I need to add a hosted third-party JavaScript file in an Angular 2 component.  This file is updated anytime a change is made in the associated third-party vendors proprietary system, so I cannot simply pull down a copy, include it locally, and import...

So I am trying to subscribe to a simple service that return data from a local JSON file.   I have managed to get the service working, I can log it out in the function, but when I subscribe to the service in the angular 2 component, it is always undef...

in service section of angular.io tutorial for angular2 I hit a method named of.for example :  getHeroes(): Observable<Hero[]> {   return of(HEROES); }   or in below sample:  getHero(id: number): Observable<Hero> {   // Todo: send the mess...

I'm new to both Angular2 and Rxjs and I am a little confused about a particular case.  I have a simple service:  import { Injectable } from '@angular/core'; import { Observable, Subject } from 'rxjs/Rx'; import { Http, Response }...

I am very new in Angular 2 and I have the following question about services.  Into the main view (the one related to the app.component.ts class) I have this situation:  <div class="container">   <div class="row">     <d...

I have a service in sub-module that wraps some third-party module, instantiates and initializes its service to prepare for use within app.   @Injectable() class SubmoduleInitializerService {     constructor (thirdPartyService: ThirdPartyService) {...

I want to Pass parameters to POST method in angular 2 but it is not working whwn I used params:new httpParams().set() but it is not worked .I also tried params:new httpParams().set() and headers then also it is not worked & finally I got the solu...

TypeScript File  export class CompanyComponent  {   apiService : APIService;   data : any;   private companyUrl = 'http://localhost:4000/api/company/';    constructor(apiService : APIService) {     this.apiService = apiService;     this.getCo...

I have class Layer:  import {AfterViewInit, ViewChild} from 'angular2/core';   export class Layer implements AfterViewInit {   @ViewChild('element') element;    public canvas: HTMLCanvasElement = null;   public context: CanvasRenderin...

I was using EventEmitter and @Output in Angular services, today one of the coleagues mentioned it's not a good practice.  I found this post mentioning it's a bad practice and it seems mostly is personal opinion, and this answer is mentioning...