411 REFERENCE · Wikibooks
JavaScript/OOP-classes/Exercises
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Topic: OOP - 2
1. Create a class 'Car' with (minimum) two properties.
100% "use strict";
class Car {
constructor(brand, model) {
this.brand = brand;
this.model = model;
}
show() {
return "My car is a " + this.brand + " " + this.model;
}
}
const myCityCar = new Car("Fiat", "Cinquecento");
const mySportsCar = new Car("Maserati", "MC20");
alert(myCityCar.show());
alert(mySportsCar.show());
2. Create a class 'Truck' that is a sub-class of the above 'Car' class. It has an additional property 'maxLoad'.
100% "use strict";
class Car { // same as above
constructor(brand, model) {
this.brand = brand;
this.model = model;
}
show() {
return "My car is a " + this.brand + " " + this.model;
}
}
class Truck extends Car {
constructor(brand, model, maxLoad) {
super(brand, model);
this.maxLoad = maxLoad;
}
show() {
return "My truck is a " + this.brand + " " + this.model +
". It transports up to " + this.maxLoad;
}
}
const myTruck = new Truck("Caterpillar", "D350D", "25 tonne");
alert(myTruck.show());