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

Gerry K
Gerry K
5,877 Points

Just want to clarify the use of the Constructor function

So just to clarify the following code:

function Contact(name, email) { this.name = name; this.email = email; }

var contact1 = new Contact('John', 'john@email.com');

This code above creates an object literal which looks like the following:

contact1 = { name: 'John', email: 'john@email.com' }

So if I want to access: console.log(contact1.name)

this would log 'John' to the console.

I hope someone can confirm that my thinking is correct as I'm having some difficulty cementing this idea based on the video alone.

Thank you!

2 Answers

Steven Parker
Steven Parker
229,644 Points

It seems like you have the right idea.

But the terminology is a bit off. The code with the constructor doesn't create an object literal, just an object. But the code on the next line does show an object literal which is equivalent to the object created by the constructor.

6,762 Points

Object literals are great when you only need one object. However, maintaining code with several object literals of the same type can get cumbersome. That's why you'd want to use a constructor function. It will handle the initial creation of objects, and will let you create as many objects of the same type as you'd like.