Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript Object-Oriented JavaScript (2015) Constructor Functions and Prototypes Creating Multiple Instances with Constructors

What if I don't want the instance to have all properties of the prototype?


I was just wondering how can I create an instance of an object but without having all properties of the prototype:

function Person (name, job) { this.name = name; this.job = job; }

var Person2 = new Person ("Alina");

console // Person {name: "Alina", job: undefined}

I don't want the job property.

Thanks, Alina

2 Answers

Steven Parker
Steven Parker
229,982 Points

You need a different constructor.

By definition, objects of the same type must have the same properties. So in this case, you need a different constructor for your new object type that only establishes the properties you want to have.

I see, thank you.