how to set headers to application/json in angular2

Question

I am trying to send HTTP post request in Angular2 but not able to set headers to content type application JSON.

My code is:

login(url,postdata)
{
            


        

Answer 1

Angular 9 version for 2020

export class ApiService {

  private headers = new HttpHeaders({
    'Content-Type': 'application/json',
  });

  constructor(
    private http: HttpClient) {
  }

  get(path: string, params: HttpParams = new HttpParams()): Observable {
    return this.http.get(`${environment.apiUrl}${path}`, {params, headers: this.headers});
  }
}