Object-oriented programming allows procedures about objects to be created whose exact type is not known until runtime. For example ... DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction ...

In JavaScript, we could create an instance from the Dog class and use its properties ... keyword in the previous example. This keyword appears in many object-oriented programming languages.

One of the easiest ways to understand what is meant by ‘object oriented’, is to ... and straight forward programming language that just happens to use objects and classes.