You need to spy on a property of rxjs. Using spyOnProperty will solve the error. Try this import * as rxjs from ‘rxjs’ import { of, fromEvent } from ‘rxjs’; spyOnProperty(rxjs, ‘fromEvent’).and.returnValue(of({})) you can also add to getter/setters using this like spyOnProperty(rxjs, ‘fromEvent’, ‘get’).and.returnValue(false) Hope this helps
Assume your response from http.get is an array, here you are returning Promise from function memberService.getmemberheader, you should retrieve result of promise at its then callback instead (not assigning promise itself to array doughnutChartLabels). public doughnutChartLabels: string[]; this.memberService.getmemberheader().then(res => { this.doughnutChartLabels = res; })
There is typo in your html, change fromGroupName to formGroupName.
The best answer you’ll find is Pascal Precth’s one who explained that on a dedicated issue asked in December 2015: “Do Observables make sense for http?” (but feel free to read along, plenty of additional answers are really good too!) On top of my head: – Retry – Cancel – Enjoy all the Rxjs operators … Read more
You don’t need to export it. It’s just for convenience. If you add AppRoutingModule to AppModule you also implicitly import RouterModule this way. Otherwise you would need to import it explicitely @NgModule({ imports: [AppRoutingModule, RouterModule], }) export class AppModule {} for example to be able to use <router-outlet> or RouterLink in components declared in AppModule
TL; DR You should not treat environment.ts as something similar to process.env. The name is similar but the behaviour is absolutely not. All the settings from environment.ts will directly go to your code. That’s why it is not secure to put secrets to environments.ts in any way. The browser alternatives to environment variables (process.env) are … Read more
You can use promises with async/await async getUser() { if (this.storage.token == null || this.storage.token == ”) { return; } const t = await this.net.get<LoginModel>(`Authentication/GetUser`).toPromise(); this.storage.token = t.token; this.storage.user = t.user; console.log(this.storage.user); } See more: Promises async await ES8 async/await async/await tutorial async/await explained
query is something you just query for once, you can consider it as an equivalent of GET. watchQuery is something you constantly keep a watch on query, whenever that query will be refetched or the data related to that query is changed from anywhere else, this method will keep on emitting the updated data. It’s … Read more
If you look at the source for Subject.complete, you’ll find the answer: complete() { if (this.closed) { throw new ObjectUnsubscribedError(); } this.isStopped = true; const { observers } = this; const len = observers.length; const copy = observers.slice(); for (let i = 0; i < len; i++) { copy[i].complete(); } this.observers.length = 0; } Calling … Read more
Probably a bit late, but you could leverage the help of rxjs-spy. This solution is equivalent the proposed one, and, in my opinion, better maintainable. I usually enable it globally in main.ts as a fire and forget strategy. You simply have to: install rxjs-spy via your package manager import in main.ts the reference to the … Read more