That code fails in a whole host of cases, kind of proving that sometimes trivial "just one line" functions aren't actual that trivial to get right.

edit: fortunately there's an npm modules you can included to fix it...

Maybe F1axs knows that at this particular spot the string will never be empty? There are two philosophies in libraries; one is to check for every possible error in the lib function, the other is to state the pre-conditions in the documentation.

> Not that I agree with micro modules (I would rather see a set of js core libs)

Why not both? If you just want one part of a module, you can just import the dependency directly, if you want a whole core lib, you can do that.

Some people really like underscore and import that. I use ES6/7 functions for the most part, but underscore has some useful things I can import on their own.