getRequest() {
  let request = this.$.ajax.generateRequest();
  request.completes.then(req => {
      // returns this.data;
      this.i = 0;
      console.log(this.history); // Logs several objects in array on 1st iteration
      this.getRequest2();
    })
    .catch(rejected => {
      // console.log(rejected.request); // rejected.error
    })
}


getRequest2() {
  if (this.i<this.data.length) {
      this.itemId = this.data[this.i].itemId;
      let request = this.$.ajax2.generateRequest();
      request.completes.then(req => {
        this.updateHistory();
      })
      .catch(rejected => {
        // console.log(rejected.request); // rejected.error
      })
    }
  }

updateHistory() {
  if(typeof this.responseStock.error == 'undefined') {
    this.push('history', {
      "itemId": this.response[0][this.i].itemId,
      "priceNet": this.responseStock.priceNet
    })
  } else {
    this.push('history', {
      "itemId": this.response[0][this.i].itemId,
      "priceNet": null
    })
  }
  this.i = this.i + 1;
  this.getRequest2();
}