Variable in file name

[foscone]

Hi,
is there a way to use a variable for a part of file name?

I'm thinking of something like:
<button onclick="return xepOnline.Formatter.Format('container',{
pageWidth:'210mm',
pageHeight:'297mm',
render:'download',
filename: `name-${variable}`
});">PDF</button>

Thanks

[jirodearmas]

I was able to use a PHP variable for the file name of the PDF. Don't know if it's possible for a JS variable.
This is what I used.
filename:'<?php echo $filename; ?>'