Uncaught TypeError: Cannot read property 'top' of undefined

Question

I apologize if this question has already been answered. I\'ve tried searching for solutions but could not find any that suited my code. I\'m still new to jQuery.

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Answer 1

I know this is extremely old, but I understand that this error type is a common mistake for beginners to make since most beginners will call their functions upon their header element being loaded. Seeing as this solution is not addressed at all in this thread, I'll add it. It is very likely that this javascript function was placed before the actual html was loaded. Remember, if you immediately call your javascript before the document is ready then elements requiring an element from the document might find an undefined value.