How to handle scripts, especially with dependencies?

[LordZardeck]

Is there a documented/supported way already for using JavaScript with widgets? I noticed that one of the native widgets adds some javascript in the template that loads an external file, stored on microapps.bigcommerce.com. My thinking is that one could simply have a file created and stored on the site's CDN, but then I wonder about dependencies. What if multiple widgets share the same dependencies, especially ones shared with the theme (lodash is the first thing that comes to mind).