Is JavaScript Supporting the constructor overloading concept? [duplicate]

Question

class Camera {
    constructor(id){
        this.id = id;
    }

    constructor(id, name){
        this.id = id;
        this.name = name;
    }
}

let camera = new Camera('A456','Karan');
let drone = new Camera('A1');


console.log(`camera: ${camera['id']} ${camera['name']}`)
console.log(`drone: ${drone['id']}`)



**IS the ABOVE code said as the constructor overloading?**

I am getting this code as success output but when i change the sequence of constructors , i am getting an error

As Javascript is able to allow parameters to be ignored. ie funcX(var1, var2) can be validly called using funcX() you effectively have overloading. You would need to protect and initialize variables not passed tho. — Bibberty
– Bibberty, Commented Dec 18, 2018 at 4:36
I have edited the code , please check and give a clarified answer — Karan KJ
– Karan KJ, Commented Dec 18, 2018 at 4:55

Bibberty · Accepted Answer · 2018-12-18 04:37:59Z

0

// Our object declares all the properties it natively supports.
function Person(name, age, location) {
  this.name = name;
  this.age = age;
  this.location = location;

  // Deal with essential properties
  if(this.name === undefined) this.name = 'John Doe';
};

var paul = new Person("Paul");

var person = new Person();

console.log(paul);
console.log(person);

answered Dec 18, 2018 at 4:37

Bibberty

4,7762 gold badges10 silver badges23 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Karan KJ · Accepted Answer · 2018-12-19 06:44:46Z

-2

Yes JavaScript supports the constructor overloading concept but Partially. It works according to bottom up Approach so it will work according to sequence of constructors.

The Code below will run according to the bottom up approach and will execute the output according to it.

class Camera {
    constructor(id){
        this.id = id;
    }

    constructor(id, name){
        this.id = id;
        this.name = name;
    }
}

let camera = new Camera('A456','Karan');
let drone = new Camera('A1');


console.log(`camera: ${camera['id']} ${camera['name']}`)
console.log(`drone: ${drone['id']}`)

answered Dec 19, 2018 at 6:44

Karan KJ

1411 silver badge8 bronze badges

1 Comment

Bergi Over a year ago

It's still an Uncaught SyntaxError: A class may only have one constructor.

Collectives™ on Stack Overflow

Is JavaScript Supporting the constructor overloading concept? [duplicate]

2 Answers 2

Comments

1 Comment

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Linked

Related