Type 'Headers' has no properties in common with type 'RequestOptionsArgs'?
Update for 4.3 HttpClient
The new syntax to be compatible with HttpClient, introduced in angular 4.3, is:
import { HttpClient, HttpHeaders } from "@angular/common/http";private _options = { headers: new HttpHeaders({ 'Content-Type': 'application/json' }) };No more RequestOptions: parameters are added using the new immutable HttpParams Map.
Pre 4.3 / Http
I just noticed that RequestOptions now requires you to explicitly pass named options as an object, like:
headers: Headers = new Headers({ 'Content-Type': 'application/json' });options: RequestOptions = new RequestOptions({ headers: this.headers });