O'Reilly logo

Mastering JavaScript Design Patterns - Second Edition by Simon Timms

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Prototype

The final creational pattern in this chapter is the Prototype pattern. Perhaps this name sounds familiar. It certainly should: it is the mechanism through which JavaScript inheritance is supported.

We looked at prototypes for inheritance but the applicability of prototypes need not be limited to inheritance. Copying existing objects can be a very useful pattern. There are numerous cases where being able to duplicate a constructed object is handy. For instance, maintaining a history of the state of an object is easily done by saving previous instances created by leveraging some sort of cloning.

Implementation

In Westeros, we find that members of a family are frequently very similar; as the adage goes: "like father, like son". As each generation ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required