[nick32m]

What's the problem of writing a function with a few lines of code and exports as a module?

I think it's totally fine. Like other people said, it's the mindset we borrow from Unix, do one thing and do one thing well. The function would be well tested, and could be reusable.

I don't understand why so many people just require lodash into their project (when they start project) while they only use one or only minimum set of the functions. I mean lodash is a very great library with clean and well tested code, but it's also quite bulky like a big utility lib, and for me most of the time I only need one or two of the functions I would just go to npm and find a module just do that thing.

[meric]

Also, Node.JS modules can be used browser side. On the browser you only want to include code you're using so you're not making the client downloading excessive code. A large 500kb module with one useful function is worse than a one 10kb module with the one function you need.