PDFJS

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.2.0/require.js"></script>
<canvas id='the-canvas'></canvas>

JavaScript

requirejs.config({
  paths: {
    'pdfjs-dist/build/pdf': 'https://rawgit.com/mozilla/pdfjs-dist/master/build/pdf',
    'pdfjs-dist/build/pdf.worker': 'https://rawgit.com/mozilla/pdfjs-dist/master/build/pdf.worker',
    'pdfjs-dist/web/pdf.components': 'https://rawgit.com/mozilla/pdfjs-dist/master/web/pdf_viewer'
  }
});

require(['pdfjs-dist/build/pdf', 'pdfjs-dist/build/pdf.worker', 'pdfjs-dist/web/pdf.components'], function(pdfjs) {
  console.log(pdfjs)
    // In production, change this to point to the built `pdf.worker.js` file.
    //global.PDFJS.workerSrc = '../../src/worker_loader.js';

  // Fetch the PDF document from the URL using promises.
  pdfjs.getDocument('https://rawgit.com/mozilla/pdf.js/master/test/pdfs/tracemonkey.pdf').then(function(pdf) {
    // Fetch the page.
    pdf.getPage(2).then(function(page) {
      var scale = 1.5;
      var viewport = page.getViewport(scale);

      // Prepare canvas using PDF page dimensions.
      var canvas = document.getElementById('the-canvas');
      var context = canvas.getContext('2d');
      canvas.height = viewport.height;
      canvas.width = viewport.width;

      // Render PDF page into canvas context.
      var renderContext = {
        canvasContext: context,
        viewport: viewport
      };
      page.render(renderContext);
    });
  });
});