How to Set Document Properties When Generating PDF file in JavaScript

// function that creates BytescoutPDF instance (defined in BytescoutPDF.js script which have to be included into the same page)
// then calls API methods and properties to create PDF document
// and returns created BytescoutPDF object instance
// this CreatePDF() function is called from Sample.html
 
function CreatePDF() {
 
    // create BytescoutPDF object instance
    var pdf = new BytescoutPDF();
 
    var documentTitle = "Sample document title";
    var documentSubject = "Sample subject";
    var documentkeywords = "keyword1, keyword 2, keyword3";
    var documentAuthor = "Document Author Name";
    var documentCreator = "Document Creator Name";
 
    // set document properties: Title, subject, keywords, author name and creator name
    pdf.propertiesSet(documentTitle, documentSubject, documentkeywords, documentAuthor, documentCreator);
 
    // add empty page
    pdf.pageAdd();
 
    pdf.textAdd(20, 20, 'Document properties are set.', 0);
 
    // return BytescoutPDF object instance
    return pdf;
}