ECMAScript Cookbook

How to do it...

1. Open your command line application and navigate to your workspace.
2. Create a new folder named 08-06-using-composition-instead-of-inherritence.
3. Copy or create an index.html that loads and runs a main function from main.js.
4. Create a main.js file that defines a new class named Rocket. Add a constructor that takes a constructor argument name and assigns it to an instance property. Then, define a simple print method:

// main.js 
class Rocket { 
  constructor(name) { 
    this.name = name; 
  } 
 
  print() { 
    console.log(this.name + ' is a Rocket'); 
  } 
}  

5. Create a class named InactiveRocket that extends the Rocket class and assigns an additional lastFlow property in the constructor. Then, override the print method:

// main.js class InactiveRocket ...