - Functions such as useState and useEffect that add functionality to components
Virtual DOM - React's mechanism for efficiently updating the UI