Using static methods to work with all instances

It can be a good idea to organize methods on a class, rather than on an instance of a class. One example is the Manager pattern. This pattern is useful when an object is expensive to create, or will be reused a lot.

In this recipe, we'll see how to use the static keyword to create a map for reusing instances of the Rocket 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...

1. Open your command-line application and navigate to your workspace.
2. Create a new folder named 07-07-static-methods-on-all-instances.
3. Copy or create an index.html that loads and runs a main function from main.js.

4. Create a main.js file with an empty object rocketMap and a class Rocket:

//main.js
let rocketMap = {};  
 
class Rocket {} 

5. Create a static method named find that looks up rockets by string on the Rocket class:

class Rocket { 
  // ...