The recommended way is to put all pdfs under assets/static/pdfs so they would be copied to priv/static/pdfs by webpack copy plugin.

Then You still need to modify your endpoint to allow Plug.Static to serve pdfs…

only: ~w(css fonts images js favicon.ico robots.txt pdfs)

What is under priv/static is served by Plug.Static (if configured in the endpoint) but usually You don’t touch this folder… You put stuff in assets/static and they will be copied.

You should note that priv/static is not under git supervision, so the content is not persisted when You commit…

If You look at your application layout You find this kind of line, but I guess using the path is ok too (I did not test).

<script type="text/javascript" src="<%= Routes.static_path(@conn, "/js/app.js") %>"></script>