Greasy Fork

Pulling external resources

I'd like to pull an external files to my userscript. To clarify, with the modularity in mind, I'd like to split some html elements into separate file, a css into a separate file and a json into a separate file. Then I'd like the main userscript pull those resources in and use them. These are not 3rd party resources, they would be my content - a part of the script itself. So my question is two-part. How would I handle it on the javascript-side, and second question is whether I'm able to host those on greasyfork, or do I need some other hosting - i.e. github.

thanks in advance.

If you really want, you can have these separate for development, then have a build script that combines them and outputs as a single JS file for installation.