Overriding parent class static methods

We've seen previously that behaviors are not limited to class instances but are also attached to the classes themselves. These static methods can also be overridden by subclasses.

In this recipe, we'll see how to override static methods.

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...

1. Open your command line application and navigate to your workspace.
2. Create a new folder named 08-04-checking-with-instanceof.
3. Copy or create an index.html that loads and runs a main function from main.js.
4. Create two objects rocketMap and inactiveRocketMap:

// main.js 
let rocketMap = {};  
let inactiveRocketMap = {}; 

5. Define a new class named Rocket. Add a constructor. Use the name to assign the instance to the rocketMap and define a simple print method:

// main.js 
class Rocket { 
  constructor(name) { 
    this.name = name; 
    rocketMap...