__WEBPACK_IMPORTED_MODULE_ xxxxx is not a function

(Was originally opened here: https://github.com/angular/angular/issues/15866)

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Current behavior Webpack (or Typescript) seems to strip static methods on inheritance. I’m posting here because the problem manifests in the context of Angular.

We’re using angularfire2, and more specifically FirebaseListObservable.

FirebaseListObservable extends Observable, so FirebaseListObservable should have the static function of.

However, when I do ng serve I get the following error:

__WEBPACK_IMPORTED_MODULE_1_angularfire2__.a.of is not a function
    at AppComponent.webpackJsonp.132.AppComponent.ngOnInit

Expected behavior Looking through angularfire2’s code for FirebaseListObservable, they extend Observable like expected, and thus of should be available. So I’m not thinking it’s their problem?

Minimal reproduction of the problem with instructions

ng new bug
npm install angularfire2 --save
npm install firebase --save
npm install rxjs --save

app.component.ts:

import { Component, OnInit } from '@angular/core';

import { FirebaseListObservable } from 'angularfire2';
import { Observable } from 'rxjs';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
  title = 'app works!';

  ngOnInit() {
    FirebaseListObservable.of({}).subscribe();
  }
}

ng serve --open

Please tell us about your environment:

• Angular version: 4.0.1

• Browser: [all]

• Language: TypeScript 2.2.2

• Node (for AoT issues): node --version = 7.8.0

[clydin]

You need to import any operators that will be used. For of:

import 'rxjs/add/observable/of';

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