Interceptor not intercepting http requests (Angular 6)

Question

I\'m in the proces of adding an interceptor to my angular 6 project. To make calls to my API, I need to add a bearer token to all calls. Unfortunately the interceptor does n

Answer 1

In my case i had a post method like this:

this.http.post(this.authUrl, JSON.stringify({username: username, password: password})).pipe(
      map((response: any) => {
            let token: any = response.token;
            if (token) {
                localStorage.setItem('currentUser', 'value' }));                
                return response; 
            } else {
                return null;
            }
        }),
        catchError((error:any) => {return observableThrowError(error.json().error || 'Server error')})
      );

Because the map method could return null the interceptor stopt intercepting the requests made with this post method call. Don't ask me why this is so, but as soon as i replace null with say response everything started working again.