Demonstrates private members using closure scope

js-class-private-members-example.js

const Person = (function() {
  // currentName cannot be modified externaly
  let currentName;
 
  function isGoodName() {
    return !!currentName.match(/Snehanshu/);
  }

  class Person {
  
    constructor(name) {
      currentName = name;
    }
 		
    set name(name) {
    	currentName = name;
    }
    
    get name() {
      return currentName;
    }
    
    get isGoodName() {
      return isGoodName();
    }
    set isGoodName(isGoodName) {
      throw new Error('Not allowed');
    }
  }
  return Person;
})();

const a = new Person('Snehanshu Phukon');
console.log(a.name);
console.log(a.isGoodName);
a.isGoodName = false;

const b = new Person('Matthew');
console.log(a.name);
console.log(a.isGoodName);
a.isGoodName = true;