NIEROZUMIEMJAVASCRIPTU

import { Component } from '@angular/core';
import { NavController, NavParams, AlertController } from 'ionic-angular';
import { User } from '../../user-model';
import { Http, Headers } from '@angular/http';
import 'rxjs/add/operator/map';
@Component({
  selector: 'page-signup',
  templateUrl: 'signup.html'
})
export class Signup{
  user: User = {
    name: "",
    username: "",
    email: "",
    password: ""
  };
  this.data = {};
  this.data.name: string;
  this.data.username: string;
  this.data.email: string ;
  this.data.password: string;
  this.data.response: string;

  confirmPassword: string;
  url: string;
  headers: Headers;

  constructor(public navCtrl: NavController, public navParams: NavParams, public alertCtrl: AlertController, public http: Http) {
    this.headers = new Headers();
    this.headers.append('content-type', 'application/x-www-from-urlencoded');
    this.headers.append('cache-control', 'no-cache');
    this.headers.append( 'x-apikey', 'c0b179acd662d52601db1236cdbaf50fdfa31');
    this.data.name = '';
    this.data.username = '';
    this.data.email = '';
    this.data.password = '';
    this.data.response = '';
	this.http=http;

  }

  ionViewDidLoad() {
    console.log('ionViewDidLoad SignupPage');
  }
  goToLogin(){
    this.navCtrl.pop();
  }

signup() {
        var link = 'https://fiszki-32b3.restdb.io/rest/uzytkownik';
        var data = JSON.stringify({name: "MARCIN" ,username: "Marcin", email: "marcinokon@marcinokon.pl", password: "password"});

        this.http.post(link, data)
        .subscribe(data => {
         this.data.response = data._body;
        }, error => {
            console.log("Oooops!");
        });
  }
}