pdf.js/examples/learning/helloworld.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>'Hello, world!' example</title>
</head>
<body>

<h1>'Hello, world!' example</h1>

<canvas id="the-canvas" style="border: 1px solid black; direction: ltr;"></canvas>

<script src="../../node_modules/pdfjs-dist/build/pdf.js"></script>

<script id="script">
  //
  // If absolute URL from the remote server is provided, configure the CORS
  // header on that server.
  //
  var url = './helloworld.pdf';

  //
  // The workerSrc property shall be specified.
  //
  pdfjsLib.GlobalWorkerOptions.workerSrc =
    '../../node_modules/pdfjs-dist/build/pdf.worker.js';

  //
  // Asynchronous download PDF
  //
  var loadingTask = pdfjsLib.getDocument(url);
  loadingTask.promise.then(function(pdf) {
    //
    // Fetch the first page
    //
    pdf.getPage(1).then(function(page) {
      var scale = 1.5;
      var viewport = page.getViewport({ scale: scale, });
      // Support HiDPI-screens.
      var outputScale = window.devicePixelRatio || 1;

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

      canvas.width = Math.floor(viewport.width * outputScale);
      canvas.height = Math.floor(viewport.height * outputScale);
      canvas.style.width = Math.floor(viewport.width) + "px";
      canvas.style.height =  Math.floor(viewport.height) + "px";

      var transform = outputScale !== 1
        ? [outputScale, 0, 0, outputScale, 0, 0]
        : null;

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

<hr>
<h2>JavaScript code:</h2>
<pre id="code"></pre>
<script>
  document.getElementById('code').textContent =
      document.getElementById('script').text;
</script>
</body>
</html>
Removes examples from jsbin.com 2014-09-16 23:24:48 +09:00			`<!DOCTYPE html>`
			`<html>`
			`<head>`
			`<meta charset="UTF-8">`
			`<title>'Hello, world!' example</title>`
			`</head>`
			`<body>`

			`<h1>'Hello, world!' example</h1>`

Add `direction: ltr;` to the canvases used in `examples/learning`, to ensure correct text rendering (issue 11457) This is currently the only possible way of addressing the issue, until https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/direction becomes generally available in browsers. Note: This will also require manually updating https://mozilla.github.io/pdf.js/examples/#interactive-examples 2020-01-12 20:25:23 +09:00			`<canvas id="the-canvas" style="border: 1px solid black; direction: ltr;"></canvas>`
Removes examples from jsbin.com 2014-09-16 23:24:48 +09:00
Adds gulp dist-install command; using pdfjs-dist package in examples. 2017-05-11 08:28:18 +09:00			`<script src="../../node_modules/pdfjs-dist/build/pdf.js"></script>`
Removes examples from jsbin.com 2014-09-16 23:24:48 +09:00
			`<script id="script">`
			`//`
			`// If absolute URL from the remote server is provided, configure the CORS`
			`// header on that server.`
			`//`
			`var url = './helloworld.pdf';`

			`//`
Fixes all examples to require workerSrc to be set. 2015-11-06 22:39:13 +09:00			`// The workerSrc property shall be specified.`
Removes examples from jsbin.com 2014-09-16 23:24:48 +09:00			`//`
Rename the globals to shorter names. pdfjsDistBuildPdf=pdfjsLib pdfjsDistWebPdfViewer=pdfjsViewer pdfjsDistBuildPdfWorker=pdfjsWorker 2018-03-16 05:49:28 +09:00			`pdfjsLib.GlobalWorkerOptions.workerSrc =`
Move the `workerSrc` option from the global `PDFJS` object and into `GlobalWorkerOptions` instead 2018-02-14 22:49:24 +09:00			`'../../node_modules/pdfjs-dist/build/pdf.worker.js';`
Removes examples from jsbin.com 2014-09-16 23:24:48 +09:00
			`//`
			`// Asynchronous download PDF`
			`//`
Convert `PDFDocumentLoadingTask`, in `src/display/api.js`, to an ES6 class Also deprecates the `then` method, in favour of the `promise` getter. 2018-11-08 21:40:06 +09:00			`var loadingTask = pdfjsLib.getDocument(url);`
			`loadingTask.promise.then(function(pdf) {`
Removes examples from jsbin.com 2014-09-16 23:24:48 +09:00			`//`
			`// Fetch the first page`
			`//`
Convert `PDFDocumentLoadingTask`, in `src/display/api.js`, to an ES6 class Also deprecates the `then` method, in favour of the `promise` getter. 2018-11-08 21:40:06 +09:00			`pdf.getPage(1).then(function(page) {`
Removes examples from jsbin.com 2014-09-16 23:24:48 +09:00			`var scale = 1.5;`
Update remaining examples, and docs, to utilize current API functionality (issue 10377) This contains a couple of changes that I missed elsewhere, sorry about that! 2018-12-24 20:28:20 +09:00			`var viewport = page.getViewport({ scale: scale, });`
Update the `learning/` examples with basic HiDPI-screen support This is essentially a simplified version of the code that's used in `PDFPageView`, which will hopefully reduce the number of issues opened specifically about blurry rendering. However, note that ideally users should base their implementations on the `components/` examples rather than using the API directly (the "viewer components" already support HiDPI-screens). 2021-09-07 21:43:53 +09:00			`// Support HiDPI-screens.`
			`var outputScale = window.devicePixelRatio \|\| 1;`
Removes examples from jsbin.com 2014-09-16 23:24:48 +09:00
			`//`
			`// Prepare canvas using PDF page dimensions`
			`//`
			`var canvas = document.getElementById('the-canvas');`
			`var context = canvas.getContext('2d');`
Update the `learning/` examples with basic HiDPI-screen support This is essentially a simplified version of the code that's used in `PDFPageView`, which will hopefully reduce the number of issues opened specifically about blurry rendering. However, note that ideally users should base their implementations on the `components/` examples rather than using the API directly (the "viewer components" already support HiDPI-screens). 2021-09-07 21:43:53 +09:00
			`canvas.width = Math.floor(viewport.width * outputScale);`
			`canvas.height = Math.floor(viewport.height * outputScale);`
			`canvas.style.width = Math.floor(viewport.width) + "px";`
			`canvas.style.height = Math.floor(viewport.height) + "px";`

			`var transform = outputScale !== 1`
			`? [outputScale, 0, 0, outputScale, 0, 0]`
			`: null;`
Removes examples from jsbin.com 2014-09-16 23:24:48 +09:00
			`//`
			`// Render PDF page into canvas context`
			`//`
			`var renderContext = {`
			`canvasContext: context,`
Update the `learning/` examples with basic HiDPI-screen support This is essentially a simplified version of the code that's used in `PDFPageView`, which will hopefully reduce the number of issues opened specifically about blurry rendering. However, note that ideally users should base their implementations on the `components/` examples rather than using the API directly (the "viewer components" already support HiDPI-screens). 2021-09-07 21:43:53 +09:00			`transform: transform,`
Update remaining examples, and docs, to utilize current API functionality (issue 10377) This contains a couple of changes that I missed elsewhere, sorry about that! 2018-12-24 20:28:20 +09:00			`viewport: viewport,`
Removes examples from jsbin.com 2014-09-16 23:24:48 +09:00			`};`
			`page.render(renderContext);`
			`});`
			`});`
			`</script>`

			`<hr>`
			`<h2>JavaScript code:</h2>`
			`<pre id="code"></pre>`
			`<script>`
			`document.getElementById('code').textContent =`
			`document.getElementById('script').text;`
			`</script>`
			`</body>`
			`</html>`