http-rx-dom.js

// with rx-dom@7.0.3 & rxjs@5.5.6
import { ajax } from 'rxjs/observable/dom/ajax';
import { tap } from 'rxjs/operators';

const request = ajax.getJSON('http://myurl.com/data')
  .pipe(
    tap((jsonData) => console.log(jsonData))
  );

// Appel HTTP
request.subscribe(
  (jsonData) => {
    alert('SUCCESS !!');
    console.log(jsonData);
  },
  (err) => {
    alert('ERROR !!');
    console.error(err)
  });