extends.js

// Js classes with extends
// https://jsfiddle.net/2j9fg96b/

class Datastream {
	constructor(solution, key) {
  	this.solution = solution;
    this.key = key;
  }
  
  toString() {
  	return `Solution: ${this.solution} | Key: ${this.key}`;
  }
}

class GetQueueDS extends Datastream {
	constructor(solution, key, props) {
  	super(solution, key);
    this.props = props;
  }
  
  toString() {
  	return super.toString() + `| Props ${JSON.stringify(this.props)}`;
  }
  
  exec() {
  	return `Executing ${this.key} with props: ${JSON.stringify(this.props)}`;
  }
}

let props = {
	id: '123'
};
const getQueue = new GetQueueDS('sky_at_bko', 'sky_at_bko_ds_get_queue', props);

console.log(getQueue.toString()); //Solution: sky_at_bko | Key: sky_at_bko_ds_get_queue| Props {"id":"123"}

console.log(getQueue.exec()); // Executing sky_at_bko_ds_get_queue with props: {"id":"123"}