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Learn/React/React Core
React•React Core

React Tutorial

Learn React

React is a JavaScript library for building user interfaces.

React is used to build single-page applications.

React allows us to create reusable UI components.

Our "Show React" tool makes it easy to demonstrate React. It shows both the code and the result.

Example

import { createRoot } from 'react-dom/client';
function Hello() {
 return ( <h1>Hello World!</h1> );
}
createRoot(document.getElementById('root')).render( <Hello /> );

Next

React Introduction