I’m not aware of any library doing this like in Laravel, but it’s easy enough to set it up on your own.
Take a look at render_existing:
https://hexdocs.pm/phoenix/Phoenix.View.html#render_existing/3
You would have a bunch of these in your app.html, or wherever you define your top-level layout files:
<%= render_existing @view_module, "page_layout/head_scripts_css.html", assigns %>
<%= render_existing @view_module, "page_layout/head_scripts_js.html", assigns %>
and then a page_layout folder structure per view template where you would create and place these head_scripts_css.html as needed.
