Basic React hook snippet.

```
<!-- begin snippet: js hide: false console: true babel: true -->

<!-- language: lang-js -->

    const {
      useState,
      useEffect
    } = React;

    function ExampleComponent(props) { 
      return <div>
          Hello World!
        </div>; 
    }

    const el = document.querySelector("#root");
    ReactDOM.render(<ExampleComponent/>, el);

<!-- language: lang-html -->

    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.8.6/umd/react.production.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.8.6/umd/react-dom.production.min.js"></script>

    <div id="root"></div>

<!-- end snippet -->
```