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JavaScript

Posted by paulscanlon
paulscanlon
Courses Plus Student 26,735 Points

Object oriented JavaScript

Hi all

Still trying to wrap my head around things like constructor functions etc.

These two calculators work exactly the same. What are the pros/cons of using either one?

workspace

Thanks

Paul

1 Answer

Steven Parker
Steven Parker
243,656 Points
Steven Parker
Steven Parker
243,656 Points

Well, "calcZero" is an object literal. It's a single instance of an anonymous object. But "calcOne" is a constructor function. When called with the "new" operator it will create a new "calcOne" object instance.

Also, "calcZero" is a plain object but "calcInstance" is a class object that contains a prototype that can be used to establish an inheritance chain.

If you only need one object of this type, and are not going to extend its properties to other classes, the anonymous object literal is probably a good choice. But if you have a need for more instances and/or derived classes, then the class constructor would be the way to go.

paulscanlon
paulscanlon
Courses Plus Student 26,735 Points

Thanks a lot, it's one thing copying what i've seen in a Treehouse video, but it's more difficult trying to understand why i'm doing these things. Cheers Paul