ECMAScript Cookbook

How to do it...

1. Open your command-line application and navigate to your workspace.
2. Create a new folder named 07-06-setters-encapsulate.
3. Copy or create an index.html that loads and runs a main function from main.js.
4. Create a main.js file with a Rocket class that writes a ­_secretName property upon construction:

class Rocket { 
  constructor(name) { 
    this._secretName = name; 
  }  
} 

5. Add a getter and setter for a name property and only update it if the newValue is a string:

class Rocket { 
  // ... 
  get name() {    return this._secretName;  }  set name(newValue) {    if (typeof newValue === 'string') {      this._secretName = newValue;    } else {      console.error('Invalid name: ' + newValue)    } }

6. Create a main function that tries to set the name property to different ...