Mini React Tactics - ReactDOM

Typically, this is the code in the index.js document.

```react import ReactDOM from 'react-dom';

// ... codes

ReactDOM.render( app, document.getElementById( 'root' ) ); ```

But this code also can be written in this way without using ReactDOM. ```react import {render} from 'react-dom';

// ... codes

render(,document.getElementById('root')); ```