What is JSX?

JSX (JavaScript XML) is a syntax extension for JavaScript that allows developers to write HTML-like code in their JavaScript code. It is commonly used in React applications, where it is used to describe the structure of the user interface.

JSX allows developers to write HTML-like code directly in their JavaScript files. This code is then compiled by a build tool like Babel into regular JavaScript code that can be executed by a browser. JSX code can contain HTML tags, attributes, and expressions that are evaluated at runtime. For example, the following JSX code creates a simple component that displays a message:

import React from 'react';
function Welcome(props) {
  return <h1>Hello, {props.name}!</h1>;
}
export default Welcome;