What is React

React is a popular JavaScript library for building user interfaces, specifically for single-page applications where you can create reusable UI components. It was developed by Facebook and is maintained by Facebook and a community of individual developers and companies. React allows developers to build web applications that can change data, without reloading the page. Its key feature is the use of a virtual DOM which optimizes rendering and improves performance.

React has a component-based architecture, meaning that the UI is divided into independent, reusable parts that can be composed to create complex interfaces. This makes it easier to manage and scale applications.

Here's a basic example of a React component:

import React from 'react'; function Greeting(props) { return

Hello, {props.name}!

; } export default Greeting;

JavaScript React UI Components Virtual DOM Single-Page Applications

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