ผสาน PDF ผ่านทาง JavaScript via C++

    var ffileMerge = function (e) {
        const file_reader = new FileReader();
        function readFile(index) {
        /*only two files*/
        if (index >= e.target.files.length || index >= 2) {
            /*merge two PDF-files and save the "ResultMerge.pdf"*/
            const json = AsposePdfMerge2Files(undefined, undefined, e.target.files[0].name, e.target.files[1].name, "ResultMerge.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");
            return;
        }
        const file = e.target.files[index];
        file_reader.onload = function (event) {
            /*prepare(save) file from BLOB*/
            AsposePdfPrepare(event.target.result, file.name);
            readFile(index + 1)
        }
        file_reader.readAsArrayBuffer(file);
        }
        readFile(0);
    }