เพิ่มส่วนหัวไปยัง PDF ผ่าน JavaScript via C++

    var ffileAddTextHeaderFooter = function (e) {
        const file_reader = new FileReader();
        file_reader.onload = (event) => {
        /*add page header a PDF-file and save the "ResultAddHeader.pdf"*/
        const json = AsposePdfAddTextHeaderFooter(event.target.result, e.target.files[0].name, "Aspose.PDF for JavaScript via C++", "", "ResultAddHeader.pdf");
        if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
        else document.getElementById('output').textContent = json.errorText;
        /*make a link to download the result file*/
        DownloadFile(json.fileNameResult, "application/pdf");
        };
        file_reader.readAsArrayBuffer(e.target.files[0]);
    };