- npx create-react-app folder-name
- cd folder-name
- code .
- App.test.js
- reportWebVital.js
- setupTest.js
import reportWebVitals from './reportWebVitals'; // If you want to start
measuring performance in your app, pass a function // to log results (for
example: reportWebVitals(console.log)) // or send to an analytics endpoint.
Learn more: https://bit.ly/CRA-vitals reportWebVitals();- Ctrl + Alt + R
- Type
_rafceWhich creates a React Arrow function component with ES7 module system