Factory a mechanism to enforce encapsulation

[OpenTechConsult]

Hi,

I reached chapter 7 of the book. I am on the section Factory:: A mechanism to enforce encapsulation. I can't understand how closure and scope enforce encapsulation. I can't understand the encapsulation in the given code snippet as an illustration

function createPerson (name) {
  const privateProperties = {}

  const person = {
    setName (name) {
      if (!name) {
        throw new Error('A person must have a name')
      }
      privateProperties.name = name
    },
    getName () {
      return privateProperties.name
    }
  }

  person.setName(name)
  return person
}

const person = createPerson('James Joyce')

console.log(person.getName(), person)

[oscaretu]

The function createPerson(name) returns an object with 2 methods: setName(name) and getName(). There isn't any other possibility of changing or accessing the value of privateProperties other that using that two methods. Those methods can access the privateProperties because a closure captures the context, and that context includes privateProperties. And the access to the value of privateProperties is encapsulated in the person object.