LalanaChami

import { AbstractControl } from '@angular/forms';
import { Observable, Observer } from 'rxjs';

export const mimeType =(
  control: AbstractControl
): Promise<{[key: string]:any}> | Observable<{[key: string]:any}> =>{
  const file =control.value as File;
  const fileReader = new FileReader();
  const frObs = Observable.create((observer : Observer<{[key: string]:any}>)=>{
    fileReader.addEventListener("loadend", ()=>{