Simple chain of responsibility pattern implemented using Javascript ES6

Chain-of-Responsibility-Pattern.js

class BaseDesign {
  setNext(next){
    this._next = next;
  }

  next(role){
    if(this._next){
      return this._next.run(role);
    }
    
    return `There are not Design for role ${role}`;
  }
}

class DesignOne extends BaseDesign {
  run(role){
    if(this.isMyResponsability(role)){
      // complex logic go here
      return "DesignOne";
    }

    return this.next(role);
  }

  // complex logic
  isMyResponsability(role){
    return role == 1;
  }
}

class DesignTwo extends BaseDesign {
  run(role){
    if(this.isMyResponsability(role)){
      // complex logic go here
      return "DesignTwo";
    }

    return this.next(role);
  }

  isMyResponsability(role){
    return role == 2;
  }
}

class DesignThree extends BaseDesign {
  run(role){
    if(this.isMyResponsability(role)){
      // complex logic go here
      return "DesignThree";
    }

    return this.next(role);
  }

  isMyResponsability(role){
    return role == 3;
  }
}

const designOne = new DesignOne();
const designTwo = new DesignTwo();
const designThree = new DesignThree();

designTwo.setNext(designThree);
designOne.setNext(designTwo);

let role = 1;

const finalDesing = designOne.run(role);

// complex logic go here
console.log(finalDesing);