What is it with Javascript in particular that results in projects having a large number of dependencies and very small 3rd party packages?

Java has a large built-in standard library and developers often use 3rd party libraries like Apache Commons StringUtils that bundle multiple useful functionality into a single dependency. Before that C and C++ have standard libraries.

Python has the equivalent dependency management system to npm but doesn’t seem to suffer from the same huge number of small packages and dependency explosion (in my experience)

Is this because of the Javascript language or Javascript developers? Or do others think this is a good thing?