JSX stands for JavaScript XML. JSX allows us to write HTML elements in JavaScript and place them in the DOM without any document.getElementById(), createElement() or appendChild() methods. JSX is faster than normal JavaScript language. JSX is used to convert HTML tags into react elements.

JSX is not mandatory to use there are other languages to develop react applications. But programmers find it easy to use JSX to develop react applications.

JSX allows writing expressions in curly brackets { }. The expression can be any JS expression or React variable.

JSX is much closer to JavaScript than to HTML, it uses camelCase notation for naming convention.

For example, class becomes className in JSX, and tabindex becomes tabIndex.

JSX elements must be closed using /.

We can get Hello World on the screen by writing the code. for example

The index.html file must have a div with id="root" and append by using the following code within index.js file.

const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(
    <p>Hello World</p>
);

The output we got