如何在Angular 5 HttpClientModule中传递3个参数而不是2个参数

Question

I trying to send 3 parameters to the back-end Router

// Function to get user's profile image
getProfileImage(): Observable<Blob>{
  this.createAuthenticationHeaders(); // Create headers before sending to API
  return this._http.get(this.domain + '/authentication/getProfileImageok', this.options, { responseType: "blob" });
}

but it said that it only can send two

Answer 1

No, You can't send three params as per official documentation if you want to send some params you must be attached to options as the second parameter of the get request.

Demo object -

get(url: string, options: {
    headers?: HttpHeaders | {
        [header: string]: string | string[];
    };
    observe?: HttpObserve;
    params?: HttpParams | {
        [param: string]: string | string[];
    };
    reportProgress?: boolean;
    responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
    withCredentials?: boolean;
} = {}): Observable<any> 

For more information refer here.

• https://www.concretepage.com/angular-2/angular-httpclient-get-example#get