Duplicate and save

[laduma-maurizio]

I have an existing fillable pdf which I'm filling and flattening. What I want to do is save a copy of the modified PDF in the same folder of the existing one. Any Idea or example?

const getPdf = () => {

   // Fetch the PDF with form fields
    const formUrl = "/pdf/Scalable_Value_TEST.pdf";
    const formPdfBytes = await fetch(formUrl).then((res) => res.arrayBuffer());

    // Load a PDF with form fields
    const pdfDoc = await PDFDocument.load(formPdfBytes);

    // Get the form containing all the fields
    const form = pdfDoc.getForm();

    // Fill the form's fields
    form.getTextField("Prepared for").setText(name);
    form.getTextField("Dated").setText(date);
    form.getTextField("Saving").setText(total);

   // Flatten the form's fields
    form.flatten();

   // // DUPLICATE FILE AND RENAME HERE??

    // Serialize the PDFDocument to bytes (a Uint8Array)
    const pdfBytes = await pdfDoc.save();
}