Import ReactDOM

In order to create our first component, we next imported the ReactDOM:

import ReactDOM from 'react-dom';

This line of code is very similar to line 1.

Both import JavaScript objects. In both lines, the imported object contains React-related methods.

However, there is a difference!

The methods imported from 'react-dom' are meant for interacting with the DOM. You are already familiar with one of them: ReactDOM.render().

The methods imported from 'react' don’t deal with the DOM at all. They don’t engage directly with anything that isn’t part of React.

To clarify: the DOM is used in React applications, but it isn’t part of React. After all, the DOM is also used in countless non-React applications. Methods imported from 'react' are only for pure React purposes, such as creating components or writing JSX elements.

Instructions

1.Import the ReactDOM library on line 2. Store the result in a variable named ReactDOM.

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