SAMPLE PLUNKER I see two options: Propagate the errors from component FormControl to <select> FormControl whenever the <select> FormControl value changes Propagate the validators from component FormControl to <select> FormControl Below the following variables are available: selectModel is the NgModel of the <select> formControl is the FormControl of the component received as an argument Option … Read more
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; })
The short answer is yes. Customer correctly implements Person since all fields of the interface are optional. Any object will correctly implement the interface. The usefulness of this interface is: On the implementer site, if any optional field is declared, the type must correspond (so phone has to be defined as number) On the receiving … Read more
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
There are limitations in the import syntax that make it difficult to do if not impossible without using external libraries. The closest I could get is by using the Dynamic Import syntax. Two examples follow: the first one is the original I wrote while the second one is an edit from a user that wanted … 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