What exactly are you referring to? Specifically typescript has zero dependencies.

Generally speaking, I agree, the npm-ecosystem still has this pervasive problem that pulling one package can result in many transitive dependencies, but a growing amount of well-known packages try to keep it as limited as possible. Looking at the transitive dependency graph is definitely good (necessary) hygiene when picking dependencies, and when done rigorously enough, there shouldn't be too many bad surprises, at least in my personal experience.