Why import like this import React from 'react' without explicitly using React?

  • Because JSX was trans-compiled like React.createElment(...)

How to use React with Babel in a single HTML page?

What’s the difference between React Router v4 and earlier version? How to install?

What’s the difference between Material UI v0.x and v1?

How does HMR works, and how to get it with create-react-app and react-router?