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What is the use of data-reactid attribute in HTML ?

What are the advantages of using JSX in ReactJS ?

Last Updated : 10 Nov, 2023

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JavaScript XML or JSX is an extension of the JavaScript language syntax. The React library is an extension to write XML-like code for elements and components. JSX tags have a tag name, attributes, and children.

Although JSX is not a necessity to write React applications, it is extremely beneficial as it makes React code simpler and elegant.

Syntax:

{/* Using JSX*/}
<div className="App">GeeksforGeeks</div>;

// Without JSX
React.createElement(
    "div",
    { className: "App" },
    "GeeksforGeeks"
);

Advantages of using JSX in React JS :

JSX helps us keep our code simpler and elegant when writing large pieces of code.
According to the React docs, most people find it helpful as a visual aid when working with UI inside the JavaScript code.
JSX also allows React to show more useful error and warning messages.
If one is familiar with HTML, it is quite easy to use JSX when building React application
Faster than normal JavaScript as it performs optimizations while translating to regular JavaScript.

Steps to Create React Application:

Step 1: Create a React application using the following command:

npx create-react-app example

Step 2: After creating your project folder i.e. example, move to it using the following command:

cd example

Project Structure:

Example: This example implements two same components using one with JSX and other without JSX.

Javascript

// Filename - App.js
 
import React from "react";
import Jsx from "./Components/Jsx";
import Nojsx from "./Components/Nojsx";
 
export default function App() {
    return (
        <div className="App">
            <Jsx />
            <Nojsx />
        </div>
    );
}

Javascript

// Filename - Components/Nojsx.js
 
import React from "react";
 
const Nojsx = () => {
    return React.createElement(
        "div",
        { id: "Nojsx", className: "GfgClass" },
        React.createElement("h1", null, "Welcome to GFG")
    );
};
 
export default Nojsx;

Javascript

// Filename - Components/Jsx.js
 
import React from 'react'
 
const Jsx = () => {
    return (
        <div className ='GfgClass'>
        <h1>Welcome to GFG</h1>
        </div>
    )
} 
 
export default Jsx

Step to Run Application: Run the application using the following command from the root directory of the project:

npm start

Output: Now open your browser and go to http://localhost:3000/, you will see the following output:

Output

What is the use of data-reactid attribute in HTML ?

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Article Tags :

ReactJS
Web Technologies
React-Questions

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