Check if array is empty or null

Question

I would like to know how to check if an array is empty or null in jQuery. I tried array.length === 0 but it didn\'t work. It did not throw any error either.

Answer 1

I think it is dangerous to use $.isEmptyObject from jquery to check whether the array is empty, as @jesenko mentioned. I just met that problem.

In the isEmptyObject doc, it mentions:

The argument should always be a plain JavaScript Object

which you can determine by $.isPlainObject. The return of $.isPlainObject([]) is false.