ES6 function with no parameters?

Question

Is there a way to make a function that is being called with no parameters ? for example, I have this class

export class Student {
  constructor(ssn) {
    this.SSN = ssn;
  }
  SocialSecurityNumber() {
    return this.SSN;
  }
}

I want to be able to do this:

let student = new Student(123456);
console.log(student.SocialSecurityNumber);

this doesnt work now, but is there a syntax that I can use to accomplish this ?

Answer 1

Just to add that an alternative to calling the function with parenthesis student.socialSecurityNumber() , you could make this a getter:

 class Student { constructor(ssn) { this.SSN = ssn; } get socialSecurityNumber() { return this.SSN; } } const student = new Student(123456); console.log(student.socialSecurityNumber); 

That way you could call it with the same syntax as a property.

Answer 2

If you are supporting Object methods, you can add object properties similar to the syntactic sugar you'd see in C#.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/defineProperty

Basically,

Object.defineProperty(this, 
                      'SocialSecurityNumber',
                      {
                          get: function() { return this.SocialSecurityNumber(); }
                      }

inside your constructor