To get an overview of what React is, you can write React code directly in HTML. ```html

``` *the first two let us write React code in our JavaScripts, and the third, Babel, allows us to write JSX syntax and ES6 in older browsers. --- But in order to use React in production, you need npm and Node.js installed. Run this command to create a React application: `$ npx create-react-app app_name` `$ cd my-react-app` `$ npm start` then open `localhost:3000` in browser --- how to change the content: Inside the `src/` directory there is a file called `App.js`, open it and it will look like this: ```javascript import logo from './logo.svg'; import './App.css'; function App() { return (

Edit src/App.js and save to reload.

Learn React

); } export default App; ``` you can make your changes to this file to edit main page.
here's the most basic style when you remove every removable part: ```javascript function App() { return (

Hello World!

); } export default App; ``` --- to update the react version to latest in project: `$ npm i react@latest react-dom@latest` ---

React Qiuck Note

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