Javascript Objects

Let’s review Objects in a bit more detail.

⚠ ️Do not explain classes yet, just javascript simple object literals.

Objects are like a group of functions that together have a greater purpose. E.g: In real life, a car has a bunch of functionalities that together make them a car: - A car can accelerate, break, turn on the engine, turn off the engine, etc. - A car also has shared properties (not only functions), a car is red with a serial number with 4 tires and many other properties.

This will be a Javascript Representation of a car object:

let car = {
    color: 'red',
    serialNumber: 'AKF345',
    numberOfTires: 4,
    currentSpeed: 0,
    accelerate: function(delta){
        this.currentSpeed = this.currentSpeed + delta;
    },
    break: function(delta){
        this.currentSpeed = this.currentSpeed - delta;
    }
}

To access or set an object’s properties, you can do so in the following ways:

// to set a proparty value
objectName.propertyName = valueToSet;
objectName['propertyName'] = valueToSet; //alternate way

//or to retrieve a propery value
let anyVariable = objectName.propertyName;
let anyVariable = objectName['propertyName']; //alternate way