What did you expect? Nowadays, there is a common expectation, especially among web development libraries, for frequent updates, especially in the cases of bugs, etc. In the eyes of the people, functionality became more important than the documentation (though those people would like to claim otherwise, I'm sure).

The demand is for the new code to be available ASAP. And as a result, the documentation suffers, and the implementations and details change faster than the documentation can be maintained.

The emphasis of maintaining good documentation is further lessened by sources like StackOverflow, which provide the library maintainers with an excuse of "we can skip this step, since it will be covered in SO and countless blogs anyway. It's not like we're the only source of information."

This is just an unfortunate symptom of the modern coding ecosystem. Good documentation requires stability and consistency, which today are discouraged in favor of flexibility and quick turnovers.