Object-Oriented JavaScript

Summary

Let's summarize the most important topics you have learned in this chapter.

• All functions have a property called prototype. Initially it contains an empty object.
• You can add properties and methods to the prototype object. You can even replace it completely with an object of your choice.
• When you create objects using a function as a constructor (with new), the objects will have a secret link pointing to their prototype, and can access the prototype's properties as their own.
• Own properties take precedence over prototype's properties with the same name.
• Use the hasOwnProperty() method to differentiate between own properties and prototype properties.
• There is a prototype chain: if your object foo doesn't have a property bar, when you do foo.bar ...