Section:

Export annotations using JavaScript

To extract data from PDF to FDF, then export FDF as XFDF

JavaScript

1async function main() {
2  const doc = await PDFNet.PDFDoc.createFromURL(filename);
3
4  // Extract annotations to FDF.
5  // Optionally use e_both to extract both forms and annotations
6  const doc_fields = await doc.fdfExtract(PDFNet.PDFDoc.ExtractFlag.e_annots_only); //PDFNet.PDFDoc.ExtractFlag.e_forms_only
7
8  // Export annotations from FDF to XFDF.
9  const xfdf_data = await doc_fields.saveAsXFDFAsString();
10
11  //optionally save the blob to a file or upload to a server
12  const blob = new Blob([xfdf_data], { type: 'application/xml' });
13}
14PDFNet.runWithCleanup(main);

Related Links

PDF Form Fill and Form Data Extraction
Full sample code which illustrates basic FDF merge/extract functionality and full support for FDF (Forms Data Format)

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