Can I use javascript to surface additional file types? #indieweb #teachthebweb if those file types have some kind of keywords or metadata attached. I

Can I use javascript to surface additional file types? #indieweb #teachthebweb if those file types have some kind of keywords or metadata attached.

I have a friend with a ton of downloadable materials. She wants people who download here stuff to get a "If you like that you may also like..."

Is there a tool that will search either by file type of div id?s

The files are mainly pdfs.