[tomatsu]

Either the IDE/editor is able to assist you or you have to consult the documentation regularly.

That's just how it is.

JS' standard library, for example, is really tiny but I haven't memorized all of it. If the editor can't clue me in, I have to check the docs.

[mmjaa]

Nothing wrong with doing any of it, as long as its a dependency you can manage while also maintaining productivity... but such is the life of a Javascript developer.