Use DsPdfViewer to view PDF in a React App

import * as React from 'react';
import * as ReactDOM from 'react-dom';
import './app.css';
import {DsPdfViewer} from '@mescius/dspdfviewer';
import '/document-solutions/javascript-pdf-viewer/demos/resource/js/init.js';

class App extends React.Component {
	
	_viewer;
	
    constructor(props) {
        super(props);
        
    }

	componentDidMount() {
		const root = ReactDOM.findDOMNode(this);		
		const viewer = new DsPdfViewer(root, {
			workerSrc: "/document-solutions/javascript-pdf-viewer/demos/product-bundles/build/dspdfviewer.worker.js"
		});
		viewer.addDefaultPanels();
		viewer.open("/document-solutions/javascript-pdf-viewer/demos/product-bundles/assets/pdf/helloworld.pdf");
		this._viewer = viewer;
	}
	
	componentWillUnmount() {
		if(this._viewer) {
			this._viewer.dispose();
			this._viewer = null;
		}
	}

	
    render(){
        return <div id="viewer"></div>
    }
}
ReactDOM.render(<App />, document.getElementById('app'));