Can I make a js call to a js script which compiles after the calling script?

Without going into too much detail, I'm coming in late on a very poorly architectured project which I need to leverage some C# features and classes. We already have some nasty dependencies and crosstalk between C# and js scripts, and I need to have a major script in Standard Assets for priority compilation. If I were to use a non-priority js script as a "bridge" between a priority JS script and a priority C# script would I be able tot make calls from a js script living in standard assets to a js script living in a non-priority folder?