injectable angular2

The messageservice code is as follows: import { Injectable } from '@angular/core';import { Subject } from 'rxjs';@Injectable({ providedIn: 'root'})export class MessageService { private messageSource = new SubjectThe code of the message sending component is as follows: TS import { Component} from '@angular/core';import { MessageService } from '../service/message.service';@Component({ selector: 'app-send',

Suddenly let me use ActivatedrouteImport {injectable} from "@angular/core"; import {Activatedroute} from"@angular/router"; import {Subscription} from"Rxjs/rx"; import {Usermodel} from"./shared/user.model"; @Injectable () export class UserService {protected User:usermodel; protected subscription:subscription; Constructor (protected activatedroute:activatedroute) { This. Subscription = This. ActivatedRoute.q

( this.http.get ('/assets/heroes.json '), this.http.get (' /assets/heroes.json ') ); Result.subscribe ( values = { Console.log ("All Values", values) } );Order send request sequentialrequests () { const sequence$ = this.http.getHero >('/assets/heroes.json ') . Switchmap (Hero = { hero.id+= '-TEST '; Return this.http.put ('/assets/heroes.json ', Hero) }); Sequence$.subscribe ();}6. Interceptors (int

): User|undefined {const session= This. Sessions[sessionid]; Const Issessionvalid= Session Session.isvalid (); returnIssessionvalid?session.user:undefined; }}//We want only global singletonExport Const Sessionstore =NewSessionstore ();On the client, once page loaded, we try to get user data first.Import {injectable} from ' @angular/core '; import {HttpClient} from' @angular/common/http '; import {Observable} from' Rxjs/observable '; import {User} from

In a proper unit test we want to isolate external dependencies as much as possible to guarantee a reliable test outcome. Http calls represent such external dependencies. Therefore, when testing our Angular and services that rely on the data retrieved via Http, we need to make sure to M Ock such calls and instead provide some fake data during the test execution. In this lesson we are about the new and that have been added in Angular v4.3.1 to make my life HttpClientTestingModule HttpTestingContro

Obviously in a real world application we don't only fetch data from the backend, but we also send data to be stored perma nently on the server side. The HttpClient gives us different options for achieving this. In this lesson we'll look at what attach parameters to our request URL by manually concatenating the URL by ourselves , by using the HttpParams object and also how we can send entire objects in a POST request body.Import {injectable} from ' @an

: ', firstname:firstname, L Astname:lastname}); This.myPatientService.httpPatchExample (ID, this.mypatient). Then (_ = This.getall ()); 40 }41 Delbyid (id:string) {This.myPatientService.delbyID (ID). Then (_ = = This.getall ()); 44}45} Service Code 1 Import {injectable} from ' @angular/core '; 2 Import {HttpClient, Httpparams, httpheaders} from ' @angular/common/http '; 3 4 Export class Patient {5 id:string; 6 firstname:string; 7 lastname:str

that need to be used in the form3.2 Creating an HTTP ServiceCreate a service file specifically to hold some methods of executing HTTP requests that rely on injected HttpClient in the service to execute HTTP requests using HttpClient objectsPit 01:httpclient The return value of the GET, post, delete, and put methods provided by the object is a JavaScript object that has been converted to JSON data and must use the object name if you want to get a property in the object [ ' Property name ' , you

The instance is in the background with MongoDB + node. JS's Restful API service. At the moment, just put in some code snippets, the entire demo code will be uploaded to GitHub later, the link will be updated in this article after uploading.1. Background implementation:' Use strict ';var mongoose = require (' Mongoose '),Community = Mongoose.model (' Community ');var Communityctrl = require ('.. /controllers/communitycontroller ');Exports.find_communities = function (req, res) {Community.find ({n

to memory Webapi, that is, to remove all the content associated with Inmemorywebapimodule. My hero.service.ts file is as follows: (where Heroesurl is configured as the address and name of the WEBAPI it publishes) Import {injectable} from ' @angular/core '; Import {Hero} from ' ... /models/hero '; Import ' rxjs/add/operator/topromise '; Import {httpclient, httpheaders} from ' @angular/common/http '; @Injectable