create first app and install React

Open cmd
Create a folder for the projects
Cd projects
Use create-react-app to install React. This command will install all the dependecies to run the React program.

npx create-react-app hello

npx is the package runner used by npm to execute packages in place of a global install. It basically creates a temporary install of React so that with each new project you are using the most recent version of React (not whatever version was current when you performed the global install above). Using the NPX package runner to execute a package can also help reduce the pollution of installing lots of packages on your machine.

Now cd into hello project folder

Run Hello project

Run the command npm start

npm start

This command will start up the Node.js server and launch a new browser window displaying your app. Use Ctrl + c to stop running the React app in command line.

Compiled successfully!

You can now view hello in the browser.

  Local:            http://localhost:3000
  On Your Network:  http://172.22.32.1:3000

Note that the development build is not optimized.
To create a production build, use npm run build.

webpack compiled successfully

Open the web browser, you can see the React hello page.