Problem with Javascript Class Method

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I created a Javascript class and used var to leave the attributes encapsulated, but when I use the method setNome() it doesn’t work.

class AA {
  constructor(nome, idade) {
    var nome = nome;
    var idade = idade || "";

    this.getNome = () => { return nome; };
    this.setNome = (nome) => { nome = nome; };
  }
}
javascript

1 answer

5


If you are using classes, you have no reason to do this kind of thing. Create methods and properties using this, that will be encapsulated in class instances. Something like this:

class User {
  constructor(name) {
    this.name = name;
  }
  
  getName() {
    return this.name;
  }
  
  setName(newName) {
    this.name = newName;
  }
}

const u = new User('Unnamed');
console.log(u.getName());

u.setName('Luiz');
console.log(u.getName());

If you don’t want classes, you can use a type of Factory Function:

function createUser() {
  let name = 'Unnamed';
  
  const setName = (newName) => name = newName;
  const getName = () => name;
  
  return {
    setName,
    getName
  };
}

const u = createUser();

u.setName('Luiz');
console.log(u.getName());

Personally, I prefer this second approach most of the time, since I find it clearer. Also, there are not all those confusions brought by this javascript.

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