Chapter 6. Inheritance

If you go back to Chapter 1, Object-oriented JavaScript and review the Object-oriented programming section, you'll see that you already know how to apply most of them to JavaScript. You know what objects, methods, and properties are. You know that there are no classes in JavaScript, although you can achieve the same using constructor functions. Encapsulation? Yes, the objects encapsulate both the data and the means (methods) to do something with the data. Aggregation? Sure, an object can contain other objects. In fact, this is almost always the case since methods are functions, and functions are also objects.

Now, let's focus on the inheritance part. This is one of the most interesting features, as it allows you to reuse existing code, thus promoting laziness, which is likely to be what brought human species to computer programming in the first place.

JavaScript is a dynamic language and there is usually more than one way to achieve any given task...