Object-Oriented JavaScript - Second Edition

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 (an object without any own properties).
• 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 an object using a function as a constructor (with new), the object gets a secret link pointing to the prototype of the constructor, and can access the prototype's properties.
• An object's own properties take precedence over a prototype's properties with the same name.
• Use the method hasOwnProperty() to differentiate between an object's own properties and prototype properties.
• There is a prototype chain. ...