JSX (JavaScript XML) is a syntax extension used in React for creating and rendering components. It allows you to write HTML-like code within JavaScript, making it easier to define the structure and appearance of your UI components. JSX is not mandatory in React, but it is a popular choice due to its simplicity and readability.

Here’s an explanation of JSX with examples:

Basic JSX Syntax:
JSX looks similar to HTML but is actually JavaScript. It allows you to use HTML tags and components in your code.

const element = <h1>Hello, Abhishek!</h1>;

In the example above, we define a JSX element using angle brackets ( and). The content within the tags is treated as text.

Embedding Expressions:
JSX allows you to embed JavaScript expressions within curly braces {}.

const name = 'abhishek';
const element = <h1>Hello, {name}!</h1>;

In this example, the value of the name variable is embedded within the JSX element.

Using JSX with JavaScript Functions:
JSX can be used with JavaScript functions to define components.

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

Here, we define a functional component Greeting that returns a JSX element.

JSX Elements and Attributes: JSX allows you to define custom HTML-like tags and assign attributes to them.

const element = <img src="image.jpg" alt="Image" />;

In this example, we create an img tag with src and alt attributes.

JSX and Component Composition: JSX allows you to compose multiple components together.

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

	function App() {
	  return (
		<div>
		  <Greeting />
		  <p>Welcome to my app.</p>
		</div>
	  );
	}

Here, we define a component App that renders the Greeting component along with a p tag

By Abhishek Singh

Software Engineer at Cotocus pvt. ltd

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