[X] bug report => search github for a similar issue or PR before submitting
[ ] feature request
[ ] support request => Please do not submit support request here, instead see https://github.com/angular/angular/blob/master/CONTRIBUTING.md#question

      _xhr.addEventListener('load', onLoad);
      _xhr.addEventListener('error', onError);
      _xhr.addEventListener('timeout', onError);

      _xhr.send(this.request.getBody());

      return () => {
        _xhr.removeEventListener('load', onLoad);
        _xhr.removeEventListener('error', onError);
        _xhr.removeEventListener('timeout', onError);
        _xhr.abort();

import { Http } from '@angular/http';
...
// make a call to a location that runs into a timeout, e.g. invalid port
http.get('localhost:383838')
  .subscribe(function() {
    console.error('next will never get called on timeout');
  }, function(error) {
    // won't get called on timeout
    console.error('error will never get called on timeout');
  }, function() {
    // complete won't get called on timeout
    console.error('complete will never get called on timeout');
  })