3D Game Programming for Kids, 2nd Edition

Copying Objects

In real life, you copy a cool idea or an interesting device by duplicating everything it does and changing a few things here and there to make it even better. The thing you’re copying becomes the prototype for the new way of doing it. JavaScript handles copying objects in a similar way.

To describe another movie, we can copy the prototypical bestMovie object with Object.create().

​var​ greatMovie = Object.create(bestMovie);
greatMovie.logMe();
​// => Star Wars, starring: Mark Hamill,Harrison Ford,Carrie Fisher​

Object.create() will create a new object with all the same properties and methods as the prototypical object we created earlier. So the new object, greatMovie, has the same title and actors as the ...