Constructor functions

A constructor function is given a Capitalized name to make it clear that it is a constructor

1var Car = function () {
2  this.wheels = 4
3  this.engines = 1
4  this.seats = 5
5}

To use a constructor function we call it with the new keyword in front of it like:

1var myCar = new Car()

To modify the properties of the new Car instance that you just created:

1myCar.nickname = 'Honda'

You can also pass in args to your constructor function, like you do in functions, of course.

Properties = Attributes Methods = Functions

Private methods and properties

To do this, we create the variable inside the constructor using the var keyword we’re familiar with, instead of creating it as a property of this.