I was playing around with instanceof in Chrome but I got an error message. I think I know why (you have to supply a function after the instanceof keyword that is the constructor the object was created with), but the error message seems to be stating something else:

[1,2,3] instanceof Array
// true

[1,2,3] instanceof []
// TypeError: Expecting a function in instanceof check, but got 1,2,3

Does this mean that I should replace [1,2,3] with a function? I would think that [1,2,3] is correct and that [] is the problem and should be replaced with a function, but it looks like the error message is saying the opposite.

Could someone please explain how I'm interpreting the error message incorrectly?

javascript instanceof
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