Summary

In this chapter you learned quite a few ways (patterns) for implementing inheritance and the following table summarizes them. The different types can roughly be divided into:

• Patterns that work with constructors

• Patterns that work with objects

You can also classify the patterns based on whether they:

• Use the prototype

• Copy properties

• Do both (copy properties of the prototype)

#	Name	Example	Classification	Notes
1	Prototype chaining (pseudo-classical)	Child.prototype = new Parent();	Works with constructors Uses the prototype chain	The default mechanism. Tip: move all properties/methods that are meant to be reused to the prototype, add the non-reusable as own properties.
2	Inherit only the prototype	Child.prototype = Parent.prototype;	Works with constructors Copies the prototype (no prototype chain, all share the same prototype object)	More efficient, no new instances are created just for the sake of inheritance. Prototype chain lookup during runtime- is fast, since there...