Some test text!
To extract data from PDF to FDF, then export FDF as XFDF
const doc = await PDFNet.PDFDoc.createFromURL(filename);
// Extract annotations to FDF.
// Optionally use e_both to extract both forms and annotations
const doc_fields = doc.fdfExtract(PDFNet.PDFDoc.ExtractFlag.e_annots_only); //PDFNet.PDFDoc.ExtractFlag.e_forms_only
// Export annotations from FDF to XFDF.
const xfdf_data = doc_fields.saveAsXFDFAsString();
//optionally save the blob to a file or upload to a server
const blob = new Blob([xfdf_data], { type: 'application/xml' });
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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