Introduction to React

React is a popular JavaScript library for building user interfaces. It was developed by Facebook and is widely used in frontend development.

React follows a component-based architecture, where each UI element is represented as a reusable component. This makes it easier to manage and update different parts of the user interface independently.

One of the main features of React is its use of a virtual DOM (Document Object Model), which allows for efficient updating and rendering of components. React only updates the parts of the UI that have changed, resulting in improved performance.

React is often used in conjunction with other frontend technologies, such as HTML, CSS, and JavaScript. It can be integrated with frameworks like Next.js or used in combination with server-side rendering.

To get started with React, you'll need to set up a new React project and install the necessary dependencies. Once your project is set up, you can start building your UI using React components.

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import React from 'react';

​

function App() {

  return (

    <div>

      <h1>Welcome to React</h1>

      <p>React is a JavaScript library for building user interfaces.</p>

    </div>

  );

}

​

export default App;