How to inject HttpClient in static method or custom class?

Question

I\'d like to use angular HttpClient in static method or class (in class it can\'t be defined as constructor parameter).

I tried something like:

Answer 1

Passing the need service/object as a parameter helps a lot. In addition, it helps testing and code "readability". This following solution works with any type of object you are trying to inject. And, at least, you inject it where/when needed. The calling object is responsible for injecting the needed object.

export class SomeNotInjectableService {
  static doSomething(injected: any) {
    httpClient = injected as HttpClient;
    if(httpClient) {
       httpClient.get(...);
     }
  }
}

then in your calling component or service, use it like this

  ...
  export class MyService/*or MyComponent*/{
      constructor(private http: HttpClient){}
      doTheThing(){
          SomeNotInjectableService.doSomething(this.http)/*...subscribe()*/;
      }
  }