Angular 4 error "Expected 2-3 arguments, but got 1"

Question

I have created a code that I want to upload files

  uploadImages(fda){
  return this.http.post(this.apiUrl+"/uploadImages/"+fda)
  .map((res : Response) => res);
}

but shows the error of

ERROR in E:/MCQ/CsExamsModule - Client/src/app/services/question.service.ts (90,14): Expected 2-3 arguments, but got 1.

Answer 1

Use {} as the second argument, like this:

return this.http.post(this.apiUrl+"/uploadImages/"+fda, {})