Method Chaining in a Javascript Class [duplicate]

I am attempting to implement method chaining inside my subclass "setBall"

class Ball {
  constructor(name, size, power) {
    this.name = name;
    this.size = size;
    this.power = power;
  }   
}

let Ball1 = new Ball('Bomb',5,2);
console.log(Ball1);

class setBall extends Ball{
  constructor(name, size, power) {
    super(name, size, power);
  }

  setBall.setName(name) {
    this.name = name;
  }

  setBall.setSize(size) {
    this.size = size;
  }

  setBall.setPower(power) {
    this.power = power;
  }

  get getthrowSpeed() {
    return this.size + this.power;
  }
}

let Ball2 = new setBall('Big',3,7);
console.log(Ball2);

The error i recieve when testing it in the console is: Uncaught SyntaxError: Unexpected token .

The same error occurs if I add .prototype in between them as well. The methods work without 'setBall.' in front of them, but instead of inputing:

*Ball2.setName('blue');

Ball2.setSize(2);

Ball2.setPower(3);*

I would like to input: Ball2.setName('blue').setSize(2).setPower(3);

My question is, how do I chain these methods within the class?