Create temp pdf file using javascript

i want create temporary pdf file of active document have multiple artboard  in single pdf file,and artboards can have combination per user input.like if document have 4 artboards range can 1-2,1-3,1-4,2-4 etc.

 

var doc = app.activedocument;

            if ( app.documents.length > 0 ) {

            var savename = new file ( "dest" );

             saveopts = new pdfsaveoptions();

             pdfsaveoptions.savemultipleartboards = true;

            saveopts.artboardrange="1-3";

            doc.saveas( savename, saveopts );

            }

 

i have tried code no luck , code opening dialog save don't want,plz in advance.

please delete line , try again:

pdfsaveoptions.savemultipleartboards = true;

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