Section:

Information dictionary: adding custom data to a PDF using JavaScript

To add custom data to an existing document.

1<html>
2  <script src="../lib/core/webviewer-core.min.js"></script>
3  <script src="../lib/core/pdf/PDFNet.js"></script>
4  <script>
5    (async function() {
6      Core.setWorkerPath('../lib/core');
7
8      // In case you have PDFDoc you can always access
9      // SDF/Cos document using PDFDoc.GetSDFDoc() method
10      const pdf_doc = await PDFNet.PDFDoc.createFromURL(filename);
11      const doc =  await pdf_doc.getSDFDoc();
12      const trailer = await doc.getTrailer(); // Get the trailer
13
14      // Create an Info dictionary
15      const info = await trailer.putDict('Info');
16      info.putString('Producer', 'Apryse PDFNet');
17
18      // Create a custom inline dictionary within Infor dictionary
19      const customDict = await info.putDict('My Direct Dict');
20      customDict.putNumber('My Number', 100);
21    })()
22  </script>
23</html>

Related Links

Cos/SDF low-level API to edit PDF files
Full code sample which illustrates how to use basic Cos/SDF API to edit an existing document.

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