What's the reason to use === instead of == with typeof in Javascript?

Question

Throughout many third-party libraries and best practices blogs/recommendations, etc... it is common to see syntax like this:

typeof x === \'object\' (instead         


        

Answer 1

There's no reason at all to favour === over == in this case, since both operands are guaranteed to be strings and both operators will therefore give the same result. Since == is one character fewer I would favour that.

Crockford's advice on this is to use === all the time, which is reasonable advice for a beginner but pointlessly paranoid if you know the issues (covered in other answers).