angular2-services

I have an Angular2 (ionic2) application. I have a function that request cities but I get an error that Property subscribe does not exists on this.cityService.getAllCities() . cityPage.ts has a function like this: getCities(){ this.cityService.getAllCities() .subscribe(cityData => { this.cityList = cityData; }, err => console.log(err), () => console.log('Complete!') ); } my cityService.getAllCities() function looks like this: getAllCities(){ return new Promise (resolve => { this.storage.ready().then(() => { this.storage.get('authData').then(authData => { let hdr = new Headers({'Content-Type':

Consider the utterly simple Angular 2 service: import { Injectable } from '@angular/core'; import {Category} from "../models/Category.model"; @Injectable() export class CategoryService { activeCategory: Category|{} = {}; constructor() {}; } And then the component using this service: import { Component, OnInit } from '@angular/core'; import {CategoryService} from "../shared/services/category.service"; import {Category} from "../shared/models/Category.model"; @Component({ selector: 'my-selector', template: ` {{categoryService.activeCategory.Name}}<br/> {{category.Name}}<br/> `, }) export class

I understand that provider is for getting service from another class but what is multi-provider and token thing? And also when we do multi=true ? provide(NG_VALIDATORS, { useExisting: class), multi: true }) multi: true means that one provider token provides an array of elements. For example all directives for router support routerLink , router-outlet are provided by ROUTER_DIRECTIVES . If a new provider is registered with the token ROUTER_DIRECTIVES , then it overrides the previously registered directives. If multi: true (on the first registered and the new provider) is set, the new directives

I wanted to convert the XML I received from Web API response to JSON in Angular 2. The application is developed in Nativescript. Not able to find a solution for this. I found an amazing package to make this very simple. xml2js For me on I am doing it in an angular 2 application but on the node side. npm install xml2js --save It is literally as simple as passing the xml like this, var parseString = require('xml2js').parseString; var xml = "<root>Hello xml2js!</root>" parseString(xml, function (err, result) { console.dir(result); }); In my app I had an xml file and used it like this, var fs =

I've spent the day diving into RxJS with Angular2, as the practice of modeling user interfaces as streams is new to me. I'm experimenting with a user service that provides a stream of User objects. The first User object will be provided when the user is authenticated. Additional User Objects may be provided when the User is updated, e.g. they update their profile. If the user is not logged when the application loads, or they logout, then null is emitted. As such, an observer implementation in a component would look like this: export class AppComponent { private user: User; private