3D Game Programming for Kids

Constructing New Objects

We now have a good idea of what an object is in JavaScript. We also now see how an object can be a prototypical object and act as a template for creating similar objects. Creating new objects like this can be pretty tedious and mistake-prone. Consider this: if we forget to assign the year property on great_movie, then the object will think Toy Story was made back in 1977. Unless we tell the object differently, it copies all properties from the original (star_wars) object, including the year, 1977!

We can also use a simple function to build objects in JavaScript—yes, the simple function that we first saw all the way back in Chapter 5, ​Functions: Use and Use Again​. Surprisingly, we don’t have to do anything special ...