In this chapter, you'll learn about the prototype property of the function objects. Understanding how the prototype works is an important part of learning the JavaScript language. After all, JavaScript is often classified as having a prototype-based object model. There's nothing particularly difficult about the prototype, but it's a new concept, and as such, may sometimes take a bit of time to sink in. Like closures (see Chapter 3, Functions), the prototype is one of those things in JavaScript which, once you get, seem so obvious and make perfect sense. As with the rest of this book, you're strongly encouraged to type in and play around with the examples - this makes it much easier to learn and remember the concepts.
In this chapter, we will cover the following topics:
Every function has a
prototypeproperty and it contains an objectAdding properties to the prototype object
Using the properties added to the prototype
The difference between own properties and properties of...