Angular abstract class HttpClient injection
问题 Hi everyone, i'm new with Angular and I am having troubles with Injectable classes. I have an abstract class (on web.ts) which one of its protected attributes is an HttpClient object. The definition of this abstract class is as follows: import { HttpClient } from "@angular/common/http"; export abstract class Web { protected baseURL: string; constructor(baseURL: string, protected http: HttpClient) { this.baseURL = baseURL; } public abstract RetrieveData(pattern: string); } Then I have another