Overriding parent class instance methods
Ideally, classes contain more than just properties. Well-designed classes also define behavior. Thus, sub-classes should also be extending behavior, not just adding additional properties.
In this recipe, we'll see how to override methods from a parent class.
Getting ready
This recipe assumes you already have a workspace that allows you to create and run ES modules in your browser. If you don't, please see the first two chapters.
How to do it...
- Open your command line application and navigate to your workspace.
- Create a new folder named
08-03-defining-methods. - Copy or create an
index.htmlthat loads and runs amainfunction frommain.js. - Create a
main.jsfile that defines a new class namedRocket. Add a constructor that takes a constructor argumentnameand assigns it to an instance property. Then, define a simpleprintmethod:
// main.js
class Rocket {
constructor(name) {
this.name = name;
}
print() {
console.log(this.name + ' is a Rocket...
