Some test text!

Search
Hamburger Icon

Faster PDF Viewing with Optimized PDFs

See a side-by-side comparison of a PDF viewer rendering an unoptimized PDF vs an optimized PDF using this JavaScript sample. Optimized PDFs render in viewers faster, giving users access to even large and complex PDF documents in seconds. This sample works on all browsers (including IE11) and mobile devices without using plug-ins. Learn more about our JavaScript PDF Library.

Get Started Samples Download

To run this sample, get started with a free trial of Apryse SDK.

JavaScript

HTML

const FILES = {
  'demo-annotated.pdf': ['../../../samples/files/demo-annotated-non-optimized.pdf', '../../../samples/files/demo-annotated.pdf'],
  'construction-drawing-final.pdf': ['../../../samples/files/construction-drawing-final.pdf', '../../../samples/files/construction-drawing-optimized.pdf'],
  'cheetahs.pdf': ['../../../samples/files/cheetahs-non-optimized.pdf', '../../../samples/files/cheetahs.pdf'],
  'magazine.pdf': ['https://pdftron.s3.amazonaws.com/downloads/pl/magazine.pdf', 'https://pdftron.s3.amazonaws.com/downloads/pl/magazine-optimized.pdf'],
  'webviewer-demo.pdf': ['https://pdftron.s3.amazonaws.com/downloads/pl/webviewer-demo.pdf', 'https://pdftron.s3.amazonaws.com/downloads/pl/webviewer-demo-optimized.pdf'],
};

const _selected = localStorage.getItem('__selectedFiles');
const _selectedFiles = FILES[_selected];

const firstPdf = _selectedFiles ? _selectedFiles[0] : null;
const secondPdf = _selectedFiles ? _selectedFiles[1] : null;
const firstPdfUrl = localStorage.getItem('__firstPdfUrl');
const secondPdfUrl = localStorage.getItem('__secondPdfUrl');
const isFullAPI = localStorage.getItem('__isFullAPI') || false;

let sourceOne;
let sourceTwo;

if (firstPdfUrl && secondPdfUrl) {
  document.getElementById('url').value = firstPdfUrl;
  document.getElementById('url2').value = secondPdfUrl;
  sourceOne = firstPdfUrl;
  sourceTwo = secondPdfUrl;

  document.getElementById('select1').value = undefined;
} else {
  const defaultSelected = 'cheetahs.pdf';
  const _selectedFiles = FILES[defaultSelected];
  sourceOne = firstPdf || _selectedFiles[0];
  sourceTwo = secondPdf || _selectedFiles[1];

  document.getElementById('select1').value = _selected || defaultSelected;
}
document.getElementById('isFullAPI').checked = isFullAPI;

const timerOne = Date.now();
const timerTwo = Date.now();

// ============== WebViewer setup =============
WebViewer(
  {
    path: '../../../lib',
    initialDoc: sourceOne,
    fullAPI: isFullAPI,
  },
  document.getElementById('middlePanel')
).then(instance => {
  instance.Core.documentViewer.addEventListener('documentLoaded', () => {
    const timerOneFinish = Date.now();
    console.log('The first viewer', timerOneFinish - timerOne);
  });
});

WebViewer(
  {
    path: '../../../lib',
    initialDoc: sourceTwo,
    fullAPI: isFullAPI,
  },
  document.getElementById('leftPanel')
).then(instance => {
  instance.Core.documentViewer.addEventListener('documentLoaded', () => {
    const timerTwoFinish = Date.now();
    console.log('The second viewer', timerTwoFinish - timerTwo);
  });
});

// ============== End WebViewer setup =============

// ============== Setup input controllers =============
document.getElementById('selectControl').onclick = e => {
  e.preventDefault();
  const select1 = document.getElementById('select1');
  const selected = select1.options[select1.selectedIndex].value;

  localStorage.setItem('__selectedFiles', selected);
  localStorage.removeItem('__firstPdfUrl');
  localStorage.removeItem('__secondPdfUrl');
  location.reload();
};

document.getElementById('url-form').onsubmit = e => {
  e.preventDefault();
  const firstPdf = document.getElementById('url').value;
  const secondPdf = document.getElementById('url2').value;

  localStorage.setItem('__firstPdfUrl', firstPdf);
  localStorage.setItem('__secondPdfUrl', secondPdf);

  localStorage.removeItem('__selectedFiles');
  location.reload();
};

document.getElementById('isFullAPI').onchange = e => {
  if (e.target.checked) {
    localStorage.setItem('__isFullAPI', true);
  } else {
    localStorage.removeItem('__isFullAPI');
  }
};