how to start react environmnet code example

Example 1: install react js

npx create-react-app <appname>  //  eg:  npx create-react-app blog
cd <appname>  // cd blog
npm start  //runs on localhost:3000

Example 2: react create app

npx create-react-app my-app
cd my-app
npm start

Example 3: create react app

yarn add create-react-app OR npm install create-react-app
npx create-react-app my-app
cd my-app
npm start