How to use the pdfjs-dist/lib/web/pdf_link_service.PDFLinkService function in pdfjs-dist

// import * as pdfjsViewer from 'pdfjs-dist/lib/web/pdf_viewer';
        // import * as pdfjsLinkService from 'pdfjs-dist/lib/web/pdf_link_service';
        // import * as pdfjsFindController from 'pdfjs-dist/lib/web/pdf_find_controller';

        const pdfjsLib = require('pdfjs-dist/build/pdf');
        const pdfjsViewer = require('pdfjs-dist/lib/web/pdf_viewer');
        const pdfjsLinkService = require('pdfjs-dist/lib/web/pdf_link_service');
        const pdfjsFindController  = require('pdfjs-dist/lib/web/pdf_find_controller');

        const container = document.getElementById('viewerContainer');

        if (! container) {
            throw new Error("No container");
        }

        const pdfLinkService = new pdfjsLinkService.PDFLinkService();
        const pdfFindController = new pdfjsFindController.PDFFindController({
            linkService: pdfLinkService,
        });
        //

        // FIXME: I think I ahve to specify a custom RenderingQueue here because right now it renders ALL the pages...
        // and I need to limit this to say += 10 pages..

        // FIXME: how do we change the zoom

        // FIXME: how do we render the thumbnails

        // FIXME: the textarea overlay isn't setup to work

        const pdfElement = new pdfjsViewer.PDFViewer({
            container: container,

pdfRender = pdfPage.render({
				canvasContext: canvasElt.getContext('2d'),
				viewport: viewport
			});

			annotationLayerElt.style.visibility = 'hidden';
			clearAnnotations();

			var viewer = {
				scrollPageIntoView: function(params) {
					emitEvent('link-clicked', params.pageNumber)
				},
			};

			var linkService = new PDFLinkService();
			linkService.setDocument(pdfDoc);
			linkService.setViewer(viewer);

			pdfPage.getAnnotations({ intent: 'display' })
			.then(function(annotations) {

				PDFJS.AnnotationLayer.render({
					viewport: viewport.clone({ dontFlip: true }),
					div: annotationLayerElt,
					annotations: annotations,
					page: pdfPage,
					linkService: linkService,
					renderInteractiveForms: false
				});
			});