Editing JavaScript/Notes/Prototype
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== Prototype Chain == | == Prototype Chain == | ||
Every object created by a constructor has an implicit reference (called the object’s prototype) to the value of its constructor’s “prototype” property. Furthermore, a prototype may have a non-null implicit reference to its prototype, and so on; this is called the prototype chain. When a reference is made to a property in an object, that reference is to the property of that name in the first object in the prototype chain that contains a property of that name. In other words, first the object mentioned directly is examined for such a property; if that object contains the named property, that is the property to which the reference refers; if that object does not contain the named property, the prototype for that object is examined next; and so on. ([http://ecma-international.org/ecma-262/5.1/#sec-4.2.1 §4.2.1 Objects]). | |||
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