How to declare external identifiers?

[Entomologen]

I've googled for others with the same issue. And I tries searching your Q/A here. I have to say, I could not find a single one, sharing my concerns. I can't believe I am the only one wanting to do this.

Add globals to an editor

I use Ace mainly to show and edit javascript or lua, where my scripts are supposed to run inside a context environment. Most of my javascripts, for example, make use of jQuery. The jQuery library is included with the environment. So it doesn't show in the editor. As a result, I get a warning ('$' is not defined) every time i use it.

Now, this must be a common issue for most Ace workers, So, my question is: How do I add such identifiers to the editor? I'm guessing there is a method (e.g. editor.addGlobals(struct)). But I haven't been able to find it.