It depends on the return value, yes. I usually try to keep modules small and use some kind of threading (needle + thread analogy, not os threads/web workers) s

It depends on the return value, yes. I usually try to keep modules small and use some kind of threading (needle + thread analogy, not os threads/web workers) strategy when building functions -- pulling out common patterns into globally visible utility functions that work with common types (e.g. jQuery events/objects). It's not ideal, but in the absence of a true type system, it's all about mitigating potential problem areas.