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Does React use HTML or XML?

No, React does not use HTML or XML.

React is a JavaScript library used for building user interfaces (UIs). It enables developers to create reusable components that can be used with a variety of data sources, allowing them to develop complex interactive UIs quickly and easily. It does this by providing a declarative, component-based programming model for describing UIs.

Instead of relying on HTML or XML, React is written in JavaScript (specifically in the JavaScript version called JSX). It makes use of a syntax extension to JavaScript that allows React developers to write HTML-like syntax in their code (called JSX). This allows developers to express their code in a more readable and understandable format, which makes it easier to maintain complex UIs. This makes React very popular for creating UIs for front-end web applications.

React also utilizes JavaScript by providing its own set of components, which can be combined with HTML to create complex UI features. These components allow developers to define their own custom components and make use of various React lifecycle methods, such as componentDidMount and componentWillUnmount, which control the behavior of components.

React also utilizes JavaScript to establish the structure of the UI, allowing developers to create a more structured design. For example, with React, developers can easily define routes, create and use states, and apply various styling technique including the use of class and inline style attributes.

To summarize, React does not use HTML or XML; it is a JavaScript library used for building UIs that makes use of JSX and JavaScript to create and reuse components, establish the structure of the UI, and define routing and styling. React provides developers with a powerful, efficient, and easy-to-use way to create dynamic, interactive UIs for front-end web applications.