Understanding JSX in React: History, Features, and Examples

JSX (JavaScript XML) is a syntax extension for JavaScript used in React to describe UI structures in a way that resembles HTML. It simplifies writing and understanding React components by allowing developers to write declarative UI code inside JavaScript. JSX was introduced with React by Facebook in 2013 as a way to simplify UI development. Before JSX, React components were created using the React.createElement function, which was cumbersome and less readable. JSX emerged as a solution to provide a more intuitive way to describe UI components while still leveraging JavaScript's power. JSX is not understood by browsers directly and gets compiled by Babel into regular JavaScript before execution. JSX allows embedding JavaScript expressions, using custom React components, adding attributes, conditional rendering, handling events, and rendering lists dynamically. Using JSX improves readability, prevents XSS attacks, and provides a better developer experience. Understanding JSX is essential for building React applications efficiently. JSX is a core part of React that enhances the way developers create UI components.