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Is there a specific reason that JavaScript returns [object Object] as a return value from valueOf() method?
Why not only [object] but [object Object] ?
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[object Object] is a string version of an object instance. This value is returned by a JavaScript program if you try to print out an object without first formatting the object as a string. It's no wonder developers get confused about this object: there are no error messages or warnings that tell us what is going on.
The valueOf() method returns the primitive value of the specified object.
The valueof() method in JavaScript is used to return the primitive value of a number. This method is usually called internally by JavaScript and not explicitly in web code. Return Value: The valueof() method in JavaScript returns a number representing the primitive value of the specified Number object.
The second Object is the interface the object implements. For example, document.body.valueOf() would return [object HTMLBodyElement].
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