ECMAScript Cookbook

How to do it...

1. Open your command line application and navigate to your workspace.
2. Create a new folder named 08-08-passing-class-as-an-argument.
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:

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

5. Create a class named InactiveRocket that extends the Rocket class and assigns a name and a lastFlow property in the constructor:

// main.js 
class InactiveRocket extends Rocket { 
 constructor(name, lastFlown) { 
    super(); 
    this.lastFlown = lastFlown; 
 } 
} 

6. Create a function isA that takes an instance and a klass argument and returns true if the constructor is the passed class:

// main.js function ...