Object is the primitive JavaScript object type. All JavaScript objects are descended from Object. That is, all JavaScript objects have the methods defined for Object.:

Category	Subject	Sinopsys	Description	Example
Property	constructor	Specifies the function that creates an object's prototype. Note that the value of this property is a reference to the function itself, not a string containing the function's name
Property	prototype	Represents the prototype for this class. You can use the prototype to add properties or methods to all instances of a class
Function	toSource()	Returns a string representing the source code of the object
Function	toString()	Returns a string representing the specified object
Function	valueOf()	Returns the primitive value of a object. The primitive value is inherited by all objects descended from the object. The valueOf() method is usually called automatically by JavaScript behind the scenes and not explicitly in code.
	toLocaleString
	hasOwnProperty
	isPrototypeOf
	propertyIsEnumerable