problem with js arrayCounter function

in this codechallenge i have to make a function, the question is:

Around line 17, create a function named 'arrayCounter' that takes in a parameter which is an array. The function must return the length of an array passed in or 0 if a 'string', 'number' or 'undefined' value is passed in.

 function arrayCounter(x){

        if(typeof x=="array"){

          return x.length;

        }else if

          (typeof x=="number" || typeof x=="string" || typeof x=="undefined"){

            return 0;

          }

      }

But when i submit this code I’ve got this error:

Bummer! If I pass in an array in to 'arrayCounter' of '1,2,3' I get undefined and not the number 3.

But I can’t find syntax errors and when I watch other examples I still cant find a solution.

Maybe you can help me by finding the issue? (sorry for my English, I come from The Netherlands, so it’s not perfect)